SPL REPAIR/REPLACEMENT OF BER VCB AND CONNECTED ACCESSORIES AT AGE BER SUB STN AT KALINA MILITARY CAMP UNDER GE (NORTH) SANTACRUZ, MUMBAI

Supplying installation, testing and commissioning of Indoor Vaccum Circuit breaker (Incomming cum Outgoing), totally metal clad horizontally isolated and horizontally drawout type Consisting of VCB 400 amps HT 11 KV, should be capable to operate at voltage variation of ±10%, corresponding highest system voltage 12 KV, 3 phase, frequency 50 Hz with ±3% tolerance, breaking capacity of 13.1 KA, having rupturing capacity 250 MVA for 3 seconds horizontal isolation conforming to IS-13943 of latest versionand horizontal draw out type 11 KV totally enclosed extensible pattem with automatic drop down and independent spring charging type motor operated closing mechanism including motor suitable for operation on 230 volt single phase 50 cycle AC supply system and manually operating system with 30/110 volt DC shunt trip coil with Auxiliary switches mechanical ON/OFF indicator with protective relays and conforming to IS 3427 of 1997 to latest amendement, suiatble for tropical conditions of max ambient temperature 50 deg and minimum temperature 3.5 deg with relative humidity 10% to 95%, with main bus bar shall be of copper, the Vaccum circuit breaker shuold be of truck/trolly mounted and must have three nos resin encapsulated vaccum bottles of same manufacturer as of circuit breaker, and vaccum bottles shall be epoxy encapsulated, the vaccum circuit breaker shall be fully tested for internal arc (13.1 KA for 3 sec) as per latest IEC 62271-200 at CPRI/ accredit lab complete all as specified with and including following items:-

(a) Auxiliary Power supply :The Auxiliary electrical equipments provided by the manufacturer for specified operation of the circuit breaker shall be suitable for operation for AC control & protective devices, lighting fixtures, space heaters 100 watt and motors AC supply 1 phase 2 wire, AC supply with one point grounded voltage : 240± 10% and frequency should be 50 Hz± 10%. For DC alaram, control and protective devices D.C. supply 2 wire, DC source from batteries with midpoint grounded. The available DC supply voltage is 30 V DC, Voltage : 30 V, -15% to +10% b) Operating Mechanism Housing and Breaker Cabinets: The specification covers the requirements of control cabinets and associated equipment. Cabinets shall preferably be of the free standing floor mounting type for HV CBs. Sheet steel shall be at least 3.0 mm thick. Control cabinets shall be provided with double hinged door and padlocking arrangement. The enclosures shall be dust, moisture and vermin proof, to provide a Degree of protection to IP 55 in accordance with IS 12063/1987, 15mm thick neoprene or better type of gaskets shall be provided to ensure degree of protection of at least IP55 as per IEC: 529.It shall be accommodate following items:Mechanical ON & OFF knobs (TNC), Electrical ON/OFF push buttons, CB Mechanical ON/OFF indicator, CB Electrical ON/OFF indicator,Mechanical spring charged indicator, Electrical spring charge indicator , Auxiliary A.C./D.C. supply indication, Conveniently located manual emergency trip, Auxiliary switches as specified elsewhere in this Specification, Control cable termination connector blocks, One power plug along with control switch (240V, 10A), Space heater along with ON/OFF switch and Thermostat, Cubical illumination lamp with switch, Mechanical Operation counter to register the number of breaker operations, Trip circuit Healthy-1 indication, Trip circuit Healthy-2 indication or any other as specified by the manufacturer shall be considered. (c) Self powered microprocessor controlled numeric relay comprising of two over current, one earth fault protection relay with high set for both phase and earth and with fault memory universal auxiliary supply as per IS-3231, 8686 The setting for over current shall be upto 200% of 5A and for earth fault element .

(d) Cast resin copper wound Current transformer(CT's) one set of three of ratio 50/25/5+5 Amps having 15 VA burden class 1.0, for metering and class 5P10 for protection- 01 Set of 03 Nos. (e) Cast resin copper wound Potential Transformer (PT) 11 KV / 110Volt 3 phase Potential transformer HT panel mounted, push fit with necessary fuses. (f) Digital Master trip relay -1 No & One No antipumping Relay (g) Digital type multifuction meter CT operated 110 Volts/ 30 having voltage , current, pf,frequency viewing facility (0-100 A), (0-15V) suitable for CT & PT ratio as stated above.One for each panel (h) The design, manufacture and performance of the Vacuum circuit breaker shall comply with all currently applicable statutes, regulations and safety codes. (h) Multifunction meter of Acc class 0.5, having facility to see KW, KVA, KVR ,PF, KWH, KVARH, KVAH, A, V etc & Master trip relay. (j) The circuit breaker shall be provided with motor operated spring charged closing. (k) Spring charging motor shall be suitable for 240V, 50 Hz, single phase AC. (l) Suitable rating starter shall be provided for Motor protection. Spring release coil for closing shall be suitable for 30V DC. Provision shall be available for charging the springs manually as well, and to close CB mechanically. (m) Adequate quantity of cable glands of suitable size shall be provided (n) Equipments and devices shall be suitable for operation on specified auxiliary A.C. supply system.For protection of AC/DC aux. circuits, MCBs of suitable capacity & reputed make to be provided. (o) The motor shall be adequately rated to carry out a minimum of 10 close and open operations continuously. Also provision shall be made to protect the motor against overloads. In case of failure of power supply of spring charging motor, the mechanism shall be capable of performing one sequence of 0 - 0.3 Sec - CO.The time taken for charging of closing spring shall not exceed 30 seconds. The spring charging shall take place automatically preferably after a closing operation. Name and Rating Plate: a) Circuit Breaker and its operating device shall be provided with rating plate/s made out of corrosion proof metal, marked with the following data. The data shall be either punched or engraved on the plates. b) Manufacturer's name or trade mark by which he may be readily identified.,Serial number and type designation of CB & Operating mechanism,Year of manufacture,Voltage, Lightning impulse withstand voltage, Normal current ,Short circuit breaking current, Duration of short circuit, Mass of circuit breaker with support structure, Auxiliary D.C. supply voltage of closing and opening devices, Out of phase making & breaking current, A.C. supply voltage of auxiliary circuits,Insulation level,Frequency, Operating sequence. The rating plates shall be installed in such positions that the same shall be clearly visible to a man standing on ground. i.e. at the level of eye site. Set of LED indicating lamp operating at 110V single phase as below:-

(i) RED/GREEN. VCB ON-OFF Indication (ii) AMBER: Trip Indication (iii) WHITE: Trip Circuit Healthy Indication with Push Button (iv) BLUE: VCB Mechanism Spring Charged Indication (g) 11 KV, 250 MVA 400 Amps, Three Phase Copper busbars with Rear cable termination ie. Provision for terminating 3 core XLPE Cable of required size. (h)Suitable no. of Space heater-100W (continuously rated) with thermostat control for breaker/CT compartment with manual ON-OFF switch. (j) Structural steel frame including PCC foundation and earthwork as per manufacturer specifications. (k)1 No 3 way breaker control switch with positions TRIP-NEUTRAL-CLOSE (l) Both manual spring charging and motorised spring charging and operating arrangement. (m) Suitablre size of MCBs for metering and protection circuit as per manufacturer specification. (n) (i) Auto trip. (ii) Motor/manual charged spring operating/closing mechanism. (iii) Fault alarm (iv) Manual tripping (o) All wiring necessary for the above including interconnection to trip coil. The wire should be FRLSH type in all panels. (p) Test Terminal Block (TTB) to test meters and relays with sealing arrangement. NOTE :- 1. Contractor shall produce manufacturer's test certificate for all routine and type test of VCB's 2. Rate quoted is deemed to be inclusive for above provisions and Civil works for foundation as per manual of manufacturer 3.Any spare/item required at site for functional of above VCB shall be done without any extra cost to the department. 4. Factory visit/ test shall be carried out by representative of accepting officer, contractor shall arrange the testing at manufacturer premisses before dispatch of materials from factory. 6. Commissioning of VCB pannels after installation shall be carried out by injecting current from outside source by a qualified engineer from OEM, Contractor shall arrange the tests as directed by Engineer In charge. 5. Panel should be original OEM Make.

Supply, lay, test and commissioning of HT UG, XLPE insulated, heavy duty, 11000V grade electric cable with aluminum conductor, 120 sqmm 3 core served with an inner sheathing of PVC tape armored with galvanized steel wire or tape and overall PVC sheathed, laid in trenches or passing through pipe, making all connections with and including provision of necessary glands, lugs, bushing etc as required including taking down old unserviceable cable complete all as specified and as directed by Engineer-in-Charge.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in deep for laying UG cables and getting out in soft/loose soil complete all as specified and as directed by Engineer-in-Charge.

Returning, filling in, including, spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick in any soil all as specified and as directed by Engineer-in-Charge.

Removing excavated material to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and as directed by Engineer-in-Charge

Material and labour for crushed sand filling in trenches for cable crushioning below and above the cable complete all as specified and directed by Eng- in -charge.

Supply & laying un -inforced pre cast concrete with flat cover Factory made Class HV, type 1, size 300x180x40 mm complete all as specified and directed by Eng- in -charge.