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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
BID DOCUMENT
FOR
33 kV SWITCHBOARD PACKAGE
VOLUME I OF I
ENQUIRY NO.: RML/SPEC-33-SB/TS-05
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
VOLUME-I OF I
TECHNICAL SPECIFICATION OF 33 kV SWITCHBOARD
C O N T E N T S
S.NO. DESCRIPTION PAGE NO.
1. INTENT OF SPECIFICATION 2
2. TECHNICAL SPECIFICATION FOR 33 kV SWITCHBOARD 3
2.1 Introduction 3
2.2 Specific Requirements: 3
2.3 Standards 4
2.4 General Requirements 5
2.5 Busbars 7
2.6 Circuit Breakers 8
2.7 Earthing Trolleys 10
2.8 Current Transformers 10
2.9 Potential Transformer 11
2.10 Integrating Meters 11
2.11 Indicating Lamps 12
2.12 Relays 13
2.13 Control Switches and Push Buttons 13
2.14 Internal Wiring 14
2.15 Terminal Blocks 14
2.16 Cable Termination 14
2.17 Labels 15
2.18 Painting 15
2.19 Tests 15
2.20 List of Documents / Drawings to be Submitted 16
2.21 List of Operational Spares 18
2.22 Make of Components 19
3.0 CLEANING AND PACKING,SPARES:
4.0 DATA SHEETS AND SCHEDULES 20
5.0 TENDER DRAWING 29
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
1. INTENT OF SPECIFICATION
1.1 This specification is intended to cover the design, engineering,
manufacture, shop fabrication, assembly, pre-assembly, tests and
inspection at manufacturers work, packing, shipment, supervision of
erection at site of Rashmi Metaliks Ltd. at khadagpur.
1.2 The equipment and services furnished shall meet all the requirement of
this specification, data sheets etc., In case of any conflict / contradiction
among various part of the specification, data sheets the same shall be
referred to the engineer for clarification whose decision shall be final and
binding.
1.3 It is not the Intent to specify completely herein all aspects of design and
construction of equipment. Nevertheless, the equipment shall conform in
all respects to high standards of engineering, design and workmanship and
shall be capable of performing in continuous commercial operation in a
manner acceptable to the PURCHASER who will interpret the meaning
of the specification, drawings and shall have right to reject or accept any
work or material which in his assessment is not complete to meet the
requirements of this specification and / or applicable national and / or
international standards mentioned elsewhere in the specification.
1.4 Whenever material or item is specified or described by the name of a
particular brand, manufacturer or trade mark, the specific item shall be
understood as establishing type, function and quality desired. Other
manufacturer's products may also be considered provided sufficient
information is furnished so as to enable the PURCHASER to determine
that the products are equivalent to those named.
1.5 GENERAL INFORMATION ON ELECTRICAL & CONTROL VOLTAGES:
1.5.1 Auxiliary electrical equipment shall be suitable for operation on the following supply
system:
Spring charging motor, Closing & Tripping : 110 volts D.C. supply
Auxiliary supply : 240 volts, 1 phase 50 HZ A.C supply.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
1.5.2 The above voltage may vary as follows. All devices shall be suitable for continuous
operation over the entire range of voltages.
A.C. Supply variation:
i) Voltage variation : 10%
ii) Frequency variation : 5%
iii) Combined voltage and
iv) Frequency variation : 10%
D.C. Supply voltage variation :-
i) Closing device : - 15% to + 10%
ii) Tripping device : - 30% to + 10%
1.5.3 Two sources of each of the above supplies i.e. 240 volts AC, 110 volts DC will be made
available by the purchaser at one terminal point. The vendor shall include adequately
rated control transformers for any other voltage levels are required. Vendor's scope shall
include distribution beyond the points of supply including interconnecting cables,
terminal blocks etc.
1.5.4 Reference temperature for design of electrical equipment / devices:
50 Deg C for tropical regions, all marine conditions and polluted industrial atmosphere
with 100 percent humidity. However, the maximum temperature and humidity shall be
assumed not occurring simultaneously.
1.5.5 SCOPE OF WORK:
This specification covers design, manufacturing, fabrication, assembly, cleaning, painting,
testing, packing and supply of 33 KV MRSS HT Switch Board as per the enclosed
Technical Specification & Single Line Diagram.
1.5.6 SCOPE OF SUPPLY:
Any item not specifically mentioned above but is essentially required for proper and
successful operation of the systems shall be included in the scope of the bidder.
1.5.7 SCOPE OF SERVICES:
For Supervision of erection, testing and commissioning of the equipment of the equipment
will be done by the supplier, if required.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2. TECHNICAL SPECIFICATION FOR 33 kV SWITCHBOARD
2.1 Introduction
2.1.1 This specification covers the design, manufacture, supply & supervision of
erection, pre-commissioning & commissioning of 33 kV indoor type
switchboard incorporating draw out vacuum circuit breakers.
2.1.2 The 33 kV switchboard shall be capable of continuous and reliable
operation at the full load rating specified where continuity of operation is
of prime importance. Workmanship shall be the highest grade and the
entire construction in accordance with the best modern practice. The HT
switchboard shall be capable of withstanding the severest stresses likely to
occur in actual service and of resisting rough handling during transport.
2.1.3 The HT switchboards shall have incoming and outgoing feeders as
specified elsewhere in the enclosed single line diagram.
2.1.4 Circuit breaker shall be suitable to withstand inrush magnetising currents
of transformers and capacitor bank ON and OFF. Also circuit breakers
shall be used for synchronizing applications as specified.
2.2 Specific Requirements: 2.2.1 HT Switchboard:
Rated voltage
:
33 kV, 3 phase
Rated frequency
:
50 Hz
Fault level
:
31.5 kA for 3 sec
Degree of Protection
:
IP4X
Highest System Voltage
:
36 kV
One minute Power Frequency Withstand voltage
:
70 kV(rms)
1
1.2/50 micro second impulse
:
170kV (peak)1
Clearance in air
:
As per IS/IEC
Busbar Material
:
High Conductivity Electrolytic
grade Copper
Busbar Rating under natural cooled
condition
:
2000A
1 The insulation level of the synchronization breakers shall be as recommended by IEC:61936-1:2002 and
IEC:60694:2001
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Design Ambient
:
45 C
Maximum Busbar Temperature
:
As per IEC
Cable Entry for Outgoing feeder
:
Bottom of the panel
Cable Sizes
:
As specified in the SLD.
Class & VA Burden rating for CT/ PT
Shall be as specified in the
SLD.
Communication protocol for Relays
:
IEC61850
Communication protocol for meters
:
PROFIBUS / IEC61850
Earthing System
:
Resistance Earthed / Unearthed
2.2.2 Breaker Requirements:
Description
Outgoing Feeder Circuit
Breaker
Design ambient
:
45 C
Natural Cooling Condition
:
Shall not be less than 2000 A of in panel rating
Forced Cooling Condition
:
Not applicable
Rated Voltage
:
33 kV, 3 phase
Rated frequency
:
50 Hz
Fault level
:
31.5 kA for 3 sec
Circuit Breaker Type
:
Vacuum
Highest System Voltage
:
36 kV
One minute Power Frequency
Withstand voltage
:
70 kV (rms)
2
1.2/50 micro second impulse
:
170 kV (peak)2
Clearance in air
:
As per IS/IEC
Operating Duty
:
O-0.3s-CO-3 min-CO
Rated short circuit breaking capacity
:
31.5 kA
Dynamic Rating
:
78.75 kA
Rated short circuit making capacity
:
78.75 kA
DC current
:
14.25 kA (minimum)
Rated Asymmetrical breaking capacity
:
34.57 kA
Control Voltage
:
110 V DC, with single
independent source
2.3 Standards
The design, manufacture and testing of various equipments covered by
this specification shall comply with the latest issue of the following
standards:
2 The insulation level of the synchronization breakers shall be as recommended by IEC:61936-1:2002 and
IEC:60694:2001
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
IS:375 -
IS:694 -
IS:722 -
Marking and arrangement of switchgear busbars
PVC insulated cable with copper conductor for
voltages upto 1100 V
Integrating meters
IS:1248 - Electrical indicating instruments
IS:13118 - General requirements of circuit breaker for
voltages above 1000V.
IS:2705 - Specifications for current transformers
IS:3156 - Specifications for voltage transformers
IS:3231 - Electrical relays for power system protection
IS:3427 -
IS:6865 -
IEC 44 -
IEC 255 -
IEC 1036 -
IEC 60044-1 -
IEC 60041-2 -
Metal enclosed switchgear and control gear (1 kV
to 52 kV)
Control switches and push buttons
Instrument Transformers
Electric Relays
Static Meters
Current Transformers
Potential Transformers
IEC 62271-200- Circuit Breakers
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.4 General Requirements
2.4.1 Construction
2.4.1.1 The switchgear shall be metal clad, free floor standing, totally enclosed, dust and vermin
proof with draw out type circuit breakers. Vertical units shall be assembled to form a
continuous line up of uniform height.
2.4.1.2 The panel structure shall house the components contributing to the major weight of the
equipment such as circuit breaker, main horizontal busbars and other of the components is adequately supported without deformation or loss of alignment during transit or during operation.
2.4.1.3 Each unit of the switchgear shall have necessary internal sheet metal barrier to form separate compartments for buses, instruments, relays, cable connections etc.
2.4.1.4 Adequate barriers shall permit personnel work safely within an empty compartment
with the busbars energised. Checking and removal of components shall be possible without disturbing the feeder. All auxiliary equipment shall be easily accessible to facilitate their operation and maintenance. It shall be possible to set all relays and measuring instruments without de-energising the switchgear.
2.4.1.5 All doors and openings shall be fitted with dust excluding neoprene gaskets with
fasteners designed to ensure proper compression of the gaskets.
2.4.1.6 When covers are provided in place of doors, generous overlap shall be assured b e t w e e n sheet steel surfaces with closely spaced fasteners to preclude the entry of dust.
2.4.1.7 The panels shall have a rear cable chamber housing the cable and connections the design shall ensure generous availability of space for easy installation and maintenance. Cabling and adequate safety for working in one section without coming into accidental contact with live part in an adjacent section.
2.4.1.8 HT switchboard shall be constructed only of materials capable of withstanding the
mechanical, electrical and thermal stresses, as well as the effects of humidity, which are likely to be encountered in normal service. All insulating materials used in construction of the equipment shall be non-hydroscopic material, duly treated to withstand the effects of high humidity high temperature tropical ambient service conditions. Creepage distances shall comply to those specified in relevant standards.
2.4.1.9 Each panel shall be provided with space heater to prevent condensation and the same
shall be equipped with differential thermostat to automatically cut in and cut out the heater so as to maintain interior temperature of 5 Deg.C. above the ambient and should have manual disconnect switch.
2.4.1.10 The height of the panel shall not be more than 2700 mm. The total depth of the panel
shall be adequate to cater for proper cabling space.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.4.1.11
2.4.1.12
2.4.1.13
2.4.1.14
2.5
2.5.1
2.5.2
2.5.3
2.5.4 2.5.5
Provision shall be made for permanently earthing the frames and other
metal parts of the HT switchboard through a copper earth busbar running
throughout the full length of the switchboard at the bottom. Drawout type
switching units shall have sliding ground contact. It shall be possible to
earth the switchboard at two independent points on either ends for
connections to the external earthing network of the plant.
The panel shall have provision to extend on either direction of the board at
a future date (2 Feeders on LHS & 2 Feeders on RHS). The Ends of
busbars shall be suitably drilled for this purpose.
Suitable eye bolt for lifting of panel shall be provided. On removing the
eye bolts no holes offering access to panel shall be provided.
Circuit breaker closing, tripping, control and indication power will be
connected from single sources of 110V DC supply.
Busbars
The busbars shall be epoxy moulded sleeved.
The busbar chamber shall be totally maintenance free.
The switchboard shall comprise 3 phase main busbars which shall extend
through all units of the switchgear line up. The busbar mating surface
shall be tinned. High tensile bolts and spring washers shall be provided at
all busbar joints and busbar joints shall be silver plated. The busbar shall
be of uniform section throughout and shall be sized to continuously carry
the rated current without exceeding the maximum temperature rise, as
recommended by IEC over the maximum ambient temperature as
specified. Busbars shall be colour coded for easy identification of
individual phases. The SUPPLIER shall submit temperature rise test
report for the substantiating the selected size of busbars.
Busbars shall be supported at regular intervals and both, busbars and
supports shall be adequately sized and braced to withstand short circuit
level without deformation. All bus supports shall be non-carbonizing
material resistant to acid alkalies and shall have non-hydroscopic
characteristics.
For long busbars suitable expansion joints shall be provided. Thermal
design of the busbars shall be based on the installation of the switchgear in
poorly ventilated condition as per IS Thermal Design.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.5.6 Busbars shall be housed in a separate chamber which shall be accessible
for inspection only with special tools.
2.5.7 Insulated busbars for control supply of 110V DC & 220V AC through out
the panel shall be provided.
2.6 Circuit Breakers
2.6.1 Circuit breakers shall be triple pole, vacuum circuit breaker, drawout type.
2.6.2 The breakers shall have motor operated spring charged mechanism with
anti-pumping contactor. The control circuit shall be suitable for local as
well as remote control. Provision for manual operation shall also be
available.
2.6.3 The power supply voltage for the spring charge motor shall be 110V DC.
2.6.4 The breaker sockets and plugs should be heavily silver plated. The
breaker shall have adequate auxiliary contacts required by plant control
schematics. Additional 30% spare contacts (Minimum 10NO + 10NC) for
future use shall be provided and wired upto Terminal Boxes. Auxiliary
relays should be used to multiply the contacts.
2.6.5 All spare contacts of breakers shall be wired upto terminal blocks.
2.6.6 The operating mechanism shall be robust design with a minimum number
of linkages to ensure maximum reliability. The operating mechanism
shall be such that the breaker is at all times free to open immediately the
trip coil is energised. It is to be ensured that all the three poles open/close
in unison to avoid any eventuality of single phase operation of the
generator. All controls shall be suitable for 85 % to 110 % for closing of
110VDC and 70% to 110 % for tripping of 110 V DC supply.
2.6.7 Two (2) numbers of tripping coils shall be used for tripping the circuit
breaker and shall be planned with 110V DC supply along with capacitor
tripping unit for all breakers. The DC tripping circuit shall be provided
with capacitive tripping device additionally to facilitate positive operation
of the DC tripping coil in the event of failure of DC supply to the tripping
circuit.
2.6.8 Breaker shall be tripped through any of the trip coils available in the
breaker through TNC switch / remote tripping impulse / master trip
operated signal during normal operation.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.6.9 The breaker shall have the distinct positions indicating:
`Service ' position: With main auxiliary contacts connected
`Test' position : With power contacts fully disconnected and control
circuit contacts connected
`Isolated' position: With
fully
both power and control circuit contacts
disconnected
2.6.10 The trolleys of the circuit breaker shall be so inter-locked that,
- It shall not be possible to isolate it from the inserted position or
to insert it in from the isolated position with the breaker closed.
- The circuit breaker can be closed only when it is in one of the three
positions or when it is fully out of the panel.
- It shall not be possible to open the breaker compartment door
unless the breaker is drawn to the isolated position or test position.
- Inadvertent 'pushing in' of the drawout circuit breaker in service
position, with auxiliary circuit plug not in the position shall be
prevented.
2.6.11 The breaker shall be able to function even under condition of phase
opposition that may arise due to totally out phase synchronisation as per
relevant IS or IEC standard.
2.6.12 The tips of the main contact shall be adequately silver plated to withstand
arcing.
2.6.13 The operating mechanism shall be electrically controlled spring operated.
2.6.14 Mechanism shall have anti pumping and trip free circuitry.
2.6.15 Local arrangement for operating the breakers both electrically and
mechanically shall be provided.
2.6.16 The breaker trolley shall remain inside the cubicle even in the draw out
position.
2.6.17 Automatic safety shutters shall be provided to ensure the inaccessibility of
live parts after the breaker is drawn out.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.6.18 The circuit breaker trolley shall be provided with a heavy duty self
aligning earth contact which shall make before and break after the main
isolating contacts during insertion into and withdrawal from the service
position of the breaker. Even in the isolated position positive earthing
contact should exist.
2.6.19 Circuit breakers of identical rating shall be inter-changeable.
2.6.20 Circuit breaker shall have provision for manual re-charging.
2.6.21 ON / OFF indicator and number of operation centre shall be provided.
2.6.22 Mechanical lock along with cover shall be provided for closing lever /
knob for the circuit breaker, which are identified for synchronising
purpose.
2.7 Earthing Trolleys
2.7.1 Bus earthing and cable earthing trolleys (one number each per rating) shall
be provided along with each switchboard. Necessary safety interlocking
shall be incorporated in the bus earthing trolley to avoid insertion of
trolley, when the bus is live. Similarly, suitable interlock shall be
provided to avoid insertion of cable earthing trolley, when the cable side is
live (i.e.) supply is extended from remote for incomer feeders. These
interlocks shall be of electro-mechanical type. Closing of the source
incomer breakers shall be inhibited when the Bus earthing trolley is in
inserted position by providing a suitable mechanical key interlock.
2.8 Current Transformers
2.8.1 The current transformer shall be cast-resin insulated type of adequate
capacity and proper characteristics on secondary as specified. The current
density should not be more than 1000 amps/sq.inch.
2.8.2 CTs shall withstand stresses originated from short circuit. They shall have
ratios, output and accuracy as specified in the drawings. Single core type
CTs shall be provided for 2000 Amps rating breaker feeders. CTs in other
feeder shall be of multicore type.
2.8.3 CTs shall be preferably of bar primary type, they shall be mounted on the
switchboard stationary part and suitable approach for maintenance shall be
provided.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.8.4 The secondary CT leads from all panels should be terminated on the front
of the board on easily accessible shorting type terminal connectors so that
operation and maintenance can be carried out when the panels are in
service.
2.8.5 CTs shall be suitable for continuous loading of 120% of rated current.
2.8.6 CTs shall be subjected to heat run test, if the same has not been type tested
in the last three years.
2.8.7 Single CBCT shall be considered in at incoming / outgoing feeders
covering all runs of cables as indicated in the single line diagram.
2.8.8 The Burden indicated for the current transformers shall be at lowest
tappings.
2.9 Potential Transformer
2.9.1 The potential transformer shall be cast-resin insulated type. It shall be
draw out type and easily accessible so that the same can be attended to or
replaced when the panels are in service condition.
2.9.2 The potential transformers shall be protected
primary side and MCBs on secondary side.
outputs and accuracies specified.
through HRC fuses on
They shall have ratios,
2.9.3 The draw out mechanism shall disconnect the primary connection before
the PT or its primary fuses become accessible.
2.9.4 All PTs shall be single phase type. The voltage factor shall be 1.2 times
continuous and 1.9 times for 8 hours.
2.9.5 The Line PTs will be mounted on the top of the respective panel and
separate cubicle will be provided for bus PT.
2.10 Integrating Meters
2.10.1 Integrating meters of the Trivector or equivalent types capable of
indicating all phase instantaneous parameters and recording kWH,
kVARH and kVAH directly shall be provided.
2.10.2 These shall be suitable for 3 phase, 4 wire 50 Hz circuits with unbalanced
loading and with two sets of elements connected to current and potential
transformers of specified ratio.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.10.3 The trivectormeter shall be of digital type, class 0.2 or better with
communication port, RS485 interface with the protocol as specified in
the specific requirement of the switchboard, for hooking up to PC /
DCS.
2.10.4 The Trivector meters available all the incoming and outgoing feeders shall
have import/export facility.
2.11 Indicating Lamps
2.11.1 Indicating lamps shall be of cluster LED type low watt consumption,
provided with series resistor where necessary and with translucent lamp
covers. Bulbs and lenses shall be easily replaceable from the front.
2.11.2 Following indicators are required on the panel having lens colours as
follows:
Breaker ON : RED
Breaker OFF : GREEN
Auto trip : AMBER
Trip Circuit healthy : WHITE
Spring Charged : BLUE
Breaker in Test position : WHITE
Breaker in Service Position : RED
2.11.3 Potential Free contacts for the following function shall be provided in the
synchronising breaker panels for hooking up to synchronisation panel:
a) Breaker ON
b) Breaker OFF
c) Spring Charged
d) Auto Trip
2.11.4 Live line indications with proven design shall be provided at incoming
and outgoing sides of all the feeders and bus bars. No PT supply shall be
used for the above purpose.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.12 Relays
2.12.1 All protective relays shall be back connected, draw out type, suitable for
flush mounting and fitted with dust tight covers. All relays shall be
mounted on the front of the panel and shall be specified as per
requirement. The current and the voltage coils shall be rated as specified.
2.12.2 All relays shall have built-in flag / indicator to indicate operation. All
tripping relays shall be suitable to operate on the specified DC voltage.
2.12.3 Feeder & transformer protection relays shall be of numeric /
microprocessor type with self diagnostic facility, RS 485 communication
port with protocol as specified for interfacing with PC / DCS, software for
data downloading & configuration. Feeder / transformer protection relays
shall have IDMT / highset overcurrent & earth fault elements. Alpha
numeric display shall be available for the relays and all fault data
shall be displayed in natural language, without needing to refer codes
/ manuals.
2.12.4 Separate sensitive earth fault relay shall be provided for the feeders as
called for in the single line diagram. Any case this relay can not be
combined with the main protection of the feeders.
2.12.5 Master trip relay, trip circuit supervision relays and auxiliary relays shall
be provided, wherever specified. All the auxiliary relays shall be
electromagnetic type.
2.12.6 All spare contacts of relays shall be wired up to Terminal Blocks.
2.13 Control Switches and Push Buttons
2.13.1 Control switches shall be of the heavy duty rotary type with name plates
clearly marked to show the operation. They shall be semi-flushed
mounting with only the front plate and operating handle projecting.
2.13.2 Circuit breaker control switches shall be of the spring return to neutral
type, while local / remote selector switches and instrument selector
switches shall be of the stay-put type.
2.13.3 Emergency push button shall be provided for each circuit Breaker in the
panel
2.13.4 Mush-room type emergency push button shall be provided.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.14 Internal Wiring
2.14.1 Internal wiring and inter-panel wiring for all circuits shall be carried out
with 1100/660 V grade, single core, multi strand, PVC insulated copper
conductor wire of minimum 2.5 Sq.mm for other control circuit.
2.14.2 The wiring shall be neatly bunched adequately supported and properly
routed and terminated in the respective terminals with suitable lugs. There
shall not be more than two wires connected at a terminal.
2.14.3 Wires shall be identified by numbered ferrules at each end. The ferrules
shall be of ring type and non deteriorating material.
2.14.4 All control circuits shall have MCBs mounted in front of the panel and
shall be easily accessible.
2.15 Terminal Blocks
2.15.1 Terminal blocks for the LT connections shall be of 660V grade of stud
type and of adequate current rating with minimum 2.5Sq.mm.
2.15.2 The insulating barriers shall be provided between adjacent terminals.
Provision shall be made for label inscription on terminal block. Cables
should never be terminated directly on components. Provision shall be
made for CT terminals shorting links, remote ON/OFF pushbutton, remote
ON/OFF indication and remote ammeter. 30% spare terminals shall be
provided on each terminal block.
2.16 Cable Termination
2.16.1 The HT switchboard shall be designed to facilitate outgoing power
connection through XLPE insulated armoured cables with bottom entry.
2.16.2 Ample space for connection of these cables shall be provided at the rear of
the switchboard. The cable termination arrangement shall be of adequate
size and design to receive the required number of cables as specified.
Proper cable clamping arrangement shall be provided. Minimum height
of 700mm shall be maintained between gland plate and the terminals
for the HV cables.
2.16.3 Detachable gland plate of adequate thickness shall be provided for the
cable entry into the panel. Sufficient space shall be provided to avoid
sharp bending and easy connection. Gland plates to be made up of non-
magnetic material, wherever single core cable are used.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.16.4 Suitable shrouds shall be provided to prevent accidental contact with live
outgoing terminations of other feeders while carrying out maintenance on
one feeder.
2.17 Labels
2.17.1 Name plates of approved design shall be provided to represent circuit
designation for each feeder. Material for name plates shall be anodised
aluminium. They shall be firmly secured with fasteners.
2.18 Painting
2.18.1 All metal surfaces shall be chemically cleaned, degreased and pickled in
acid to produce a smooth clean surface, free of scale, grease and rust.
2.18.2 After cleaning, phosphating and passivation treatment, the surface shall be
given two coats of zinc rich epoxy primer and baking in the oven.
2.18.3 After primer, it shall be given two coats of epoxy paint, shade RAL 7032,
in semi matt finish. Sufficient quantity of touch up paint shall be
furnished for application at site
2.19 Tests
2.19.1 The 33 kV switchboard shall be tested for routine tests as per the relevant
IS / IEC.
2.19.2 All the panels shall be tested in assembled condition
2.19.3 The routine tests shall be carried out in the presence of PURCHASER /
CONSULTANT.
2.19.4 Type test certificates having conducted in the last three years shall be
submitted for similar rating, type of the switch board and circuit
breakers for review. In case the above is not available, the
SUPPLIER shall have to conduct the type tests as per IEC/IS with out
affecting delivery schedule of the switch board without cost to
PURCHASER.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.20 2.20.1 2.20.1.1
2.20.1.2
2.20.1.2.1
2.20.1.2.2
2.20.1.2.3
2.20.1.2.4
2.20.1.2.5
2.20.1.2.6
2.20.1.2.7
2.20.1.2.8
2.20.2
2.20.2.1
2.20.2.2
List of Documents / Drawings to be Submitted Drawings / Documents required along with the Bid The BIDDER shall submit in their Technical BID, drawings, diagrams
and all such information which are necessary to fully understand the offer
both technically and commercially.
As a minimum requirement the following information shall be supplied
with the technical bid in sufficient detail to fully describe the scope of
work and the services offered:
Filled in Bidder Credentials
Filled-in data sheets and schedules.
Feeder wise Dimensioned General Arrangement Drawings showing
the physical location of all the components for HT Switchboard
Bill of quantities with type references.
Fish plate details.
Quality Assurance Plan.
Catalogues of all equipment.
List of sub-suppliers.
Drawings and information required from Supplier during Contract
Stage
The drawings and documents to be furnished by the SUPPLIER after the
award of the contract shall include but not limited to the following. A
drawing / document submission schedule clearly identifying the
documents to be submitted and the purpose of the submission (for
information, approval etc., as elaborated elsewhere in this document) shall
be furnished after discussions and in consultation with the
CONSULTANT / PURCHASER.
Detailed time schedule in the form of network or bar chart for the design,
manufacture, delivery, erection, testing and commissioning period with
critical milestone activities and other important intermediate dates for
uninterrupted progress of the project.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.21.2.1 The following drawings and documents shall be compiled in a single set
and submitted for approval:
Filled-in revised technical data sheets.
Quality Assurance Plan.
List of manufacturers and specification of all standard equipment.
Catalogues of all equipment.
Connection diagram for all units (like incomer, outgoing feeders,
breaker wiring diagrams, etc.).
Schematic diagram for the complete switchboard.
Fish plate details for the busbar connections.
Terminal connection diagram of the main terminal boards.
Temperature Rise test certificates for similar ratings conducted at
any recognised institute.
Sketches of the overall dimensions of the board / busduct - plan,
elevation and section views clearly showing the bus size.
Typical internal arrangement drawings for all types of feeders, showing clearly the dimensions of components / devices and
clearances.
Plan and sectional layout with detailed bill of quantities for the
busduct and its accessories.
Brand names of all components incorporated in the boards, etc.
Marshalling TB schedule as per the required format.
Guaranteed technical particulars for the critical components.
Certificates of tests giving the results of tests conducted as per the appropriate standards on similar switchboard and interior
components.
Shipping dimensions of the board / busduct and its weight - gross
and net (without packing).
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Test certificates and inspection reports of all equipment.
Other drawings and documents as indicated in various sections of
this document.
2.21.2.2
2.21.2.3
2.21.2.4
2.21.2.5
Erection manuals and installation procedures for all equipment.
Operation and maintenance manuals for all equipment and systems.
'As-Built' drawings.
CD containing all final drawings and documents.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.21.2.6 Each drawing / document shall have a title block consisting of the
following:
Project :
Customer :
Consultant :
Title :
Drg. No. :
Rev.No. and Details :
2.21 List of Operational Spares
The scope of supply for this package shall include the items as mentioned
below:
a. Three (3) Numbers of 110V DC Tripping Coil for each type of
breaker 1 Lot
b. Two (2) number of spring charging Motor for each type of breaker
1 Lot
c. One Set of PT Fuses (3 nos) 1 Lot
d. Five (5) Sets of Indication lamps for each colour 1 Lot
e. Three (3) Sets of fixed contacts with shrouds in each rating of
breaker 1 Lot
f. Three (3) sets of main contacts with shrouds in each rating of
breaker 1 Lot
g. Two (2) sets per rating of Auxiliary contacts for breakers 1 Lot
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
2.22 Make of Components
1. HT Breaker( VCB) BHEL/Siemens/ABB/Areva/Crompton
2. Vacuum Contactor BHEL/Siemens/ABB/Areva/Crompton
3. HRC Fuse. L & T /GE/ Siemens
4. Timer L & T /GE/ BCH/ Schneider/EAPL
5. Pushbutton L & T / Siemens/ BCH/ Vaishnu/ GE
6. Indication Lamp Vaishnu/ L&T/ Siemens/ BCH/Emco
7. Current Transformer AE / Kappa / PRAGATHI
8. Indicating Meters Enercon/AE / Rishav (L&T) / IMP/ SCHNEIDER
9. Selector Switch- Auto / Manual Kaycee / Salzer / Vaishnu
10. Power Terminal Connectwell / ACDC/Elmex
11. Control Terminal Elmex / Connectwell / ACDC
12. Power & Control wire. Finolex / KDK
13. Socket (Crimping type) Dowells / UML/ Clippon
14. Transducer Enercon/AE /ABB
15. Potential Transformer AE / Kappa
16. T N C Switch. Alstom / Salzer
17. MCB MDS / Siemens/ GE
18. Hooter. Kheraj / Local
19. Relay Alstom / ABB/L&T
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
3.0 CLEANING AND PACKING:
3.1 CLEANING
Surface of all parts shall be cleaned to remove scale, dirt, oil, water, grease and other foreign
objects prior to final assembly of the equipment.
3.2 PACKING
The equipment after acceptance by inspecting agency, if any shall be shipped to site duly
packed in wooden crate. The equipment shall be wrapped in polyethylene sheet before being
placed in crate or wooden box. All crates shall have skid bottom for handling. All lose parts
of the equipment shall be properly boxed. The consignee address to be clearly marked on the
crate. The wooden crate or box shall be sturdy so that it is not damaged during transportation
or handling.
3.3 DELIVERY:
Delivery period of the equipment including all its accessories specified in the specification
shall be strictly follows as per order. Timely delivery of the equipment is the essence of
contract.
3.4 GUARANTEE:
The supplier should be responsible for correctness of rating / workmanship and performance
of the equipment. The supplier / bidder shall provide a guarantee covering rectification of all
detects in the design, materials and workmanship of all items provided under the
specification for a period of 12 months from the date of satisfactory commissioning and 18
months from the date of delivery whichever period is later. During guarantee period any
defects found with the parts or equipment will be free replacement or repairing of the
defective item. The guarantees for performance shall cover individual items and the system
as a whole.
3.5 SPARES: 3.5.1 COMMISSIONING SPARES
All spares required for commissioning of the 33KV H.T. Switch Board and for its efficient
operation until provisional acceptance after demonstration of satisfactory performance in
accordance with the guarantees are in the scope of supply.
3.5.2 SPARES FOR TWO (2) YEARS OF NORMAL WORKING
Bidder are to submit purchaser a list of recommended spares for two years of normal
operation of 33 KV H.T. Switch Board.
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
3. DATA SHEETS AND SCHEDULES
SL. DESCRIPTION
3.1 BIDDER INFORMATION
3.2 BIDDER CREDENTIAL
(to be submitted along with the offer)
3.3 33 kV SWITCHGEAR
3.4 SCHEDULE OF DEVIATIONS
PAGE NO.
II.21
II.22
II.23
II.26
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Data Sheet No.
3.1
Sheet No.: 1 / 1
Title :
BIDDER INFORMATION
S.No
Description
Unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Bidder's complete Company Name and Postal Address
Tender Reference and Date
Proposal Validity (No. of Days)
Whether particulars of past similar experiences
furnished?
Name and particulars of Collaborator, if applicable
Equipment warranty period from the date of
commissioning
Whether furnished offer as per specification?
Whether list of deviations / exclusions taken furnished?
Whether all taxes & duties included in the price
schedule?
Whether offer for 2 years' operational spares included?
Whether all commissioning spares included in base
offer?
Whether a project schedule with commissioning date
is enclosed?
Whether equipment guarantee schedule furnished?
Whether the drawings required as per specification
enclosed?
Whether quality plan enclosed?
Signature Of The Bidder :
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Data Sheet No.
3.2
Sheet No.: 1 / 1
Title :
BIDDER CREDENTIAL (to be submitted along with the offer)
S.No
Description
Unit
1
2
3
4
5
6
7
8
Manufacturing unit location
No. of years in manufacture of MV / HV Switchboards
Total No of MV / HV Switchboard supplied per year for last three
Years a. 2007-08
b.2008-09
c.2009-10
Turn-over of MV / HV Switchboard division for last three year
in Rs. Crores a. 2007-08
b.2008-09
c.2009-10
Whether Type Test Certificate Copies enclosed, conducted
within the last three (3) years ?
a. Temperature rise test certificates for 2000A rating
b. Short time rating (31.5kA with Idc of min.30%) certificate
In-panel rating for 2000A breaker at ambient of 45 Deg C?
Confirm whether the submitted offer has any Deviations
( if Yes, kindly ensure that the schedule of deviations sheet
is attached with the offer )
Confirmation of circuit breakers for the intended application
as specified in the clause no:2.2.2
A
Yes / No
Yes / No
Yes / No
Yes/No
Signature Of The Bidder :
-
RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Data Sheet No.
3.3
Sheet No.: 1 / 3
Title :
33 kV SWITCHGEAR
S.No
Description
Unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
19.1
19.2
19.3
Make
Type of switchgear
Voltage rating
Rated Current
Short time current
Short time duration
Max. temperature of busbar
Continous current rating of busbars and busbar material
Degree of protection
Colour, finish and shade
Busbar insulation
1.2/50 micro sec.impulse
1 min. power frequency
Cable Entry
o. of Incomer Feeders and Rating
No. of Outgoings Feeders and Rating
Whether Bus PT panel considered?
Whether CTs, PTs, metering and protection provided as
per drawing / specification?
Breaker Details:
Rated Voltage
Rated short circuit breaking capacity
Rated current
kV
A
kA
Sec.
kV
kV
kV
kA
Amps
kA
19.4 Rated short circuit making capacity Signature Of The Bidder :
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RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
Data Sheet No.
3.3
Sheet No.: 2 / 3
Title :
33 kV SWITCHGEAR
S.No
Description
Unit
19.5
19.6
19.7
19.8
19.9
19.10
19.11
19.12
19.13
19.14
19.15
19.16
19.17
19.17.1
19.17.2
19.17.3
19.17.4
19.17.5
19.17.6
19.17.7
19.17.8
Rated short circuit duration
DC component of rated short circuit breaking current
Rated assymetrical breaking capacity
Rated lightning impulse withstand voltage
Rated power frequency withstand voltage
Drive
Rated Operating Duty
Rated Auto Reclosing Duty
Rated No. of Operation at Rated Current
Rated No. of Operation at Rated Short Circuit Current
Mechanical life of Interrupter
Mechanical life for Drive
Operating Times
Closing Time
Spring Charging Time
Opening Time / Contact parting time
Arcing Time
Break Time
Dead Time
Close-open Time
Minimum command duration
a. Opening
b. Closing
kA
kV
kV
m sec
Signature Of The Bidder :
-
RASHMI METALIKS LTD
TECHNICAL SPECIFICATION OF 33KV IN DOOR SWITCH BOARD
FOR 350 CUM MBF AT KHARAGPUR
4
.
T
E
N
D
E
R
D
R
A
W
I
N
G
Title :
PRICE SCHEDULE
Sl.No.
Description
Unit
Total Price in Rs.
I.
1.
a.
b.
c.
d
e
f.
2.
3
4
5
6
7
II
1.
2.
3.
III
SWITCHBOARD
Basic price of 33 kV Switchboard complete with CTs/PTs, etc.,
as per enclosed drawings & Ex-works,including packing &
forwarding charges
33 kV Switchgear Panel as per Drg. Titled, "Single Line Diagram
for 33 kV Switchboard", Drg. No: 2-27331-900-0468, Rev.0
Supply of manufacturers recommended Commissioning Spares.
Supply of manufacturers recommended Maintenance spares for two years Normal operation.
Busbar Earthing Truck with necessary interlocks (2000A)
Cable Earthing Truck with necessary interlocks (2000A)
Cable Earthing Truck with necessary interlocks (1250A)
Sub-Total (a to f)
Excise Duty including education cess
Sales Tax / CST / VAT
Freight Charges upto Site
Transit Insurance
Total (2 to 6)
Site Services
Charges for switchboard commissioning and supervision of
erection, Pre-commissioning and Commissioning
(Minimum four (4) days & two (2) visits)
Configuration & simulation of the numeric relay and training
of plant engineers for operation & maintenance of the numeric
relays (Minimum two (2) days & one (1) visit)
Total (1 to 2)
GRAND TOTAL (I.7 + II.3)
1 Set
1 Lot
1 No.
1 Lot
1 No.
1 No.
Signature Of The Bidder :