Khimti-Dhalkebar 220 kV Transmission Line Project

Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

1. GENERAL TECHNICAL SPECIFICATIONS

1. General

1.1 General Information

Government of Nepal has received a credit/grant from the International Development

Association (IDA/WB) towards the cost of Part C: Transmission & Distribution
Component, Power Development Project, and it intends to apply part of the proceeds of this
credit/grant to payments under the contract for Package A2 - Supply and Installation of 132
kV Bay Extensions at Khimti and Dhalkebar.

The main components of the Package A2 under Khimti-Dhalkebar 220 kV Transmission

Line Project (the Project) are:

a) Construction of a 132 kV line bay at Khimti switchyard

b) Construction of a 132 kV line bay at Dhalkebar substation

The 220 kV (twin bundle) transmission line, initially charged at 132 kV level, shall emanate
from the switchyard of Khimti Hydro Electric Power Station and shall terminate at the
switchyard of Dhalkebar 132 kV sub-station. The transmission line shall be passing through
hilly & mountainous areas.
The other transmission line contractor will construct the above 220 kV transmission line
completely including dead end towers on either end. Stringing will also be carried out by the
other contractor from dead end towers to terminal points/gantry structures.

1.2 Scope of Work

The scope of works under this Contract includes design, manufacture, shop test,
transportation & delivery to each site, assembly, erection, installation, all civil works,
field testing, commissioning and remedying of defects within warranty period, of all
equipment necessary for complete operation of the line bays in the substations. The
Bidders are encouraged to propose standard equipment of state-of-the-art technology to
the extent possible, as long as it meets or exceeds the requirements of this Specification.

However, the equipment to be supplied shall conform to the specifications and be of

renowned brands (manufacturers) as mentioned below:

S. Equipment Manufacturer
No.
1. SF6 Circuit Breaker ABB/Hitachi/GE/Mitsubishi/LG/Fuji/Siemens/Alstom
2. Relay ABB/Siemens/Alstom/Fuji/Reyrolle Protection
3. Instrument Transformer ABB/Hitachi/GE/Mitsubishi/LG/Fuji/Siemens/Alstom
4. Energy meter ABB/Landis & Gyr/Schlumberger/Fuji/Siemens
5. PLCC ABB/Siemens/NERA
Communication/RTU

Volume II Sec 1-1

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

In case each equipment item is from different manufacturer, these items shall be intra-
compatible.

The Contractor shall be fully responsible for supply, installation and commissioning of
line bay equipment necessary for complete operation with the existing system. New
equipment to be supplied under this Contract shall be compatible with the existing ones
and the Contractor shall be fully responsible for completing the specified works. The
brands of existing line bay equipment used in Khimti switchyard, for your information,
are as follows:

Protection relays and switchgear equipment used in the existing substation at Khimti
S.No. Item Descriptions Make
1. Line protection relays (O/C, E/F, Distance, Over- ABB, Sweden
voltage, Synchronizing)
2. Energy Measurement ABB, Sweden
3. SF6 Circuit Breaker ABB, Sweden
4. Isolator/Disconnector ABB, Sweden
5. Voltage Transformer ABB, Sweden
6. Current Transformer ABB, Sweden
7. Lightning Arrestor ABB, Sweden
Note: The type and designated number of relays shall be provided within 30 days of
contract signing.

The Contractor shall be fully responsible for supply, installation and commissioning of
communication equipment, including RTUs, necessary for complete operation with the
NEA SCADA system. New communication and RTU equipment to be supplied under
this Contract shall be compatible with the existing ones and the Contractor shall be fully
responsible for complete interfacing between the existing and the new system. The
interfacing works include the integration of the relevant data (associated with the scope
of this tender) into the SINAUT Spectrum of the Load Dispatch Center (LDC)/NEA by
necessary addition/modification and parameterization.

The major works involve design, supply, storage, construction & installation and testing
& commissioning of the following on turnkey basis:

A. Extension of 132 kV bay at Khimti switchyard with:

(a) One 132 kV line bay with switchgears

(b) Lattice type steel internal-gantry structure and bus bars (single bus-bar
system)
(c) 132 kV power cables including terminations.
(d) Lattice type steel take-off structure for 132 kV cable terminations at 220 kV
dead end tower
(e) Steel structures for bus-bars and various equipment supports
(f) Control and Relay panel for 132 kV line
(g) All necessary power and control cables
(h) Installation of PLC equipment at the Khimti end of the 220 kV line (initially
charged at 132 kV); Testing commissioning of PLCC link between Khimti
and Dhalkebar substations
(i) Communication and all necessary equipment including RTU, to establish
such schemes as data/voice communication, signaling etc. between, Khimti,

Volume II Sec 1-2

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

Dhalkebar and Hetauda substations, as required by NEA, with complete

interfacing and integration with the SINAUT Spectrum of LDC/NEA
(j) Extension of substation earthing and connection of new equipment to the
grounding grid
(k) Site preparation and all necessary civil works including equipment
foundations, cable trenches, drainages, etc.
(l) 48 V Battery and battery charger
(m) Earth mast with overhead protective shield wire
(n) Outdoor lighting
(o) Necessary fences
(p) All other necessary works

The line bay under the scope of this Bid shall be constructed at the end of the
switchyard to the south as shown in the switchyard layout drawing. The 132 kV
HV cables shall connect the overhead line (220 kV to be initially charged at 132
kV) to the bus bars.

The required DC and AC auxiliary supplies shall be taken from the existing
distribution system. The Contractor shall carry out necessary studies of the
existing distribution system and submit its plan for Employer's approval.

Extension works of the existing bus-bar shall be specially expedited soon.

B. Extension of 132 kV bay at Dhalkebar substation with:

(a) One 132 kV line bay with switchgears

(b) Lattice type steel take-off structure, internal-gantry structures and bus bars
(double bus-bar system)
(c) Steel structures for bus-bars and various equipment supports
(d) Control and Relay panel for 132 kV line
(e) All necessary power and control cables
(f) Installation of PLC equipment at the Dhalkebar end of the 220 kV line
(initially charged at 132 kV); Testing commissioning of PLCC link between
Khimti and Dhalkebar substations
(g) Communication and all necessary equipment including RTU, to establish
such schemes as data/voice communication, signaling etc. between, Khimti,
Dhalkebar and Hetauda substations, as required by NEA, with complete
interfacing and integration with the SINAUT Spectrum of LDC/NEA
(h) Extension of substation earthing and connection of new equipment to the
grounding grid
(i) Site preparation and all necessary civil works including equipment
foundations, cable trenches, drainages, etc.
(j) 110 V Battery and battery charger
(k) 48 V Battery and battery charger
(l) Overhead protective shield wire
(m) Outdoor lighting
(n) All other necessary works

All works described herein and other works necessary to complete the job for proper
coordination and operation, even if not stated, shall be within the scope of the Contractor’s
work and the cost of such works shall be considered to be included in the bid price.

Volume II Sec 1-3

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

The Contractor shall provide spare parts and tools for the substations as specified in this
Specification, furnish qualified supervision and construction personnel for the installation,
testing, commissioning and remedying defects within warranty period and checking out of
the equipment necessary to complete the scope of work as mentioned above and detailed in
the Price Schedule. The work shall be performed in close cooperation with the Employer.

Coordination of the substation works with the installation of others shall be the responsibility
of the Contractor. The Employer will furnish the information needed to coordinate the
substation works with other works.

Locally available goods, construction materials including asphalt, fuel, lubricating oil,
cement, timber, iron and steel goods, etc. shall be procured locally.

2. Conditions of Service

2.1 All plant and equipment supplied under this Contract shall be suitable for the following
system and site conditions:

(a) System electrical parameters

Rated service voltage 132 kV

Highest system voltage 145 kV
Impulse voltage withstand level 650 kV
Number of phase 3
Frequency 50 Hz

(b) Climatic conditions

All plant and equipment supplied under the Contract shall be entirely suitable for the
climatic conditions prevailing at site.

Between June and August low-lying areas are subject to flooding.

All structures shall be designed with the seismic factor of 0.15g.

Atmospheric pollution is low and special insulator design or washing is not required.

Maximum ambient shade temperature 50 degree C

Minimum ambient shade temperature 0 degree C
Annual average temperature 32 degree C
Maximum wind velocity for structure design purpose 34.4 m/sec
Rainfall 2,000 mm/annum
Monsoon season June-August
Relative humidity maximum 100 %
minimum 20 %
2000 -100 MSAL
No ice or snow expected -
Atmospheric pollution Light
Isokeraunic level (thunderstorm days) 50

Volume II Sec 1-4

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

The information provided herein is given solely for the general assistance to Bidders. No
responsibility for it will be accepted, nor will any claim based on the information be
considered.

The Bidder is advised to survey the sites covered under this Contract to acquaint itself with
site conditions.

2.2 The Contractor shall be responsible for surveying, boring, geologic and subsoil conditions
for all foundations, and for the precise location of works in the project.

2.3 The Contractor shall locate and record on the construction drawings, all interfacing utility
lines or other obstructions. Damage to existing line equipment and structures shall be
repaired by the Contractor at its expense.

2.4 Transport Facilities and Transportation to Site

Khimti switchyard is located at Kirnetar and Dhalkebar substation is located along the East-
West highway. Khimti switchyard is about 175 km away from Kathmandu. Both the
substation sites are easily accessible round the year. However, the Employer shall not be
responsible for the condition of the roads and the transport. Transportation of the material to
the work sites shall be the Contractor's responsibility.

3. Codes and Standards

3.1 Applicable Standard

All equipment, materials, fabrication and tests under these specifications shall conform to the
latest applicable standards, manuals and standards contained in the following list or to
standards, manuals and specifications approved by the Employer. Any details not
specifically covered by these standards and specifications shall be subject to approval of the
Employer.

ACI American Concrete Institute

AISC American Institute of Steel Construction
ANSI American National Standard Institute, Inc
ASCE American Society of Civil Engineers
ASME American Society of Mechanical Engineers
ASTM American Society for Testing Materials
AWS American Welding Society
BS British Standard Institution
EEI Edison Electric Institute
IEC International Electrotechnical Commission
NEMA National Electric Manufacturers Association
IEEE Institute of Electrical and Electronics Engineers
ITU-T International Telecommunication Union

3.2 All plants and equipment supplied under this Contract shall conform to or be of higher
quality than the latest applicable standard.

Volume II Sec 1-5

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

3.3 If the Specifications contained in this Contract conflict in any way with any of the reference
standards, the Specifications shall take precedence. If there are conflicts between different
specified reference standards covering the same material or equipment, the standard, which
will provide the highest quality and most suitable application, as determined by the
Employer shall prevail.

3.4 References to standards or to equipment of a particular manufacturer shall be regarded as

followed by the words "or equivalent", except as otherwise noted. The Contractor may
propose alternative standards, or equipment, which shall be equal to those, specified unless
the system requires specific equipment, as mentioned in the Specification, to ensure
compatibility. If the Contractor for any reason proposes alternatives to or deviations from the
above standards, or desires to use equipment not covered by the above standards, the
Contractor shall state the exact nature of the change, the reason for making the change, and
shall submit, for their approval. The submittal shall include relevant specifications of the
equipment in the original language, and in case that these specifications are written in
language other than English, the English version shall be attached and shall govern. The
decision of the Employer in the matter of equality will be final.

3.5 Notwithstanding the above, if the Specification calls for equipment of specific
manufacturers, only those manufacturers, which are specified, shall be acceptable to the
Employer. Also, manufacturers having collaboration with the specified manufacturers will
not be accepted.

4. Assistance by the Employer

The Employer will give assistance to the Contractor as much as possible in the following
manner; this however will be without any obligations, legal or otherwise.

(a) Facilitating access to all locations involved in carrying out the works
(b) General guidance to the Contractor for all negotiations with the Authorities in Nepal

5. Variation in Quantities of Work

The Quantities listed in the Schedule of Prices represent the estimated quantities for bid
purpose only. The Contractor shall carryout detail design and shall submit final bill of
quantity for approval within 120 days from the effective date of Contract. The actually
required quantity may vary from the quantity as listed in Price Schedule. The Contractor
shall agree to make no claim for anticipated profits or for alleged losses because of any
difference between the quantities actually furnished and installed and the estimated
quantities as indicated in these Bidding Documents.

6. Tender Drawings

Typical drawings are to be submitted with the bid, showing all essential details of supply
and construction of various supplies. The drawings furnished by the Employer with the
Bidding Document are preliminary only and the Contractor shall investigate the sites and
design as per actual site requirement without any additional cost to the Employer.

Volume II Sec 1-6

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

The following drawings must be prepared by Bidders and included in the copy of their
bids for each of the substations:

- Schematic electrical diagram of substations (including interconnection with

existing system).
- Layout of equipment in control room.
- Plan and elevation of switchyards.
- Details of relay and control panel.
- Communication system (PLCC)
- General layout of switchyard

The successful Bidder will be required, at the time of signing of the Contract, to supply
additional copies of the above drawings as may be selected by the Employer. These
drawings, together with such drawings originally issued with the Bidding Documents will
then form part of the Contract Documents and be signed both by the Employer and the
Contractor for identification purposes.

7. Contract Drawings and Documents for Approval

7.1 Prior to commencement of the work, the Contractor shall submit detailed design
drawings and data to the Employer for approval. Should the Employer direct that
modifications be made in order to satisfy the requirements of the Specifications, the
Contractor shall submit revised drawings for approval. Alteration in the Contract Price
shall not be allowed by reason of the drawing modifications.

7.2 The Contractor shall prepare and furnish to the Employer such drawings, calculations, and
data on materials and equipment (hereinafter in this provision called data) as are required for
the proper control and completion of the work. This shall including but not be limited to
those drawings, data and calculations specifically required elsewhere in the Technical
Specifications.

7.3 The Metric System shall be used and notations shall be in English. Drawings, calculations,
and data shall be furnished as specified. All drawings and data will be subject to review by
the Employer for conformity with the Technical Specifications and Contract Drawings and
upon meeting review requirements shall become the property of the Employer.

7.4 The Contractor shall submit detailed drawings, instructions and maintenance books, and
parts lists with recommended stock quantities for the equipment furnished, prepare and
submit detailed engineering, design and construction drawings pertaining to all mechanical
and electrical equipment and installations in substations. The drawings to be furnished by the
Contractor shall include, but not be limited, to the following:

(a) Single line and three line diagrams

(b) General layout and section plans of substations
(c) Electrical layout and elevations, plans and details
(d) Structural erection and fabrication drawings
(e) Substation grounding calculation, plans, elevations and details
(f) Foundation layouts, plans and elevations indicating top of foundations, details for
anchor bolt installation, plus all data required for civil works

Volume II Sec 1-7

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

(g) Cable trench, duct and conduit layout plan, elevation and details
(h) Single line diagram for AC and DC station service power supply
(i) Substation lighting and convenience outlet plan, elevation, and details
(j) Substation electrical equipment layout, plan, elevation and details, including cable
trench, cable tray, wire gutters, conduits, and specifying location and installation
details for equipment furnished. The Contractor shall be responsible for determining
the elevations and other details of the existing equipment, structures, etc.
(k) Detailed material list for the substation
(l) AC and DC diagram for control, metering, relaying, communication, alarm, etc.
required to describe in detail the operation of all systems in the substation. Wire
numbers and terminal numbers for each device shall be clearly marked on all AC and
DC elementary and schematic diagram
(m) Interconnection diagram for all substation equipment, AC and DC station service
equipment and all building equipment
(n) Detailed cable schedule list and cable summary, specifying cable identification
number, routing and length of the cable for the substation
(o) Switchgear and panel-board front and rear elevation drawings showing dimension
and identification of each device and complete nameplate schedule
(p) Calculation and coordination for selecting operation of protection relays
(q) Instruction books, spare parts lists, material lists and any other documents pertaining
to the substation and required for construction, operation, maintenance and repair
(r) Communication system drawings
(s) Internal and outdoor lighting
(t) Testing procedure of each equipment for repairing and overhauling

All the instructions, manuals and relevant information in the drawings must be in English.

Unless otherwise specifically mentioned, the drawings and data pertaining to the Works shall
be according to this clause.

All drawings shall be prepared in AutoCAD and the Contractor shall submit 3 sets of such
electronic drawing files in Compact Disc to the Employer/the Consultant.

The Contractor shall submit the drawings and data to the Employer for approval in the
following manner and designated deadlines.

For supply of equipment and/or installation work

Item No. of Deadline & Remarks
Copies
Proposed work program 3 Within 30 days from the date of signing of
Contract.
Principal equipment drawings 3 Within 90 days from the date of signing of
for approval Contract.
Principal installation drawings 3 Within 120 days from the date of signing of
for approval Contract
.
Revised drawings for approval 3 Within 30 days after receiving drawing for
revision.
Final drawings with 5 Within 30 days after receiving approval

Volume II Sec 1-8

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

reproducible copies
AutoCad files of Final 2 Within 30 days after receiving approval
Drawings in Compact Disc
Schedule of manufacturing and 2 Within 30 days from the date of signing of
transportation Contract
Plan for shop tests 2 Not less than 45 days before testing
Results of shop tests for 4 Upon completion of tests
approval
Records of shop tests 4 Upon approval of results of shop tests
Plan for field-tests 2 Not less than 15 days before testing
Report for field tests 4 Within 7 days after completion of each test
As-built drawings 5 Within 30 days after completion of
installation work
AutoCad file of as-built 3 Within 30 days after completion of
drawings installation work
Instruction manuals and 5 30 days after shipment of Equipment
drawings with reproducible
copies for installation

For Civil Works

Item No. of Deadline & Remarks
Copies
Detail construction schedule & 3 Within 30 days from the date of signing of
method Contract
Drawing for approval (principal 3 Within 90 days from the date of signing of
drawings for construction) Contract.
Revised drawings for approval 3 Within 15 days after receiving drawings for
revision
AutoCad file of approved 2 Within 15 days after receiving drawings for
drawings in Compact Disc revision
Reports of Field Tests 4 Within 7 days after completion of each test
As-built drawings 5 Within 30 days after completion of
construction works
AutoCad files of as-built 3 Within 30 days after completion of
drawings in Compact Disc construction works

Others
Item No. of Deadline & Remarks
Copies
Monthly Progress Reports with 3 By 10th of following month
photographs
Packing list (copy) 5 At each shipment
Invoice (copy) 5 At each shipment
Bill of lading (copy) 5 At each shipment
Certificate of origin (copy) 1 At each shipment

In addition to the general requirements mentioned above, the following shall also be
observed for the Civil Works:

Volume II Sec 1-9

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

I. Work Schedule Within 30 days after signing of the Contract

II. Approval drawings for:

A. Switchyard

General Layout Plan 3 copies within 30 days after signing of the

contract

Foundation Layout Plan 3 Copies within 30 days after approval of

General Layout Plan

Detail Structural Design/calculation 5 Copies within 30 days after approval of

Equipment foundation /Structure Foundation Layout Plan

Detail Working Drawing of 5 Copies within 30 days approval of

Equipment foundation /Structure Structural design

III. Modified approval drawings 3 Copies Within 15 days from receiving

drawings for revision

IV. Final drawings 5 Copies Within 30 days from receiving

approved revised drawings

V. Plan of shop tests and field-tests Not less than 15 days before test

VI. Report of shop tests and field tests 3 copies Within 15 days from completion of
tests

VII. Data on materials and equipment Not less than 45 days before procurement
(3 copies)

VIII. As built drawings (5 copies) 30 days before issuance of Operational

Acceptance Certificate

IX. Final drawing 30 days before issuance of Operational

Acceptance Certificate

XI. Monthly physical progress report By 10th of following month

XII. Photographs showing progress of works Attached in each monthly Physical Progress
Report

7.5 Drawings: Titles, scales and Sizes

Volume II Sec 1-10

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

The title of the drawing, Contract Number, the signature of the Contractor's engineer and
the date shall appear in the bottom right-hand corner of each drawing in the following
format:

Nepal Electricity Authority

Transmission and System Operation
Transmission Line/Substation Construction Department
Khimti-Dhalkebar 220 kV Transmission Line Project

Contract No…….
Name of the Substation …….
Item No…….
Brief Description ……………

In general the scales of the drawings shall be 1:200. The Contractor, however, can
prepare and submit drawing in any other appropriate scales with the prior approval of the
Employer. The Contractor shall use any one of the following sizes for the preparation of
drawings as appropriate:

A0 841 x 1189 mm (33.11 x 46.81 in )

A1 594 x 841 mm (23.39 x 33.11 in )
A2 420 x 594 mm (16.54 x 23.39 in )
A3 297 x 420 mm (11.69 x 16.54 in )
A4 210 x 297 mm (8.27 x 11.69 in )

7.6 Employer’s Approval

The Employer will approve each drawing within twenty-eight (28) days after receipt at
his office. One print of each of the drawings submitted for approval will be returned by
the Employer or Employer’s Representative, marked either "APPROVED",
"APPROVED EXCEPT AS NOTED", or "RETURNED FOR CORRECTION".

(a) The notations "APPROVED", or "APPROVED EXCEPT AS NOTED" will

authorize the Contractor to proceed with the manufacturing drawings, subject to
the corrections, if any indicated thereon. The notation "RETURNED FOR
CORRECTION" shall require the Contractor to make the necessary revisions on
the drawings and submit for approval within thirty-five (35) days in the same
manner as before.

Approval of the Contractor's drawings shall not in any way relieve the Contractor
of any part of his obligation to meet all the requirements of the Contract or of the
responsibility for the correction of the drawings.

(b) Reproducible: Reproducible of all final approved drawings shall be made on CDs.

(c) All final as-built drawings shall be supplied in CD-ROMs (three numbers).

7.7 Neither the review nor lack of review of any drawing, calculation or data shall waive any of
the Specifications or Contract drawings, or responsibility for correctness of the drawings,

Volume II Sec 1-11

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

calculations or data. And defective work, materials, and equipment may be rejected
notwithstanding conformance with drawings, calculation and data reviewed by the
Employer. The Employer shall have the right to require the Contractor to make any changes
in the design which may be necessary, to make the apparatus/works conform to the
requirements and intent of the Specifications, with no additional cost to the Employer.

Approval of the Contractor's drawings (including cases of un-noticed/un-known

deviations) shall not in any way relieve the Contractor of any part of his obligation to
meet all the requirements of the Contract or of the responsibility for the correction of the
drawings. The ultimate responsibility of meeting all the requirements of the technical
specifications shall rest on the Contractor.

7.8 Any drawings changed by the Contractor during the development of his design after review
by the Employer shall be submitted for approval.

7.9 Within 30 days from the date of signing of the Contract, the Contractor shall prepare and
furnish to the Employer a schedule for submission of all drawings and data. Each drawing to
be submitted for the work of the Contract shall be listed in the Schedule, and the Schedule
shall contain separate columns for scheduled submittal dates and actual submitted dates. The
schedule will be reviewed by the Employer and the Contractor shall correct any defects
noted therein. The schedule shall at all times present a complete plan for orderly submission
of such drawings and data and shall be updated and resubmitted monthly showing actual
submittal dates and revised scheduling. The Contractor shall promptly notify the Employer
of any occurrence requiring substantial revision of the schedule giving a detailed explanation
of the cause of the revision. Revised schedules will be revised and corrected in the same
manner as the original schedule.

8. Quality Control

8.1 The Contractor shall provide and maintain a quality control program to ensure compliance
with quality standards of the Technical Specifications. Within 30 days from the date of
signing of the Contract, the Contractor shall furnish to the Employer three (3) copies of his
complete quality control procedures, manual, and a description of the quality control
organization.

8.2 The Employer will monitor the Contractor's methods, procedures and processes for
compliance with the quality control program and the quality standards of these
Specifications. Failure of the Contractor to effectively maintain the quality control program
throughout all phases of the work will be considered a failure to execute the work with the
diligence required by the Contract documents.

9. Painting

9.1 All sheet steel works shall be phosphated in accordance with the following procedure and in
accordance with BS 2569 and BS 5493.

9.2 Oil, grease, dirt shall be thoroughly removed by emulsion cleaning.

Volume II Sec 1-12

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

9.3 Rust and scale shall be removed by pickling with dilute acid followed by washing with
running water, rinsing with slightly alkaline hot water and drying.

9.4 After phosphating, thorough rinsing shall be carried out with clean water, followed by final
rinsing with dilute dichromate solution and even drying.

9.5 The phosphate coating shall be sealed by the application of two coats of stoving type zinc
chromate primer. The first coat may be "flash dried" while the second coat shall be stoved.

9.6 After application of the primer, two coats of finishing synthetic enamel paint shall be
applied, each coat followed by stoving. Touch up shall be applied after completion of tests.
The color for the finishing paint shall be light gray or as approved by Employer.

9.7 The final finished thickness of paint film on steel shall not be less than 100 microns.

9.8 Finished painted surface of panels shall present aesthetically pleasing appearance free from
runs and drips.

9.9 A small quantity of finishing paint shall be supplied for minor touching up required at site
after the installation of the panels.

10. Tools and Appliances

10.1 The Bidder shall propose complete, new and unused sets of all special tools or gauges and
testing kits, which will be required for normal operation and maintenance. The Bidder shall
furnish the list of tools and appliances and their prices under Price Schedule of this Bidding
Document. To the greatest extent possible, the tools for each specific operation shall be
stored in a single, locked, portable, steel box suitably and clearly marked for convenient
identification. In the event that such a box must be too large for convenient carrying by one
man, it shall be provided with rubber-tired wheels of substantial construction.

11. Spare Parts

11.1 The Bidder shall propose recommended spare parts required for three years’ maintenance
and shall include a price list of these parts. Sufficient information shall be provided to permit
the Employer to estimate spare parts requirements. This information shall be furnished under
Price Schedule of this Bidding Document.

11.2 Final quantity of spare parts shall be decided by the Employer and will inform the Contractor
within 35 days from the submission of the final BOQ (with the name of the manufacturer
and their type designation) by the Contractor pursuant to clause 5.

11.3 All spare parts supplied under the Contract shall be strictly interchangeable with the parts for
which they are intended to replace. They shall be treated and packed for long storage under
the climatic conditions prevailing at the site. Each spare part shall be clearly marked or
labeled on the outside of its packing with its description and purpose. When more than one
spare part is packed in a single case or other container, a general description of its contents is
to be shown on the outside of such cases or container and a detailed list enclosed inside. All

Volume II Sec 1-13

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

case containers and other packages must be suitably marked and numbered for purposes of
identification.

11.4 All cases, containers or other packages are liable to be opened at the site for such
examinations as the Employer may consider necessary and all such opening and subsequent
repackaging shall be at the expense of the Contractor.

11.5 All spare parts must be delivered to Site in advance of the trial operation. Contractor shall
ultimately prepare and deliver five (5) copies of the final consolidated spare parts list,
arranged specification-wise, with unit prices and quantities supplied.

11.6 It shall be in the interest of the Contractor to organize the delivery and systematic storage of
spare parts before the trial operation to obviate post erection difficulties and delays. Any
spare part consumed by the Contractor before final acceptance shall be replaced without any
cost to the Employer.

12 Technical Requirements

12.1 Electrical Auxiliary Power Supply

The electrical auxiliary and control power source shall be as follows:

(a) AC auxiliary power source : 3 phase, 4 wire, 50Hz, 400V

1 phase, 50Hz, 230V
(b) DC control power source : 110V
(c) DC power source for communication : 48V

12.2 Fuses and Links

Fuse and link carriers and bases shall be of such forms and materials that they protect
personnel from shock and burns in normal service and maintenance. Furthermore, fuse links,
fuse contacts and fixed contacts shall be shielded to prevent inadvertent contact with live
metal whilst the fuse is being inserted or withdrawn.

Fuses shall be of the non-deteriorating HRC cartridge type complying with IEC 269 and fuse
bridges shall be so designed as to permit detection of fuse rupturing without removing the
bridge. 'Zed' and screw-in type fuses shall not be permitted except with the specific approval
of the Employer.

Test links in current transformer circuits shall be of the bolted or plug-in type.

The labeling of fuses, carriers and bases shall comply with IEC 269. Identification labels
fixed to panels, boards and desks for fuses and links shall describe their duty, voltage and
rating.

Fuse and link carriers and bases shall be colored to the approval of the Employer. Fuses shall
be used only for DC circuits. For AC circuits MCCB/MCB's of appropriate ratings shall be
used.

Volume II Sec 1-14

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

12.3 Wiring

The equipment to be provided as part of this Contract shall be fully wired in accordance with
the following general requirement:

(a) All wiring shall be carried out with general-purpose 600-volt grade PVC copper wire
complying with the requirements of IEC. The wire core size shall not be less than 2.5
Sq. mm for current circuit. All wire cores shall be multistranded and flexible.

(b) Wires shall be neatly bunched and adequately supported so as to prevent sagging and
strain on termination.

(c) All inter panel wiring between panels that directly adjoin one another shall be made
through the cable duct underneath the panels. All inter panel wiring shall start and
terminate on terminal blocks, direct wiring between other items of equipment will
not be acceptable.

(d) Joints or splices in panel and inter panel wiring will not be acceptable.

(e) The wiring of like panels, cubicles or kiosks shall be identical.

(f) All wire termination shall be made with compression type connectors. Wires shall
not be spliced or tapped between terminal points.

(g) Not more than two wires shall be connected to any terminal at each end. If necessary,
a number of terminals shall be jumpered together to provide additional wiring points.

(h) Wiring leads and cable cores shall be permanently marked at both ends with an
approved type of marking device having black letters and numbers impressed on a
white background.

12.4 Terminal Blocks

(a) Multiway terminal blocks complete with screws, nuts, washers and marking strips
for terminal identification shall be furnished for terminating the internal wiring and
outgoing cables.

(b) Control terminals shall be washers head screw type, each suitable for connection of
at least two numbers of copper conductor cables of requisite cross-section at each
end through compression type (solder less) lugs. Screw type terminals with screw
directly impinging on conductor or any other type of terminal, which does not accept
compression type lugs, are not acceptable. The successful Bidder shall have to take
prior approval of the terminals to be used in the block from the Employer.

(c) Each terminal shall be marked with designations obtained from schematic diagrams.

At least 20% spare terminals shall be provided in the terminal blocks.

12.5 Nameplate

Volume II Sec 1-15

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

(a) Nameplates or rating plates shall be stainless steel and shall be engraved in English
language. Instruction plates, warning signs and anti marking whatever on the
equipment and parts and accessories thereof shall be both in English and Nepali
language.

(b) The switch handles shall be carved with the function number or work colored in
white.

(c) The details of the matters to be shown on the nameplates, etc. shall be indicated in
the drawings for approval.

(d) The Contractor shall provide nomenclature for all equipment installed in the
substation. Such nomenclatures shall be as approved by the Employer.

13 Compatibility

13.1 All equipment, structures, etc. offered by the Contractor shall be compatible with existing
systems.

13.2 The Contractor shall pay utmost attention towards compatibility in design, supply,
installation, interfacing and integration of the new SCADA system with the existing one.
The Contractor shall be fully responsible for the compatibilities and complete interfacing of
the new communication/signal system, integration in the SINAUT Spectrum, etc.

13.3 To ensure proper functioning, PLC equipment at the two ends of a line (connecting the
substations) shall be compatible in all respects; preferably they shall be of the same make
and model. If the Bidder offers any other make equipment, he shall prove that the offered
PLC equipment will work without any problem in the existing system. The Contractor shall
take full responsibility for the coordination of protection scheme and proper functioning of
the communication system across the line. The Employer reserves the right to reject the
equipment and the Contractor shall supply the same make and model equipment if the
equipment fails to perform properly during the warranty period.

13.4 The Contractor shall undertake a detailed study of the existing relay and protective schemes
and propose a suitable scheme along with relay settings of the proposed relays as well as for
the existing relays in the neighboring substations to ensure proper coordination of the relays
in the system. If required, the Contractor shall also be responsible for undertaking necessary
adjustments in the settings of the relays in neighboring substations. If necessary, the
Contractor shall also be responsible for design / supplying / executing all necessary works
for the proper functioning of the protection and communication schemes without additional
cost to the Employer.

14. Environmental Mitigation Measures

14.1 Physical Environment

The following mitigation measures shall be undertaken to reduce the adverse impacts on
the physical environment during construction of the substation.

Volume II Sec 1-16

 Khimti-Dhalkebar 220 kV Transmission Line Project
Package A2- Supply and Installation of 132 kV Substation Extensions at Khimti and Dhalkebar

- Discharge of cement slurry, garbage and other solid wastes generated by the
construction activities and workforce should be avoided where possible.
- Chemical and other hazardous materials should be dumped safely far away from
the water bodies.
- Disposal material of substation should be carried out within the acquired land for
substation or to the place designated by the Employer at a lead distance of approx.
200 meter. The waste materials of the substation shall be minimized to avoid for
separate land for disposal.

14.2 Biological Environment

None

14.3 Socio-economic and cultural Environment

In the construction phase following mitigation measures shall be adopted to minimize the
impacts:

- Control of adverse socio interactions between local communities and construction

work force.
- Awareness program regarding health and safety of substation.
- Awareness program for workforce.
- Insurance against health and safety.

14.4 Employment

The job preferences shall be given to local project affected family people.

Volume II Sec 1-17