TECHNICAL SPECIFICATION FOR 12 KV, 350 MVA,
1250/800A, 16 KA, MULTI PANEL (INCOMING, BUSCOUPLER AND OUTGOING) SHUNT TRIP, INDOOR TYPE
SWITCHGEAR
WITH
MOTOR
OPERATED
SPRING
CLOSING VACUUM CIRCUIT BREAKER (WITH SCADA
COMPATIBLE NUMERICAL NON-DIRECTIONAL OVERCURRENT AND EARTH
FAULT PROTECTION RELAY
FACILITIES) AS WELL AS 3 PHASE 3 WIRE CT/PT
OPERATED FULLY STATIC AMR COMPATIBLE TRIVECTOR ENERGY METERS FOR 11KV FEEDER METERS
RELATED TO 11 KV SWITCHGEAR
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
A TECHNICAL SPECIFICATION FOR 12 KV, 350 MVA, 1250/800A, 16 KA,
MULTI PANEL (INCOMING, BUS COUPLER AND OUTGOING) SHUNT
TRIP, INDOOR TYPE SWITCHGEAR WITH MOTOR OPERATED SPRING
CLOSING VACUUM CIRCUIT BREAKER (WITH SCADA COMPATIBLE
FACILITIES)
1.0
SCOPE OF WORK
This Specification is intended to cover the design, manufacture, assembly, testing at
manufacturer‟s works, supply and delivery (properly packed for transport by road) of
12 KV, 350 MVA, 1250/800A, 16 KA, Multi Panel, Shunt Trip, Indoor Type, with
Motor Operated, Spring Closing, Vacuum Circuit Breaker having SCADA
Compatible facilities & complete with all accessories for efficient and trouble free
operation as specified hereinafter.
The scope of work shall include transportation and delivery of all the equipment &
accessories at destination point.
2.0
GENERAL INFORMATION
The site conditions and weather reports are described in clause No. 6.
Before despatching equipment, all external holes including holes for cable glands
shall be blocked suitably so that no foreign element may enter into it.
3.0
APPLICABLE STANDARDS
Unless otherwise stated, equipment shall be designed, constructed and tested in
accordance with latest revisions of following Indian Standards :
a) Circuit Breaker
IS:13118-1991
b) Potential Transformer
IS:3156-1992
c) Current Transformers
IS:2705-1992
d) Painting
IS:5, Shade 631
e) Other applicable relevant Indian Standards
4.0
COMPLETENESS OF SUPPLY
The general condition of contract issued along within this specification, become a
part of this specification. The Tenderer shall consider them in details and shall be
responsible for and governed by all the requirements mentioned therein.
In the event of any discrepancy between this specification and other documents
mentioned in above para, the stipulation of this technical specification shall govern.
The specification shall be read and constructed with all drawings, schedules and
annexure appended to this specification which shall form part of this specification.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
5.0
EQUIPMENT & SERVICE
5.1
Equipment & Service To Be Furnished Under This Specification
5.2
a)
Multi-panel Vacuum Circuit Breaker shall consist of 12 kV, 16 kA Multi panels
(Incoming, Bus Coupler and Outgoing) Shunt Trip, Indoor type Vacuum Circuit
Breaker with SCADA Compatible facilities.
b)
The equipment shall be complete with all necessary accessories and materials
in accordance with the Specification.
c)
The base channel frames for the switchgear for grouting in the floor shall be
complete with anchor bolt, nuts and leveling attachment.
d)
Special tools and tackles.
e)
All relevant drawings, data and instruction manuals.
Equipment & Service Excluded From This Specification
(where applicable)
a) All concrete foundation works.
b) Installation of equipment.
c) Power and control cable for connecting the switchgear with equipment furnished
by others.
6.0
DESIGN CRITERIA
The equipment will be used for controlling supply to power transformers and
overhead or underground feeders.
The equipment shall be connected by XLPE Aluminium Power Cables.
The equipment will be located indoors in a clean but humid and tropical atmosphere.
For the purpose of designing, the following conditions shall be considered unless
otherwise specified :
a)
Elevation above mean sea level
1000 M
b)
Maximum ambient temperature
- in shade
- under sun
50ºC
60ºC
c)
Maximum daily average temperature
45ºC
d)
Minimum ambient air temperature
4ºC
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
6.1
e)
Relative humidity
100%
f)
Horizontal acceleration due to seismic force
59/100
g)
Maximum wind pressure
150 Kg/m2
h)
Pollution level
i)
It may be mentioned that sites fall within Seismic zones III & IV classified as per
IS:1893-1984.
Heavily polluted atmosphere
Rated Voltage
The equipment shall be suitable generally for system of nominal voltage of 11000
Volts, 3 phase, 50 C/S, system may be effectively or non effectively earthed.
Nominal voltage of the system where the equipment will be used may be taken as
11 kV (Phase to Phase), which shall be subjected to a variation upto 13 kV (Phase
to Phase) on the higher side for prolonged period of use. The rated voltage of
equipment shall be considered as 12 kV.
6.2
Rated Current
The multi-panel Vacuum Circuit Breaker buses shall be rated for continuous current
of 1250 Amps for 12000 Volts and maximum temperature rise of the bus and bus
connection shall be limited as per provision in the IS. The Circuit Breaker unit shall
be rated for continuous current of 800 Amps at 12000 Volts for Incoming, Outgoing
& Bus Coupler Switchgear.
6.3
Short Circuit Level
The equipment shall be rated for a maximum fault level of 16 kA at applicable
system voltage of 12 kV.
6.4
Rated Short Circuit Breaking Capacity
The R.M.S. value of the AC component of the rated short-circuit symmetrical
breaking current shall be 16 kA for 12 kV system for 3 seconds.
6.5
Rated Short Circuit making Current
The rated Short Circuit Making Current shall be calculated in accordance with the
recommendation contained in relevant IS.
6.6
Maximum Temperature Rise
Maximum temperature rise of circuit breaker, instrument transformers etc. shall be
as per provision in relevant IS.
6.7
Rated Voltage of Operating Device
Control voltage will be 30 Volts DC with variation as specified in the relevant IS unless
otherwise stated.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
6.8
Impulse Withstand Voltage
Impulse withstand voltage at 1.2 / 50 micro second wave crest shall be 75 kV.
6.9
7.0
7.1
Power Frequency Withstand Voltage
Power frequency withstand voltage shall be 28 kV for 1 minute.
SPECIFIC REQUIREMENT
General
The equipment shall be indoor, metal enclosed, floor mounted suitably isolated,
Floor Level horizontal draw-out Vacuum Circuit Breaker (Having SCADA
Compatible facilities).
Design and construction shall be such as to allow for extension at either end in
future.
7.2
Construction
Each board shall consist of stationary type, self-supporting sheet-steel cubicle and
draw-out type circuit breaker. The design and workmanship shall permit complete
interchangeability of the circuit breaker unit among multi-panel board including
incoming & outgoing feeder breaker and bus coupler breaker and vice-versa.
The circuit breaker cubicle shall have structural steel frame work enclosed on all
sides and top by sheet steel of minimum 2 mm thickness. Overall height will be
maximum 2700 mm.
The cubicle shall be provided with a front access door with a removable back cover.
The circuit breaker, bus-bar, instrument transformer and cable end box shall be
installed in separate compartments within the cubicles.
The compartment shall be so constructed that failure of one equipment does not
affect the adjacent units. Suitable vent shall be provided for satisfactory
performance. Each compartment shall be separated from adjacent one by sheet
steel barrier. Offered equipment shall be type tested against internal arc as per
provision in IEC Publication No. 298: 1981.
Relays, meters, switches and lamps shall be flush mounted on the hinged front door
of either the cubicle itself or the control cabinet built on the front of the cubicle.
All fixing bolts, screws etc. appearing on the panel shall be so arranged as to
present a neat appearance. Door hinges shall be concealed type.
Right angle side entry cable end box shall have to be provided as per requirement
including accessories for connection with bus of multi-panel board rated for 1250
Amps. Arrangement of side entry cable end box shall be such that it may be
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
detached from the panel, if necessary, due to site condition. Suitable flange plate
shall be provided for blocking the passage of side entry cable end box, if situation so
demands. Side entry cable end box shall be supplied in detachable condition in a
separate crate.
Provision shall be made for sealing the following :
Potential transformers shall be provided with sealing arrangement by extension
pieces, welded at appropriate places of the potential transformer with stationary
portion of equipment so that P.T. cannot be displaced from its position when it is
racked in position.
The P.T. and secondary fuse units when fitted over the top of P.T. / Cubicle, shall be
provided with sealing arrangement by a common steel sheet of sufficient rigidity and
with suitably hinged at one side, so that after the said fuse units are sealed, no part of
the fuse grips and connections become accessible from outside for displacement of
the same.
The multi-way terminal block inside the cubicle where all the secondary leads from the
CTs & PTs will terminate shall be covered with insulated transparent cover having
suitable sealing arrangement for preventing access to those terminals for manipulation
of connections or loosening the same.
Test terminal block of metering circuit shall be covered having suitable sealing
arrangement.
7.3
Bus and Bus-taps
The main bus of each section of Multi-Panel Board shall be of high conductivity
electrolytic copper liberally sized for 1250A.
The bus-end connections shall be so supported as to be capable to safely withstand
stresses due to maximum short circuit current and also to take care of any thermal
expansion.
Three phase bus shall be adequately insulated for working voltage. For air insulated
circuit breaker, bus-bar shall be provided with insulating sleeves and joints shall be
provided with insulated removable shrouds.
All bus connections, joints and taps shall be tinned or silver plated, Connections
shall be as short & straight as possible.
Necessary provision shall be made for testing current transformer primary by
removing insulated portion of the joints without any difficulty.
7.4
Name Plate
Name Plates of approved design shall be furnished at front and back of each cubicle
for the purpose of feeder designation.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Material for Nameplate shall be transparent plastic sheet of 3 mm thick and 25 mm x
150 mm and shall be held by self tapping screws and shall be fixed at a conspicuous
position.
7.5
Rating Plate
Each unit shall be provided with a rating plate legibly and indelibly marked with the
following :
Name of the Manufacturer and Year of Manufacture
Purchase Order Number and Date
Type, Designation & Serial Number
Rated Voltage and Current
Rated Frequency
Number of Poles
Rated Short Circuit Breaking Current
Rated Short Circuit Making Current
Short time Current for 1 sec.(kA)
3 sec. (kA)
Rated Insulation Level
Rated Operating sequence
Aux. Voltage (DC/AC)
Property Label “Property of WBSEDCL.”
7.6
DC Power Supply
For multi-panel board the provision for external DC and AC supply has to be
arranged in Incoming and Bus Coupler Panels.
Contractor shall run bus wires for providing this power supply to different cubicles of
multi-panel board.
Isolating fuse units shall be provided for incoming supplies to each Switchgear Unit.
7.7
Secondary and Small Wiring
The Contractor shall furnish and install all wiring for the equipment & devices located
on/ or within the board and wiring shall be complete in all respects so as to ensure
proper function of control (i.e. protection, metering, indicating etc.)
Fuses shall be provided to enable individual circuits to be isolated from bus wires
without disturbing the other circuits.
All wirings shall be done with flexible heat resistant switch board wires, PVC
insulated with standard copper conductor suitable for 660 Volts service. The sizes of
wires in different circuits shall not be less than those specified below:
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Table-1
Circuit
Metering and relaying circuits connected to current
Transformers
Potential circuits for metering and relaying control,
visual and audible alarm & signaling circuits
Main AC and DC Bus Wire
Table-2
The following Colour Scheme shall be used for the wiring :
Circuit where used
Red phase of instrument transformer circuits
Yellow phase of instrument transformer circuits
Blue phase of instrument transformer circuits
Neutral Connection
AC Control Wiring Circuits
DC Control Wiring Circuits
Earthing Wire
Min.
permissible
size of wire
2.5 sq.mm
2.5 sq.mm
4.0 sq.mm
Colour of
Wire
Red
Yellow
Blue
Black
Black
Grey
Green
Each wire shall be identified at both ends with same ferrule number. Cross ferruling
has to be avoided. Plastic ferrules shall be used for identification, which should
conform to IS
Ferrule marking of wires should be as follows, for :
A
B
C
D
E
F
G
H
I
J
AC circuit H1,H2, H3----------Metering Circuit D11, D 31, D 52-------O/C and E/F protection Circuit C11, C 31, C51-----REF/Differential protection Circuit A11, A31, A51----Main DC distribution Circuit J1, J2, J3--------Control and protection Circuit K1, K2, K3----Indication and Annunciation circuit L1, L2, L3---Motor Circuit M1, M2, M3------PT Circuit E11, E31, E51------Spare Contact Circuit U1, U2, U3------
The wires shall be suitably grouped in bunches by non-metallic wiring cleat or bands
with each bunch adequately supported along its run to prevent sagging due to
flexibility of vibration conforming to IS.
All wiring shall be done in such a way that it will have sufficient clearance from High
Voltage System. Other than L.T.P.T. fuse, no fuse shall be provided in the circuit
carrying power from PT secondary for metering purpose.
Sufficient bus wires shall be provided for inter connecting with adjacent units both
ways and also for future connection to additional units.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
7.8
7.9
Circuit Breaker Closing Mechanism
The circuit breaker shall be provided with motor operated spring charged closing
mechanism, anti-pumping relay and also with manually charged spring closing
mechanism trip free nature. One hand operating device shall be supplied with multipanel board equipment.
Terminal Block
Multi-way terminal blocks complete with necessary binding screws & washers for
wire connections and marking strips for terminal identification shall be furnished for
terminating cubicle wiring and outgoing cables.
The terminal block shall have at least 25% spare terminals.
The terminals shall be bolted type robust, rust-free and suitable for connection of at
least 2 nos. 2.5 mm² copper wires per terminal.
Disconnecting type terminal block has to be used in CT PT Circuit.
Test Terminal Block
3-phase, 4-wire test terminal block having brass stud shall be provided in metering
circuit for connection to 3 (Three) element, electronic energy meter The terminal
blocks and T.T.B. shall be suitable for 660 Volts service. The CT Circuit of TTB
should be disconnecting link type. Screw type CT shorting arrangement should
be avoided.
7.10
Cable Termination
HT Power Cable from LV side of power transformer shall enter in the rear bottom
portion of incoming breaker through 2 (Two) nos. rear entry cable end boxes, so
double cable termination arrangement to be provided with 2 (Two) sets of nut &
bolts.
HT Power Cable for distribution feeder shall enter in the rear bottom portion of
outgoing breaker through rear entry cable end box.
HT Power Cable for connection to shunt capacitor bank or connection to another
multi-panel switchgear shall enter in the multi-panel board equipment from side of
the panel through right angle side entry cable end box.
HT Power Cables shall be of standard 3 core XLPE type, 11 kV grade cable of
Aluminum conductor.
Maximum sizes of HT Power Cables for connection to Incoming/ Outgoing Breaker
will be as follows :
Voltage Grade
11000 Volts
Switchgear Designation
a) Incomer 2 nos.
b) Outgoing 1 no.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Size
300 mm²
300 mm²
Maximum size of cable for connection through right angle side entry cable end box
will be 300 mm² for 11000 Volts system.
Normally no rear entry cable end box shall be supplied with the equipment unless
otherwise required from design consideration. But provision shall be made for
housing, fixing and covering cable & cable end boxes in each incoming and outgoing
switchgear panel.
However, rear entry cable end boxes shall have to be provided by the manufacturer
for design consideration if cables remain exposed at the back side of the panel.
Normally 1 (one) no. right angle side entry cable end box shall be supplied with each
multi-panel shunt trip equipment for connection with bus bar of incoming breaker.
Side entry cable end box shall be complete with tubular tinned copper lugs, armour
clamp gland plate, brass gland for termination and connection of HT Power Cable in
air insulation with bus-bar of breaker through flat tinned copper extension piece. The
right angle side entry cable end box shall be supplied in detachable condition in a
separate crate.
Multi-core cable terminal box shall be provided in suitable locations at the back side
of the panels for connecting multi-core Control Cables for the following purpose.
Incoming panels External DC Supply from DCDB
External AC Supply from ACD
Remote electrical close and trip operation.
Inter trip operation from up stream circuit
Remote indication for close, trip and spring charged.
Remote indication for trip circuit condition monitoring.
Remote indication for status of Local-Remote switch position.
Remote connection for Differential/REF CT circuit
Local annunciation for remote close and trip operation.
Local annunciation for inter trip operation
Feeder panels : Remote electrical close and trip operation.
Remote indication for close, trip and spring charged.
Remote indication for trip circuit condition monitoring.
Remote indication for status of Local-Remote switch position.
Local annunciation for remote close and trip operation
Bus Coupler
External DC supply from DCDB
panels :
External AC supply from ACDB
Remote electrical close and trip operation.
Remote indication for close, trip and spring charged.
Remote indication for trip circuit condition monitoring.
Remote indication for status of Local-Remote switch position.
Local annunciation for remote close and trip operation.
External DC and AC supply arrangement to be provided in Incomer and Bus Coupler panel
only in a switch board.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
7.11
Ground Bus
A grounding bus rated to carry maximum fault current shall be furnished along the
full length of the panel board. Each stationary unit shall be grounded directly to the
ground bus.
Connectors shall be provided at two ends for connection to user‟s ground conductor.
The frame of each circuit breaker shall be grounded through heavy multiple finger
contacts at all times except when breaker primary disconnecting devices separated
by a safe distance.
7.12
Tropical Finish
All electrical equipment, accessories & wiring shall have fungus protection involving
special treatment of insulation and metal against fungus, insect & corrosion. Screens
shall be furnished on all ventilating covers to prevent entrance of foreign elements.
7.13
Painting
Modern method of painting like stove enameling or similar process as per provision
in the Indian Standard shall be followed for painting all surfaces of panel, after the
frame work is made free of scale, rust, foreign adhering mater or grease.
After cleaning the surfaces shall be given a phosphate coating followed by a coat of
high quality red oxide or yellow primer.
The equipment shall be finished in light gray with two coats of synthetic enamel paint
or powder coating as per relevant ISS.
Sufficient quantity of touch-up paint shall be furnished for application at site.
8.0
8.1
SWITCHGEAR EQUIPMENT
Circuit Breaker – Type & Rating
Circuit Breakers shall be vacuum interrupting type. All breaker units shall be
physically and electrically interchangeable. The equipment shall be floor mounted
and shall consist of stationary type, self-supporting sheet steel cubicles and draw out
type. The designation and workmanship shall permit complete interchangeability of
truck assembly.
Each breaker shall be provided with Mechanical „ON‟ & „OFF‟ facility by operating
suitable closing and opening devices. Each breaker shall be provided with
Mechanical „ON‟ & „OFF‟ indicators.
Each breaker shall have (3) positions – service, isolated and withdrawal positions
marked. Each breaker shall have mechanical indicators for spring “charged” and
spring “discharged” conditions.
Mechanical safety interlocks shall be provided so that it is not possible for a circuit
breaker :
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
To be put into the cubicle unless the truck is secured in position.
To be either raised or lowered from and to the service position unless its contacts
are safely open.
To be withdrawn or inserted in the fixed housing unless it is at the withdrawable
position.
To be operated in service position unless its primary and secondary isolating
contacts are fully engaged.
Automatic safety shutters shall be provided to completely cover the female primary
contacts, which will be disconnected when the breaker is withdrawn. Bus-bar and
feeder spout shutter screen be pad locked independently.
The circuit breaker racking equipment can be padlocked in any position.
The normal continuous current rating of circuit breaker shall be 800 Amps at 12 kV
for incoming, outgoing & Bus Coupler breaker.
Automatic tripping of the circuit breaker shall be effected by DC operated trip coil of
voltage rating as specified.
Each breaker shall be provided with electrical trip and close facility by using control
switch. Spring controlled switch with trip – neutral-close facility to be used. Electrical
close and trip operation should be dependent on Local/Remote Switch. However
protection trip and emergency trip circuit should be independent of Local/Remote
Switch.
Each breaker shall be provided with operation counter.
Vacuum interrupter for Vacuum Circuit Breaker shall be short time rated for
minimum 25 kA for 100 nos. operations.
8.2
8.3
Bus Coupler Breaker
This will be a Vacuum Circuit Breaker for coupling two sections of buses. The Bus
Coupler shall be rated for continuous current of 800 Amps. It should be
interchangeable with incomer and feeders.
Bus coupler shall be floor mounted, vacuum interrupting and horizontal draw out
type complete with transfer trucks.
The Bus coupler shall be provided with motor operated spring charged closing
mechanism, anti-pumping relay and also with manual operated spring closing
mechanism & trip free nature.
There shall not be any instrument meters.
Each Bus Coupler Breaker shall be provided with Electrical and Mechanical „ON‟ &
„OFF‟ facilities by operating suitable closing and opening devices. The Bus Coupler
shall be provided with Electrical and Mechanical „ON‟ & „OFF‟ indicators and trip
circuit healthy indications.
8.3
Current Transformers
The Current Transformers shall be mounted on the rear side stationary portion of the
unit and shall be easily accessible for maintenance and testing purpose. The method
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
of securing Current Transformer in position shall be such that no undue strain comes
on the winding/ terminals.
The Current Transformers shall be capable of safely withstanding the stresses due
to maximum short circuit current.
Each CT shall be rated to carry normal current as specified.
Current Transformer shall be free from absorption of moisture present in the air.
Universal type fixing arrangement shall be adopted for fixing all the Current
Transformers irrespective of their use as incoming or outgoing, and shall be such
that replacement of Current Transformer by any other ratio can be done without any
difficulty.
No resin casting/ compounding shall be allowed at the junction where CT primary
terminals will be connected at High Voltage Bus to facilitate easy replacement/
removal and testing of CT by way of primary injection at site without dismantling CT
from the unit.
Secondary terminals of the CT shall be easily accessible to facilitate easy
replacement/ removal and testing of CT at site without dismantling CT from the unit.
Primary and secondary terminals of the CT shall be marked properly as per
provision in the relevant standard. P1 side of CT should be in bus side in incoming
and feeder breakers. Secondary terminals should be in the P2 side of the CT.
CT shall be easily replaceable by only removing the back cover of the unit.
Each CT shall be provided with wiring diagram plate as per relevant provision of IS
showing primary and secondary terminals for connection at different ratio for
metering & protection cores.
Each CT shall be provided with a rating plate legible and indelibly marked with
following :
CT&PT Secondary Wiring should be connected in Terminal Board with round type
socket only and properly crimped.
Name of the Manufacturer and Year of Manufacture.
Purchase Order Reference No. and Date.
Type, Designation and Serial Number.
Current Ratio.
VA burden for metering and protection cores.
Short circuit level.
Class of accuracy for metering and protection cores
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Three number Current Transformers shall be provided in each Incoming Breakers
having following particulars :
i)
Type
:
Triple core, Dual ratio, Resin cast, Indoor type
ii)
Ratio
:
600-400/ 1-1-1A
iii)
Burden
:
15 VA both for protection core and metering core.
iv)
Accuracy Class
:
1.0 for metering core (core I)
5P10 for protection core (core II)
PS for special protection (core III)
v)
Other particulars
vi)
Short-time Current Rating : 16 kA for 1 seconds.
NOTE :
:
ISF < 5 for Metering core at lower ratio
For Special protection core :
Vk > 250 V at higher ratio, RCT 4 ohm at 75°C at
higher ratio & 2 ohm at lower ratio, I mag < 30 mA at
lower ratio at Vk/2
Core III CT secondary should be wired upto Multi core cable end box for
providing Differential/REF ( restricted earth fault) protection.
Three numbers of Current Transformers shall be provided in each outgoing breaker
having following particulars :
i)
Type
:
Dual core, Dual ratio, Resin cast, Indoor type
ii)
Ratio
:
200 – 100/ 1-1A
iii)
Burden
:
15 VA both for protection core and metering core.
iv)
Accuracy Class
:
1.0 for metering core (core I)
5P10 for protection core (core II)
v)
Other particulars
:
ISF < 5 for Metering core.
vi) Short-time Current Rating :
16 kA for 1 seconds.
Panel should to be supplied with CT Ratio set at higher Ratio. Ratio changing will
be done by shifting the secondary wire from S2 to S3 at CT secondary end.
Common terminals for CT secondary shall be shorted and earthed. Only ring type
socket to be used in CT Circuit. CT Terminal marking, connections & arrangement
shall be as per attached guidelines.
8.4
Potential Transformers
Each incoming breaker unit shall be provided with 3-phase horizontal draw out type
Potential Transformers satisfying the following requirement
i)
Number of phase
:
3 (three)
ii)
Ratio
:
11000 V / 110 V for 11 kV system
1.732
iii)
Vector group
:
1.732
Star / Star with neutral earthed
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
iv)
Burden
:
100 VA per phase
v)
Class of accuracy
:
1.0
vi)
Protection of HV & LV
:
HRC Fuses
vii) Over voltage factor
:
1.2 for continuous & 1.9 for 8 hrs
PT should be 3 Phase , 5 Limb or 3 single phase with star connection made to form
3 Phase PT having star point earthed for both type of PT in HV & LV side.
PT shall be resin cast/ dry type and shall be suitable in our system conditions
Each PT shall be provided with Vector diagram plate as per relevant provision of IS
showing primary and secondary terminals.
Each PT shall be provided with a rating plate legibly and indelibly marked with the
following
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
ix)
x)
xi)
Name of the Manufacturer and Year of Manufacturer.
Purchase Order Reference No. and Date.
Number of phase
Ratio
Vector group
Burden
Class of accuracy
Total weight
Short circuit level
Property label : Property of WBSEDCL.
Voltage factor
The secondary circuit from all the PTs of the incoming panels shall be wired upto all
the outgoing panels so that supply to the potential coils of the meters can be
maintained from any of the PTs.
Plug & socket type contacts shall be provided in the PT secondary. PT secondary
terminals shall be inaccessible from outside.
Necessary provision shall be made for sealing PT while at racked in position.
PT secondary fuse boxes shall be provided with sealing arrangement.
The Potential Transformer shall be mounted on rails on top of the unit and shall be
connected on the bus side. It can be plugged into and withdraw from service by
pulling or pushing the PT by the handle provided on the PT. This action shall
traverse the PT along the rails and shall automatically operate the spout shutters.
The shutter drive also forms a latch, which holds the PT in the service position and
this latch shall be required to be released before PT can be isolated.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
The body earthing of PT shall be of permanent type and shall be so designed that it
will remain earthed by bolted connection both under rack-in and rack-out conditions.
Use of flexible wire netting will be perhaps most suitable for this purpose.
PT should be suitable for use in effectively and non-effectively earthed system.
8.5
a)
Relays
Numerical Non-Directional Over Current and Earth Fault Protection Relays
The primary requirements of the relays are to protect the respective feeders in the event of fault
and when installed in a standard board formation ( i.e. incomers from transformer (s), outgoing
feeders, bus-coupler (s) etc.) in a substation, the system should additionally provide busbar
protection facilities, interlocks between panels etc. The relays should be suitable for substation
automation, primarily circuit breaker operation, through SCADA from remote Control Room.
The relay should have the following minimum specification / features and conforming to
relevant portion of IEC255 and IEC 68 standard.
1.Suitable for flush mounting on front panel of the switch cubicle to be installed in a
indoor substation.
2. The relay should be suitable to function in non AC environment having wide temperature
variation of 0 to 55˚C and relative humidity variation of 50 % to 100% throughout the
year also in presence of electrostatic, electromagnetic and transients prevailing in high
voltage system.
3. a) Relays should be suitable for both 1A & 5A CT input which can be easily selectable at
site
b) Auxiliary DC supply is 30V.
4. The relays should have the following features:
● The relay should be able to measure the following:
a) Three phase (Positive sequence) current.
b) Neutral (Zero sequence ) current.
● 3 Nos independent time delayed over current stage with IDMTL
(NI, VI. & EI) and D.T.L characteristics.
● 3 Nos independent time delayed earth fault stage with IDMTL (NI,
VI. & EI) and D.T.L characteristics.
● No of independent setting group – 2 Nos.
● Trip Circuit Supervision.
● Anti pumping feature,
● Circuit Breaker failure protection function.
● No of programmable LEDs - At least 4 Nos with latching options.
● Should be able to record at least 5 oscillographic disturbances & 5 fault records and
250 event records . All recorded / stored events, should have “Date & Time”. Tagged.
Those recording should be preserved in a non-volatile memory.
● Should have 10 programmable optically isolated inputs, 10 Programmable outputs
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
along with suitable nos. of spare B/I & B/O and with latching options. Output contacts
should be suitable for carrying close & trip coil current. & 1 watchdog contact for
supervision of healthiness of relay should also be there.
● Should have the “Time Synchronisation” facility of its internal clock by means of
pulsed through Binary Inputs or via station bus communication / GPS signals.
● Should have password protected key padlocks to allow relay setting from relay front.
● Should have comprehensive self diagnostic feature with remote indication of relay
failure and alarm shall be generated without tripping the circuit.
● Cut out diagram for “Flush mounting type” relays are to be supplied in a separate
sheet.
● The relay should be suitable for all operations required for SCADA and should also \
comply with the technical specification of the Breaker
5. Control of circuit breaker, supervision of status of spring of C.B. status of C.B are also
required
6. The offered relay shall be completely numerical with protective elements having software
algorithm based on sampling of analogue inputs. Hardware based measurements shall
not be acceptable.
7. Communication feature :
● As a minimum, one independent RS 232 , one RS 485 communication ports and one
Ethernet communication port that allow for simultaneous operation shall be
provided, to be used as follows.
a) For relay setting, modifications, extraction and analysis of faults / events /
disturbance records from a laptop through RS 232 at the front. The requirement
of the laptop should be stated in the tender.
b) To interface with remote communication equipment ( GSM GPRS/or other
suitable communication system) for SCADA.
● The remote communication protocol of the numerical relays shall be IEC 61850.
● The relays should generate GOOSE messages as per ICE 61850 standards for
interlocking and also ensure interoperability with third party relays.
● Necessary user friendly configuration tool shall be provided to configure the relays.
It should be compatible SCL / SCD files generated by a third party system.
● GOOSE signal should be freely configurable for any kind of signals using graphic
tools / user friendly open software without use of any external converter
8. The bidder is to provide the following configuration and monitoring tool free of cost :
● PC hook-up cable for direct communication -8 Nos.
● Graphical configuration tool having all functions used in the relay with sufficient
nos different logic gates in the in built library ( software) – 6 Nos
● Basic application software for setting change, service value monitoring etc –
6 Nos.
● Program for disturbance record & event logger collection and evaluation of
those records- 6 Nos.
● Any additional software, if required for remote communication and for other
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
facilities available in the relay – 6 nos.
All the above tools/software should be compatible to any of the following system:
Windows XP, Windows NT & Windows 7 operating system.
Offered Numerical Relay should have KEMA certification for validation of
ICE 61850 protocol.
At any stage of evaluation/ ordering, interoperability functions (with third party system )
of relays in IEC 61850 platform may be demonstrated free of cost, if asked by
WBSEDCL.
Competent personnel from the manufacturer should be deputed free of cost during
commission of the system at six nos of locations situated at any part of the state of
West Bengal.
This
Relay
should
be
of
Reyrolle/Areva/ABB/Siemens etc.
b)
reputed
make
such
as
Easun
Auxiliary Relay for Tripping Function
High speed continuously rated self reset voltage actuated auxiliary relay having
normally open self reset contacts capable to make, carry and break trip coil
current of Circuit Breaker.
c) Trip Circuit supervision relay having two no. normally close contact to be
provided in each incoming and feeder panels.
d)
e)
8.6
Annunciation Scheme
An annunciator to be provided in each panel except Bus Coupler panel. The
annunciator should be
Micro
processor based
with
inbuilt
Accept/Reset/Test/Mute push buttons for trip & non-trip functions. DC operated
common Hooters shall be provided in Bus Coupler breaker panel. The
Microprocessor based annunciator shall have provision of built in Watch Dog
and Fast fault indication with Trip and Non Trip Alarm functions. 4 (Four)
window annunciator to be used in each panel.
All relays shall be of flush type and the same shall be mounted on man height
for easy accessibility to reset mechanism by hand, standing on the floor of
Control Room Building.
Meters and Metering Accessories
a)
Ammeter
One number Digital Ammeter (96 mm², nominal current : 1A) flush type for
each phase, shall be provided on each incoming and outgoing breaker panel.
All Ammeters shall be suitable for direct reading and calibrated according to CT
ratio of 200/1
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Ammeters shall be connected from metering circuit of CT Secondaries.
b)
Voltmeter
One number of Digital Voltmeter : (96 mm², nominal voltage 110 KV) flush type
shall be provided on each incoming breaker panel. The Voltmeter shall be
suitable for direct reading of 0 to 15 kV and calibrated according to PT ratio of
the unit.
c) Voltage Selector Switch
One number Voltmeter Selector Switch having wing type knob and positions
marked RY – YB – BR - OFF shall be provided in each incoming breaker panel
against each Voltmeter.
d)
e)
DC Volt Meter :
One analog DC Volt meter to be provided in Bus Coupler panel with scale from
0 to 40V DC, with Red Marking for 0 to 25 & above 34 Volts. Green marking
for 25 to 34 Volts
Test Terminal Block
Standard Test Terminal Block with cover having sealing arrangement for 3phase 4 wire metering system shall be provided in all incoming and outgoing
breaker panel for connection to energy meters. TTB should be disconnecting
link type .
f)
Energy Meter
One 3 phase, 3 wire CT/PT operated, fully static AMR Compatible,
TRIVECTOR Energy Meter shall have to be provided in all incoming / outgoing
breaker panel at its upper most position.
Necessary wiring shall have to be drawn from Test Terminal Block for Energy
Meter connections.
8.7
Control Switch
Control switch for circuit breaker shall be of three position, (N-I-T), spring return type
with suitable robust handle and sequence device to ensure that manual pumping of
closing solenoid is not possible. The switch shall be of robust construction and shall
have five effective contact positions, such as Close/After Close/Neutral/After
Trip/Trip position.
Contacts required are as follows : 1 no. close contact
Trip Circuit : 1 no. Trip Contact
Auto Trip Circuit : 1 no. Normal Contact and 1 no. After Close Contact
Local Remote Switch :
One no. Local – Remote switch to be provided in each panel for electrical close and
trip operation. This switch should be robust construction and lockable type. In addition
to the contacts required for closing and tripping circuit, additional one contact is
required in both Local and Remote position for monitoring switch position from remote
end.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
8.8
Indicating Lamps and Push Buttons
Indicating Lamps
Claster LED type Indicating Lamps with built in series resistor holder and coloured
lens shall be provided in incoming/ outgoing/ bus coupler breaker panel mentioned
below :
Rating
Quantity
Function
Circuit Breaker „ON‟ indication
Circuit
Breaker
„OFF‟
indication
Trip circuit healthy indication
for pre & post close
Supervision
Circuit
Breaker
spring
charged indication
Auto trip indication
1 no.
each
1 no.
each
30V DC
30V DC
1 no.
each
30 V D C
1 no.
each
1 no.
each
30 V DC
30 V DC
Colour of
Lens
Red
Green
White
Blue
Amber
All the Indicating lamps as mentioned in above table, shall be provided in all
incoming and outgoing breaker panels. The bus coupler panel shall be provided
with all the indications except the last one.
Push Buttons
Standard Push Buttons having Red coloured knob and required number of N/O &
N/C self returning contacts without locking arrangements for Emergency Trip
functions shall be provided in all the panels.
8.10
Trip & Closing Coil
Trip Coil & closing coil shall be provided for tripping & closing the breaker through
actuating device rated for sub-station DC voltage. It shall be suitable for operation at
minimum operating voltage of 70% for Tripping and 85% for Closing operation. Trip
coil and closing coil burden shall be less than 200 watt.
8.11
Auxiliary Switch
Auxiliary switches properly rated and robust in nature shall be provided in incoming/
outgoing and in bus coupler breaker. Auxiliary switches shall have sufficient number
of normally open and normally closed contacts for following functions :
Type of Contact
Function
Circuit Breaker „ON‟, local indication
Circuit Breaker „ON‟, remote indication
Normally open
Normally open
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Panel
Incomer, Feeder, Bus
coupler
Incomer, Feeder, Bus
coupler
Circuit Breaker „OFF‟ local indication
Circuit Breaker „OFF‟ remote indication
Circuit Breaker Auto trip indication
Spare contacts
Normally close
Normally close
Normally close
2 NO & 2 NC
Incomer, Feeder, Bus
coupler
Incomer, Feeder, Bus
coupler
Incomer, Feeder
Incomer, Feeder, Bus
coupler
All breakers shall have number of auxiliary switches and shall be wired upto SIC
(Secondary Isolated Contact) with identical SIC and ferrule numbers.
8.12
Insulated Spacer
Insulated Spacer made of insulated fibre glass materials shall be provided in High
Voltage System to protect from absorption of moisture present in the air.
8.13
Insulation Level
8.14
Insulation level of High Voltage components of panel shall comply with the latest
applicable standards and shall be suitable for use in 11 kV System.
Space Heater
Each cubicle shall be provided with a Space Heater – 60 W 230 V AC, operated with
controlling tumbles and thermostat.
8.15
a)
DC Circuit
There shall be only one DC Incomer for the entire multi-panel board through a
suitable 32 Amps double pole MCB. A continuous DC bus shall be provided in
the entire multi-panel switchboard for control, protection, indication and for
common annunciation scheme. DC supply should be fed to in each panel for
above purpose through a set of fuses on positive & negative side for control,
protection, trip circuit healthy indication and also a set of fuse & link for
common annunciation scheme.
b)
AC Circuit
230 V single phase AC supply to the entire multi-panel board shall be fed from
AC Distribution Board through suitable 16 Amps Double pole MCB. A
continuous AC bus shall be drawn in the entire multi-panel switchboard for
indication and supply to heater circuit. AC supply shall be fed to in each panel
for above purpose through a set of fuse and link.
c) PT Selection scheme
Each incoming and outgoing breaker panel shall be provided with suitable
manually operated selector switch having break before make type contacts
including necessary wiring for selection of voltage from different PT
secondaries available for connection with energy meters. Voltmeter of incoming
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
breaker panel shall be connected directly from respective PT secondary of
associated unit. Each panel should be provided with 3 PT scheme and current
rating should be minimum 16 Amp..
8.15
GENERAL REMARKS :
(1) The Schematic diagram of control and indication circuit on a durable sticker
shall be fixed in a suitable place in incomer and feeder panels , and
annunciation scheme in the Bus Coupler panel.
(2) The wiring arrangement, position of Fuses, Terminal Block etc. in the panel
should be such that each and every connection can be accessed easily,
Fuse tops can be opened / inserted easily.
(3) Only Ring type sockets should be used wire termination in TB/ Relays/
Meters/ TTB etc. Fork type socket can be used in Annunciator only
(4) Separate switch to be used for cubicle light instead of Door- Switch.
.
8.16
Name, Rating, Property Plates, Circuit Label and Connection Diagram
Name and rating plates of circuit breaker, PT & CT shall give all information as
mentioned in the relevant clauses of specifications.
Property plate mentioning “Property of WBSEDCL” shall be provided.
Circuit label incorporating identification, information of incoming/ outgoing /bus
coupler breaker shall be provided.
Connection diagram plates for the PT & CT shall be provided as per provision in the
relevant Indian Standards.
All name, rating, circuit label, connection diagram plate shall be fixed with screws or
by rivetting instead of fixing by adhesive.
8.17
Equipment Device Schedule
Equipment device schedule of multi-panel board is enclosed in Annexure II.
8.18
Accessories
The following sets of accessories shall be furnished for multi-panel board :
a)
1 (one) no Spring Charging handle for every 3(Three) no. panel.
b)
1 (one) no Breaker Truck Operating Handle for every 3(Three) no panels
c)
Full set of special tools required for operation and maintenance.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
9.0
9.1
TEST
Routine & Acceptance Test
Each Breaker panel including all accessories shall be completed, assembled, wired
up, adjusted and Routine tested as per relevant Indian Standard Specification.
Circuit Breaker/ Bus Bar/ Cable End Box
Instrument Transformers
Relays, Instrument and Meters
9.2
Type Test
The Bidder shall submit complete Test Reports of all tests (including Type Test), as
stipulated in the relevant IS/IEC, carried out in a CPRI/NABL accredited/Govt. recognised
Test House or Laboratory on 12 KV, 800A, 16 KA Floor Mounted Indoor Type Totally
Enclosed Shunt Trip Metering Switchgear with Vacuum Circuit Breaker Unit of identical
design. The submitted Test Reports shall amply prove that the Tests have been carried out
within 5 years from the due date of Tender.
COPIES OF FOLLOWING TYPE TEST REPORT AS PER LATEST IS/IEC, CARRIED OUT
WITHIN FIVE (5) YEARS, FROM DUE DATE OF TENDER, FROM CPRI, NABL
ACCREDITED/GOVERNMENT RECOGNISED TEST HOUSE OR LABORATORY SHALL
BE SUBMITTED ALONG WITH TENDER DOCUMENTS AS PRE-REQUISITES, FAILING
WHICH THEIR OFFER MAY NOT BE TECHNICALLY ACCEPTABLE :
a)
b)
c)
d)
e)
f)
9.3
Basic Short Circuit Test for different duty cycles
Short time Withstand and Peak Withstand Current Test
Lightning and Switching Impulse Voltage Withstand Test
Temperature Rise Test
Mechanical Endurance Test as per IEC
Internal Arc Test
Test Witness
Tests shall be performed in presence of purchaser‟s representatives if so desired by
the purchaser. The Contractor shall give at least 15 (fifteen) days‟ advance notice of
the date when the tests are to be carried out.
Purchaser shall have the right to select any incoming/ outgoing/ bus coupler breaker
panel for type testing from the equipment offered for inspection and in the event of
any failure in type test, the purchaser shall have the right to reject the whole lot
and/or else any subsequent order placed on the supplier.
9.4
Test Certificates
6 (six) copies of Routine & Type Test Reports shall be furnished to the Purchaser for
approval before despatch of any equipment from the works.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
10.0
DRAWINGS, DATA AND MANUALS
10.1
The following drawings and details shall be furnished with the tender :
General Arrangement Drawing showing constructional features and space required
in the front for withdrawal of breaker truck and in back, other accessories, power and
control cable entry points etc. with plan, elevation and views.
Cross sectional features of the individual items/ components.
Wiring diagram and connection details of the control, protection, indication, metering
etc.
Mounting arrangement with foundation details for installation of equipment.
Manual for installation, operation and maintenance procedures.
Technical leaflets on :
Relays / Meters/ Switches
Incoming / Outgoing / Bus Coupler Breaker
Instrument Transformers
Terminal blocks / Connectors and Test Terminal blocks
10.2
a)
Four Copies of drawings, data and manuals shall be submitted for approval and
afterwards for final distribution. The various drawings, data and manuals to be
furnished shall include :
i)
Outline dimensional drawing of the breaker showing general arrangement
and indicating the space required in the front for withdrawal, power and
control cable entry points etc.
ii)
Cross-section with parts list.
iii)
Control schematic.
iv)
Foundation plan and loading.
v)
Wiring diagram with terminal board disposition.
vi)
Installation, operation and maintenance manual of the associated
equipment such as breaker, relays etc.
The manuals shall clearly indicate the installation method check-ups & tests to
be carried out before and after commissioning the equipment.
b)
Two sets of manuals, leaflets and two sets of drawings for multi panel board
shall be submitted separately to the CE (Testing), Distribution Testing
Department, WBSEDCL.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
c)
In addition, every set of the panel shall also contain in water proof folder one
set of drawing, manual and leaflet for operation, maintenance and
commissioning at site.
10.3
Before starting manufacture of the equipment, the Contractor shall have to take
approval of the design drawing from the Purchaser. Any manufacturing done prior to
approval of drawing shall be rectified by the Contractor at his own cost if any
discrepancy arises.
11.0
SPARE PARTS
11.1 The Tenderer shall submit a recommended list of spare parts for five years of
operation along with item-wise price for each item of spares.
11.2 Rate of Relays, C.T., PT, Ammeter, Voltmeter, Annunciator, Control Switch,
Local-Remote Switch etc.to be quoted separately.We may procure these Items as
Spares from the successful Bidders.
12.0
DEVIATION
Should the Tenderer wish to depart from this specification in any way, he shall draw
specific attention to such departure.
All such departures shall be clearly mentioned in the deviation sheet with reference
to respective clauses of the specification. Statement such as “see covering letter”
is not acceptable.
Unless such deviations are recorded in the deviation sheet and submitted with
the offer, it will be taken for granted that the offer is made in conformity with
the specification.
13.0
GUARANTEED TECHNICAL PARTICULARS
Tenderers shall furnish Guaranteed Technical Particulars of equipment offered as
per schedule specified. Performance Guarantee will be based on the Guaranteed
Technical Particulars.
14.0
VALIDITY PERIOD
Validity period of the offer shall be reckoned from the date of opening of the tender
provided it is technically and commercially complete one, otherwise it will be counted
from the date of receipt of complete information.
15.0
TERMS AND CONDITIONS
a)
The price to be offered should include loading at works, transportation and
unloading at consignee stores by road.
b)
Make of Meters and Relays (to be provided) are to be furnished.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
wever the
The price for rear entry cable end box, if required for design consideration, shall be
quoted separately.
If specified, space heater shall be provided. Price for such provision shall be quoted
separately also.
16.0
17.0
18.0
The equipment should be supplied duly packed.
PERFORMANCE CERTIFICATE
Copy(ies) of Performance Certificate(s) of similar equipment supplied to the user(s)
like WBSEB/WBSEDCL/Other Power Utilities/Other Govt. Department in earlier
occasions against Orders already executed shall have to be furnished (in triplicate)
along with Tender.
CREDENTIALS
Tenderer shall furnish document in support of Supply and Delivery of similar
equipment to WBSEB/WBSEDCL/Other Power Utilities/Other Govt. Department in
earlier occasions. Copies of Purchase Orders and Copies of Inspection Offer Letter,
Copies of Despatch Instruction, Copies of Signed Challan in support of execution of
Order(s) are to be furnished in support of Credential.
TYPE TESTS after issuance of order :
Besides submission of Type Test Report, carried out within five years as per
Tender Specification, Type Test at the discretion of Ordering authority, shall
have to be arranged by the successful contractor from any lot offered for
inspection, sample chosen at random after successful Routine Test by our
Inspection Team, as per relevant ISS from CPRI/NABL accredited/ Government
recognized Test House or Laboratory in presence of WBSEDCL‟S representative.
However the necessary cost of the Type Test charges will be reimbursed
to the party on production of necessary supporting documents.
19.0 Documents to be submitted at the time of physical delivery at consignee stores :
The following documents to be submitted by the Vendors to the Consignee Stores at
the time of physical delivery :a) Copy of Purchase Order.
b) Copy of Despatch Instruction.
c) Inspection Test Certificate.
d) Guarantee Certificate.
e) Proforma Invoice.
f) Calculation Sheet for price Variation on the basis of IEEMA or CACMAI as
applicable with base date of order.
g) Seal list and packing list.
h) Challan in triplicate.
i) Way bill, if applicable.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Annexure-I
LEGEND OF DEVICES ASSOCIATED WITH MULTI-PANEL SHUNT TRIP
VACUUM CIRCUIT BREAKER
Symbol
Reference
Description
A1-A2-A3 Ammeter
V
Voltmeter
VS
Manual Voltmeter Selector switch
EM
Tri-Vector Meter
CS
Control Switch T-A/T-N-A/C-C spring return type
IL-R
Circuit Breaker „ON‟ indication Red Lamp
IL-G
Circuit Breaker „OFF‟ indication Green Lamp
IL-W
Trip Circuit Healthy Indication White Lamp
IL-B
Spring Charged Indication Blue Lamp
IL-A
Circuit Breaker Auto Trip indication - Amber
PB
Push Button
Particulars
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
As
specified
DC operated Electric Buzzer and Microprocessor based
Electronic Annunciator with built in watch dog and first fault
As
ANN
indication facility. The annunciator shall have provision for Trip &
specified
Non Trip Alarm functions and Accept/ Test/ Reset/ Mute Push
buttons.
H,
HS,
As
Heater, Heater Switch, Thermostat
TH
specified
As
FS
Fuse
specified
As
LK
Link
specified
MCB 2 pole 32 A for DC supply
As
MCB1
specified
MCB 2 pole 16 A for AC supply
As
MCB2
specified
As
MCB3
MCB 2 pole for Spring Charging Motor
specified
As
MVS
Manual PT Selector Switch
specified
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Symbol
Reference
IR-I
TC
CC
APR
86
52
52a, 52b
PT
CT
TTB
51/50
R-Y-B-N
Description
Particulars
Remote inter tripping contact from 33 kV Transformer Control As
and Relay Panel
specified
As
Tripping Coil
specified
As
Closing Coil
specified
As
Anti-pumping Relay
specified
As
Tripping Relay for tripping function
specified
As
Vacuum Circuit Breaker
specified
As
N/O and N/C Contacts of Breaker Auxiliary Switch respectively.
specified
As
Potential Transformer
specified
As
Current Transformer
specified
As
Test Terminal Block of Metering circuit
specified
As
O/C & E/F protection.
specified
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Annexure-II
Sheet-I
Equipment Device Schedule of Incoming, Outgoing and Bus coupler Breaker of Multi-Panel Switch Board.
Quantity
Description of Device
Incoming Outgoing
Bus Coupler
Switchgear Switchgear
Sheet steel, totally enclosed metal clad, suitably isolated,
horizontal draw-out type extensible single bus-bar Indoor
Vacuum Circuit Breaker Panel complete with bus-bar
mechanical interlocks, earthing bar, small wiring with
numbering ferrules, foundation bolts & nuts conforming
to Indian Standard for installation in effectively earthed
distribution system having following major devices :
Side frame with housing for circuit breaker carriage
1 set
1 set
1 set
Mechanical interlocks and automatic safety shutter
1 set
1 set
1 set
Isolating plug and socket
As required. As required. As required
Circuit breaker carriage fitted with Vacuum Interrupter
and complete with self-contained racked in & out
1 no.
1 no.
1 no.
mechanism for isolation purpose and mechanical
interlock.
Air insulated bus-bar chamber including 3-phase,
1 set
1 set
1 set
electrolytic copper bus-bar
Interchangeable type, triple pole trip-free Vacuum Circuit
Breaker fitted with motor operated spring charged closing
mechanism, anti-pumping relay with hand operated
mechanism complete with mechanical „ON‟ & „OFF‟
1 set
1 set
1 set
indication, spring charged and discharged indication,
control switch, operation counter, trip device & adequate
number of breaker operating auxiliary switches, selfaligning auxiliary plug and socket & shunt trip coil.
Tripple core, dual ratio CT for metering and protection
3 nos.
purpose with CTR 600-400/1-1-1
Dual core, dual ratio CT for metering and protection
3 nos.
purpose with CTR 200-100/1-1
Single phase resin cast draw-out potential transformer
3 nos.
complete with HT & LT fuses.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Sheet-II
Description of Device
Relays
a) Numerical Non-Directional Over Current and Earth
Fault Protection Relays: 4-element normal inverse with
definite minimum time non-directional microprocessor
based over current and earth fault relay. 3 nos. over
current elements & 1 no. earth fault element.
b) Trip Relay
c) Ttrip Circuit Supervision Relay
d) Annunciator
e) DC Voltage operated electronic buzzer
Meters & Metering Accessories
a) Ammeter
b) Voltmeter
c) Voltage selector switch having provision of wing type
knob and positions marked RY-YB-BR-OFF
d) DC Voltmeter
e) Energy Meter (TVM)
f)Test terminal block with cover having sealing
arrangement
Indicating Lamp
a) LED type indicating lamp with built in series resistor,
holder and coloured lens : 30 V DC for breaker „ON‟ &
„OFF‟ indication.
b) LED type indicating lamp with built in series resistor,
holder & colour lens : 30 V DC for trip circuit healthy
and spring charged indication & Auto Trip indication.
MCB : 2 pole, 16 Amps for incoming AC supply
Quantity
Incoming
Outgoing
Switchgear Switchgear
Bus
Coupler
1 no.
1 no.
-
1 no.
1 no.
1 no.
-
1 no.
1 no.
1 no.
-
2 nos.
3 nos.
1 no.
3 nos.
-
-
1 no.
-
-
1 no.
1 no.
1 no.
-
1 no.
1 no.
-
2 nos.
2 nos.
2 nos.
3nos.
3 nos.
2 nos.
1 no.
-
1 no.
As required
As required
As required
1 no.
1 no.
-
1 no.
1 no.
1 no.
1 no.
-
-
1 no.
1 no.
-
1 no.
-
1 no.
Operating handle
MCB : 2 pole, 16 Amps for incoming DC supply
1 no.
-
1 no.
1 no.
-
1 no.
Breaker control switch spring return type
1 no.
1 no.
1 no.
Fuses and Links
Manual PT selector switch with 3 (Three) position
(PT1/PT2/PT3)
Heater – 60 W, 230 V AC with switch and thermostat
Right angle side entry cable end box
Rear entry cable end box, if required from design
consideration to be supplied as additional item
Manual spring charging operating device.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Local – Remote Switch
1 no.
1 no.
1 no.
ANNEXURE-TS-III
WEST SBENGAL STATE ELECTRICITY DISTRIBUTION COMPANY LIMITED
SCHEDULE OF GUARANTEED TECHNICAL PARTICULARS & OTHER INFORMATION FOR INDOOR
TYPE SHUNT TRIP SWITCH GEAR WITH VCB (SCADA COMPATIBLE FACILITIES)
The Tenderer shall furnish the technical particulars below for Multi Panel Vacuum Circuit
Breaker without which the Tender shall be considered as incomplete.
A.
General :
1.
2.
Maker‟s Name.
Company Address :
a) Office
3.
4.
5.
6.
7.
8.
9.
10.
11
12.
B.
1.
b) Factory.
Applicable Standard.
Type & Designation.
Rated Voltage.
Phase.
Frequency.
Rated Normal Current.
Rated Short Circuit withstand capability
for 3 Seconds.
Rated Making Current
Insulation Level :
a) Power frequency Withstand
Voltage
b) Impulse withstand k Voltage
1.2x50 micro second wave crest
Temperature Category.
Buses :
Bus Conductor :
a) Manufacturer.
b) Material.
c) Reference Standard.
d) Size.
e) Shape
f)
Cross Sectional Area Sq .mm.
g) Minimum Clearance of Rate Bus
and Connections.
i) Phase to Phase mm.
ii) Phase to Ground mm.
h) Busbars provided with
i) Insulating Sleeve.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
ii) Insulating Barriers.
i)
j)
K)
l)
m)
n)
o)
p)
2.
Current Rating :
i)
Rated Current Amps (r.m.s.)
ii) De-rated Current due to site condition
and 50 deg. Ambient Amp. (r.m.s.)
iii) 1 Sec.-KA (r.m.s.)
3 Sec.- KA (r.m.s.)
Temperature rise over 50 Deg.C
Ambient for rated current Deg.C
Current Density-A/Sq.mm.
Short-Circuit Force-Kg/m.
Support Spacing mm.
Voltage Drop at Rated Current- V/m
Weight per metre mm.
Type of Plating.
Bus Support Insulator
a) Make
b) Type
c) Reference Standard
d) Voltage Class
e) Dry withstand Voltage for 1 min. KV rms
f)
Weight withstand Voltage for 1 min. KV rms
g) Impulse withstand Voltage KV
h) Minimum Creepage distance mm.
i)
Cantilever Strength Kg
j)
Compression Strength Kg
k) Tension Strength Kg
l)
Weight of Each Insulator Kg
m) Insulator Mounting resilient or rigid
n) Calculation of Short Circuit Force withstand
Capability- furnished: Yes/No
C. Circuit Breaker :
1. Make
2. Type & Service
3. Reference Standard
4. Rated Voltage (Nominal/Highest)
5. Frequency
6. Poles
7. Current Rating.
a) Rated Current Amps.(r.m.s.)
b) Derated current due to site conditions &
50 Degree C Ambient Amps (rms).
c) 1 Sec. Thermal rating KA (r.m.s.)
d) Momentary KA (peak)
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
8.
9.
I)
II)
10.
11.
12.
13.
14.
15.
16.
17.
Temperature rise over 50Deg.C.Ambient Deg.
C.
Interrupting Capacity based on duty cycle
Duty Cycle :
a) Symmetrical KA (rms)
b) Symmetrical MVA at rated voltage
c) Asymmetrical (KA if any)
Rated Breaking Capacity :
a) Single Phase Capacitor Breaking Capacity
(Amps.)
b) Three Phase Capacitor Breaking Capacity
(Amps.)
c) Line Charging Breaking Capacity (Amps.)
d) Cable Charging Breaking Capacity
(Amps.)
Making Current :
a) Peak KA
b) rms Symmetrical KA
Interrupting time at 100% Capacity :
a) Arcing time mili sec.
b) Total length of Arc mm.
c) Total interrupting time (measured from trip
coil energisation cycles)
No. of Breaks per Phase.
Length of Contact travel mm.
Total length of Breaks per Phase mm.
Rate of Contact travel cm/sec.
Endurance Capacity :
a) Mechanical.
b) Electrical.(fault clearing operation)
Vacuum Bottle Particulars :
a) Rated Voltage.
b) Normal Current
c) Short time Current.
i)
Symmetrical.
ii) Asymmetrical.
d) Making Current.
e) Total Weight.
f) Contact Force due to atmospheric
pressure.
g) Maximum Contact separation length.
h) Maximum Contact erosion.
i) Average Opening speed.
j) Closing Speed at contact touch.
k) Maximum allowable over travel.
l)
Maximum allowable contact bounce
duration.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
18.
19.
20.
21.
22.
23.
m) Maximum allowable contact chattering
duration.
n) Mechanical life in no. of operation
o) Minimum electrical life in no. of operation.
i)
At rated normal Current.
ii) At rated Symmetrical Short Circuit
Current.
iii) At 25% rated Symmetrical Short
Circuit Current.
iv) At 50% rated Symmetrical Short
Circuit Current.
p) Name and Address of the bottle
Manufacturer with mention of type.
Insulation Level of Breaker :
a) One min. dry withstand KV (rms.)
b) Impulse withstand KV (peak)
Type of Contacts :
a) Main.
b) Arcing.
Material of Contacts :
a) Main.
b) Arcing.
c) Type of Plating.
d) Thickness of Plating.
e) Contact Pressure.
Minimum Clearance :
a) Between live parts and ground.
b) Between Poles.
Type of Operating Mechanism :
a) Closing.
b) Tripping.
c) Particulars of Spring Charging Motor
i) capacity
ii) voltage
iii) wheel Meter
iv) wattage
Voltage and power requirement of operating
mechanism
a) Operating voltage nominal minimum
i) closing
ii) Tripping
b) Power requirement Watt/VA duration
i) closing
ii) Tripping
c)
Allowable range of
control voltage variation
for Closing/ Tripping.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
24. a)
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
Current required for
tripping & closing
(Amps).
b) Time of Opening &
Closing in sec.
No. of Auxiliary Contacts :
a) NO contacts.
b) NC contacts.
Aux. Contacts rating in
Amps.
i) AC
ii) DC (inductive)
iii) DC inductive breaking
current.
Allowable range of Aux.
Contact Voltage
Mechanical Safety Interlock
furnished
Details of mechanical
electrical interlock to be
provided.
Type of Isolation.
Net Weight of Circuit
Breaker.
Impact of Foundation design
to maximum interrupting
rating.
Overall dimentions
Tests :
i) Routine test to be
performed
a)
b)
c)
d)
e)
ii)
D.
Type Test Certificate
furnished
iii) Type Test performed on
indigenous Breaker
Current Transformers :
1. Make
2. Type
3. Reference Standard
4. Voltage
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
5.
6.
7.
Frequency
Rated VA Burden
Accuracy Class :
a) Class of Insulation.
b) Temperature rise above
50 Deg. Ambient Degre.
c) Insulation Level KV
(peak/rms)
8.
E.
F.
a) Short time current rating for 1 sec. (KA)
b) Dynamic current rating KA peak
c) Accuracy limit factor
d) Instrument security factor
9. Magnetising curve furnished.
Potential Transformers :
1. Make
2. Type
3. Reference Standard
4. Frequency
5. a) Rated Primary Voltage
b) Rated Secondary Voltage
c) Winding Connection.
6. a) Rated VA Burden per Phase.
b) VA Burden Thermal Limit.
7. Accuracy Class :
8. a) Class of Insulation.
b) Temperature Rise above 10 Deg.C
9. Over Voltage Factor.
10 Overall Dimension.
.
11 Weight.
.
12 Fuses L:
.
a) H.V.
b) L.V.
Protective Relays : Leaflet and Catalogue showing the technical particulars characteristics
curves contact numbers and rating. Reference Standard etc. shall have to be furnished in
the tender and details shall be given as follows :
Sl.No
Type of Relay
.
1.
IDMT over current & earth
fault relay(as per Sl. No.8.5 of
the Specification).
2.
Microprocessor based
electronic Annunciator.
Make
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Type
Range
Catalogue No.
3.
4.
Anti Pumping Relay.
Tripping Relay.
G.
Meters
1.
Make.
2.
Type
3.
Reference Standard
4.
Scale
5.
Burden.
6.
Accuracy Class.
H.
Push Button :
1.
Make
2.
Type
3.
Catalogue No.
4.
Contact Rating.
5.
Colour
I.
Switch :
1.
2.
3.
4.
5.
Ammeter
Ammeter
Selector
Switch
Make
Type
Catalogue No.
Dimensions.
Contract Rating
J.
Lamps :
1.
Make
2.
Type
3.
Catalogue Reference No.
4.
Rating
a) Amps
b) Wattage
5.
Resistance.
K.
Operation Counter :
1.
Make
2.
Type
3.
Catalogue Reference No.
4.
Ranges
5.
Facilities
L.
Breaker Assembly:
1.
Type of Breaker
2.
Type of enclosure.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Voltmeter
Voltmeter
Selector
Switch
Breaker
Control
Switch
3.
4.
Thickness of sheet metal plate.
Type of Indicators provided for
Breaker position.
Insulation Level :
Impulse withstand in earth and
between Phase KV
1 Min. Power Frequency
withstand Voltage KV rms.
Space Heater
Space heater furnished for each
cubicle.
Voltage.
Watts.
Trip Coils & Closing Coil :
Rating :
i) Amps.
ii) Wattage
Burden
Time of Operation.
5.
a)
b)
6.
a)
i)
ii)
7.
a)
b)
c)
8.
M
a)
Ground Bus furnished all the
equipment assembly
b) Material & Size.
9. Small Wring.
a) Type & Size
b) Insulation.
c) Voltage Class
d) Colour configuration
Overall Dimensions :
a) Length mm
b) Depth mm.
c) Height mm.
N.
Approximate Weight :
O.
Painting Details :
P.
Assembly & Tests :
Equipment to be completely assembled in the Factory and
all details checked.
Q.
Applicable Standards :
R.
Shipping Dimensions :
a) Length mm
b) Depth mm.
c) Height mm.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
S.
T.
Particulars of Accessories to be provided
Information about compliance of
provisions.
1.
a)
b)
c)
2.
3.
4.
5.
State clearly about compliance of following provisions as per
provision in relevant Clauses of Specification.
Name, Rating, Making, Property Plate, Circuit Level,
Connection Diagram.
Operation Instruction Chart.
Operating Handle.
State clearly information about type testing of similar
Equipment in recognized Institution. If yes, mention
clearly nature of tests carried out with Name of
Testing Institution.
Information about testing facilities available at the
Manufacturer‟s Works for conducting
Routine/Acceptance Tests.
Information about submission of following documents
with the Tender
a)
Copies of Type Test Reports.
b)
Copies of Tender Drawing Literature & Manual.
c)
Copies of Performance Reports & Credential.
d)
Copies of Literature & Leaflets of Device.
e)
List of Recommended Spares.
Information about submission of Deviation Sheet.
Date:
Signature :
Name:
Designation
Company Seal:
Place
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
B TECHNICAL SPECIFCATION FOR 3 PHASE 3 WIRE CT/PT OPERATED
FULLY STATIC AMR COMPATIBLE TRI-VECTOR ENERGY METERS FOR
11KV FEEDER METERS RELATED TO 11 KV SWITCHGEARS
1.0 SCOPE
Design, manufacturing, testing, supply and delivery of AC, 3 Phase, 3 Wire, CT/PT operated
fully Static and AMR compatible Tri-Vector Energy Meters for measurement of different
electrical parameters listed elsewhere in the document including Active Energy (KWH), Reactive
Energy (KVARH), Apparent Energy (KVAH) etc. The detail scope is given below.
2.0 APPLICATION
In Substation on incoming / Outgoing HT feeders (Category – A Meter).
3.0 STANDARDS TO WHICH METERS SHALL COMPLY
Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control –
Companion Specification” enclosed with this document as annexure.
IEC 62056-21 Electricity metering: Data exchange for meter reading, tariff and load control- Part
21: Direct local data exchange
IEC 62056-31 Electricity metering: Data exchange for meter reading, tariff and load control -Part
31: Local Area Network data exchange
IEC 62056-61 Electricity metering: Data exchange for meter reading, tariff and load control- Part
61: Object identification system (OBIS)
IS-14697 Specification for AC Static Transformer operated Watt Hour & VAR-Hour meters
(class 0.5S);
IEC 62052-11 Electricity metering equipment (AC) –General requirements, tests and test
conditions -Part 11: Metering equipment;
IEC 62053-22 Electricity metering equipment (AC) –Particular requirements - Part-22: Static
Meters for Active Energy (Class 0.5S);
IS-15707 Specification for Testing, evaluation, installation & maintenance of AC Electricity
Meters-Code of Practice.
The equipment meeting with the requirements of other authoritative standards, which ensure
equal or better quality than the standard mentioned above, also shall be considered; in case of
conflict the Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control
– Companion Specification” enclosed with this document as annexure shall prevail upon.
4.0
1
GENERAL TECHNICAL REQUIREMENTS
TYPE
AMR Compatible Static, 3 Ph, 3 Wire(11KV) Tri-Vector
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
2
3
4
5
6
7
8
9
5.0
FREQUENCY
ACCURACY
CLASS
SECONDARY
VOLTAGE
BASIC CURRENT
(Ib)
MAXIMUM
CONTINUOUS
CURRENT
POWER
CONSUMPTION
POWER FACTOR
DESIGN
Energy Meter
50 Hz ±5%
0.5S
Suitable for operation from 110V Ph-Ph (11KV)
-/1 Amp as per existing CT for -11KV feeders
2.0 Ib; Starting and Short time current shall be as per IS14697
The active and apparent power consumption, in voltage
circuit, at reference voltage, reference temperature and
reference frequency shall not exceed 1. 5 W and 8 VA.
The apparent power taken by current circuit, at basic current,
reference frequency and reference temperature shall not
exceed 1.0 VA
0.0 Lag -Unity- 0.0 Lead
Meter shall be designed with application specific integrated
circuit (ASIC) or micro controller; shall have no moving part;
electronic components shall be assembled on printed circuit
board using surface mounting technology; factory calibration
using high accuracy (0.05 class) software based test bench.
Assembly of electronic components shall be as per ANSI
/IPC-A-610 standard.
CONSTRUCTIONAL REQUIREMENT/ METER COVER & SEALING ARRANGEMENT
Wherever poly carbonate cover is specified, it shall conform to IS 11731 (FH-1category) besides
meeting the test requirement of heat deflection test as per ISO 75, glow wire test as per the
IS:11000 (part 2/SEC-1) 1984 OR IEC PUB,60695-2-12, Ball pressure test as per IEC--6069510-2 and Flammability Test As per UL 94 or As per IS 11731(Part-2) 1986
5.1
CONSTRUCTION
The case, winding, voltage circuit, sealing arrangements, registers, terminal block, terminal
cover & name plate etc. shall be in accordance with the relevant standards. The meter should
be compact & reliable in design, easy to transport & immune to vibration & shock involved in the
transportation & handling.
The construction of the meter should ensure consistence
performance under all conditions especially during heavy rains / very hot weathers. The
insulating materials used in the meter should be non-hygroscopic, non-ageing & have tested
quality. The meter should be sealed in such a way that the internal parts of the meter becomes
inaccessible and attempts to open the meter shall result in viable damage to the meter cover.
This is to be achieved by using continuous Ultrasonic welding on the Meter body or any other
technology which is either equally or more efficacious.
The meter should comply latest technology such as Microcircuit or Application Specific
Integrated Circuit (ASIC) to ensure reliable performance. The mounting of the components on
the PCB should compulsorily be Surface Mounted Technology (SMT) type. Power supply
component may be of PTH type. The electronic components used in the meter should be of
high quality and there should be no drift in the accuracy of the meter for at least ten years. The
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
circuitry of the meter should be compatible with 16 Bit (or better) ASIC with compatible
processor and meter should be based on Digital measuring and sampling technique.
The meter should be housed in a safe, high grade, unbreakable, fire resistant, UV stabilized,
virgin Polycarbonate casing of projection mounting type. The meter cover should be transparent,
for easy reading of displayed parameters, and observation of operation indicators. The meter
base may or may not be transparent, but it should not be black in colour. The meter casing
should not change shape colour, size, and dimensions when subjected to 200 hrs on UV test as
per ASTMD 53. It should withstand 650 deg. C. glow wire test and heat deflection test as per
ISO 75.
The meter cover should be sealed to the meter base with at least 2 nos. of seals by the
Manufacturer.
The bidder shall submit relevant documents regarding the procurement of
polycarbonate material. The polycarbonate material of only the following manufacturers
shall be used.
a) G.E. Plastics :
LEXAN 943A or equivalent for cover & Terminal cover/ LEXAN
503R or equivalent base.
b) BAYER :
Grade corresponding to above
c) DOW Chemicals :
-Do-
d) MITSUBISHI :
-Do-
e) TEJIN :
-Do-
f) DUPONT :
-Do-
5.2
METER CASE AND COVER
The meter should have a case, which can be sealed in such a way that the internal parts of
the meter are accessible only after breaking the seal and cover. This is to be achieved by
used of Ultrasonic Welding (Ultrasonically continuously welded at three sides so that the
cover cannot be separated from the basic without breaking/damaging the case & cover) or
any other technology which is either equally or more efficacious. In case, ultrasonic
welding using plate / strip is used the material of plate / strip should be same as that of
cover and base and the strip. The manufacturer‟s logo should be embossed on the strip /
plate. The material of the meter body (case and cover) shall be of Engineering Plastic.
The meter cover should be fixed to the meter base (case) with Unidirectional Screws, so
that the same cannot be opened by use of screwdrivers. These unidirectional screws
should be covered with transparent caps, ultrasonically welded with the meter body and
the screw covers should be embedded in the meter body in a groove.
The meter shall withstand external magnetic influence as per latest amendments of CBIP
Technical Report No.88.
5.3
TERMINAL BLOCK AND COVER :
The terminals may be grouped in a terminal block having adequate insulating properties
and mechanical strength. The terminal block should be made from best quality nonhygroscopic, flame retardant material (capable of passing the flammability tests) with nickel
plated brass inserts / alloy inserts for connecting terminals.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
The terminals in the terminal block shall be of adequate length in order to have proper grip
of conductor with the help of screw adjustable metal plates to increase the surface of
contact and reduce the contact resistance. The screws shall have thread size not less than
M 4 and head having 4-6mm. Diameters. The screws shall not have pointed ends at the
end of threads. All terminals and connecting screws and washers should be of tinned /
nickel plated brass material.
The internal diameter of terminal hole should be minimum 5.5 mm. The holes in the
insulating material shall be of sufficient size to accommodate the insulation of conductor
also.
The terminal cover shall be transparent re-inforced Polycarbonate, Engineering Plastic with
minimum thickness 2.0 mm and the terminal cover shall be of extended type completely
covering the terminal block and fixing holes. The space inside the terminal cover should be
sufficient to accommodate adequate length of external cables.
6.0
WORKING ENVIRONMENT
As per IS 14697-1999 (reaffirmed 2004). Meter to perform satisfactorily under Non-Air
Conditioned environment (within stipulations of IS) & IP51 housing for indoors use.
The meter shall be suitable designed for satisfactory operation under the hot and hazardous
tropical climate conditions and shall be dust and vermin proof. All the parts and surface, which
are subject to corrosion, shall either be made of such material or shall be provided with such
protective finish, which provided suitable protection to them from any injurious effect of
excessive humidity.
7.0
MANUFACTURING PROCESS, ASSEMBLY AND TESTING
Meters shall be manufactured using latest and „state of the art‟ technology and methods
prevalent in electronics industry. The meter shall be made from high accuracy and reliable
surface mount technology (SMT) components. All inward flow of major components and sub
assembly parts (CT, PT, RTCs / Crystal, LCDs, LEDs, power circuit electronic components
etc.) shall have batch and source identification. Multilayer „PCB‟ assembly with „PTH‟ (Plated
through Hole) using surface mounted component shall have adequate track clearance for
power circuits. SMT component shall be assembled using automatic „pick-and-place‟
machines, Reflow Soldering oven, for stabilized setting of the components on „PCB‟. For
soldered PCBs, cleaning and washing of cards, after wave soldering process is to be carried
out as a standard practice. Assembly line of the manufacturing system shall have provision for
testing of sub-assembled cards. Manual placing of components and soldering, to be minimized
to items, which cannot be handled by automatic machine. Handling of „PCB‟ with ICs / C-MOS
components, to be restricted to bare minimum and precautions to prevent „ESD‟ failure to be
provided. Complete assembled and soldered PCB should undergo functional testing using
computerized Automatic Test Equipment.
Fully assembled and finished meter shall under go „burn-in‟ test process for 24 Hours at 55
degree Celsius (Max. temperature to not exceed 60 degree Celsius) under base current (Ib)
load condition.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Test points should be provided to check the performance of each block/stage of the meter
circuitry.
RTC shall be synchronized with NPL time at the time of manufacture. Meters testing at
intermediate and final stage shall be carried out with testing instruments, duly calibrated with
reference standard, with traceability of source and date.
8.0 DISPLAYS
The meter shall have 7 digits (with ±indication), parameter identifier, backlit Liquid Crystal
Display (LCD) of minimum 10 mm height, wide viewing angle. Auto display cycling push button
required with persistence time of 12 Seconds. LCD shall be suitable for temperature withstand
of 70 deg C; Sequence of display of various instantaneous electrical parameters shall be as
desired by Purchaser at the time of order.
The data stored in the meters shall not be lost in the event of power failure. The meter shall
have Non Volatile Memory (NVM), which does not need any battery backup. The NVM shall
have a minimum retention period of 10 years.
9.0
PERFORMANCE UNDER INFLUENCE QUANTITIES
The meters performance under influence quantities shall be governed by IS 14697-1999
(reaffirmed 2004). The accuracy of meter shall not exceed the permissible limits of accuracy
as per standard IS: 14697 (latest version).
10.0 OUTPUT DEVICE
Energy Meter shall have test output, accessible from the front, and be capable of being
monitored with suitable testing equipment while in operation at site. The operation indicator
must be visible from the front and test output device shall be provided in the form of LED.
Resolution of the test output device shall be sufficient to enable the starting current test in
less than 10 minutes.
11.0 REAL TIME INTERNAL CLOCK (RTC)
RTC shall be pre-programmed for 30 Years Day / date without any necessity for correction.
The maximum drift shall not exceed +/- 300 Seconds per year.
The clock day / date setting and synchronization shall only be possible through password/Key
code command from one of the following:
a) Hand Held Unit (HHU) or Meter testing work bench and this shall need password
enabling for meter;
b) From remote server through suitable communication network or Sub-station data logger
„PC‟.
12.0 QUANTITIES TO BE MEASURED & DISPLAYED
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
The meter shall be capable of measuring and displaying the following electrical quantities
within specified accuracy limits for polyphase balanced or unbalanced loads:
a) Instantaneous Parameters such as phase and line voltages, currents, power factors,
overall kVA, kW, kVAr, power factor, frequency etc as per details given in the table below
and enclosed annexure.
b) Block Load Profile Parameters such as kVAh, kWh, kVArh (lag, lead), Maximum Demand
(MD) in kW & kVA, power factor, phase and line voltages, currents etc as per details
given in the table below and enclosed annexure (Category – A Meter).
c) Daily Load Profile Parameters such as cumulative energy kWh (import, export),
cumulative kVAh (while kW- import/export), cumulative energy kWArh (quadrant-1 / 2 / 3 /
4), reactive energy high (V > 103%)/low (V < 97%), etc as per details given in the table
below and enclosed annexure (Category – B Meter).
In addition to above the meter shall also record the Name plate details, programmable
parameters (readable as profile), occurrence and restoration of tamper events along with the
parameters (Table 5.1, 5.2 and 6.1 to 6.8 respectively of enclosed document)
Detail of category wise parameters requirement suitable for specific location such as
feeder/DT metering, interface points/boundary points is given in following tables of
guidelines document enclosed as annexure:
Annexure - I
Category
Parameter group
Substation Feeder/
Distribution Transformer
meter
Substation Feeder/
Distribution
Transformer/Boundary/Ring
fencing/Interface/HT
Consumer Meters
Instantaneous parameters
Block
Load
Profile
parameters
Name Plate details
Programmable
Parameters
Event Conditions
12.1
Annexure Table
No.
A2.1
A2.2
A5.1
A5.2
A6.1 to A6.8
Measurement of Harmonics
The meter should be capable of measuring fundamental energy as well total energy i.e.
fundamental plus Harmonics energy. Fundamental energy shall be made available on meterdisplay and the same only shall be used for billing purpose.
The total energy shall be logged in the meter memory and be capable of downloading to the
BCS through the HHU and be available for viewing at the BCS end.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
13.0
DEMAND INTEGRATION PERIOD
As per enclosed guidelines document.
14.0 MD RESET
It should be possible to reset MD by any of the following options:
Remote MD reset
Local MD Reset for manually triggered at site.
MD reset by HHU through Authenticated command.
15.0 MARKING OF METERS
The marking of meters shall be in accordance with IS: 14697 /1999 (reaffirmed 2004).
The meter shall also store name plate details as given in the table A5.1 of annexure. These
shall be readable as a profile as and when required.
16.0 COMMUNICATION CAPABILITY
The meter shall be provided with two ports for communication of the measured/collected data
as per document enclosed in the annexure, i.e. a hardware port compatible with RS 232 or RS
485 specifications which shall be used for remote access through suitable Modem
(GPRS/GSM/EDGE/CDMA/ PSTN/LPR) and an Optical port complying with hardware
specifications detailed in IEC-62056-21. This shall be used for local data downloading through
a DLMS compliant HHU.
The RS 485 port shall be used at Substations suitable for multi-drop connections of the meter
for exporting data to sub-station data logger/DCU/Computer and the remote end server. The
RS 232 port shall be used at boundary points meters and Distribution Transformer meters
capable to transfer and export data to the remote end server through suitable communication
mediums (GPRS/GSM/EDGE/CDMA/ PSTN/LPR). Both ports shall support the default and
minimum baud rate of 9600 bps.
17.0
HAND HELD UNIT (HHU)
To enable local reading of meters data a DLMS compliant HHU shall be used. The HHU shall
be as per specification given in the enclosed guidelines document. It shall be compatible to the
DLMS compliant energy meters that are to be procured/ supplied on the basis of this
specification.
18.0 TAMPER & FRAUD MONITORING FEATURES
The meter shall work satisfactorily under presence of various influencing conditions like
External Magnetic Field, Electromagnetic Field, Radio Frequency Interference, Vibrations,
harmonic Distortion, Voltage/Frequency Fluctuations, and electromagnetic High Frequency
Fields etc. The meter shall be immune to abnormal voltage/frequency generating devices and
shall record the occurrence and restoration of such tamper events along with parameters such
as current, voltages, kWh, power factor, event code, date & time etc. (listed in Table A 6.1 to A
6.8 in enclosed document).
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Tamper details shall be stored in internal memory for retrieval by authorized personnel through
either of the following:
i)
HHU.
ii) Remote access through suitable communication network.
Minimum 200 numbers of events (occurrences & restoration with date & time) should be
available in the meter memory.
19.0 TYPE TESTS
The meter offered should have successfully passed all type tests described in the IS 14697
and IEC 61000 4-5 and the meter Data Transfer and Communication capability as per
enclosed guidelines document. Type test certificate shall be submitted along with the offer and
the same shall not be more than 36 months old at the time of bid submission. Make & type of
major components used in the type-tested meter shall be indicated in the QAP. The condition
are to be relaxed by the purchasers (utilities) for the bids to be issued in next nine months (i.e.
upto May 2010) to accommodate design, development and testing of the new standard
meters, conforming to the guidelines document enclosed as annexure, by manufacturers. The
bidder shall have to submit the required type test certificate along with tested energy meters
(as per bid requirement)to the purchaser (utility) at the time of meters delivery.
Further Purchaser shall reserve the right to pick up energy meters at random from the lots
offered and get the meter tested at third party lab i.e. CPRI / agencies listed at Appendix-C of
CBIP 88 / NPL / CQAL/ ERTL / ERDA at the sole discretion of the Purchaser. The supplier has
no right to contest the test results of the third party lab or for additional test and has to
replace/take corrective action at the cost of the supplier.
It shall be the responsibility of the supplier to arrange such tests and Purchaser shall be
informed of the date and time of conduction of tests well in advance to enable him to witness
such tests. Test charges of the testing authority, for such successful repeat type tests, shall be
reimbursed at actual by the Purchaser.
20.0 ACCEPTANCE & ROUTINE TESTS
Criteria for selection for such tests and performance requirements shall be as per IS 146971999 (reaffirmed 2004)
Additional acceptance shall include Surge withstand (SWC), Lightning impulse and HF
disturbance as per IEC 62052-11. For these specific tests, one sample meter per order from
one of the offered lot shall be subjected to SWC / other semi-destructive tests. Meters after
tests shall not be used. Lightning Impulse test, listed under „SWC‟ shall be done for 6 kV p and
300 Joules.
Accuracy tests shall be performed at the beginning and at the end of the acceptance tests
specified.
20.1 INSPECTION :
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
The inspection shall be carried out at any stage of manufacture, by the WBSEDCL authorised
representatives, with 15 days prior intimation to the supplier. The manufacturer shall grant all
reasonable facilities free of charge for inspection and testing to satisfy the purchaser that the
materials to be supplied are in accordance with their specification.
The supplier shall keep the WBSEDCL informed in advance, about the manufacturing
programme so that the arrangement can be made for inspection.
The representative / Engineer of the WBSEDCL attending the above testing shall carry out testing as per
relevant standards and issue test certificate approval to the manufacturer and give clearance for
dispatch.
21.0 QUALITY ASSURANCE:
The manufacturer shall have a comprehensive quality assurance program at all stages of
manufacture for ensuring products giving reliable, trouble free performance. Details of the
bidder‟s quality assurance and test set up shall be furnished with the bid. A detailed quality
assurance program shall be finalized with the successful bidder during the award stage.
Bidder shall furnish following information along with his bid:
i)
ii)
iii)
iv)
v)
vi)
vii)
Organization structure of the manufacturer and his main sub-suppliers (PCBs, SMT
cards, CT/PT) with details of „QA‟ setup, overall workflow;
Copy of system manual showing „QAP‟ (Quality Assurance Plan) as actually practiced
during manufacturing and final testing.
List of raw materials and critical components (ASIC chip, crystal clock, memory register
Chip, transformers, optical ports etc.) with their suppliers;
Stage inspection of product before final testing;
Procedure adopted for „In-situ‟ testing of PCBs, after placement of surface mounted
component, for quantitative parametric variation of tolerance by self or sub-contractor.
Testing and calibration facility, date of calibration of test bench, manpower data of bench
operators;
Sample copies of test certificate of bought out components.
22.0 QUALIFYING REQUIREMENTS
i)
ii)
iii)
iv)
Bidder should be a manufacturer;
He should have all the facility in his works for design, assembly, quality assurance, burnin test (Fully assembled Energy Meter), testing (all routine and acceptance tests),
automatic calibration of Energy Meter on software based test bench, qualified team of
technical and software engineers. All Test Report must be computer generated.
The average annual turnover of the manufacturer for Energy meters for the three (3) best
financial years out of last five (5) years, should be at least Rs.** …………… Lakhs.
(** is 2 x Package Cost x 12/ Work completion schedule in Months)
Notwithstanding anything stated herein under, the Purchaser reserves the right to assess
the capacity and capability of the bidder to execute the work, should the circumstances
warrant such assessment in the overall interest of the Purchaser.
22.1` TESTING AND MANUFACTURING FACILITIES:
The Bidder shall have at least the following testing facilities to ensure accurate calibration:
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
Insulation resistance measurement
Running at no load
Starting current test
Limits of error
Range of adjustment
Power loss in voltage and current coil
Repeatability of error
Transportation test
Low load run test
Heating test
The Bidder shall give a detailed list of bought out items with name of the manufacturer and
details about quality control.
23.0 GUARANTEE
Equipment (Meter) supplied shall be guaranteed for a period of 66 months from the date of
supply. Bidders shall guarantee to repair or replace the meters and meter boxes (if supplied),
which are found to be defective/ inoperative at the time of installation, or become inoperative/
defective during guarantee period. Replacements shall be effected within 1 month from the
date of intimation.
Supplied meters are to be guaranteed for a period of 5 ½ (Five and half ) years from the
date of supply covering both supplied & replaced meters. However, the Bank Guarantee
shall remain valid for a period of 7 years from the date of supply accordingly.
24.0 FIXING & CONNECTION ARRANGEMENT
Manufacturer shall ensure following technical points:
i)
Meter shall be suitable for mounting on Simplex type vertical panel with front door; CATM4 disconnecting type TBs to be used for Current circuit; Panel wiring to be properly
dressed and harnessed; External cables to enter panel from bottom gland plate using
double compression glands.
ii)
Energy Meter terminals block shall be adequately sized with regard to maximum
conductor dimension, commensurate with current rating of Energy Meter.
25.0 SUPPLY OF POWER PACK & HHU
For every 50 nos of meters and part thereof one power pack and one HHU (8MB RAM size
with Li –ion battery) should be supplied free of cost.
26.0 SUBMISSION OF SAMPLE & DOCUMENTS
While submitting the Quotation to the Material Controller, Central Stores & Purchase
Department, Vidyut Bhavan, 4th Floor, B - Block Kolkata- 700 091, a sample meter having all
the mentioned features, BCS with allied software and sample of seal etc. along with the Type
Test Certificates and with the test results and ISI Certificate is to be submitted to C.E. (DTD),
Abhikshan within 16-00 hrs.(except Saturday) & within 12-00 hrs (Saturday) and copy of
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
letter indicating acceptance of Sample by the Office of the C.E. (DTD) is to be submitted to
the Material Controller prior to Opening of Offer. Offer will not be accepted without
submission of sample and the Tender will not be opened. Any other accessories required for
observing the performance & capabilities of the Meter are to be submitted along with offer.
Following sample shall be submitted to C.E. (DTD). A confirmation from C.E. (DTD)
regarding submission of sample as detailed below shall have to be submitted along with the
Techno-Commercial Bid (Cover-I).
a) 3-Phase 3-Wire 11KV, - /1A. Class of Accuracy 0.5S – 2 Nos.
HHU, Power-Pack & Modem, if required, to be brought at the time of testing of sample
meters submitted against the tender and to be taken back by the bidder after testing of the
said meters.
27.0 SCHEDULES:
The Bidder shall submit the following schedules (as per Standard Format), which is part and
parcel of the Specification.
Schedule A Guaranteed Technical Particulars
Schedule B List of Raw Materials (as per enclosed Standard Format)
Schedule C Pre-qualification Conditions
Schedule D List of Documents to be submitted during sample submission
*********************
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Schedule - A
GUARANTEED TECHNICAL PARTICULARS FOR
11KV STATIC TRIVECTOR METERS
Sl.No.
Description
1
2
3
4
5
6
7
8
9
Maker‟s name and country
Type of meter/model
Accuracy class
Parameters displayed
P.F. Range
Basic Current (Ib)
Maximum Current
Minimum starting current
Rated Voltage
10
Variation of voltage at which
meter functions normally
Rated Frequency
Power Loss in Voltage &
Current circuits
11
12
13
14
Dynamic range
MD reset Provisions
15
No. of digits of display and
height of character
16
17
18
19
20
21
Non volatile memory
Principle of operation
MD Integration period
Weight of meter
Dimensions
Warranty
22
Outline drawings & Leaflets
Required Specification
To be mentioned
To be mentioned
0.5S
To be mentioned
0 Lag-unity-0 Lead
-/l A
> 200 % of Ib
0.2% of Ib
Ph-Ph : 110V
Ph – n : 63.5V
-30% to + 20% of Vref
50Hz
Potential Circuit Less
than 1.5W/8VA,
Current Circuit Less than
1VA (Less VA/ Watt
getting the preference).
To be mentioned
a) Through
authenticated CMRI or
Remote Communication
Command b) Automatic
resetting at preset date
& time.
Seven segment,
minimum
7 digit
Liquid Crystal Display
(LCD) with backlit or
LED, having minimum
character height of 10
mm.
To be mentioned
To be mentioned
15 Minutes
To be mentioned
To be mentioned
As mentioned in
Sl.No.31 of the GTP
(next page).
To be furnished
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Manufacturer’s
particulars
23
a) Remote meter-readout
facility
b) Communication protocol
used.
c) Sealing provision for meter
& optical port.
d) Baud rate of data
transmission
e) Required software to be
resident in CMRI and BCS.
f) Ultrasonic welding of body
g)
Manufacturers
Seal
provided
Base Computer Software
To be mentioned
29
Anti Tamper Features
30
Data retention by NVM
without battery back up and
un-powered condition
To be mentioned in
details.
10 years
31
Guarantee period of meter
24
25
26
27
28
32
32.1
To be mentioned
To be mentioned
To be mentioned
To be mentioned
To be mentioned
To be mentioned
Windows XP based or
suitable
for
latest
version.
Type Test Certificates
To be furnished
Time
of
Day
Zones To be mentioned
(Selectable)
Whether meter measures Both required
both fundamental & Harmonic
Energy
Real Time Clock Accuracy
Max. drift per annum
+/- 5 min for Class 0.5S.
5-1/2 years from the
date of supply.
Guarantee period shall
be printed on the
nameplate.
After publishing New IS
To be mentioned
BIS license
BIS license No. & dt. with its
validity for ISI certification
mark on offered meter.
32.2
Details of meter design for
To be mentioned
which above BIS certification
has been obtained: (i)
Ratio of Ib to Imax
(ii)
Material of meter body
(iii)
Grade of printed circuit Board
material
(iv)`
Type of assembly of
component used (SMT)
(v)
Meter constant (IMP / KWh)
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
(vi)
(vii)
33
34
35
Auxiliary power circuit (with
PT or PT less)
Accuracy class
ISO accreditation no. & dt.
with its validity
Other parameters / features
Conform to specification
not covered in the above GTP of IS-14697 / 1999 &
CBIP technical report
No.88 (with its latest
amendment).
Past Experience
Copies of order
executed in last three
years along with GTP of
the supplied meters to
be enclosed. Past
experience to be
considered for
manufacturing meter as
per IS: 14697 & CBIP88/304
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Sl.
No.
1
Schedule - B
LIST OF RAW MATERIALS & CRITICAL COMPONENTS
Component
Make / origin
Function /
Feature
Current Element
2
Measurement /
Computing chips
3
Memory chips
4
Display modules
5
Communication
modules
6
Optical port
7
Power Supply
8
Electronic
components
9
Mechanical
parts
10
Battery
11
RTC / Micro
controller
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Schedule - C
Pre-Qualification Conditions for HT Static Meters
Sl. No.
1
2
3
4
5
6
Particulars
Bidders must have valid BIS
certification for the offered meter. If
it has started to issue by appropriate
authority
Bidder preferably posses ISO 9001
certification
Bidder should be manufacturers of
static meters having supplied Static
11/33 KV H.T. Meters with memory
and LCD display as per IS 14697 &
CBIP 88/304 to Electricity Boards /
Utilities in the past 3 years.
Bidders should have dust free, static
protected environment for
manufacture, assembly and Testing.
Bidder should have automatic
computerized test bench for lot
testing of meters.
Bidder has facilities of Oven for
ageing test.
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear
Remarks
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Yes / No
Schedule - D
LIST OF DOCUMENTS TO BE SUBMITTED DURING SAMPLE SUBMISSION
Sl.
No.
DOCUMENTS TO BE SUBMITTED
1
Attested copy of type test reports from NABL
accredited laboratory as per new IS(If
Published)
Attested copy of BIS certificates of the same
type of meter submitted as sample
2
3
Attested certificates as regards material
used for meter case, cover & terminal block.
4
Scheduled B as per Tender document I as
per tender documents
Scheduled C as per tender documents
5
6
Operating manual & Tamper logic of the
meter submitted
12 KV 16 KA Multipanel Shunt Trip Indoor Type Switchgear