SPL REPAIR REPLACEMENT TO BER VACCUM CIRCUIT BREAKER UNDER GE GANGTOK

Amount

Material and labour for complete removal of the BER OCB/VCB from the foundation/ electrical cables bus bars complete with out damaging the installation and the equipment isolating all the cables, complete and shifting the retrived Breakers with in the permises of the New cantt to Store yard under GE Gangtok

Supplying, installing, testing and commissioning of Indoor arc flash protected Draw-Out with roll on floor type Vacuum Circuit Breaker Panel , rated for 12kV, 800 Amp, STR 26.3kA/3-sec,Short Circuit Making Current 65KA comprising of 01No. Incomer, and 05 Nos. Outgoing VCB Panels at MES POWER HOUSE /Substation under GE Gangtok and floor-mounted Bus PTs for each bus section (Incommer Panel-01 No and Outgoing Bus -01 No), confirming to IEC 62271-200, Internal Arc Classified IAC AFLR – 26.3kA for 1sec, Accessibility Class LSC2B-PM Class, comprising of 800 Amp, continuous rated silver plated tinned Copper busbars and droppers in all bus / breaker/ adaptor and and cable chambers, The busbars to be covered with insulating material, The earthing busbar is made of electrolytic copper and it runs longitudinally throughout the switchgear Encapsulated feeder connections IS3427 and IS12729. with 02nos. . Rack-In-Rack-Out Handles, structure made from AluZinc/GI sheets to prevent corrosion and rusting.The complete panel incl. HT and LT chamber with FRLS wiring and acessories shall be manufactured by approved OEM at its own mancufacturing in house facility, and same will be verified via stage/final inspection. system house integrator / channel partner products are not accepted .The panel shall consist of following OEM / (Make of Relay / Vaccum Breaker Pots/ Breaker Panels should be of same OEM for better intigration) Note: These HT pannels shall be clubbed / supplied such a way with incommer panel on the right side / last breaker and the outgoing panel -06 no shall be on the left side of the incommer panel to the operator / SBA

(A) 01 x Incomer Panel, each comprising of :- (i) 11kV, 800 Amp, 26.3kA/3-sec, Draw-Out Vacuum Circuit Breaker as per IEC-62271-100/200 with roll on floor type Vacuum Circuit Breaker having 03 Nos. vacuum bottles of same make as of circuit breaker and panel, motorized spring charging mechanism (230VAC) with integral spring charging handle for manual charging, associated push-buttons, anti-pumping feature, and associated Shunt Trip/Close Coils (24VDC). (ii) Current Transformers 11kV, 300/150/5A/1-1A Core1: Class 5P10, 5VA, Core2: Class 0.5, 5VA, Remote HMI, Digital electronic governor with temperture Core3: Class PS-X - Set of 03 No per breaker(RYB) (iii) Potential Transformers, Draw-out type for easy maintenance, 3 phase 11kV/rt3:110V/rt3, 50VA, Cl.0.5 with associated gun-type HRC fuses and MCBs for HT/LT isolation - complete set per breaker

(iv) Main Protection Relay shall be numerical IED Relay confirming to IEC60255, having 04CT+05PT Inputs with microprocessor based protection scheme for tripping the breaker on various faults like (a) Directional over-current or earth-fault in any of the three phases, (b) Synchronism and Energizing Check before breaker closing to prevent un-syncronized mixing of supplies (c) circuit-breaker-failure alarm, (d) interpanel tripping/blocking signals via GOOSE based peer-to-peer communication, on IEC61850 protocol. (e) Integrted arc flash protection with current and light sensing The relay shall be communicable on IEC 61850 GOOSE platform over RJ-45/USB/FO port, and fully integrated with the feeder, internally capturing feeder statuses incl. various status, Line-Current, Line-Voltage, Breaker On/Off/Spring.Chrgd, Trip Circuit Failure (from TCS relay), AC Supply Fail, PT Fuse failure relay, Local-Remote etc. and display locally on a built-in back-lit LCD screen with mimic as a Single-Line-Diagram with power & frequency measurements and suitably labelled status LEDs. Relay setting should be possible through inbuilt software or through addtional software supplied with life time software support by the relay manufacturer.

(v) Metering Equipment including:- (a) 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), (b) 01no. Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port. (vi) LED Indications :- (a) Breaker ON/OFF/TRIP/Spring-Charged, (b) R-Y-B, (c) DC Available LED with push-button (d) AC Supply Fail (e) Trip Circuit Healthy (vii) 08-Window Annunciator with Hooter to indicate following alarms :- (a) OC Trip, (b) EF Trip (c) Trip Circuit Failure, (d) Inter-Tripping Fault, (e) Synchro-Check. (f) PT Fuse Failure The Annunciator will be complete with required Acknowledge/Test buttons as required

(viii) Control Equipment incl. :- (a) 01 x TNC Switch, (b) 01 x Local/Remote Switch, (c) 01 x Emergency Trip Push Button, (d) MCBs for AC (e) MCBs for DC (f) Heater Switch with Thermostat - 01no. (g) 3-pin socket with ON/OFF switch - 01no. (h) LED Lamp with ON/OFF switch - 01no. (ix) Flush mounted Auxillary Protection Relays incl:- (a) Trip Circuit Supervision Relay, (b) Master trip Relay, (c) PT Fuse failure relay. (d) DC Supervision Scheme (x) Suitable Disconnecting Link type terminal arrangement shall be provided for interfacing PS-Class CTs installed in the panel for achieving the required protection.

(xi) AUXLAIRY POWER PACK / DC Battery / Power Bank (a) Power Pack Should be of 220 Volt/ 24 Volt DC (b) Fuse/ MCB for protection (c) Indication LED for input and iutput supply (d) DC Distrubution MCBs (e) Maintance Free Lead Acid Battery for 6 Hrs Back UP (f) Externally mounted (g) AC and DC Voltmeters / Ammetres (h) Axial Flow Cooling Fans (i) AC Input MCBs (j) Thyristor Based Rectifiers heavy Duty Note: Rate quoted incldes the cost of 3 core 6Sqmm copper cable run trough 25mm rigid conduit with acessories from DB/ power socket to charger not exceeding 15 mts length and 2 core 2.5 sqmm copper cable run through 20mm rigid conduit withacessories per circuit of the DC distrubution panel of charger to 11KV VCB panel DC thimbiles/connectors/ MCBs not exceeding 25 mtr length per circuit

(B) 05 x Outgoing Panel, each comprising of :- (i) 11kV, 630Amp, 26.3KA/3-sec, Draw-Out Vacuum Circuit Breaker as per IEC-62271-100/200 Vacuum Circuit Breaker having 03nos. vacuum bottles of same make as of circuit breaker and panel, motorized spring charging mechanism (230VAC) with integral spring charging handle for manual charging, associated push-buttons, anti-pumping feature, and associated Shunt Trip/Close Coils (24VDC). (ii) Current Transformers 11kV, 150-75/5A/1-1A, for 2 breakers and 100-50/5A/1-1A for 3 breakers Core1: Class 5P10, 10VA, Core2: Class 0.5, 10VA - Set of 03 Nos.each/ breaker (RYB)

(iii) Main Protection Relay shall be numerical IED Relay confirming to IEC60255, having 04CT Inputs with microprocessor based protection scheme for tripping the breaker on various faults like (a) over-current or earth-fault in any of the three phases, (b) circuit-breaker-failure alarm, (c) interpanel tripping/blocking signals via GOOSE based peer-to-peer communication, on IEC61850 protocol. (d) Integrted arc flash protection with current and light sensing. (e )Transformer protection (Marshalling Box and Buchhloz relay). The relay shall be communicable on IEC 61850 GOOSE platform over RJ-45/USB/FO port, and fully integrated with the feeder, internally capturing feeder statuses incl. various status, Line-Current, Breaker On/Off/Spring.Chrgd, Trip Circuit Failure (from TCS relay), Local-Remote etc. and display locally on a built-in back-lit LCD screen with mimic as a Single-Line-Diagram with current measurements and suitably labelled status LEDs. Relay setting should be possible through inbuilt software or through addtional software supplied with life time software support by the relay manufacturer.

(iv) Metering Equipment including:- (a) 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), (b) 01no. Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port. (v) LED Indications - (a) Breaker ON/OFF/TRIP/Spring-Charged, (b) Trip Circuit Healthy (vi) 08-Window Annunciator with Hooter to indicate following alarms :- ( for 5 No outgoing) (a) OC Trip, (b) EF Trip (c) Trip Circuit Failure, (d) Inter-Tripping Fault, The Annunciator will be complete with required Acknowledge/Test buttons as required (vii) Control Equipment incl. (a) 01 x TNC Switch, (b) 01 x Emergency Trip Push Button, (c) 01 x Local/Remote Switch, (d) MCBs for AC/DC isolation (e) Heater Switch with Thermostat - 01no. (f) 3-pin socket with ON/OFF switch - 01no.

(g) LEDLamp with ON/OFF switch - 01no. (viii) Flush mounted Auxillary Protection Relays incl. (a) Trip Circuit Supervision Relay, (b) Master trip Relay, (ix) Transformer protection each comprising of :- (for 1 No outgoing) (a) Oil Temperature high. (b) Winding Temperature high. (c ) Tank oil level low. (d) OLTC oil level low. (e) Buchhloz relay trip or sudden gas and sudden oil pressure relay trip. (f) Pressure relief. Note Make of Relays: Relays shall be of self powered with feeder protection options for Incommer breakers and Bus couplers , Transformer /feeder protection relays on out going side as per the site requirement. (i) Cost of construction of foundation as per manufacturer design, including foundation frame (supplied by OEM), channels etc. for HT Panel as required at site are deemed to be included in the quoted rate.

(ii) Each VCB panel being floor-mounted, air-insulated, fully-compartmentalizeds The OEM shall supervise and certify the commissioning/charging of equipment. (iii) Foundation frames shall be inclusive in the scope of supply of OEM. (iv) All Multi-function-meters shall be connected in a ModBus loop terminating into 01 No. ModBus-to-TCP/IP converter to be provided for sending data to SCADA console via networking switch. (vii) All Incomers and BusCouplers will have suitable schemes in place to prevent mixing of un-syncronized supplies using Line/BusPT signals. Any such attempt will be reported by a suitable alarm. This facility should be implemented over soft-logic, and can be disabled by authorized personnel without requiring any on-site re-wiring. (viii) All Outgoing VCBs will have inter-tripping logic in place to ensure that Incomer breaker immediately trips in case of failure of opening of outgoing VCB experiencing feeder fault. Special and dedicated Alarm shall be in place to issued the user. This facility should be implemented over soft-logic, and can be disabled by authorized personnel without requiring any on-site re-wiring.

(ix) Rate quatoted includues the cost of making new/ modification of the existing PT supply for controlls/ instrument system with necesssray controll wiring and controll contactors of rated capacity and voltage levels (x) Ring core current transformers / The toroidal transformers are to be of epoxy resin insulated type and are used to measurement and protection devicesfor measuring phase currents or for detecting the earth fault current. confirming to the IEC 61869-1, IEC 61869-2 (xi)The voltage transformers are of the epoxy resin insulated type and are for measurement and protection devices conform to the IEC 61869-1, IEC 61869-3 installed on removable or withdrawable trucks they are fitted with medium voltage protection fuses.The withdrawable trucks also to allow replacement of the fuses with the switchgear in service. Truck racking-out with the door closed automatically operates closure of a metallic segregation shutter between the live parts of the switchgear and the instrument compartment.

Supply and fix cable jointing kit for 11 KV grade cable for indoor termination , Cold shrink type , joint complete with jointing material and accessories suitable for 3 core XLPE , armoured , Al conductor cable of size 120 to 185 Sqmm complete all as specified and directed

M&L for GI Strip 32x 6 mm burried in ground / laying on wall / roof / ceiling complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode 60 cm x 60 cm x 6.00 mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate electrode not less than 1.5 m below normal ground level, connected to including galvanised iron strip size 32 x 6 mm by means of bolts, nuts, and washers of galvanized iron or steel all as shown in electrical plate No. 3 of SSR Part I connected to earth test point including provision of earth strip protected by 40 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade GI pipe including all excavation and earth work in any type of strata, PCC pit with RCC cover, CI frame, char coal, salt & funnel etc complete all as specified or indicated including testing on completion. Rate to be considered for earth strip to be fixed 7.5 m long.all as specified and directed by Engr-in-charge including taking down old one. Note- Rate quoted included the cost of earthwork , GI protection & GI strip from earthpit to 7.5 Mtr

Supply and fixing 11KV insulation Rubber Mats complete ISI marked class B 1mtr x 2 mtr x 2.5mm thickness blue colour/ black / grey colour anti skid / shock proof complete all as specified and directed

PREM LAMA (BID ID -3454395)

BHARAT MULTITECH INDUSTRIES PVT LTD (BID ID -3458125)

Jessica Engineering Works (BID ID -3460579)

ISLAND SALES ENTERPRISES (BID ID -3460591)