Category: Expression of Interest (EOI)


Technical and Drawings Section For Lot1


   TRANSMISSION COMPANY NIGERIA (TCN)

Request for Bids

For

Digitization of Old Transmission Substation

Bid No: NTP-TR12

Volume 2: Technical and Drawings Section

 

Nigeria Electricity Transmission Project (NETAP)

Credit No: 61850-NG

Project ID No.: P146330

 (IDA Financed)

 

Transmission Company of Nigeria (TCN)

Project Management Unit

 

   Office Address:

   Office Address:

Telephone: +234-808 028 8802-3    Ocean House, Plot 1226 Aminu

Web Site: http//www.tcnpmu.ng    Kano Crescent, Wuse 2, Abuja

 

 

February 2021

 

 

ROCUREMENT DOCUMENT

 

 

 

 

Procurement of:

    

Digitization of Old Transmission Substations (NTP-TR 9)

 

Issued on: 2nd February, 2021

 

ICB No: NTP-TR12

 

 

Employer: Transmission Company of Nigeria (TCN)

 

Country: Nigeria___________

 

 

Table of Contents

 

Volume 1 – Bidding Instructions Section

PART 1 – Bidding Procedures…………………………………………………………………………………… 1-9

Section I.  Instructions to Bidders………………………………………………………………………. 1-11

Section II.  Bid Data Sheet…………………………………………………………………………………. 1-40

Section III.  Evaluation and Qualification Criteria (Without Prequalification)…………… 1-46

Section IV.  Bidding Forms…………………………………………………………………………………. 1-59

Section V.  Eligible Countries……………………………………………………………………………… 1-95

Section VI.  Fraud and Corruption………………………………………………………………………. 1-96

 

Volume 2 – Technical  and Drawings Section

 

PART 2 –Employer’s Requirements…………………………………………………………………………… 2-4

Section VII.  Employer’s Requirements…………………………………………………………………. 2-5

 

PART 3 – Conditions of Contract and Contract Forms…………………………………………………. 3-5

Section VIII. General Conditions (GC)……………………………………………………………………. 3-7

Section IX.  Particular Conditions……………………………………………………………………… 3-100

Section X.  – Contract Forms…………………………………………………………………………….. 3-104

 

 

 

 


 

 

 

PART 2 – Employer’s Requirements

 

 

 

 

Section VII – Employer’s Requirements

 

 

 

 

 

 

 

 

 

 

 

Contents

 

Scope of Supply of Plant and Installation Services by the Contractor. 6

Specification. 7

Forms and Procedures. 73

Form of Completion Certificate. 74

Form of Operational Acceptance Certificate. 75

Change Order Procedure and Forms. 76

Change Order Procedure. 77

Annex 1.  Request for Change Proposal 78

Annex 2.  Estimate for Change Proposal 80

Annex 3.  Acceptance of Estimate. 82

Annex 4.  Change Proposal 84

Annex 5.  Change Order. 88

Annex 6.  Pending Agreement Change Order. 90

Annex 7.  Application for Change Proposal 92

Drawings. 94

Please note that all drawings are contained in a Folder tagged Annex 3. 94

 

 

 

 

Scope of Supply of Plant and Installation Services by the Contractor

 

 

 

 

 

Specification

 

 

 

 

Technical Requirements for the

Digitization of Old Transmission Substation  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table of Contents

Table of Contents. iii

PART 1 – Bidding Procedures 1-9. iii

Section I.  Instructions to Bidders 1-11. iii

Section II.  Bid Data Sheet 1-40. iii

Section III.  Evaluation and Qualification Criteria (Without Prequalification) 1-46. iii

Section IV.  Bidding Forms 1-59. iii

Section V.  Eligible Countries 1-95. iii

Section VI.  Fraud and Corruption 1-96. iii

PART 2 –Employer’s Requirements 2-4. iii

Section VII.  Employer’s Requirements 2-5. iii

PART 3 – Conditions of Contract and Contract Forms 3-5. iii

Section VIII. General Conditions (GC) 3-7. iii

Section IX.  Particular Conditions 3-100. iii

Section X.  – Contract Forms 3-104. iii

PART 2 – Employer’s Requirements. 4

Contents. 5

Scope of Supply of Plant and Installation Services by the Contractor 6  5

Specification 7. 5

Forms and Procedures 73. 5

Drawings   94. 5

Please note that all drawings are contained in a Folder tagged Annex 3 94. 5

Definitions. 10

  1. Scope of Facilities. 13

B.1.1. Contractor’s obligations. 13

The new facilities shall be adequately equipped with all necessary protection and control equipment. Protection and control equipment shall be mounted appropriately as well as the control kiosks (to be) installed in the switch room and the control room. Telemetering and command equipment shall be incorporated into the existing SCADA system. 18

B.6. Material and Equipment 22

B.7. Tools, instruments and machinery. 24

B.9. Site / Transport Facilities. 24

B.9. Training. 25

C.2. General Requirements for Design and Construction. 30

D1.4. Transport and Shipping Conditions. 32

D1.5. Instructions. 33

D1.6. Installation. 33

D1.7. Inspection and Testing. 33

D.15. Marshalling Kiosk. 34

D.16. MV & LV Power Cables, Control Cables, Wiring. 34

D.17. Local Control Kiosk. 39

D.18. 132 kV Power Cables. 41

D.19. Outdoor Lighting Fixtures. 47

D.20. Earthing System.. 48

E.1. Installations, Reinforcements and Commissioning Tests. 54

E.1.1. Installation of Equipment 54

F.1. Spare Parts and Tools. 60

F.1.1. General 60

F.1.2.  Mandatory Spare Parts and Tools for New Equipment 60

F.1.5 Spare Parts Books. 62

F.1.6. Packing of Spare Parts. 62

G.1.4. Calculation and working plans. 64

  1. Submittals and Documentation. 65

I.1. Documents to be submitted with the Bid. 65

I.2. Documents to be submitted by the Contractor 66

I.3. As Built Drawings and Instructions. 67

3.1…… DRAWING(S) AND DOCUMENT(S) TO BE SUBMITTED DURING TENDER.. 68

3.2…… DRAWING(S) AND DOCUMENT(S) TO BE SUBMITTED FOR APPROVAL.. 69

3.0 ELECTRICAL RATING.. 70

Form of Completion Certificate 349. 73

Form of Operational Acceptance Certificate 350. 73

Change Order Procedure and Forms 351. 73

Change Order Procedure 352. 73

Annex 1.  Request for Change Proposal 353. 73

Annex 2.  Estimate for Change Proposal 355. 73

Annex 3.  Acceptance of Estimate 357. 73

Annex 4.  Change Proposal 358. 73

Annex 5.  Change Order 361. 73

Annex 6.  Pending Agreement Change Order 362. 73

Annex 7.  Application for Change Proposal 364. 73

 

 

Definitions

The following words and expressions shall have the meanings assigned to them in GCC (General Conditions of Contract) – Clause 1:

  • “Contract”,
  • “GCC”,
  • “SCC”,
  • “Employer”,
  • “Project Manager”,
  • “Contractor”,
  • “Contractor’s Representative”,
  • “Subcontractor”,
  • “Adjudicator”,
  • “Contract Price”,
  • “Facilities”,
  • “Plant and Equipment”,
  • “Installation Services”,
  • “Country of Origin”,
  • “Site”,
  • “Completion”,
  • “Time for Completion”,
  • “Pre-commissioning”,
  • “Commissioning”,
  • “Guarantee Test(s)”.

B. Scope of Facilities

B1. General

B.1.1. Contractor’s obligations

The Contractor’s obligations cover the provision of all Plant and Equipment required for the design, the manufacture (including procurement, quality assurance, construction, installation, pre-commissioning and delivery) of the Plant and Equipment, reinforcement of some of the existing substation equipment, Installation Services and commissioning of the Contract Facilities according to the provisions of GCC – Clause 7.

Generally, the Contractor is expected to carry out detailed inspection and tests on all the facilities to be supplied and installed in selected substations and to further reaffirm the scope of construction of plant and equipment.

The map of Nigeria which shows the location of the various substations is presented below.

 

 

 

 

 

 

 

 

 

 

 

 


 

B.1.2.1.    Operation of HV equipment

For operation of the protection and control schemes, it is assumed that the substations will be operated in the following ways:

  • Shall ensure that connection of each equipment and Control and Relay Panel (CRP) are provided for proper monitoring on the HMI and SCADA systems.
  • Substation Automation System (SAS) shall be integrated into existing TCN SCADA system and the signal shall be monitored at NCC Osogbo
B.1.2.2. 132kV Protection and Control system

The new scope of work shall also include integration of equipment into SCADA system and all the control and protection system shall be digital /numerical.

B.1.2.   General Comment

The scope of contract facilities is Digitization of Old Transmission Substations in some selected old substations. 

The scope also shall include all works, services and supply of Substation Automation System, Protection relay and control panels (DCS) equipment, interconnection of the equipment within the switchyard, Relay Kiosk and control building as specified hereafter and made fully operational and properly interfaced with each facility.

The description of the various work scope of contract facilities shall be defined as follows:

  • “installation” of equipment: includes erection, cabling, wiring, connection, testing and commissioning of said equipment, as well as associated civil works and earthing.
  • Decommissioning of the existing old equipment (RTU and unnecessary items). Installation and configuration of HMI computer systems and SAS softwares.
  • Programming and configuration of systems and protection relays. .

 

B.1.2.3.    Existing situation in the substations

The Bidders should visit the substations to reassess the existing situation. Bidders should ensure that the information related to the existing situation given in the present document are verified and also request for clarification if necessary.

It will be deemed that all Bidders have all necessary information to perform the design, installation and commissioning of all the equipment according to the present specifications.

The description of the existing installations given in this document, including but not limited to the description of the substation, the single line diagrams, the layouts (where available) etc, are provided in order to help define as precisely as possible the technical solution to be applied by the Contractor.

The bidder is expected to draw up an Environmental, Health & Safety plan on his initial visit to the site and submit it along with the bidding document: Details are in Appendix HS Clause 4.0 (Environmental pre-bid considerations) and Clause 9.0 (Work in Progress) of this bidding document. Bidders are therefore encouraged to visit each of the station to appreciate what is available on ground.

B.1.2.4.    Interface with projected installations

When contract facilities include substation equipment, the scope of contract facilities shall include making the adjoining and associated equipment functional. In this case, the interface with the installations will be located at the terminals of the new equipment as specified in the Bidding Document.

The scope of works foreseen by the Employer is defined separately for each substation in sections below.

The acceptance and commissioning tests of the installations are included in the scope of the contracts. The Contractors will be required to assist to carry out the tests of the control and protection equipment directly connected to the equipment supplied within their contracts and make the necessary remarks in case the results will not be satisfactory in order to operate their own tests for the commissioning and energizing of new or upgraded equipment adequately.

B.1.2.5.    Interference with substation operation

The technical solution and the corresponding work programme shall be prepared and implemented in order to minimize the possible impact of the installation or reinforcement works on the operation of the substations. They shall take into account the network operation requirements and the necessity to keep some important network elements energized.

B.1.2.6. Contract Packaging

Design, Supply, Installation, Configuration, Testing and Commissioning of Substation Automation Systems, Control and Relay Protection Systems in old Transmission Substations.

 

 

 

Digitization of Old Transmission Substation 

B.1.3.0.  Digitization of Old Transmission Substation 

B.1.3.1. General Description

The Digitization of Old Transmission Substation is to improve the automation systems or digitize old Transmission substation through the supply, installation, configurations, testing and commissioning of Substation Automation systems (SAS), Control and Relay Protection Systems in selected old Substations. There are different levels of automation requirement depending on the status of each Transmission Substation. The differences in substation requirement have been categorized in 4 groups.

 

B.1.3.2. General Description of the substation

The contract involves the supply, installation, configuration testing and commissioning of the following:

 

  • Partial Substation Automation Systems equipment – (Engineer & Operator Work stations- computer systems, Gateway and SAS software) and interconnection with the existing Siemens SICAM eRTU or ABB 560 RTU .

 

  • Full Substation Automation System equipment – (Engineer & Operator Work stations- Computer systems and SAS software) and Gateway (Station Communication manager, Ethernet switches, panel and accessories, Bay control Unit and 4* 48windows annunciation units).

The substations in this category require Full Substation Automation Systems to complement the new Distribution Control Systems (DCS) installation.

  • Full Substation Automation System equipment and 330kV, 132kV & 33kV Digital Control System (Numerical protection relays and control panels), including (Engineer & Operator Work stations- Computer systems and SAS software) and Gateway (Station Communication manager, Ethernet switches, panel and accessories, Bay control Unit and 48windows annunciation units).

The substations in this category require a complete replacement of the existing control and protection relays with Digital Control System and provision Substation Automation Systems

  • Supply of lots of communication cables (CAT 6 and 1419A), Optical fiber cable of various cores and sizes, splicers, connecting/ terminating tools and labeling devices.

 

  • These are required for interconnection and termination of the devices at each substations.

Details of the above descriptions and scope of work are contained in the Bidding Documents.

 

B.1.3.3A. Scope of Contract Facilities/ summary of equipment requirement:

Scope of Contract Facilities

  1. Six (6 Nos) Substations that requires Partial Substation Automation SAS (installation of HMI- Work Stations & Gateway) are to be connected with existing RTU.
  2. Five (5 Nos) Substations that require full Substation Automation System SAS (Work Station, Gateway and BCU) without Control & Protection relays.
  3. Two (2 Nos) Substations that require Full Substation Automation System SAS (Work Station, Gateway and BCU) with Control and Protection relays.

 

Lot 1: Abuja, Bauchi and Kaduna Regions (14 Substations)

Substation Automation System- HMI Work stations

REMARKS

1

Abuja

Katampe

132/33kV

Siemens eRTU

2

Abuja

Akwanga

132/33kV

Siemens eRTU

3

Bauchi

Numan Savannah

132/33KV

Siemens eRTU

4

Bauchi

Potiskum

132/33kV

Siemens eRTU

5

Kaduna

Talala Mafara

132/33kV

Siemens eRTU

6

Kaduna

Katsina

132/33kV

Siemens eRTU

7

Kaduna

Azare

132/33kV

ABB 560 RTU

Full SAS- HMI Work stations, Gateway and BCU without CRP

REMARKS

1

Abuja

Abuja Apo

132/33kV

Burnt Siemens eRTU

2

Abuja

Suleja

132/33kV

Defective Siemens eRTU

3

Abuja

Keffi

132/33kV

No RTU

4

Kaduna

Hadejia

132/33kV

Disconnected Siemens eRTU

Full SAS- HMI Work stations, Gateway and BCU with CRP

REMARKS

1

Abuja

Katampe

330/132kV

No RTU

2

Abuja

Ajaokuta

132/33kV

Defective Siemens eRTU

3

Kaduna

Zaria

132/33kV

Defective Siemens eRTU

 

  • Installation of protection and control panels, communication, SCADA equipment Substation Automation System (SAS) shall be integrated into existing TCN SCADA system and the signal shall be monitored at NCC Osogbo.

It includes all works, services, supply of new equipment, adaptation of all equipment and whatever that may be necessary to be done to deliver the substation as specified with control/protection equipment, associated cabling and civil works but not limited to the following:

 

B.1.3.3B. Scope of Contract Facilities/ summary of equipment requirement:

Scope of Contract Facilities

  1. Two (2 Nos) Substations that requires Partial Substation Automation SAS (installation of HMI- Work Stations & Gateway) are expected to be connected with existing RTU.
  2. Seven (7 Nos) Substations that require full Substation Automation System SAS (Work Station, Gateway and BCU) without Control & Protection relays.
  3. Three (3 Nos) Substations that require Full Substation Automation System SAS (Work Station, Gateway and BCU) with Control and Protection relays.

 

  • Lot 2: Lagos, Port-Harcourt, Benin and Enugu Region (12 Substations)

 

Substation Automation System- HMI Work stations

REMARKS

 

1

Lagos

Ogba

132/33kV

Siemens eRTU

 

2

Port Harcourt

Owerri

132/33kV

Siemens eRTU

Full SAS- HMI Work stations, Gateway and BCU without CRP

REMARKS

1

Port Harcourt

Yenegoa

132/33kV

No RTU

2

Port Harcourt

Ahoada

132/33kV

No RTU

3

Port Harcourt

Uyo

132/33kV

Defective  Siemens eRTU

4

Lagos

Alimosho

132/33KV

Defective  Siemens eRTU

5

Lagos

Ejigbo

132/33KV

Defective  Siemens eRTU

6

Lagos

Isolo

132/33KV

Defective  Siemens eRTU

7

Benin

Akure

132/33KV

Disconnected Siemens eRTU

Full SAS- HMI Work stations, Gateway and BCU with CRP

REMARKS

1

Port Harcourt

Afam I

132/33kV

No RTU

2

Benin

Ado Ekiti

132/33KV

No RTU

3

Enugu

Onitsha

330/132kV

Defective  Siemens eRTU

 

B.1.3.4. Selectivity study and protection setting calculation:

The contractor should establish the selectivity study and protection setting calculations for all the new equipment.

Commissioning test and energizing of all equipment.

The contractor should perform commissioning and energizing of all new equipment.

  The new facilities shall be adequately equipped with all necessary protection and control equipment. Protection and control equipment shall be mounted appropriately as well as the control kiosks (to be) installed in the switch room and the control room. Telemetering and command equipment shall be incorporated into the existing SCADA system.

 

B.1.1.13    Control Building:

Fixing of new control and relay panels in existing trench, EPC to make provision for frame and checker plate for new panel installation where necessary.

 

 

 

B.4.0. ENGINEERING

The Contractor shall perform all engineering design and site measurement necessary for the design, supply installation, configuration, testing and commissioning of the facilities, namely (not limited and as appropriate):

  • detailed single line diagram and switchyard layout drawings with equipment
  • batteries and chargers sizing calculations,
  • equipment connection diagram with calculation of voltage drops for ac power cables and dc supply to switching equipment,
  • protection relays setting table, and calculations and coordination study along with verification of burden and instrument transformers with sizing of control cables,
  • schedule of control, power and digital cables,

All these are subject to Project Manager’s approval prior to proceeding with any work.  If the Contractor deems it urgent to start the work without the Project Manager’s consent or approval, the Contractor will have to perform any corrective work that may result from Project Manager’s review and will not be entitled to any claim or compensation for such work.

B.4.1. Equipment Layout

The Contractor shall submit for approval by the Project Manager a detailed electrical design comprising:

  • single line diagram with main apparatus characteristics;

equipment arrangement overview and side views to scale showing dimensions, bill of material numbers (as connection details, control building outlines,

B.5.3. Electrical Distribution

The Contractor shall submit for approval by the Project Manager the design of electrical distribution as follows (non- limitative):

  • AC distribution system diagrams;
  • DC distribution system diagrams;
  • distribution system connection diagrams for main AC and DC distribution panels;
  • verification of AC load schedule and service transformer(s) power rating;
  • Verification of DC load schedule and capacity of battery (ies) and charger.

B.5.4. Control and Protection

The Contractor shall submit for approval by the Project Manager a complete detailed design of protective and control panels comprising (non-limitative):

  • single protective and metering diagram with characteristics of metering and protective transformers, devices identification, tripping and interlocking logic;
  • alarm diagram with alarming devices identification, annunciator windows number, SCADA point number, combining logic for each alarm, message to operator;
  • panel, cabinet or junction box cabling diagram showing connection of each cable wire to the terminal blocks or devices;
  • listing of all available signals of programmable logic controller for SCADA use;
  • schematic logic diagrams of automation with programmable logic controller;
  • listing of all data available from digital metering and protective devices obtained from digital interface by SCADA;
  • listing of available signals for fault recorders;
  • list of alarms, from the origin to the final grouping point and incorporation with SCADA system showing the arborescence with intermediate grouping points;
  • calculation brief of all protective relays settings along with coordination graphics.

 

The design shall be based on the followings (non-limitative):

  • Redundancy of main and backup protective circuits: Contractor shall design main and backup protective circuits to ensure complete segregation from the instrument transformers to the breaker trip coils using independent DC supplies: distinct current transformers cores, distinct panel enclosures (whenever possible), distinct cables apart from one another, etc …; common points between the two circuits are not allowed; in case the relays need to be connected to the same voltage transformer winding, separate feeders with mini-moulded circuit breakers (three poles) shall be used; an alarm signal shall be produced in case of circuit breaker opening or loss of voltage.
  • Cabling: diagram showing connection of each cable wire to the terminal block or device; the diagram shall be based on physical layout of the panel, cabinet or junction box showing cable wire spread on the terminal blocks strips; cables wires connection shall be executed in a standard consecutive manner by increasing wire number from top to bottom; the Contractor shall coordinate the internal wiring between devices and terminal blocks with equipment manufacturers to ensure that the cables will be connected in this standard fashion at both ends; the diagram shall be completed with incoming cable origin, size, number; panel wiring diagram can be used to indicate cables connections; principle of wire and terminal identification shall be submitted to the Project Manager for approval.
  • Substation control: Normal operation of substation shall be from local man-machine interface or from main SCADA control centre or regional control centre; a selector switch (or software equivalent) on each substation control panel allows to enable/disable remote SCADA operation; local substation operation can be performed manually from the man-machine interface or the mimic panel; operation from switchyard shall be possible by selecting the local position of local/remote selector on switchyard equipment panel; an alarm signal shall be produced if a selector switch allows for local or control building operation; In case of transformer automatic on load tap changer, normal operation shall be automatic; the manual/automatic operation shall be selectable from control building or control centre; the operation from the switchyard shall be possible by selecting the local/remote selector on-load tap changer panel; the local operation shall be manual only.
  • Metering and protection circuits: metering and protection circuits shall be segregated such that instrument transformer windings cannot be used simultaneously for both applications.
  • Line protection: The Contractor shall ensure compatibility with the remote existing substation line protection; the principle of existing line protection is:
    • main and back-up distance protection with permissive carrier scheme;
    • main and backup line differential protection in special application;
    • weak end infeed logic with echo type carrier scheme and under-voltage detection in remote substation (when applicable);
    • Telecommunication channels equipped with tele-protection units each suitable for at least two signals which provides independent signals for permissive under-reach, directional overcurrent permissive trip (1No), transfer trip (1No) and weak end infeed logic; the transfer trip is used for shunt reactor failures or line circuit breaker failure.
  • Fault recorder system comprising a master station for the purpose of data processing and fault analysis and;
  • Remote terminal units: located in various substations.

B.5.5. Cabling

The Contractor shall submit for approval by the Project Manager a detailed cabling design comprising (non-limitative):

  • cable routing diagrams showing path of cables from control building to the various apparatus and between apparatus;
  • list of cables showing cable number, origin and destination, type of cable, estimated length and nature of signals transmitted;
  • Cable bill of material given the total length of cable with safety margin for each type of cable.

The design shall be based on the followings (non-limitative):

  • Cable circuit segregation: a single cable shall not carry signals from redundant circuits; from AC and DC supplies at the same time and; from distinct DC supplies with AC power purposes.
  • Current transformer cables: shall only carry current from this current transformer set; the size of conductor shall be 6 mm2 Cu minimum; a junction box (supported by middle phase) shall be used for line current transformers to group the three phases; all terminals of individual cores shall be connected to the incoming terminal strip; jumpers are used to close the three phase circuit and link to the outgoing terminal strip which is connected to the cable departing for control building.
  • Voltage transformers cables: shall only carry voltage from this voltage transformers set; the size of conductor shall be 4 mm2 Cu minimum; a junction box (supported by middle phase) shall be used to group the three phases in a similar fashion as for current transformers; three poles mini-moulded circuit breaker shall be used for the incoming voltage signal and each individual feeder departing for the control building panels.
  • Spare wires: Contractor shall make provision for spare wires in such a way that there are at least 10 % spare wires available in the cables linking two equipments or junction boxes.
  • Cable laying: cables shall be laid separately by voltage level; the AC power cables shall be located preferably at bottom level of cable trenches and DC cables at higher level.

B.6. Material and Equipment

The Project Manager will coordinate in advance with the Contractor to schedule the time and point of delivery of all equipment and material supplied by the Employer.

The Contractor will advise the Project Manager of the schedule of transportation and delivery of all equipment and material that is included in his scope of supply.

B.6.1. Reception of Equipment on Site

The Contractor is responsible for the reception of equipment and material at site:

  1. Visual inspection
  • any damage to equipment packing or container shall be recorded in detail,
  • any leak of liquid or gas shall be recorded.

Special attention shall be given to fragile equipment such as porcelain insulators and control and protection panels.

  1. Packing list

An inventory of all shipment for shall be made on a packing list.

Any sign of unauthorized opening or violation of packing shall require a detailed inventory of the content of the packing to record any missing or stolen part.

The equipment and material packing shall not be opened until the Contractor is ready to proceed with the installation.

Damage reports shall be submitted to the Project Manager.  In case that the damaged equipment comes from the Employer, the Project Manager will take necessary measures for the repairs or replacement otherwise, it will be the Contractor’s responsibility to seek for the repair or replacement.

Once ready for assembly and erection of equipment, a detailed inventory of each packing will be made to insure completeness and integrity.  Care shall be taken to avoid mixing parts from identical equipment with different serial number.

  1. Log book and report

A log book shall be kept by the Contractor for all equipment and material received at site.

Log book shall include a copy of packing list and damage report.

The log book shall include all relevant inspection data such as special test made to a transformer (Megger of core and dew point reading).

B.6.2. Storage and security

The log book shall be the basis for the inventory of equipment and material stored at site.

Once the equipment and material has been received at site, the Contractor is liable for any damage, loss or robbery of a components or a part until the provisional take-over by the Employer.

All equipment and material that will be used inside a building of the substation shall be stored to prevent exposure to “outdoor” climatic environment.

As for equipment that will be used in the switchyard, a convenient area shall be provided where there is not water flooding and sufficient space for the lifting and handling machinery to maneuver.

Once the work has been completed, the Contractor will hand over to the Engineer all remaining unused material and equipment along with the spare parts, instruments and tools included in the supply.  Completeness and integrity of these components will be one of the criteria to deliver the provisional take-over certificate by the Engineer.

B.7. Tools, instruments and machinery

The Contractor shall provide all tools, instruments and machinery for erection, installation, connection and testing equipment necessary to obtain a completely functional installation

B.8. Test and Inspection

B.8.1. Quality Assurance Program

In general terms, the manufacturing quality assurance program must be in compliance with ISO 9000 standards. The Employer reserves the right to verify the document pertaining to the manufacturers’ quality assurance programs, as well as the application of the same in the manufacturing plants.

The Plant and Equipment and any part of the Facilities provided under the Contract shall be subject to quality inspections and tests by the Employer and/or the Project Manager (or their designated Representatives), during manufacture, erection and on completion according to the provisions of GCC – Clause 23.

The costs of all inspection and tests including the provision of the necessary test equipment, whether at the manufacturers works or on site, shall be borne by the Contractor and shall be deemed to be included in the Contract Price. Two Representatives each of the Employer and the Project Manager shall witness each test/inspection. For each visit out of Nigeria, all travelling expenses including return tickets, accommodation/feeding, daily out of pocket expenses, etc… for the Employer’s and Project Manager’s Representatives shall be the responsibility of the Employer.

B.8.2.

Program of visits for inspection shall be included in the Bid.

B.8.3. Witnessing of Factory Tests

The Contractor shall arrange for the Employer’s and Project Manager’s Representatives to witness factory tests.

Program of visits for factory tests shall be included in the Bid.

B.9. Site / Transport Facilities

B.9.1. Site Office

The Contractor shall provide for the exclusive use of the Project Manager one (1No.) Porta-cabin office at each site. It shall be located according to the Project Manager’s request and shall be available upon the arrival of the Contractor’s staff at site.

 

The offices shall be fully equipped and shall comprise of at least:

  • Air-conditioner;
  • Toilet, shower, hand wash basin with at least cold water supply;
  • Adequate office furniture, i.e. 1 lockable desk, 1 chair, 1 filing cabinet,;
  • Electricity supply on a 24-hour basis;

 

The offices shall be cleaned daily (if necessary) and in good condition by the Contractor.

The Project Manager’s office shall be equipped with GSM phone and recharged by contractor on monthly basis.

.9. Training (only applicable to Lot 1)

The training of the Employer’s staff in the operations, Rehabilitation and repairs of all systems and equipment shall receive the highest priority. The Employer’s staff shall be involved in all aspects of installation, commissioning and testing to thoroughly familiarise them with the equipment. The summary of the scope of training courses is included in the price schedules. 

The Contractor shall be responsible for providing sufficient training to the Employer’s staff to enable them to operate, maintain, fault find, and repair and to expand the entire range of installations from commissioning date. 

The Contractor shall continuously review the effectiveness of the training and shall inform the Employer or Project Manager in writing if at any time it is his opinion the training program needs improvement so as to meet the required objectives.  The Contractor shall inform the Employer or project Manager in writing of the necessary changes or additions required to meet the objectives. 

B.10.1. Scope of Training

Training will be required for engineers, electricians, technicians.  These personnel will be generally proficient in the skills appropriate to their occupations.

Training courses shall be provided to covering all of the major supplied equipment, including, but not limited to, the following subjects:

  • preventative and routine Rehabilitation,
  • fault finding, diagnostic and rectification.

For each proposed training course, the Contractor shall propose a suitable program and shall provide the following information:

  • assumed level of expertise of participants,
  • scope and depth of material to be covered,
  • expected duration of course,
  • maximum number of participants,
  • facilities required by way of equipment, teaching equipment, etc.,
  • proposed location of course (i.e. manufacturer’s works, third-party location, etc.,)
  • sample curriculum vitae of proposed course instructors.

Bidders are invited to put forward their own schedule if they consider that the suggested schedule could be improved upon.

B.10.2. Locations of Training

Training may take place either at the Employer’s premises or at the Contractor’s location or at other locations, which are agreed between the Contractor and the Employer.  It is expected that some of the training will take place at the Contractor’s works during the manufacture of the Employer’s equipment and that further training will take place on site during the equipment installation and commissioning.  During the training at Site, groups TCN Substation, Protection and SCADA engineers would be trained using the test equipment provided for the Automation and Protection Laboratory. The engineers should have hands-on experience in the following:

  1. Setting-up of the equipment for the laboratory including interconnection/networking of all components
  2. Setting-up of Control and Protection relay panels, bus bar Panel and fault recorder, gateway panel and interconnection of operator and engineering workstations
  • Installation and configuration of Human Machine Interface

Prices for the provision of each training course at site and or at the Contractor’s location shall be quoted separately by the Bidders.

For the trainings held at site and Employer’s premises, the Employer will provide lecture room facilities and standard teaching visual aid equipment (such as overhead projectors) for formal lecture courses. The contractor shall provide all the training materials and feeding.

Where courses are held at the Contractor’s location or at any other location arranged by the Contractor, the Contractor shall arrange transport and accommodation for trainees.  The Contractor shall bear the travelling costs of the trainees attending the courses.  Airfares shall be at economy rates. The Contractor shall also provide reasonable quality accommodation for the trainees during courses. 

The Bid shall clearly state the numbers of courses offered, number of attendees, course durations of the course and locations for the course.

Bidder shall quote the training costs on the basis of the instructor man-weeks for each module of course at the Contractor’s location, in addition to giving overall costs for transport and accommodation.

B.10.3 Automation and Protection Laboratory

 

The Automation and Protection laboratory is to provide continuous training for Protection, SCADA and Operations Engineers in TCN. It would be located in a place agreed upon by the employer. Setting up of all components of the laboratory would be carried out by the Contractor and TCN engineers during the training sessions. The components of the laboratory include but not limited to the following:

  1. Secondary test Kit ( Mobile Relay Test System)
  2. Transmission Line Protection Panel (Line differential relay, line distance relay, breaker failure protection, lockout relay)
  • 330 kV AutoTransformer Protection System (Transformer Differential protection and REF protection, Transformer Auxilliary Proteciton, HV side Back-up Protection)
  1. 132 kV transformers Protection System
  2. 330kV Busbar Protecion and Fault Recorder
  3. Gateway Panel (Remote Terminal Unit , GPS Time Receiver, Protocol Converter – where the system is propriety , Ethernet Switch)
  • HMI and Operator Workstation (HMI Server and Client Computer, Operator Workstation, Substation Automation System software (Including the SQL-server 2000)
  • EMS System (HIS Server, Front End Server)
  1. Communication Cable
  2. Printer
  3. Web interface
  • AC, DC UPS , MCB, accessories for connection

C.1.4. Units of Measurement

On all drawings or documents, and in all correspondence metric units of measurements are to be employed exclusively.

C.1.5. System Characteristics

Particulars of System for the 330kV, 132kV and 33kV systems are as follows:

Details

Unit

330kV System

132kV System

33kV System

Number of Phases

No.

3

3

3

System Earthing

 

Solidly grounded

Solidly grounded

Impedance grounded

System Frequency

Hz

50

50

50

Nominal System Voltage

kV

330

132

33

Highest System Voltage

kV

420

145

36

 

 

 

 

 

 

 

 

 

C.1.5. System Characteristics

Particulars of System for the 330kV, 132kV and 33kV systems are as follows:

Details

Unit

330kV System

132kV System

33kV System

Number of Phases

No.

3

3

3

System Earthing

 

Solidly grounded

Solidly grounded

Impedance grounded

System Frequency

Hz

50

50

50

Nominal System Voltage

kV

330

132

33

Highest System Voltage

kV

420

145

36

 

 

 

 

 

 

 

 

 

 

 

C.1.6. Insulation Levels

According to IEC 60071-1, the standard withstand voltages for the phase-to-earth, phase-to-phase and longitudinal insulation of all equipment and installations of the 330 kV, 132 kV and 33 kV systems are the following:

Rated Voltage

kV

(r.m.s. value)

Highest Voltage for equipment
Um

kV

(r.m.s. value)

Standard short-duration power-frequency withstand voltage

kV

(r.m.s. value)

Standard lightning impulse withstand voltage

kV

(peak value)

33

36

70

170

132

145

275

650

 

Rated Voltage

kV

(r.m.s. value)

Highest Voltage for equipment

Um

kV (r.m.s. value)

Standard switching impulse withstand voltage

Standard lightning impulse withstand voltage

kV (peak value)

Longitudinal insulation

kV

(peak value)

Phase-to-earth

kV

(peak value)

Phase-to-phase

(ratio to the phase-to-earth peak value)

330

420

950

950

1.50

1300

 

C.1.11. Auxiliary Services

The electrical supply to the equipment will be as follows:

 

 

AC

DC Protection

DC Communication

Nominal voltage V

415/240, 4 wires

110 V

48

Voltage variation %

± 10

-20, +10

-10, +20

Interrupting Capacity kA

14 sym

10

10

Grounding

effectively grounded

Isolated

positively grounded

 

C.1.12. Low Voltage Equipment

The 1 minute power frequency withstand voltage, phase-to-earth and phase-to-phase, for equipment with voltage up to 1000 V is 2000 V (r.m.s. value).

The 1 minute power frequency withstand voltage for printed electronic circuits is 1500 V (r.m.s. value).

C.2. General Requirements for Design and Construction

C.2.1. General

In complying with the requirements of the specification, both with respect to arrangement and detail, design is to conform to the best current engineering practices. Each of the several parts of the Plant and Equipment is to be of the maker’s standard design provided that this design is generally in accordance with the specification.

 

The essence of design should be simplicity and reliability in order to give long continuous service with high economy and low Rehabilitation cost.

 

Particular attention should be paid to internal and external access in order to facilitate inspection, cleaning and Rehabilitation.

 

The design, dimensions and materials of all parts are to be such that they will not suffer damage as a result of stresses under the most severe service conditions.

 

Fully detailed specifications of the several parts of the Plant and Equipment are to be submitted describing particularly the materials to be used.

 

The materials used in the construction of the Plant and Equipment are to be of the highest quality and selected particularly to meet the duties required of them.

 

Mechanisms are to be constructed to avoid sticking due to rust or corrosion. Workmanship and general finish are to be of the highest class throughout.

 

For remote control of the substations from a regional control centre, sufficient spare contacts (NO + NC) of the circuit breaker and isolator auxiliary switches and respective relays shall be provided to meet these requirements for future use.

 

All equipment is to operate without undue vibration and with the least possible amount of noise and is not to constitute a nuisance.

 

All equipment is to be designed to minimize the risk of fire and any damage that may be caused in the event of fire.

 

All equipment is also to be designed to be vermin-proof, prevent accidental contact with live parts and minimize the ingress of dust and dirt.

 

The use of materials which may be liable to attack by termites or other insects is to be avoided.

 

In choosing materials and their finishes, due regard is to be given to the humid tropical conditions under which equipment is to work.

 

The relevant data for climatic conditions are given in Section Error! Reference source not found. above. However, Bidder or Contractor shall make themselves familiar with the specific conditions at site and be responsible to observe all parts of delivery and any kind of erection.

C.2.2. Protection against Humidity and Condensation

Electrical equipment shall be protected against risk of condensation:

  • by natural or forced cooling;
  • by heating of air if necessary.

Each heater shall consist of a resistor insulated for 220 Volts 50 Hz, controlled by thermostat.

 

The panels’ aeration louvers are internally lined by an easily removable frame fitted with mosquito screen (wire mesh of maximum size 0.75 mm² and of plasticized brass).

 

If the equipment dimensions do not allow the use of louvers (such as small cubicle), the latter must be replaced by a set of small elbow pipes consisting of a nickel-plated brass cable gland of minimum internal diameter of 15 mm and fitted with wire mesh as above.

 

C.2.3. Protection against Corrosion

Electro-mechanical equipment shall be totally and appropriately protected so as to avoid corrosion of any parts of them. Such protection, which includes protection against electrolytic corrosion, applies to the frame as well as to the screws, bars, conducting parts, connections and all any other components of equipment: contacts, springs, etc…

 

The following protection processes are to be applied to the corresponding metals:

  • steel: cadmium-plating, chromium-plating, galvanizing, painting
  • brass: nickel-plating
  • aluminium and aluminium alloy ( except conductors ): anodic oxidation
  • zinc alloy ( zamak ) : cadmium-plating, chromium-plating
  • bronze (except nozzles and similar parts to be greased): nickel – plating

The following metals do not require treatment: gold, platinum, silver, nickel-silver, stainless steel 18/8.

 

The following protection against corrosion shall apply:

  • Painting for all surfaces, which will be ultimately impossible or difficult to maintain by painting, must be in stainless steel, brass, bronze or galvanized steel.
  • Galvanising as Specified herein.
  • Moving metal parts with the lubrication agent used for corrosion protection. Greasing points conspicuous and of easy access should be provided to lubricate movable parts. Entry of rainwater into the mechanisms through bearings, line shafts, bolts, etc, shall be prevented by stuffing.
  • Electrolytic corrosion shall be avoided by preventing directly connected steel or galvanized steel with copper. Appropriate bimetallic material shall be used for conducting parts and as well as for parts that may accidentally conduct electricity.

 

D1.4. Transport and Shipping Conditions

All parts shall be suitably packed during transport and all necessary precautions shall be taken to prevent damage while being transported. Impact recorders shall be provided for the transportation from the factory to the site.

D1.5. Instructions

Clear instructions shall be included in the Installation, Operation and Rehabilitation Manual regarding any special precautionary measures which must be taken during the erection, operation and Rehabilitation of each equipment.

D.16. MV & LV Power Cables, Control Cables, Wiring

D.16.1 General

The contract includes the supply and installation of control cables, together with racking, supports, fittings and connections, required for the satisfactory operation of the plant being provided under this contract.

All cables shall be adequate for the electrical and physical requirements of use as power and control cables. All cables shall have copper wire conductors.

The Contractor will be required to prepare cabling lists, schematic diagrams, and schedules for those cables to be provided under this contract. The lists, diagrams and schedules are to be submitted for approval before installation.

D.16.2.   Standards and Recommendations

Unless otherwise specified in Section herein, the wiring, the power and control cables, and the associated material shall be designed, manufactured, erected and tested in accordance with the latest issues of the applicable IEC, VDE and DIN standards.

The IEC recommendations concerned by the present specifications are indicated but not limited by the following:

IEC 60028 (1925)    International standard of resistance for copper

IEC 60228 (1978)    Conductors of insulated cables

First supplement (1982) – Amendment 1 (1993)

IEC 60183 (1984)    Guide to the selection or high-voltage cables.

   Amendment 1 (1990).

IEC 60230 (1966)    Impulse tests on cables and their accessories

IEC 60287    Electric cables – Calculation of the current rating.

IEC 60287-1-1 (2001) Part 1: Current rating equations (100 % load factor) and calculation of losses – Section 1: General.

IEC 60287-1-2 (1993) Part 2: Current rating equations (100 % load factor) and calculation of losses – Section 2: Sheath eddy current loss factors for two circuits in flat formation.

IEC 60287-1-3 (2002) Part 1-3: Current rating equations (100 % load factor) and calculation of losses – Current sharing between parallel single-core cables and calculation of circulating current losses

IEC 60287-2-1 (2001) Part 2-1: Thermal resistance – Calculation of thermal resistance.

IEC 60287-2-2 (1995) Part 2: Thermal resistance – Section 2: A method for calculating reduction factors for groups of cables in free air, protected from solar radiation.

IEC 60446    Basic and safety principles for man-machine interface, marking and identification – Identification of conductors by colours or numerals

IEC 60502    Power cables with extruded insulation and their accessories for rated voltages from 1 kV up to 30 kV

IEC 60811    Common test methods for insulating and sheathing materials of electric cables and optical cables

 

D.16.3.   Functional Specifications

D.16.3.1.   Working Conditions

The general working conditions are given in Section above. The cables shall be suitable for operation at the average ambient air temperature of 30°C. The maximum ambient shade temperature is 45° C. Cables shall be, if necessary, protected from direct sun-rays.

D.16.3.2.   Permanent current

The maximum permanent admissible current and the cross-section of the conductors of each cable will be determined taking into account the maximum power to be transported, the ambient temperature and the laying conditions, such as proximity with other cables, temperature and soil resistivity.

D.16.3.3.   Short-circuit withstand of power cables

The cross-section of the cables should be such that the maximum short-circuit current may travel through the cables without damage, during the operation time of the upstream protections set up to protect the cables and associated loads.

The minimum short-circuit period is of 1 sec.

The same prescriptions are still valid for cable protective screens during earth faults.

D.16.3.4.   Rated Voltage U0/U (Um)

  • MV Power cable 19/33 (36) kV

D.16.3.5.   Voltage drop

The cross-section of the cables should be such that the voltage at the loaded end of the cable should not be below the fixed limits during the transit of the maximum charge or during the start up of motors.

D.16.3.5.   Standardisation

For evident reasons of standardisation, different types of cables and different conductor cross-sections should be reduced to a minimum.

D.16.4.2   Low Voltage Power and Control Cables

The LV power cables shall be PVC insulated, wire armoured and PVC sheathed for a maximum voltage of 1kV. The maximum load factor shall be 0.7. The power cables shall be multi-core type with maximum of 4 cores with minimum cross-section of 2.5 mm².

All cores with cross-sections larger than 2.5 mm² shall be stranded. Each conductor shall be terminated at each end in a terminal block with a pressure or other approved type terminal.

Control cables shall be of multi-core type having 4, 7, 12, 19 or 24 cores. The minimum size shall be 2.5 mm². The cross-section of the conductor for current transformer circuit shall be not less than 4 mm². All control and measuring cables shall have at least 20% spare cores.

The conductor screen shall be of semi-conductive extruded, cross-linked, polyethylene, melted together with the conductor screen. The insulator shield shall be of semi-conductive, extruded material or graphite layer with an outer screen of semi-conductive type. The metallic screen shall be of copper wire and the helix shall consist of copper tape. The outer sheath shall be of PVC extruded.

D.16.4.3   Wiring

The wiring shall be constructed of stranded or solid copper conductors with PEC and PE insulation. The size shall be similar to the control cables described above except that, if necessary, the connections to annunciators or relays may be made with similar wire.

Each conductor of wiring shall be terminated at each end in a terminal block with a pressure or spade type terminal. The terminal shall be tinned copper and may be solder or compression applied. All ends of stranded conductors shall have end sleeves. If connections are made by smaller wires than 2.5mm² they shall be soldered.

The wiring diagrams must show the colours of wires. All wires are to be fitted with numbered ferrules of approved type and each termination bus wiring between control panels is to be fully insulated and to be completely segregated from the main panel wiring.


D.17.  Local Control Kiosk

D.17.1.   General

The local control kiosks shall include the interlocking devices, local control facilities, fault anunciators, push button for lamp tests, auxiliary equipment, terminals and selector switch for local-remote control for the associated circuit breaker bay.

The local control for the 330kV switchyard shall match the size of the local control in the 132kV switchyard as far as possible while the local control for the 132kV switchyard shall match the size of the local control in the 33kV switchyard. Drawings showing the details of the size and principal items in the kiosks shall be submitted for approval before production.

D.17.2.   Design and Construction Requirements

On the control boards in the local kiosk the control of all circuit breakers, isolators and earthing switches shall be possible by means of discrepancy switches with the direct control voltage of 110 V DC.

A special local/remote switch shall be provided by which the local control and the local annunciating lamps can be switched off.

On the control board a mimic diagram shall be provided showing buses, feeders, circuit breakers, isolators, etc.

Further the control board in the local kiosk shall contain:

  • all control relays for the local control as well as for position indicting and alarm annunciation,
  • distribution frames and terminals for the connection of all cables,
  • a simple alarm annunciating system for all those alarms which are not otherwise optically indicated on protection relays, etc.

 

 


 

E.1. Installations, Reinforcements and Commissioning Tests

E.1.1. Installation of Equipment

E.1.2

E.3.2.14.  Protection and Control Panels

  • check installation, anchoring, grounding, alignment, etc., of protection and control panels as per drawings
  • check individual meters and transducers for type and suitability as per drawings and specifications
  • check identification (panel, wiring, components, etc.)
  • check conditions, tightening and cleanness
  • check for missing or broken components
  • individual test of metering instruments and transducers:
  • record values by secondary current/voltage injection
  • record measuring values and errors (at 0 %, 50 %, 100 %, and 110 % of rating)
  • measuring of digital interface and error calculation
  • check setting parameters
  • annunciator tests:
  • check operation sequence and triggering of individual alarm inputs
  • check display system (window text, colour, etc.)
  • check output contacts
  • check local and remote control logic (opening and closing of devices)
  • check electrical interlocking (between divers devices and SCADA switch)
  • other tests as per manufacturer instructions
  • test each individual input/output of the programmable controller
  • test each algorithm of the programmable logic controller by simulating the corresponding input and reading the outputs
  • check individual protection and auxiliary relays for type and suitability as per drawings and specifications
  • relay test must be performed by secondary voltage and/or current injection (software simulation is not permitted);
  • individual relay test must be performed in order to check the functionality of each function of relay
  • the test of system protection must be performed in order to check the interaction between the different devices, timers, relays and protection logics
  • other tests as per manufacturer instructions

 

 

E.3.3.   Power and Control Cables

E.3.3.1.  Protection and Control Cables

All cables shall be tested

  • check installation, type, size, etc., as per specifications
  • check continuity
  • check terminals
  • check conductor connection tightening
  • check cable glands
  • insulation test with megger
  • check conductors identification (number or color code)
  • measure resistance including shield
  • check clearances of terminals

 

F.1. Spare Parts and Tools

F.1.1. General

This chapter describes the requirements of spare parts and tools for extension and reinforcement work of the substations.

The spare parts and tools required in accordance with this chapter are intended to be ordered together with the supply of equipment.

The Bidders shall keep in mind that the climatic conditions shall be very severe which may cause more rapid deterioration of some parts of the equipment than usual in suppliers’ countries.

F.1.2.  Mandatory Spare Parts and Tools for New Equipment

The Bidders shall quote for each Lot, the mandatory spare parts and special tools for new equipment per set as described here below. These prices will be added to the bid price for tender evaluation.

 

 

 

 

The sets of mandatory spare parts and special tools are the following:

F.1.4.8. Spare parts for Control and Protection Panels

  • Protective relays: one relay of each type with associated auxiliary instrument transformers and accessories.
  • Controllers: one spare card or module of each type (for input/output module a quantity of 5% is needed).
  • Metering: 5% of each type of instruments, with a minimum of one.
  • Switches, auxiliary relays, MCB : a quantity of 5% is needed.
  • Terminal blocks, wiring, wire ways : a quantity of 5% is needed.
  • Test instruments : injection test set, simulation terminal, digital interfaces, diagNo.tic software, test boards…

F.1.5 Spare Parts Books

For each separate piece of equipment the Contractor shall give a spare parts book. This spare parts book shall contain an assembly of the equipment which shall show all parts of the equipment separately marked, designated and referenced. The material of the part shall be indicated. The book shall present information in a simple manner so that non-technical personnel may be able to indent these spare parts. The lists of spare parts proposed by the Contractor shall be made with reference to the spare parts books.

F.1.6. Packing of Spare Parts

The spare parts shall be treated and packed for long storage under the climatic conditions specified in section Error! Reference source not found. herein.

Each spare part shall be clearly marked or labelled on the outside of its packing with its description and purpose and, when more than one spare is packed in a single case or other container, a general description of its contents shall be shown on the outside of such case or container and a detailed list enclosed. All cases, containers or other packages shall be marked and numbered in an approved manner for purposes of identification.

All cases, containers or other packages are liable to be opened for examination and packing shall be designed to facilitate opening and thereafter repacking.


 

The site and the area around the site shall be cleaned of all kind of building material, waste, etc.

G.1.4.

I.2. Documents to be submitted by the Contractor

The Contractor shall be responsible for producing and submitting to the Employer for approval all drawings and documents related to the design, manufacture, connection and/or commissioning of any equipment or installation to be supplied, erected, connected  and/or rehabilitated under the Contract.

The documents to be submitted by the Contractor shall comprise but shall not be limited) to the following:

  • Drawings schedules
  • Assembly drawings and list of materials
  • Design reports and calculation notes
  • Single line and cabling diagrams
  • Instruction and service manuals
  • Test reports and certificates
  • Program of shop tests
  • Packing drawings, if requested by Employer
  • Marking models, if requested by Employer
  • List of test required for commissioning
  • Detailed guides for installation
  • Detailed guides for commissioning
  • Work program (pursuant to GCC – Clause 18.1, 2 & 3)
  • Progress report (pursuant to CCC – Clause 18.4.)
  • Technical data schedule of major equipment

The Contractor shall guarantee that the equipment and the work are in accordance with all the requirements of the present specification including the data from Technical Data Schedules.

 

The Contractor shall furnish progress photographs showing the progress of works in each month and the finished works upon completion of the contract. The Progress photographs shall be included in the progress report.

During the progress of the works, three shots of photographs, or as many as necessary to adequately convey the work progress, shall be taken from different angles of each major area under construction.

The Photograph shall be provided in electronic and paper formats. The minimum size of the photographic prints shall be 150 x 100 mm. Three copies of each print shall be furnished monthly to the Employer / Project Manager with a description of the viewpoint and the date of taking the photograph written or stamped in ink on the back photographs.

I.3. As Built Drawings and Instructions

Two copies of as-built drawings, operating and Rehabilitation instructions as well as as-built drawings and final documents on a computerized form shall be submitted to the Employer/Construction Manager for checking and approval no later than three months before schedule commissioning date. The Employer will return one set to the Contractor with his comments.

Six (6) sets of modified as-build drawings and operating and Rehabilitation instructions shall be supplied not later than one month before the scheduled commissioning date.

The Contractor shall submit any other drawings, documents, etc., which the Employer/Construction Manager may require for the purpose of testing and/or verifying of equipment and installations. Wiring diagrams requiring modifications during testing shall be submitted at the time of taking-over.

 

 

 

 

 

 

 

 

 

Appendix A

Site Environment, Health & Safety Plan Evaluation Checklist

Contractors undertaking work relating to electric power sector are required to prepare a Site Environment, Health & Safety Plan for each contract specific to the risk that will or may be encountered during the execution of the contract. 

Where there is issue relevant to the contract, the safe work practice to be used by the contractor should be outlined in the Environment, Health & Safety management plan along with documentation to demonstrate employees are trained in the procedures.

The following is a list of issues that may apply to a contract. 

  • Lockout/tagout
  • Excavation/Trenching procedures
  • Confined Space Entry
  • Forklift Driver Environment, Health & Safety
  • Hot Work permits & cancellation
  • Emergency Response & evacuation
  • Ladders, Platforms, scaffolds and lifts
  • Site isolation
  • Fall protection
  • Waste disposal procedures
  • Driver Environment, Health & Safety
  • Back injury prevention
  • Site Housekeeping
  • Laboratory Environment, Health & Safety
  • Vehicle access to site
  • Electrical Equipment grounding
  • Emergency exit from site
  • Asbestos
  • Polychlorinated Biphenyls (PCBs)
  • Smoking
  • Fire Protection
  • Personal Protective Equipment
  • Hearing & sight conservation
  • First Aid
  • Signage of Work place, equipment & tools
  • Chemical Handling
  • Machine guarding
  • Manual handling
  • Working at height
  • Material storage
  • Waste disposal
  • Working at height
  • Contractor’s site office

 

 

 

 

 


 

 

Forms and Procedures

 

Form of Completion Certificate…………………………………………………………………………… 349

Form of Operational Acceptance Certificate…………………………………………………………. 350

Change Order Procedure and Forms……………………………………………………………………. 351

Change Order Procedure……………………………………………………………………………………. 352

Annex 1.  Request for Change Proposal……………………………………………………………….. 353

Annex 2.  Estimate for Change Proposal………………………………………………………………. 355

Annex 3.  Acceptance of Estimate……………………………………………………………………….. 357

Annex 4.  Change Proposal…………………………………………………………………………………. 358

Annex 5.  Change Order……………………………………………………………………………………… 361

Annex 6.  Pending Agreement Change Order……………………………………………………….. 362

Annex 7.  Application for Change Proposal…………………………………………………………… 364

 

 

 


Form of Completion Certificate

   Date:     

   Loan/Credit No:     

RFB No:     

______________________________

To: _________________________________

Dear Ladies and/or Gentlemen,

Pursuant to GCC Clause 24 (Completion of the Facilities) of the General Conditions of the Contract entered into between yourselves and the Employer dated _____________, relating to the ____________________,  we hereby notify you that the following part(s) of the Facilities was (were) complete on the date specified below, and that, in accordance with the terms of the Contract, the Employer hereby takes over the said part(s) of the Facilities, together with the responsibility for care and custody and the risk of loss thereof on the date mentioned below.

  1. Description of the Facilities or part thereof: ______________________________
  2. Date of Completion: __________________

However, you are required to complete the outstanding items listed in the attachment hereto as soon as practicable.

This letter does not relieve you of your obligation to complete the execution of the Facilities in accordance with the Contract nor of your obligations during the Defect Liability Period.

 

Very truly yours,

 

Title

(Project Manager)


Form of Operational Acceptance Certificate

   Date:     

   Loan/Credit No:     

RFB No:     

_________________________________________

To:  ________________________________________

Dear Ladies and/or Gentlemen,

Pursuant to GCC  Sub-Clause 25.3 (Operational Acceptance) of the General Conditions of the Contract entered into between yourselves and the Employer dated _______________, relating to the ___________________________________, we hereby notify you that the Functional Guarantees of the following part(s) of the Facilities were satisfactorily attained on the date specified below. 

  1. Description of the Facilities or part thereof: _______________________________
  2. Date of Operational Acceptance: _______________________

This letter does not relieve you of your obligation to complete the execution of the Facilities in accordance with the Contract nor of your obligations during the Defect Liability Period.

 

Very truly yours,

 

Title

(Project Manager)

 


Change Order Procedure and Forms

   Date:     

   Loan/Credit No:     

RFB No:     

 

CONTENTS

  1. General
  2. Change Order Log
  3. References for Changes

 

ANNEXES

 

Annex 1 Request for Change Proposal

Annex 2 Estimate for Change Proposal

Annex 3 Acceptance of Estimate

Annex 4 Change Proposal

Annex 5 Change Order

Annex 6 Pending Agreement Change Order

Annex 7 Application for Change Proposal

 

 


Change Order Procedure

 

  1. General

This section provides samples of procedures and forms for implementing changes in the Facilities during the performance of the Contract in accordance with GCC Clause 39 (Change in the Facilities) of the General Conditions.

  1. Change Order Log

The Contractor shall keep an up-to-date Change Order Log to show the current status of Requests for Change and Changes authorized or pending, as Annex 8.  Entries of the Changes in the Change Order Log shall be made to ensure that the log is up-to-date.  The Contractor shall attach a copy of the current Change Order Log in the monthly progress report to be submitted to the Employer.

  1. References for Changes

(1) Request for Change as referred to in GCC Clause 39 shall be serially numbered CR-X-nnn.

(2) Estimate for Change Proposal as referred to in GCC Clause 39 shall be serially numbered CN-X-nnn.

(3) Acceptance of Estimate as referred to in GCC Clause 39 shall be serially numbered CA-X-nnn.

(4) Change Proposal as referred to in GCC Clause 39 shall be serially numbered CP-X-nnn.

(5) Change Order as referred to in GCC Clause 39 shall be serially numbered CO-X-nnn.

Note:   (a) Requests for Change issued from the Employer’s Home Office and the Site representatives of the Employer shall have the following respective references:

Home Office CR-H-nnn

Site CR-S-nnn

(b) The above number “nnn” is the same for Request for Change, Estimate for Change Proposal, Acceptance of Estimate, Change Proposal and Change Order.


Annex 1.  Request for Change Proposal

(Employer’s Letterhead)

 

To:  ____________________________________ Date:

Attention:  ______________________________________

Contract Name:  _________________________________

Contract Number:  _______________________________

 

Dear Ladies and/or Gentlemen:

With reference to the captioned Contract, you are requested to prepare and submit a Change Proposal for the Change noted below in accordance with the following instructions within _______________ days of the date of this letter ____________________.

  1. Title of Change: ________________________
  2. Change Request No. __________________
  3. Originator of Change: Employer:  _______________________________

Contractor (by Application for Change Proposal No. _______[1]

  1. Brief Description of Change: _________________________________________________
  2. Facilities and/or Item No. of equipment related to the requested Change: _____________
  3. Reference drawings and/or technical documents for the request of Change:

Drawing No./Document No.   Description

  1. Detailed conditions or special requirements on the requested Change: ________________
  2. General Terms and Conditions:

(a) Please submit your estimate to us showing what effect the requested Change will have on the Contract Price.

(b) Your estimate shall include your claim for the additional time, if any, for completion of the requested Change.

(c) If you have any opinion negative to the adoption of the requested Change in connection with the conformability to the other provisions of the Contract or the safety of the Plant or Facilities, please inform us of your opinion in your proposal of revised provisions.

(d) Any increase or decrease in the work of the Contractor relating to the services of its personnel shall be calculated.

(e) You shall not proceed with the execution of the work for the requested Change until we have accepted and confirmed the amount and nature in writing.

 

(Employer’s Name)

 

(Signature)

 

(Name of signatory)

 

(Title of signatory)

 


Annex 2.  Estimate for Change Proposal

(Contractor’s Letterhead)

 

To: ______________________________    Date:

Attention:  _______________________________

Contract Name:  _______________________________

Contract Number:  _____________________________

 

Dear Ladies and/or Gentlemen:

With reference to your Request for Change Proposal, we are pleased to notify you of the approximate cost of preparing the below-referenced Change Proposal in accordance with GCC  Sub-Clause 39.2.1 of the General Conditions.  We acknowledge that your agreement to the cost of preparing the Change Proposal, in accordance with GCC Sub-Clause 39.2.2, is required before estimating the cost for change work.

  1. Title of Change: ________________________
  2. Change Request No./Rev.: ____________________________
  3. Brief Description of Change: __________________________
  4. Scheduled Impact of Change: ___________________________
  5. Cost for Preparation of Change Proposal: _______________[2]

(a) Engineering (Amount)

(i)   Engineer hrs x  rate/hr =     

(ii) Draftsperson   hrs x  rate/hr =     

Sub-total hrs   

Total Engineering Cost     

(b) Other Cost     

Total Cost (a) + (b)     

 

(Contractor’s Name)

 

(Signature)

 

(Name of signatory)

 

(Title of signatory)

 


Annex 3.  Acceptance of Estimate

(Employer’s Letterhead)

 

To:  ______________________________   Date:

Attention:  ________________________________

Contract Name:  _____________________________

Contract Number:  ___________________________

Dear Ladies and/or Gentlemen:

We hereby accept your Estimate for Change Proposal and agree that you should proceed with the preparation of the Change Proposal.

  1. Title of Change: ___________________________
  2. Change Request No./Rev.: _______________________________
  3. Estimate for Change Proposal No./Rev.: _______________________________
  4. Acceptance of Estimate No./Rev.: _______________________________
  5. Brief Description of Change: _______________________________
  6. Other Terms and Conditions: In the event that we decide not to order the Change accepted, you shall be entitled to compensation for the cost of preparation of Change Proposal described in your Estimate for Change Proposal mentioned in para. 3 above in accordance with GCC Clause 39 of the General Conditions.

 

(Employer’s Name)

(Signature)

(Name and Title of signatory)


Annex 4.  Change Proposal

(Contractor’s Letterhead)

 

To:  _______________________________ Date:

Attention:  _______________________________

Contract Name:  _______________________________

Contract Number:  _______________________________

 

Dear Ladies and/or Gentlemen:

In response to your Request for Change Proposal No. _______________________________, we hereby submit our proposal as follows:

  1. Title of Change: _______________________________
  2. Change Proposal No./Rev.: _______________________________
  3. Originator of Change: Employer:  [_______________________________

Contractor:  _______________________________

  1. Brief Description of Change: _______________________________
  2. Reasons for Change: _______________________________
  3. Facilities and/or Item No. of Equipment related to the requested Change: _______________________________
  4. Reference drawings and/or technical documents for the requested Change:

Drawing/Document No.    Description

 

 

  1. Estimate of increase/decrease to the Contract Price resulting from Change Proposal:[3]

 

   (Amount)

 

(a) Direct material

(b) Major construction equipment

(c) Direct field labor (Total    hrs)   

(d) Subcontracts

(e) Indirect material and labor   

(f) Site supervision

(g) Head office technical staff salaries

Process engineer    hrs @  rate/hr

Project engineer hrs @  rate/hr

Equipment engineer   hrs @  rate/hr

Procurement   hrs @  rate/hr

Draftsperson   hrs @  rate/hr

Total    hrs

(h) Extraordinary costs (computer, travel, etc.)

(i)   Fee for general administration,  % of Items

(j)   Taxes and customs duties

Total lump sum cost of Change Proposal  

(Sum of items (a) to (j))

Cost to prepare Estimate for Change Proposal

(Amount payable if Change is not accepted)

  1. Additional time for Completion required due to Change Proposal
  2. Effect on the Functional Guarantees
  3. Effect on the other terms and conditions of the Contract
  4. Validity of this Proposal: within [Number] days after receipt of this Proposal by the Employer
  5. Other terms and conditions of this Change Proposal:

(a) You are requested to notify us of your acceptance, comments or rejection of this detailed Change Proposal within ______________ days from your receipt of this Proposal.

(b) The amount of any increase and/or decrease shall be taken into account in the adjustment of the Contract Price.

(c) Contractor’s cost for preparation of this Change Proposal:2

 

(Contractor’s Name)

 

(Signature)

 

(Name of signatory)

 

(Title of signatory)

 


Annex 5.  Change Order

(Employer’s Letterhead)

To:  _______________________________ Date:

Attention:  _______________________________

Contract Name:  _______________________________

Contract Number:  _______________________________

 

Dear Ladies and/or Gentlemen:

We approve the Change Order for the work specified in the Change Proposal (No. _______), and agree to adjust the Contract Price, Time for Completion and/or other conditions of the Contract in accordance with GCC Clause 39 of the General Conditions.

  1. Title of Change: _______________________________
  2. Change Request No./Rev.: _______________________________
  3. Change Order No./Rev.: _______________________________
  4. Originator of Change: Employer:  _______________________________

Contractor:  _______________________________

  1. Authorized Price:

Ref. No.:  _______________________________    Date:  __________________________

Foreign currency portion __________  plus Local currency portion __________

  1. Adjustment of Time for Completion

None    Increase _________ days   Decrease _________ days

  1. Other effects, if any

Authorized by:    Date:   

(Employer)

Accepted by:  Date:   

(Contractor)


Annex 6.  Pending Agreement Change Order

(Employer’s Letterhead)

 

To:  _______________________________ Date:

Attention:  _______________________________

Contract Name: _______________________________

Contract Number:  [_______________________________

 

Dear Ladies and/or Gentlemen:

We instruct you to carry out the work in the Change Order detailed below in accordance with GCC Clause 39 of the General Conditions.

  1. Title of Change: _______________________________
  2. Employer’s Request for Change Proposal No./Rev.: _______________________________ dated:  __________
  3. Contractor’s Change Proposal No./Rev.: _______________________________ dated:  __________
  4. Brief Description of Change: _______________________________
  5. Facilities and/or Item No. of equipment related to the requested Change: _______________________________
  6. Reference Drawings and/or technical documents for the requested Change:

Drawing/Document No. Description

 

  1. Adjustment of Time for Completion:
  2. Other change in the Contract terms:
  3. Other terms and conditions:

(Employer’s Name)

 

(Signature)

 

(Name of signatory)

 

(Title of signatory)

 


Annex 7.  Application for Change Proposal

(Contractor’s Letterhead)

To:  _______________________________ Date:

Attention:  _______________________________

Contract Name:  _______________________________

Contract Number:  _______________________________

Dear Ladies and/or Gentlemen:

We hereby propose that the below-mentioned work be treated as a Change in the Facilities.

  1. Title of Change: _______________________________
  2. Application for Change Proposal No./Rev.: _______________________________ dated: _______________________________
  3. Brief Description of Change: _______________________________
  4. Reasons for Change:
  5. Order of Magnitude Estimation (in the currencies of the Contract):
  6. Scheduled Impact of Change:
  7. Effect on Functional Guarantees, if any:
  8. Appendix:

(Contractor’s Name)

(Signature)

(Name of signatory)

(Title of signatory)

Drawings

 

Please note that all drawings are contained in a Folder tagged Annex 3

 

 

 

[2] Costs shall be in the currencies of the Contract.

[3] Costs shall be in the currencies of the Contract.

2 Specify where necessary.

Find attached the Annex files –> Annexes

ADDENDUM TO BIDDING DOCUMENT-NTP-W2




Dear Bidders,
Please find attached Response to clarification, Addendum No. 1  to issued bidding document and Minutes of Pre-Bid meeting for the Refurbishment and Extension of two (2) Existing Control Centers at Benin & Ikeja-West for your information and also to enable your company submit a responsive Bid.
 
Other required/revised documents as attached as Appendix 1, 2, 3 and 4.
 
All Bidders should kindly know that this same documents have been uploaded in TCN-PMU website for your attention.
 
The submission date is Thursday, 28th January, 2021 at 12:00 Noon. Bid opening shall commence by 1.30pm prompt.
 
Kindly acknowledge the receipt of this email.
 
 
 
Best Regards
 
Fakinlede Samuel

TECHNICAL ASSISTANCE FOR ENGINEERING, SUPERVISION AND SITE MANAGEMENT

 

 

 

 

 

 

NIGERIA ELECTRICITY TRANSMISSION PROJECT (NETAP)

 

 

 

 

 

TERMS OF REFERENCE (TOR)

 

 

 

for

 

 

 

TECHNICAL ASSISTANCE FOR ENGINEERING, SUPERVISION AND SITE MANAGEMENT OF RECONDUCTORING OF NTP-TR5G AND NTP-TR5E TRANSMISSION LINES

 

 

 

PREPARED

 

 

 

BY

 

 

TRANSMISSION COMPANY OF NIGERIA (TCN)

PROJECT MANAGEMENT UNIT (PMU)

NO, 10, KUNENE CLOSE, OFF BOBO STREET

OFF GANA STREET, MAITAMA ABUJA.

 

 

 

 

 

NOVEMBER 2020

 

 

 

 

 

 

 

1.0       BACKGROUND

 

The Federal Government of Nigeria has received a credit on behalf of Transmission Company of Nigeria (TCN) from the International Development Association (IDA) under the World Bank towards the cost of Nigeria Electricity Transmission Project (NETAP).  The Company, therefore, intends to apply part of the proceeds of this credit for payments under the Contract for Engineering Supervision and Site Management of Reconductoring of Transmission Lines Projects (NTP-TR5G and NTP-TR5E).

 

The Nigeria Electricity Transmission Project (NETAP) seeks to redress certain deficiencies and operational constraints of the Nigeria Power Transmission System to allow the efficient dispatch and transmission of Power in the National Grid through additional transmission capacity.  In particular, it will complement efforts under-way for both emergency and long-term measures now being taken to increase generation.

 

Part of the NETAP investment component includes the contracts for the Engineering Supervision and Site Management of the reconductoring of Transmission Lines.  An Engineering consultancy service is therefore required to manage and supervise the works covered under the contracts as mentioned above.

 

The Project management and supervision Consultant to be engaged by TCN will assist its project implementation Unit (PIU) among others in the overall supervision of the 132kV Transmission Line reconductoring Projects Management and Supervision. The Consultant will as well assist the Project Management Unit of TCN in the procurement and inspection of all necessary line material needed for the full implementation of the Project, Construction coordination, quality assurance, safety compliance and testing/ commissioning of the line project.

 

1.1       Status of the Project

 

The TCN carried out studies on its existing transmission network, and some lines were identified as being old and weak and needed uprating and upgrading for a stable and reliable power supply. The lines under consideration are:

 

S/N

TRANSMISSION LINES

LOCATION

1.

Kumbotso – Hadejia 132kV Single Circuit Transmission Line (165km)

North West

2.

Kumbotso – Kankia 132kV Single Circuit Transmission Line (100km)

North West

3.

Benin – Irrua 132kV Single Circuit Transmission Line (81km)

South-South

4.

Irrua – Okpella 132kV Single Circuit Transmission Line (65km)

South-South

5.

Okpella – Okene 132kV Single Circuit Transmission Line (43km)

North-Central

6.

Okene – Ajaokuta 132kV Single Circuit Transmission Line (52km)

North- Central

7.

Port Harcourt Main – Port Harcourt Town 132kV Double Circuit Transmission Line (6km)

South-South

8.

Alaoji – Abba Town 132kV Single Circuit Transmission Line (8km)

South East

9.

Osogbo – Offa – Omuaran – Ganmo – Ilorin 132kV Single Circuit Transmission Line               (150km)

South West

10.

Onitsha – Oji River 132kV Single Circuit Transmission Line

South East

 

11.

 

Gombe – Biu – Damboa – Maiduguri 132kV Single Circuit Transmission (356km)

 

North-East

 

 

The summary of the contracts NTP-TR5G and NTP-TR5E which are in four (4) lots which shall be managed and supervised by the Consultant under the project assignment as below:

 

               NTP-TR5G  (LOT 1)

                        Kumbotso – Hadejia 132kV SC Transmission Line

                        Kumbotso – Kankia 132kV SC Transmission Line

 

               NTP-TR5E (Lot 1)

                        Benin – Irrua 132kV SC Transmission Line

                        Irrua – Okpella 132kV SC Transmission Line

                        Okpella – Okene 132kV SC Transmission Line

                        Okene – Ajaokuta 132kV SC Transmission Line

 

               NTP-TR5E (Lot 2)

                        Port Harcourt Main – Port Harcourt Town 132kV DC Transmission Line                                  Alaoji – Abba Town 132kV SC Transmission Line

                        Osogbo – Offa – Omuaran – Ganmo – Ilorin 132kV SC Transmission Line

                        Onitsha – Oji River 132kV SC Transmission Line                                                   

               NTP-TR5E (Lot 3)

                        Gombe – Biu – Damboa – Maiduguri 132kV SC Transmission

 

 

2.0       OBJECTIVE OF THE TERMS OF REFERENCE

 

The objective of this TOR is to seek the services of a qualified and experienced firm that is specialized in power system development and operations with vast experience in the Design and Construction of  High Voltage Transmission Line (132kV and above) to be engaged to assist TCN’s Project Management Unit (PMU) in the implementation of the Transmission Line reconductoring project.

 

2.1       The objective of the Consultant’s assignment is to assist in the management and supervision of works required in the implementation of the Contract for the reconductoring of 132kV Transmission Lines under NTP-TR5G and NTP-TR5E contracts.

 

Generally, the Consultant shall work hand in hand with the Employer’s Engineers in the execution of all aspects of the assignment.  The Employer must endorse certifications made on documents and drawings by the Consultant.

 

2.2       During the execution of this assignment, the Consultant will be required to take inputs from a broad field of expertise covering the following:

 

  • Project Administration and Control.
  • Supervision of the Performance of the Contractors handling NTP-TR5G and NTP-TR5E contracts.
  • Supervision of installations up to commissioning and handing over of works under NTP-TR5G and NTP-TR5E contracts.
  • Training of TCN staff and transfer of skills.

 

2.3       The Consultant’s works shall be executed per requirements of the tender documents for reconductoring of 132kV Transmission Lines under NTP-TR5G and NTP-TR5E.

 

2.4       The Consultant will be required in the course of carrying out this assignment to coordinate and monitor all other project works associated with the contracts NTP-TR5G and NTP-TR5E, which shall be executed concurrently at the affected sites.

 

2.5       The Consultant shall perform his assignment until the end of defects liability period of twelve (12) months after the provisory take-over from the Contractors of the Project works carried out under NTP-TR5G and NTP-TR5E contracts.

 

 

 3.0      SCOPE OF SERVICES

 

The Consultant to be engaged shall provide overall management on all aspect of works/services for the design, manufacturing, testing, supply, delivery to site of GzTACSR conductors, Composite Insulators and OPGW, including all associated fittings, complete composite insulator sets, phase and earth-wire tension and non-tension joints and clamps and vibration dampers. The assignment will also involve the testing and the rehabilitation of existing towers and improvement of earthing where necessary. It will also require the undertaking of erosion control on existing towers where necessary.

 

The scope of works covered under NTP-TR5G and NTP-TR5E contracts which are in four (4) lots are as follows:

 

  • Project Management and Supervision

 

The Consultant shall:

  • Manage overall liaison between the Employer and the Contractors
  • Review and approve all the engineering drawings, diagrams and documents submitted for approvals on the Contracts for NTP-TR5G and NTP-TR5E project works in accordance with contractual and engineering specifications
  • Assist the Employer in any issues relating to Contract, especially compliance with the matters with a performance bond, insurance, and claims; and to prepare certain documents that may be required by the World Bank.
  • Lead progress and site meetings prepare agendas and write minutes of meetings, periodical follow-up reports and take-over reports.
  • To oversee follow-up, periodical updating and coordinate work schedules of the contractors handling all the projects in the four transmission lines.
  • Prepare monthly, quarterly progress and project completion report for the contracts per the World Bank requirements.
  • Verify quantities of works performed and shall certify invoices issued by contractors in conjunction with the Employer’s Engineer on the Project.
  • Make sure that supplies and works planning to comply with schedules in the actual Contract supply and work progress on-site following contract Schedule and determine where necessary, suggest measures to be taken to speed up the works.
  • Examine any change/deviation of specifications or variations in the scope of work as stipulated in the tender documents which are proposed by the Contractors and make recommendations to the Employer for approval of the change of specifications and variation of scope with the resultant cost adjustment.
  • Follow-up damage reports and ensures that damaged materials are subsequently replaced.
  • Check and approve the Contractors quality assurance applied by all the contractors during works execution
  • Monitor the implementation of social, environmental, health and safety standards and requirements as specified in the ESMPs, and RAPs (if applicable) and monitoring any instance of gender-based violence, and reporting non-compliance to the owner and proposing mitigation measures
  • Issue Provisional Acceptance Certificate after commissioning and the Final Acceptance Certificate after the expiration of the Guarantee Period.

 

  • Technical Control of Designs

 

The Consultant will verify if calculations and hypotheses used, construction drawings, diagrams and documents submitted for his approval are worked out following contractual and engineering specifications.  Emphasis shall be put on the following tasks:

 

  • Design and manufacture of the fittings – parts/accessories shall be such that they shall be completely compatible with the GzTACSR conductor – a high-temperature low sag (HTLS) type conductor and smoothly fitted with the existing fittings/parts not to be replaced on the existing Transmission Line.
  • Inspection of shipped materials before their use
  • Checking the final technical as-built documentation prepared by the Contractors.

 

  • Receipt of the equipment in factory and supplies to the site

 

The Consultant shall:

 

  • Verify conformity of equipment with contract specifications
  • Examine any change/deviation to the contract specifications that might be proposed by the Contractors
  • Check and approve the Contractor’s Quality Assurance Plan
  • Check and approve factory testing and inspection program in factory proposed by the Contractors/Suppliers
  • Ensure that equipment has undergone testing as requested in the Contract and that the contractor submits test certificate to the Consultant for approval.
  • Plan and supervise all Factory Acceptance Test (FAT), and all tests carried out by the contractors at site and sign such test reports.
  • Participate in “routine testing” for major equipment together with the Employer’s Engineer at the manufacturer’s works
  • Regularly check the program for production and delivery to the site of the main equipment to ensure timely completion of the Contract according to schedule.
  • Review the operation and maintenance manuals provided

 

At the commencement of Project, the Employer shall specify to the Consultant,     a list of the primary materials that must be inspected by them in the factory             together with the Employer’s Engineers.

 

3.4       Pre-Commissioning Tests and Commissioning Upon Works Completion

 

On works completion, the Consultant shall supervise the pre-commissioning tests and the final commissioning of all works.  The Employer’s Engineers shall assist the Consultant.

 

The Consultant shall establish with each of the contractors and with approval of Employer, commissioning, and testing procedures for each of the concerned Project defining:

 

  • The role and the responsibility of each of contracting parties.
    • Tests to be carried out for the projects
    • The detailed program of the commissioning and testing of works in accordance with the contractor implementation program.
    • The conditions of commissioning such as the state and the availability of the electric network, interface with other works in progress
    • Environmental, health and safety standards and procedures to be adopted.
    • Planning of outages required for pre-commissioning, spot checks and other site tests

During commissioning, the Consultant shall also:

 

  • Coordinate all testing to be done by the contractors, approve the procedures and results announced.
  • Ensure that the contractors conform to the quality and methodology required for the presentation of the commissioning test reports
  • Approve the commissioning test report prepared by the contractors
  • Ensure that the commissioning test report shall be signed jointly by the Consultant, the Client and the contractor
  • Collect a set of documents of the recorded commissioning test results.
  • Issue Interim Work Completion Certificate for the Project works carried out under NTP-TR5G and NTP-TR5E

 

After completion of commissioning works, the Consultant shall have to:

 

  • Verify and approve the “as-built” drawings provided by the contractors
  • Examine and confirm the adequacy of the operating and maintenance manuals provided by the contractors.
  • Issue Final Work Completion Certificate for the Project works carried out under NTP-TR5G and NTP-TR5E

 

3.5       Transfer of Know-How

 

The transfer of know-how shall be carried out at different levels:

 

  1. Transfer of know-how through the work on-site of Employer’s engineers working with the Consultant’s experts.
  2. Transfer of know-how through training sessions or lectures conducted.
    • The Consultant’s Engineers on-site would ensure active collaboration and participation of TCN engineers throughout the project assignment.
    • A well-organized two (2) week Classroom Training of twenty (20) Employer’s staff on all aspects of Project Management and Contract Administration
    • Computerized Transmission Line Design (PLS-CADD Hands-On Training)
    • Use of LiDAR to improve reliability using PLS-CADD­­­ (thorough examination of PLS-CADD to improve reliability and utilization, including reconductoring and line re-rating)

 

The objective of the capacity training is to build and reinforce the capacity of the Client in implementing projects of such nature. Other key areas where the training of the Clients PIU Personnel should cover include the use of project planning software for effective monitoring of projects, project scheduling, change management, managing project cost.  In addition, the Consultant may propose in his proposal other relevant areas of learning for consideration by the Client. 

 

3.6       Defects Liability Period (DLP)    

 

The Defect liability period (DLP) is planned to be twelve (12) months after provisional take-over. During this period, the Consultant shall from his head office answer questions via e-mail and fax correspondence from the home office.

 

By the end of the DLP, the Consultant and his specialists shall be present for the final take-over of the completed Project works carried out under NTP-TR5G and NTP-TR5E Contracts separately.  The Consultant shall be consulted on matters related to the execution of the two contracts throughout the DLP.

 

4.0       REQUIREMENTS FOR THE FIRM

 

            The firm is required to possess the following:

  1. The firm’s broad experience and overall competence, including the relevance of the applicant firm’s area of core business to the assignment envisaged.
  2. Firm’s good reputation, strong institutional capacity, and capability in terms of technical expertise, managerial expertise, quality management system, number of technical staff and financial soundness.
  3. The extent of specific experience in assignments of similar nature and complexity in construction management and supervision of Transmission Lines (132kV and above), including review of design, supervision of EPC contractor’s quality, schedule, environmental, safety and health compliance, verification of equipment quality, certification of variation orders etc. (relevant completion certificates and letters of recommendations from former clients to be provided if available);
  4. The extent of specific experience in assignments of similar nature and complexity in construction management and supervision of transmission lines in the sub-Africa region would be a plus.
  5. Evidence and certification of quality and environmental management

 

5.0       THE CONSULTANT TEAM

 

The Consultant shall set up his organization team complying with the project needs, and all positions will be held by qualified and skilled staff. The Consultant shall work jointly with the Client’s PIU.

 

The Consultant shall provide experienced personnel to carry out the assignment throughout the project management and reconductoring supervision services following task/requirement of the Project. These personnel shall be supported by other experts on call (who shall visit the sites as need be).

 

The Consultant shall provide staff on-site for the overall management, procurement/inspection, construction coordination/quality assurance and testing/commissioning of the facilities on the Project as may be required.  The Minimum qualifications for key staff of Consultant are as follows

 

5.1       Requirements of Key Personnel

 

The team must have suitably qualified personnel to fill the relevant under-listed positions as detailed in the following table.

 

 

 

 

 

Personnel

Total Experience (Years)

In Similar Works (Years)

Number of Key Staff required

Project Manager

15

5

1

Asst. Project Manager

12

5

1

Transmission Line Design Expert

15

5

1

Quality Assurance Expert

10

5

1

Lines Engineer

10

5

5

Civil Engineer

10

5

3

HSE specialist

10

5

5

Protection Engineer

10

5

1

Commissioning Engineer

10

5

1

 

               The Project Manager (Electrical Engineer)

               Must have the following requirements

  • a minimum of 15 years general experience in Transmission Lines works
  • MSc Degree
  • A minimum of 10 years of documentary experience in successful project management and contract supervision of similar nature in developing countries
  • Must always be present in Nigeria for the duration of the project, unless otherwise explicitly agreed

 

               The Assistant Project Manager (Electrical Engineer)

               Must have the following requirements

  • a minimum of 12 years general experience in Transmission Lines works
  • MSc Degree
  • A minimum of 10 years of documentary experience in successful project management and contract supervision of similar nature in developing countries
  • Must always be present in Nigeria for the duration of the project, unless otherwise explicitly agreed

 

Other Key Staff as mentioned above must all have a minimum of 10 years’ experience in the construction and/or supervision of turnkey Transmission Lines project of similar nature.

 

Evidence of registration with relevant professional bodies is required in all the cases. A passport photograph of each candidate should be attached.

 

The Consultant shall provide experienced personnel to carry out the assignment throughout the project management services per task/requirement of the Project. These personnel shall be supported by other experts on call (who shall visit the sites as need be).

 

At his head office, the Consultant must have a team in Transmission Lines projects who shall assist the personnel on-site as the need arises.

 

6.0       REPORTS AND TIME SCHEDULE

 

The Consultant shall be required to submit Project monthly, quarterly and completion reports for works carried out under NTP-TR5G and NTP-TR5E Contracts following time schedules.

 

6.1       Project Monthly Report

 

The Consultant shall send a monthly report for each of the contracts to the Employer on the progress of work, including minutes of meetings if the regular site meetings were held for the projects. This report shall be issued in five (5) copies with one (1) electronic copy.

 

6.2       Quarterly Progress Report

 

The Consultant shall send a quarterly report for the projects on the progress of works including the technical execution of the Project, and on the implementation of the environmental measures, the effectiveness and the response of the measures adopted and proposals to amend same if the environmental measures implemented are not given desired results.

 

The Consultant shall also include in the quarterly progress report, financial reports on expenditure & payments made to contractors.

 

This report will be issued in four (4) copies with one (1) electronic copy.

 

6.3       Project Completion Report for NTP-TR5G and NTP-TR5E

 

The Consultant shall prepare a draft Project Completion Report not later than two (2) months after completion of the contracts works.  This report shall include technical and financial aspects and shall be provided first in six (6) copies with soft copies.  The Consultant shall submit for approval to the Employer the texture of this report.  The Employer shall then use one month to make observations which will be incorporated into the draft report before a final version is issued in ten (10) copies together with electronic copies.

 

After the end of the Defects Liability Period, and after final take-over, the Consultant shall update the Project Completion Report that shall become the Final Completion Report which shall be provided in Six (6) copies with electronic copies.

 

7.0       DEADLINE AND LOCAL SERVICES

 

The works required to be carried out under NTP-TR5G and NTP-TR5E Contracts until provisory take-over is estimated to be twenty-four (24) months for the contracts.  The Defects Liability Period shall last for twelve (12) months for the contracts after which the Consultant’s services shall be due for completion.

 

 

 

8.0       FACILITIES TO BE PROVIDED BY THE CONSULTANT

 

8.1      Office and Residential Accommodation

The Consultant shall be responsible for the provision of both office and residential accommodation for their staff.

 

8.2     Transportation

The Consultant shall be responsible for their transportation during the Project.

 

9.0       FACILITIES TO BE PROVIDED BY EMPLOYER

 

The Employer shall provide the following to the Consultant:

 

  1. Drawings and documents, such as previous studies, design reports, design calculations, network calculations, etc. established by TCN, the Supplier or other Consultants, before commencement of the Consultant’s works which may be required for the performance of the services if available.
  2. Assistance in obtaining permission, licenses for telephones, working permits, residence visas, re-entry and exit visas for the Consultant’s staff and families, respectively.
  3. Assistance in facilitating and expediting customs procedures in connection with importation of equipment and materials necessary for the Consultant’s services and for the household of the Consultant’s key staff and families.

 

10.0     EFFORT LEVEL

 

The expected effort level required for the assignment is 158 man-months

11.0SELECTION METHOD

Consultant shall be selected through the Quality and Cost Based Selection (QCBS) in accordance with the procedures set out in the World Bank’s “Procurement Regulations for IPF Borrowers”January 2017, revised November 2017 and August 2018.

 

12.0COPYRIGHT AND OWNERSHIP

All raw and finished materials would be owned and copyrighted. Permission to use materials by the Consultant for other projects shall require the written permission of the Employer, and the Consultant shall maintain in strict confidence all information received from the Employer concerning imports, financial records and nature of the business.

 

 

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