SPECIAL INSTRUCTIONS TO BIDDER Please read following instructions carefully before submitting your bid. 1. All the drawings, i.e. elevation, side view, plan, cross sectional view etc.,
in AutoCAD format and manuals in PDF format, for offered item shall be submitted. Also the hard copies as per specification shall be submitted.
2. The bidder shall submit Quality Assurance Plan for manufacturing
process and Field Quality Plan with the technical bid. 3. The bidder shall have to submit all the required type test reports for the
offered item. In case of non-submission of the type test reports with the offer, the bid shall be liable to be rejected.
4. The bidder must fill up all the point of GTP for offered item/s. Instead of
indicating “refer drawing, or as per IS/IEC”, the exact value/s must be filled in.
5. All the points other than GTP, which are asked to confirm in technical
specifications must be submitted separately with the bid. 6. The bidder is required to impart training in view of manufacture,
assembly, erection, operation and maintenance for offered item, at his works, to the person/s identified by GETCO, in the event of an order, free of cost. The cost of logistics will be bear by GETCO.
7. Please note that the evaluation will be carried out on the strength of
content of bid only. No further correspondence will be made.
8. The bidder shall bring out all the technical deviation/s only at the specified annexure.
9. The bidder should indicate manufacturing capacity by submitting latest updated certificate of a Chartered Engineer (CE).
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QUALIFYING REQUIREMENT DATA (For Supply)
Bidder to satisfy all the following requirements. 1) The bidder shall be Original Equipment Manufacturer
(OEM). The offered equipment have to be designed, manufactured and tested as per relevant IS/IEC with latest amendments.
2) The minimum requirement of manufacturing capacity
of offered type, size and rating of equipment shall be 5 times tender / bid quantity. The bidder should indicate manufacturing capacity by submitting latest updated certificate of a Chartered Engineer (CE).
3) Equipment proposed shall be of similar or higher rating
and in service for a minimum period of THREE (3) years and satisfactory performance certificate in respect of this is to be available and submitted.
4) The bidder should clearly indicate the quantity and
Single Value Contract executed during last FIVE (5) years, for the offered equipment. Bidder should have executed one single contract during last five years for the quantity equivalent to tender / bid.
The details are to be submitted in following format,
Sr. No
ITEMS SUPPLIED
TO
ORDER REFERENCE No. & DATE
ITEMS QUANTITY ORDER FULLY
EXECUTED. YES/NO
STATUS, IF ORDER UNDER
EXECUTION
REMARK
5) Equipment offered shall have Type Test Certificates
from accredited laboratory (accredited based on ISO/IEC Guide 25 / 17025 or EN 45001 by the National accredition body of the country where laboratory is located), as per IEC / IS / technical specification, valid for a period of FIVE years from the date of validity of technical bid.
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TECHNICAL SPECIFICATION FOR 11 KV INDOOR PANEL / SWITCH BOARD WITH VCB
1.1 SCOPE
The 11 kV Switch boards shall fully meet with the technical, climatic, isoceraunic and system conditions given in this specification, for indoor installation.
1.2 CLIMATIC & ISOCERAUNIC CONDITIONS 1.2.1 The climatic conditions at site under which the equipment shall
operate satisfactorily are as follows: (a) Maximum ambient temperature 50 of the air in shade (0C) (b) Minimum ambient temperature 4 of the air in shade (0C) (c) Maximum daily average 40 ambient temperature (0C) (d) Minimum yearly average 30 ambient temperature (0C) (e) Maximum relative humidity (%) 95 (f) Average number of thunder-storm 15 days per annum (g) Average annual rainfall (cm) 115 (h) Maximum wind pressure (Kg/m2) 150 (i) Earthquake acceleration (g) 0.08 x 2 g. (j) Height above mean sea level (m) Not exceeding 1000
1.2.2 The equipment offered shall be suitable for continuous operation at
the full rated capacity under the above conditions. 1.2.3 Since the sub-stations are near the seashore or in an industrial
area, the equipment offered shall be suitable, for heavily polluted atmosphere.
1.3 TECHNICAL AND SYSTEM CONDITIONS 1.3.1 SYSTEM CONDITIONS
11 kV switchgear equipment and accessories shall comply with the following system conditions:
(a) Nominal system voltage (kV) 11 (b) Highest system voltage (kV) 12 (c) System earthing Effectively earthed (d) Number of phases 3 (e) Rated Frequency (Hz) 50 (f) Basic Insulation level
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(i) 1.2 x 50 micro second impulse 75 withstand voltage (in KV peak) (ii) One minute power frequency 28 withstand voltage (KV rms) 1.3.2 TECHNICAL REQUIREMENT 1.3.2.1 CIRCUIT BREAKERS
The circuit breakers shall comply with the following technical requirements: (a) Type Indoor drawout (b) Insulating Medium Vacuum (c) Breaking capacity 500 MVA (d) Rated normal current of breakers (Amp) 1250/1600 (e) Bus-bar Rating (Amp) 1600 (f) (i) Rated short time current (KA RMS) 25 (ii) Rated time (Sec.) 3 (g) Operating duty cycle 0 - 0.3 Sec - Co - 3 Min.-Co. (h) Method of closing
(i) Normal Motor operated (ii) Emergency Manual
(i) Auxiliary voltage for closing 110 V DC and tripping coils (j) Auxiliary voltage for spring 240 V, AC, 50 Hz charging motor with voltage variation
+10% and –15% of normal value and frequency variation
± 3% (k) Size of bus bar 1500mm2(preferably
2x75x10mm)
1.3.2.1.1 GERNERAL REQUIRMENTS OF C.B. The circuit breakers shall comply with the requirements of the latest
edition of IS: 13118/1991 or IEC-62271-100 except where specified, otherwise in the specification. The circuit breakers shall be with vacuum insulating medium and shall be indoor, floor mounting, draw out type. They should be complete with raising and lowering mechanism, transportation truck, isolating plugs and spouts with automatic metallic gravity fall type safety shutters, padlocking arrangements and necessary mechanical interlocks. They shall be incorporated in panel boards described in clause 1.3.2.5 of this specification.
1.3.2.1.2 The circuit breaker shall be capable of rapid and smooth
interruption of currents under all conditions, completely suppressing all undesirable phenomena even under the most severe and persistent short circuit conditions or during capacitor switching operations. There shall be no re-striking, no abnormal voltage and
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no high frequency current, generating consequent to switching of the capacitor banks. The details of any devices incorporated to limit or control the rate of rise of re-striking voltage across the circuit breaker contacts shall be stated. The over voltage caused by circuit breaker while switching inductive or capacitive loads shall not exceed 2.5 times the highest phase to neutral voltage. The actual make and break times of the circuit breakers throughout the ranges of their operating duties shall be stated in the tender and guaranteed.
1.3.2.1.3 The circuit breaker shall be “trip free” only. 1.3.2.1.4 The symmetrical breaking capacity of the breaker shall be 500
MVA, which shall remain constant within the limits of the two rated voltages specified in this specification. For voltages lower than the rated voltage, the breaking current shall remain constant.
1.3.2.1.5 The relation between current and time shall be maintained in
accordance with the formula I2t = constant, when short circuit duration exceed one second.
1.3.2.1.6 The temperature rise and maximum temperature on any part of the
circuit breaker, while in service under continuous full load conditions shall not exceed the permissible limits of temperature rise as specified in the IEC-694:1996 publication for alternating current circuit breakers with bolted type silver plated bus bars, jumpers & riser ends. Gaskets shall be of a material which will not deteriorate under service conditions. Metallic compression steps shall be provided for compressible gasket.
1.3.2.1.7 Main contacts shall have ample area and contacts pressure for
carrying the rated current and the short time rated tripping current of the breakers without excessive temperature rise which may cause pitting or welding. Contacts shall be adjustable to allow for wear and shall be easily replaceable and shall have a minimum of moveable parts.
The main contacts shall be the first to open and in the last to close
so that there will be little burning and wear of the contacts. Acing contacts if provided shall be the first to close and last to open and shall be easily accessible for inspection and replacement. Tips of arcing and main contacts shall be suitably silver plated or have a tungsten alloy tipping. The moving contact shall have a permanent marking or scale other means shall be provided so that the extent of wear and tear of the tip can be measured.
1.3.2.1.8 The circuit breaker shall be suitable for rapid closing and tripping.
The breaker opening and closing operations shall be obtained from compressed spring charging mechanism. The mechanism for spring charging shall be motor operated with facility for manual, charging when required. It shall be suitable for re-closing once. Spring
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operated mechanism shall be complete with opening spring, closing spring and all necessary accessories to make the mechanism a complete unit. Each mechanism shall be designed to have a continuous sequence of circuit breaker opening and closing operations, to be obtained by control switch. Operating mechanism shall be operated by local electrical control. A conveniently located manual tripping lever push button shall also be provided for tripping the breaker and simultaneously opening the circuit. The manual closing device to be provided should be at a convenient height so that it can easily be operated.
1.3.2.1.9 The auxiliary voltage of spring charging motor shall be stated under clause 1.3.2.1 (j).
1.3.2.1.10 The closing release shall operate correctly at all values of voltage
between 85% and 110% of the rated voltage. The shunt trip shall operate correctly under all conditions of the circuit breaker upto the rated breaking capacity of the circuit breaker and at all values of supply voltage between 70% and 110% of the rated voltage.
1.3.2.1.11 Mechanical indicators to show the ‘close’ or ‘open’ position of the
contacts shall be provided. Operating handle shall be provided for charging the operating mechanism.
1.3.2.1.12 All MS parts of breakers and ferrous parts such as hangers,
supports, bolts & nuts shall be hot dip galvanized as per IS:2629 (latest edition) with zinc platting & olive green passivation. The material for spring shall be rust proof.
1.3.2.1.13 The circuit breaker along with the operating mechanism shall be
mounted on a telescopic rail, to facilitate withdrawal, whenever required.
1.3.2.1.14 Working parts of the operating mechanism shall be of corrosion
resisting material, bearing which requires grease shall be equipped with pressure type grease fittings. Bearings pins, bolts, nuts and other parts shall be adequately pinned or locked to prevent loosening or changing adjustment with repeated operation of breaker. Breaker wheels shall be provided with ball bearings. Manufacturer shall indicate or mark the critical settings and gaps to be maintained undisturbed for satisfactory operation of breaker by RED marks and shall mention it on name / rating plate.
1.3.2.1.15 CIRCUIT BREAKER The circuit breakers shall be vacuum circuit breaker. 1.3.2.1.15(a) The circuit breaker shall comprise of three independent poles, fitted
with a common operating mechanism.
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1.3.2.1.15(b) The breaker along with its operating mechanism shall be mounted inside a weather proof sheet steel cabinet described under clause no. 1.3.2.5.1.
1.3.2.1.15(c) Each pole of circuit breaker shall constitute a separate breaking
chamber. These three breaking chambers shall be mounted on a common chassis and connected together for operation by common operating mechanism.
1.3.2.1.15(d) The following interlocks between the withdrawable/drawout circuit
breaker and cubicle shall be provided. i) The circuit breaker can not be inserted into ‘service’ position,
when it is in ‘closed’ position. ii) The circuit breaker can not be withdrawal from the ‘service’
position, unless it is in ‘open’ position. iii) The circuit breaker can be closed only in ‘test’ and in
‘service’ position. iv) VCB of lower rating cannot be inserted into the panel with
VCB of higher rating. v) VCB cannot be put in service unless the multiple plug is in
position. vi) Multiple plug cannot be removed, when VCB is in ‘service’
position. vii) The door can only be opened when breaker is in ‘OFF’
condition & vice versa. viii) The operation shall be possible only with closed-door
condition. ix) Racking – in/out operation should be possible only when
front panel door is closed. x) In case of feeder panel, when rear panel cover of cable
compartment is opened the breaker shall open instantly. Similarly, for incomer panel along with its own breaker the HV side breaker shall also get trip command instantly.
1.3.2.1.15(e) The details and ratings of vacuum interrupters shall be indicated in
GTP and on the Name plate of the VCB panel. The speed of operation of shall be indicated in the bid and in rating plate of VCB itself. The rating of vacuum interrupter shall be 12 kV having short time current rating of 25 kA for 3 sec and BIL of 28 kV rms & 75 kVp. The current rating for Outgoing VCB shall be 1250 Amp and for Incomer 1250 or 1600 Amp as per specified in the tender inquiry. The bidder shall submit the following test report for offered type rating vacuum interrupter OR shall offer these tests during acceptance. i) LIGHTING IMPULSE VOLTAGE WITHSTAND TEST ii) SHORT TIME CURRENT WITHSTAND TEST iii) TEMPERATURE RISE TEST The vacuum interrupter shall be encapsulated for protection against explosion.
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1.3.2.1.15(f) Live part indicators shall be provided on panel to conform that there
is no malfunction. Each pole “CLOSE POSITION” indication shall be provided on the front panel door.
1.3.2.1.16 EARTHING Earthing switch shall be provided (as optional - extra on per breaker
basis and alternatively “common earthing trolley (as optional extra)) shall be offered.
1.3.2.1.17 NAME PLATE
The name plate / rating plate shall be provided and shall also indicate all required details of breaker, panel, CT, PT, support insulator, vacuum interrupters, and any other required details.
1.3.2.2 CURRENT TRANSFORMERS 1.3.2.2.1 The cast resin insulated current transformers shall comply with the
requirements of IS:2705 (latest edition) and technical requirements furnished below. (1) CT Ratio (a) 900-600/5-5-0.577 Amp For transformer control (with 1250 Amp VCB) (b) 1200-600/5-5-0.577 Amp For transformer control (with 1600 Amp VCB) (c) 300-150/5-5 Amp For feeder control
1.3.2.2.2 Matching differential current transformers on 11 KV side shall be provided for differential protection. Necessary details of HV side current transformers will be furnished to successful bidders.
1.3.2.2.3 The current transformers shall be mounted on incoming/outgoing
feeder side only. 1.3.2.3 POTENTIAL TRANSFORMERS
1.3.2.3.1 The potential transformers shall comply with the following requirements, (a) Rated Burden : 100 VA
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(b) Type and Connections : One unit - 3 phase, 11 KV/110 Volt, Class (0.5) accuracy PTs or alternatively three nos. - 1 phase 11
3110
3
KV
V PTs connected in star-star
with neutral grounded 1.3.2.3.2 The drawout cast resin insulated potential transformers shall be
provided in/over the 11 KV panels, with necessary plug and socket type connections to enable easy withdrawal of PTs. The secondary lead shall be brought out to a terminal board. Fuses shall be provided at both HV and LV sides and limiting resistors were required, shall be provided. The PTs shall be easily withdrawable independently of the breaker.
1.3.2.4 ENERGY METERS (KWH METERS) 1.3.2.4.1 The static energy meter of high precision of accuracy 0.5, capable
of performing functions of recording and storing in the memory half hourly units sent out to HV/EHV consumers. The meter shall be 3-phase 4-wire balance load type for HT applications as per attached technical specifications.
The Energy Meter should have appropriate hardware and software
to communicate with existing SCADA system & should be capable to provide data on polling cycle.
1.3.2.5 PANEL BOARDS 1.3.2.5.1 The 11 KV panel with accessories and fittings shall be indoor, floor
mounting, extensible sheet steel cubicle type switch boards for controlling 11 KV side of transformers, 11 KV feeders, for various sub stations. The breaker, CTs and PTs described under clauses 1.3.2.1, 1.3.2.2 and 1.3.2.3, above and the panel board shall be so constructed as to form independent 11KV indoor switch board panel. All the panels shall be completely dust and vermin proof. The panels shall remain vermin proof, even when the breaker is taken out for maintenance. The transformer control panel and feeder control panels as well as there withdrawable breaker portions of same voltages shall be interchangeable. Overall dimensions of the panel shall be furnished to check up the suitability with the existing panels. The exterior as well as interior of panel shall be painted with two coats of stoved enamel paint, with zinc phosphate treatment, after application of single coat of anti-rusting paint. The exterior shall be painted with light gray paint shade 631 of IS: 5. The interior shall be painted with glossy white paint shade. The manufacturer shall have in-house painting facility. The panels shall be provided with MS sheet on all sides and shall be sent as individual panels but shall be suitable for assembly at site to form a switchboard. The
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panel shall be provided with not less than 2 mm thick MS sheet for all sides. Suitable blanking plates shall be provided to facilitate extensions of bus bars. Suitable barriers for the bus-bars breakers shall be provided, so that damage to other healthy panels is minimized in case of damage in one of the panels. Lifting arrangement shall be provided for the panel. Breaker, Busbar, cable/CT chamber shall be individual. Pressure release flaps shall be provided for breaker chamber, bus bar chamber, CT & Cable chamber. The flaps should be gravity fall type with suitable size wire mesh provided bellow it, to maintain vermin proofing. The rear door shall have wire mesh provided behind it, so that the person opening the door shall not have access to live parts of the panel. The nuts shall be welded with rear door cover so that all the bolts of the rear door cover shall be in position, there by effecting complete closing of the door.
The panels shall be vermin proof for degree of protection of IP5X.
The manufacturer shall submit type test report for offered panel along with material, size, thickness of metal sheet and gaskets provided. All the front doors shall be latch type only.
1.3.2.5.1(a) Dimensions of panel shall be provided as mentioned below:
Depth : 1750 mm to 2300 mm Height : 2200 mm to 2450 mm Width : 600 mm to 800 mm 1.3.2.5.2 BUS– BARS A set of 3-phase bus-bars of 1600 A current rating, having size of
preferably 2 x 75 x 10mm = 1500 mm2, suitably insulated by heat shrinkable tubes shall be provided. The bus bars shall be made of electrolytic high-grade copper and shall be rectangular bars of sufficient current rating. PVC sleeves/tap of suitable thickness shall be provided on bus bars and jumpers except at the joints. The joints shall be covered with suitable shrouds. Suitable shutters shall be provided in addition and separate from interlocks, with padlocking arrangements, so that bus bars become inaccessible, when the breaker is drawn out for maintenance. Phase and inter panel barriers shall be of FRP/UL994 material.
1.3.2.5.3 POWER TRANSFORMER CONTROL SWITCHBOARD PANEL The circuit breakers (vacuum) switchboard panels shall be
complete with the following equipments:
1. Vacuum circuit breaker of 11 KV, 500 MVA, 1250 Amp/1600 Amp current rating and having S.T.C. rating and B.I.L. as per clause 1.3.2.1(f) and 1.3.1(f) respectively of the specifications.
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2. 1-true trip free manually charged, manually released spring closing mechanism fitted with 110 V DC shunt trip coil and a hand trip device.
3. 1-set of vertically horizontally isolated secondary plugs and sockets with automatic safety shutters with locking arrangement.
4. 3 nos., epoxy cast resin type cable termination kits, suitable for 3 core 300 mm2/240 mm2 XLPE aluminum power cable, with complete accessories i.e. lugs, glands etc. The cable entry shall be from the bottom (300 mm2 cable for 1600 Amp VCB and 240 mm2 cable for 1250 Amp VCB).
5. 3- cast resin insulated current transformer having ratio 1200-600/5-5-0.577 Amp or 900-600/5-5-0.577 Amp for instrumentation, protection and differential as per detailed technical particulars, furnished under clause no 1.3.2.2 of this specification.
6. 1-voltage transformer, cast resin insulated, withdrawable carriage type independent of breaker 3-phase and having ratio 11000/110 volts, class I accuracy to IS:3156, complete with current limiting resistors and HT and LT fuses. Alternatively 3
nos. 1-phase
11
3110
3
KV
V PTs connected in star-star may be offered.
7. 2-80 watts/230 volt AC tubular heater, with thermostat set at required setting (One each in breaker and cable chamber)
8. 1-instrument panel mounted on the front comprising: (a) 1-Ammeter, 144 mm2 flush pattern case, with selector
switch and scaled suitably. (b) 1-Voltmeter, 144 mm2 flush pattern case, with selector
switch and scaled suitably. (c) 1-KW meter, suitable for 3-phase unbalanced load. (d) 1-KWH meter, suitable for 3-phase unbalanced load as per
detailed at clause 1.3.2.4. (e) 1-Double element auxiliary relay for buchholz alarm and
trip housed in non-drawout flush pattern case. (f) 1-Power factor meter suitable for 3-phase unbalance load. (g) 1-Triple pole IDMT over current and earth fault Numerical
relay as per annexure B attached. (h) 1-alarm cancellation relay (i) 1-set of potential selection relays of EE make or equivalent
shall be provided for automatic selection of voltage supplied to a voltmeter, KW and KWH meters in a definite sequence (provision shall also be made for two future transformer connection sets at each sub-stations).
(j) (1) 1-CB TNC control switch. (2) One each local manual close and trip push buttons. (k) 2-Indicating lamp working on 110 V DC supply to indicate
circuit breaker ON/OFF position. (l) 1-Trip circuit healthy umber lamp with push button and
working on 110 V DC supply. (m) 1-Mechanical ON/OFF indicator. (n) 1 Set of suitable mechanical interlocks.
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(o) 1-Test terminal block having 1100 grade insulation, duly wired for testing of relays and meters.
(p) Complete internal wiring with 1100 volt grade single core multi-stranded wires conforming to modern standard practice. All necessary cable glands and minor accessories shall be supplied.
(q) Internal earthing of all parts of the panel as per standard practice and providing for earthing of panel.
(r) 1-Circuit breaker operating handle, if applicable (two for each panel board set or 1 no. for each single phase transformer or O/G feeder panel).
(s) 1-Truck or trolley for easy drawl of the breaker from its panel, if applicable (two for each panel board set).
(t) Alarm scheme consisting of 1-Trip bell (on DC supply) 1-Hooter for DC failure (on AC supply) 1-Bell for AC failure (on DC supply) (u) 1-Panel label set.
1.3.2.5.4 FEEDER CONTROL SWITCHBOARD PANELS These panels will be similar to the transformer control switchboard
panels, but with the following changes: (1) Item Nos. 6, 8(b), 8(e), 8(f), 8(h), 8(i), 8(t) shall not be
provided. (2) 3 Cast resin insulated current transformer having ratio 300-
150/5-5 A for instrumentation as per detailed technical particulars furnished in clause 1.3.2.2 of this specification.
(3) The set of indicating lamps shall work on 240 V AC supply instead of 110 V DC supply, as in item 8(k).
(4) 2 Nos. epoxy resin type, cable termination kits suitable for three core 150 mm2/185 mm2 XLPE aluminum power cable, with complete accessories i.e. lugs etc. The cable entry shall be from bottom.
1.3.2.5.5 BUS SECTIONALIZING PANEL Outwardly this panel will be similar to the feeder switchboard. No
metering arrangement is to be provided on this panel. Single core CTs required for protection only shall be provided. The panel shall have 11 KV bus connections with adjoining panels on both sides, instead of cable box at bottom.
1.3.2.5.6 TESTS & TEST REPORTS
(i) The indoor switchgear panels with VCB shall be of proven design and should have been type tested as per IEC-62271-100 / IS:13118 for the following type tests, carried out in Government approved laboratory, within last five years prior to date of bid opening. a) Dielectric test
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b) Temperature Rise test c) Measurement of resistance of main circuit. d) Short time current and peak withstand current test e) Mechanical endurance test f) Duty cycle test g) Internal Arc test at 25kA for 0.1 sec in breaker, busbar and
CT/Cable compartment. h) Cable charging current switching test i) Capacitor bank current switching test j) Single phase making and breaking test k) BIL test on support insulators l) Degree of protection (IP5X) m) Humidity test n) Type tests reports for numerical relays and major bought
out items as per relevant IS/IEC. Type test reports for above tests shall be submitted with the offer. In
case of non-submission of the type test reports with the offer, the bid shall be liable to be rejected.
(ii) Routine tests/acceptance tests as per the latest edition of IS:
13118 for circuit breakers and also as indicated below shall be carried out on each VCB panels (in presence of purchaser’s representative if desired by the purchaser.)
a) Paper test to be carried out for panel with gaskets provided for vermin proofing.
(iii) The test reports for type tests and routine tests in respect of associated equipment such as compressor air receivers, motors, instrument, pressure switches, relays etc. as per the latest edition of the relevant IS shall be supplied by the bidder.
(iv) All tests reports for acceptance / routine rests shall be
submitted and got approved from the purchaser before dispatching the breaker.
1.4 EARTH QUAKE AND WIND DESIGN LOADS 1.4.1 Equipment shall be designed to withstand repeated earth quake
accelerations of 0.08 x 2g. and wind loads of 150 kg/m2 on the project area (non simultaneous) without damage to component parts and without impairment of operation.
1.5 AUXILIARY POWER SUPPLY 1.5.1 Power supply for auxiliary will be available at 240 V, single phase
and 415 V, three phase, AC 50 Hz. The frequency can vary between 97% and 103% and voltage would vary from 110% to 85% of the normal value.
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1.5.2 DC supply at 110 Volt, two wires will be available from the station battery for trip coils and closing coils of panels. DC supply will be available for indicating lamp in case of power transformer control panel only. DC supply is subject to variation between 85% and 110 % of the normal value.
1.6 Details shall be furnished in the appended schedule-A (guaranteed
particulars). In the absence of these details, offer shall be treated as incomplete and is liable to be ignored.
1.7 Detailed schedule of requirements is appended herewith. 1.8 All the required operation & maintenance manuals incorporating
Field Quality Plans (2 sets) shall be supplied along with each panel board.
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SCHEDLE – A
SCHEDULE OF GUARANTEED TECHNICAL PERTICULARS (To be filled in and signed by the Bidder)
[I] CIRCUIT BREAKERS
(1) Maker’s name and country of manufacturer
(2) Manufacturer’s type designation (3) Applicable technical standards (4) Rated voltage (KV) (5) Service voltage (KV) (6) Type of circuit breakers (7) Ambient temperatures used for
design (a) Maximum (0C) (b) Maximum daily average (0C) (8) Continuous current (a) Under site condition (Amp) (b) Rated (Amp) (9) (a) Rated short time current (KA rms) (b) Rated time (Secs) (10) Maximum rise of temperature over
ambient for current rating under clause 9 above (0C)
(11) Rated operating duty cycle (12) Interrupting capacity based on duty
cycle in clause 11 above (a) Symmetrical at rated voltage
in KA and MVA (b) Assymmetrical at rated
voltage (KA) (c) Symmetrical at service
voltage (KA) (13) Rated restriking voltage
(a) Amplitude factor (b) Rate of rise of natural
frequency (c) Type devices, if any used to
limit the rate of rise of restriking voltage
(14) Rated continuous voltage for rated MVA (KV)
(15) Making capacity (KA peak) (a) At higher rated voltage (b) At lower rated voltage
(16) Type of devices, if any used to obtain uniform voltage distribution between breaks
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(17) Recovery voltage distribution between breaks in percentage of rated voltage (a) Switching OFF capacitor
banks (b) Switching OFF on an
unloaded transformer (18) Details of main contacts
(a) Material (b) Whether contacts are silver
plated (c) Thickness of silver coating (d) Contact pressure (kg/mm2)
(19) Insulation level of the breaker (a) One minute dry withstand
voltage (KV rms) (b) One minute wet withstand
voltage (KV rms) (c) Impulse withstand test voltage
(KV peak) (20) Minimum clearance in air/vacuum
(a) Between phase (live parts) (mm)
(b) Between live part and earth (mm)
(c) Centre distance between phases (mm)
(20A) Details for circuit breaker V.I. (a) (i) quantity of vacuum per
circuit breaker, if applicable (bars)
(ii) Standard to which the Vacuum confirms
(iii) details of vacuum interrupters, indicate (Make/Type/Rating)
(iv) Speed of operation of V.I. (b) Weight of complete circuit
breaker with insulating medium (kg)
(c) Pressure of insulation media in the chamber, if applicable
(21) Whether circuit breaker is ‘Fixed Trip’ or ‘Trip Free’
(22) Method of closing (a) Normal (b) Emergency
(23) Type of closing mechanism (a) (i) Normal voltage of motor
for closing mechanism (AC Volt)
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(ii) Pick up range (AC Volt) (b) Power at normal voltage of
closing coil (Watt) (c) Power at 85% of normal 110
V DC (Watt) (d) Details of electric motor for
operating mechanism (complete name plate details)
(24) Type of tripping mechanism (a) Normal voltage of tripping
coils (Volt) (b) Power at normal voltage for
tripping coils (Watt) (c) Power at 70% of normal 110
V DC for tripping coils (25) Arc duration at 100% interrupting
capacity (a) Opening
(i) Arcing time (cycle) (ii) Total time measured from
instant of trip coil energisation to arc extinction (cycle)
(b) Closing time measured from instant of application of power to closing device upto arcing contacts touching (cycle)
(26) (a) Recovery voltage when circuit breaker is tested at 100% rated breaking capacity (HV inst.) (b) Rate of rise of restriking
voltage at breaking (i) For 30% breaking capacity
(KV/micro secs.) (ii) For 60% breaking capacity
(KV/micro secs.) (iii) For 100% breaking
capacity (KV/micro secs.) (c) Maximum over voltage factor
of the circuit breaker, when switching OFF (i) Capacitor banks (ii) Unloaded transformers
(iii) Loaded transformers (27) When switching OFF a
synchronous system (a) Maximum current (b) Minimum recovery voltage
between contacts of one pole (KV)
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(28) Nos. of operations, the circuit breaker is capable of performing without replacing/reconditioning oil (a) At 50% rated current (b) At 100% rated current (c) At 50% breaking capacity (d) At 100% breaking capacity
(29) Overall dimensions of panels
(a) Breadth (mm) (b) Width (mm) (c) Length (mm)
(30) Gaskets a) Material
b) Size c) Type
[II] CURRENT TRANSFORMERS
(1) Rated primary current (Amp) (2) Rated secondary current (Amp) (3) Rated output (VA) and accuracy
class (4) Rated continuous thermal current (5) Insulation level (lightening impulse
withstand voltage & with PF withstand voltage)
(6) Magnetising curve characteristics (7) Overall dimensions and mounting
details (8) Applicable standard and type of CT
[III] POTENTIAL TRANSFORMERS
(1) Rated primary current (Amp) (2) Over voltage factor and capacity
offered (3) Rated output (VA) and accuracy
class (4) Over voltage factor and capacity as
per ISS (5) Total weight (kg) (6) Insulation level (lightening impulse
withstand voltage & with PF withstand voltage)
(7) Overall dimensions and mounting details
(8) Applicable standard and type of PT
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[IV] INSTRUMENTS AND METERS PF Am- Volt Watt- KWH Meter meter meter meter Meter 1 2 3 4 5
(1) Make (2) Type (3) Accuracy class (4) Burden (VA) (5) Scale details (6) Short time
contacts (5) No. of positions (6) No. of contacts in
each positions (i) Open (ii) Close
(7) No. of spare contacts [VI] RELAY Main relay Auxiliary relay 1 2
(1) Make (2) Type (3) Current coil rating (4) Tap range (5) VA burden
(i) Highest tap (ii) Lowest tap
(7) Type of characteristic
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(8) Time of operation of maximum dial setting at (i) 5 times tap
setting current (ii) 10 times tap
setting current [VII] INDICATING LAMP Suitable for Suitable for 240 V AC 110 V DC 1 2
(1) Make (2) Type (3) Operating voltage (4) Lamp wattages (5) Colour of shade
[VIII] SWITCHBOARD WIRING
(1) Insulation of wire (2) Size of wire (mm2) (3) Grade of wire (Volt) (4) Whether conductor is of
(i) Copper (ii) Stranded
(5) Whether wire ends provided with rose-coutnany/lug type arrangements
(6) Make and voltage grade of terminal blocks used
[IX] CONFIRMATION POINTS (To be confirmed against each points)
(1) Discharge flap with wire mesh provided. (2) Speed of operation of VI shall be indicated on rating/ nameplate of
VCB. (3) The following test report for offered type rating vacuum interrupter
shall be submitted OR shall be offered during acceptance, on any one unit.
a. Lighting Impulse Voltage Withstand Test b. Short Time Current Withstand Test c. Temperature Rise Test (4) The vacuum interrupter shall be encapsulated for protection
against explosion. (5) Live part indicators (2 nos for I/C and 1 for feeder) shall be provided
on panel along with each pole “CLOSE POSITION” indication on the front panel door. Details & drawing is submitted.
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(6) All the critical settings and gaps to be maintained undisturbed for satisfactory operation of breaker shall be given by RED marks and mentioned on name / rating plate as well as manuals.
(7) The operation shall be possible only with closed-door condition. (8) Racking – in/out operation should be possible only when front panel
door is closed. (9) Tripping of VCB when rear door is open. (10) All the required O & M manuals incorporating FQP (2 sets) shall be
supplied along with each panel board. (11) Vermin proofing as per IP5X and details of material, size, thickness
of metal sheet and gaskets provided. (12) All the front doors shall be latch type only. (13) Type test report for Humidity test. (14) As a routine test, Paper test will be carried out on offered panel. (15) Heater with thermostat one each in cable & breaker compartment. (16) The joints shall be covered with suitable shrouds, instead of
paraplast.
_________________ ____________________ Seal of Firm Signature of Bidder Note: Instead of giving reference of drawing nos./IS/literatures etc. actual
values/figures must be furnished, where ever required, otherwise the said details in G.T.P. of the Technical Bid, will be evaluated accordingly.
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BILL OF MATERIALS
APPENDIX – IV
Quantity Per Each Panel/Panel Board
Sr. No.
Details of Material Make Type/ Desig- -nation
Catiogue if Any Single
Transf. Single Feeder
Bus Coulp
er
6 Panel Board
7 Pane
l Boar
d
8 Panel Board
1 2 3 4 5 6 7 8 9 10 11
1 Ammeter 144 mm2 flush pattern case, with selector switch
2 Voltmeter 144 mm2 flush pattern case, with selector switch
3 KWH meter
4 KW meter
5 Power-factor meter
6 Triple pole IDMT Over-current and Earth-fault Numerical relay
7 Double element auxiliary relay for Buchholz ‘alarm’ and ‘trip’
8 Alarm cancellation relay
9 Set of Potential selection relays
10 Circuit breaker ‘trip’-‘Neutral’-‘Close’ control switch
11 Local manual push button
12 Local manual trip push button
13 Mechanical ON/OFF indicator
14 Test terminal block
15 Epoxy cast resin type cable termination kits, with complete accessories, suitable for 3 core XLPE aluminum power cable, (i) Size 300 mm2 (ii) Size 240 mm2 (iii) Size 150 mm2 (iv) Size 185 mm2
16 Circuit breaker operating handle
17 Circuit breaker ON/OFF position indicating lamps working on 240V AC supply
18 Circuit breaker ON/OFF position indicating lamps working on 110V DC supply
19 ‘Spring charged’ indicator lamp
20 ‘Auto trip’ indicator lamp with suitable relay
21 Trip circuit healthy lamp
22 Trip circuit healthy push button
23 Alarm schemes
24 Trip bell (on DC supply)
25 Hooter for DC failure (on AC supply)
26 Bell for AC failure (on DC supply)
27 80 watts, 240 V AC tubular heater with thermostat (One each in breaker & Cable chamber)
28 Cast resin insulated current transformers as per specification
29 Cast resin insulated withdrawable carriage type, voltage transformer, as per specification
Signature of Bidder(With seal of Firm)
Note: The Bidder should state various makes for bought out items, wherever required in BOM instead of indicating ‘or’ or ‘equivalent’. Any other materials required other than above, for successful operation shall be indicated in a separate sheet.
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PRINCIPAL TECHNICAL PARAMETERS OF O/C AND E/F RELAY
SR. NO.
Item Specification
1 NON- DIRECTIONAL O/C AND E/F PROTECTION RELAY.
(A) Features:
a) Shall be Numerical type. b) Shall have 2 over current and 1 Earth Fault element. c) TRUE RMS Measurement. d) Have selectable and front panel programmable normal,
inverse, very inverse & IDMT Characteristic. e) Selectable CT Secondary. I.e. 1A / 5A f) High set over current with selectable time delay. g) High set Earth fault with selectable time delay h) Shall have Breaker Failure Protection as in built feature. i) Include hand reset Flag/LED indicators for phase
identification for all faults. j) Readable Human Machine Interface with LED/ LCD
display. k) Should be able to store at least last 3 events with fault
data viz. Fault current, Faulty Phase etc. l) Shall have Self monitoring feature. m) Relay offered shall be communicable type.
(B) Technical Parameters: 1. Rating: 1A / 5A, 50 Hz ±2.5 Hz 2. Auxiliary Supply: 110 V DC ±15 % (C) Relay settings: 1. Over Current: 50% - 200% (In steps of 5%) 2. Earth Fault: 5% - 80% (In steps of 5%) 3. High set O/C: 0.5 – 15 times In or more. 4. High set E/F: 0.5 – 12 times In or more. 5. Time multiplier for: 0.05 – 1.0 (In steps of 0.025) (Independent for O/C & E/F) 6. Time delay for high set element : 0.02 to 2 sec (in steps of 0.01 sec) 7. Pick up: Within 1.1 times of set current value. 8. Reset current: 95% to 90% of pick-up current. 9. Operating Time: As per selectable characteristic. For Inst. Element < 40 ms for 2xIn. (D) Other Features: 1. Provide sufficient number of potential free contacts to cater
the needs of connection to alarm annunciation.
• Output contacts: Minimum 2 N/O contacts with
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- Continuous carry 5 A - Make & Carry for 0.5 s 30 A - Make & Carry for 3.0 s 15 A
• Signaling contact: Minimum 4 Nos for following signals - Relay Faulty - Relay Operated - High set operation - IDMT operation
2. Local PC Communication:
• RS232/RS485 3. Housing
• Flush Mounting
• Screw Terminals (‘O’ Lug for CT Connection)
• Degree of Protection IP51
4. Temperature and humidity
(a) Ambient temp -10 to 55 o C (b) Relative humidity 10% to 90%
Non Condensing (c) Operate range 0-95% (d) Storage temp. -40 to 70 o C
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SCHEDULE – B
GUARANTEED TECHNICAL PARTICULARS
(TO BE FILLED IN BY THE BIDDER AND FURNISH WITH TECHNICAL BID) The GTP is to be filled up in this format and, in the page of Bid Specification only, to be submitted in duplicate along with the offer. This is intended for speedy comparison of various bidders GTP. The Bidder shall fill in the particulars against appropriate items in respect of each rating and type of Protective Relays offered in the broad categories listed below:
(1) NUMERICAL NON-DIRECTIONAL OVERCURRENT AND EARTH FAULT RELAY WITH HIGH SET
1 Make
2 Type
3 Rating
4 Auxiliary Supply
settings
5 Over Current
6 Earth Fault
7 High set O/C
8 High set E/F
9 Time multiplier
10 Whether independent for O/C and E/F or not
11 Time delay for high set element
12 Pick up value
13 Reset current
14 Operating Time For Inst. Element
15 No. of tripping contact
16 Tripping contacts rating Continuous carry Make & Carry for 0.5 s Make & Carry for 3.0 s
