PROVN OF 01 x 3.15 MVA CAPACITY 33/11 KV TRANSFORMER ALONGWITH ITS CONNECTED ITEMS AT NAGTALAO UNDER GE BANAR

Supply, installation, testing, & commissioning outdoor type Power transformer of capacity 3.15 MVA (3150 KVA) step down outdoor floor mounted, strip type Double copper wound 3 phase 50 cycles AC oil immersed ONAN having no load voltage ratio 33/11 KV, (corresponding to principal tapping) winding delta connected to primary side ( HV side) and star connected to secondary side (LV side). In accordance to appropriate vector group with neutral brought out to separate insulated terminal bush for earthing provision and Off-load tap changer (OCTC) with range +5% to -10% in steps of 2.5% on HT side to very secondary voltage. The temperature rise shall not exceeding 50 degree C by thermometer in oil and 55 degree Celsius by resistance and transformer conforming to latest edition of IS 2026 all as directed and specified. The Manufacturer Lab must be NABL approved to ascertain genuine product quality. The following fittings and accessories including first fill of transformer oil & Transformer shall be painted with two coats of synthetic enamel paint with two coats of expoxy paint as per IS -632 necessary mounting on PCC floor mounted type as per manufacturer's recommendations and specifications complete. Transformer shall be of BOLTLESS core design. Transformer shall be double wound, core type with low loss, non ageing, high permeability PRIME GRADE, CRGO with m4 grade or Better, Perfectly insulated and clamped to minimize noise and vibrations. Before placing order for procurement of transformer, the contractor shall submit the credentials and transformer shall be procured only after approval from GE in respect of name of manufacturer of transformer as well as manufacturer of core. The limit of termperature rise after continous full load runs as specified in IS/IEC 60076 shall be suitably adjusted to suit the ambient temperature of maximum 50 degree celsius prevailing at site all as specified and directed including having following characteristics complete all as specified and Directed. Make :- ABB / Siemens / Schneider / Bharat Heavy ELectricals Limited (BHEL) / Andrew Yule

(a) Transformer Lifting lugs, Top cover lugs ,Cover lifting eyes & jacking Pad,skids. (b) Earthing terminals- 2 Nos for body earth & neutral earthing bushing terminal on transformer top cover (c ) Oil Conservator with Oil filling hole with plug and cap drain valve and magnetic oil level gauage, oil level indicator. (d) Sample valve/ Drain valve (e) 04 Nos Bi-directional plain/Flat rollers (f) Explosion relief vent mounted on tank with double diapharm and equalizer pipe connected to conservator of space ( pressure relief valve). (g) Rating plate & Diagram Plate, Inspection cover, Terminal Making Plate , Thermometer Pocket. (h) Air Vent Plug / Air release Plug (j) Silica get Breather with connecting pipe with first fill of dehydrating agent and oil seal . (l) Cooling Radiators. m) Filter valve with threaded adopter at top and bottom (n) First Filling of new Transformer Oil with dielectric strength min 60 KV. (o) Double float Buchholz Relay with Contracts for Alarm & Trip Contacts (p) 150 mm dia Oil Temp indicator (OTI) having 0 to 120 C with maximum reading pointer resetting device and electrically opearted separate set of contacts and Trip. (q) 150 mm dia Winding Temperature indicator with Alarm & Trip Contacts . (r) Marshalling Box (s) Hand hole of sufficient size for access to the interior of tank. (t) Shut of valve between conservator and main tank. (u) Clamping device for clamping the transformer with foundation channel. . (v) Foundation channel for embedding in foundation (w) Extra bushing for neutral on LV side. (x) HV bushing with arcing horns on HV side ( 33 KV side). (y) Cable end box on secondary side for HT cables 11 KV of suitable size. (z) Off Circuit Tap Changer on HV Side.

Note :- (a) Transformer shall be inspected by inspecting officers nominated by the Accepting Officer at manufacturer's premises and all desired test shall be carried out in accordence to IS: 2026. (b) Armoured control copper conductor cables of required size , length and core for making connections and functioning of all controll devices / panels / accessories shall be provided by firm all as required at site. The cost of the same are deemed to be included in the rate quoted by the Contractor. (c) Routine test as per IS 2026 shall be conducted and test certificate shall be furnished. (d) The erection of the transformer shall be done under the supervision of manufacturers authorized representative. (e) Cost of Foundation and civil works for transformer as per manufacture's recommendation shall be deemed in quoted rates. (f) The design of transformer shall be in accordance to relevant clauses specified in PS . The accessories /devices not mentioned here but necessary to provide as per relevant standard , shall be provided by the firm without any extra cost.

Supply and install HT 33 KV 3 Phase 50 cycles totally enclosed metal clad SF6 gas insulated outdoor VCB switch gear having rupturing capacity upto 350 MVA , Numerical/Digital type Over load and earth fault protection, Digital Ammeter & voltmeter and of rating up to 630 Amps along with separate remote control panel for 33 KV outdoor breaker.Class of breaker C1-M2,rated voltage 36 Kv, insulation level(Kvp) 1.2/50 micro second pulse with stand voltage of 170v,maximum permissible switching over voltage 112v, operating mechanism spring charged, No of trip coils- two nos common for 3 pole, each having the capacity to trip all three pole sucessfully, trip coil and closing coil voltage 30 V DC. Theauxillary supply voltage shall be 85% to 110% of the rated 30V in supply for closing coil and the same shall be 70% to 110% for tripping coil. The operating voltage for motor operated spring charged mechanism shall be 400V AC, 3phase, 50Hz or 230V 1-phase,50Hz. the motor shall operate at a voltage of 85% to 110% of the supply voltage all necessary fitting and other accesseries of Outdoor 33 kv SF6 gas insulated VCB breaker and indoor remote control panel will be deemed to be included as per manufacture's specification Make :- ABB / Siemens / Schneider / Bharat Heavy ELectricals Limited (BHEL) / Andrew Yule :-

(1) Outdoor 33 KV SF6 gas insulated VCB breaker (a) Two No 30 volts DC tripping coil. (b) One No 30 volts DC closing coil (c) One No spring charged motor suitable for 230 volts AC supply (d) Mechanical on/off indicator showing spring charged and spring free position. (e) One set of mechanical trip and close lever (f) One set of cable terminal block located at safe distance inside the box for control cable . (g) one set of cable entry glands for control cables . (h) Crank for manual charging spring (j) One 80 watt 230 volts space strip heater with thermostat and switch. (k) One No local and remote operation switch . (l) One 1.6 mm thick CRCA sheet fabricated factory made, cubical panel, powder coated out door type for the circuit breaker, totally enclosed, floor mounted comprising of:- (i)Auxiliary switch with four No and four NC contracts as recommended by the manufacturer (ii) Operation recording meter mechanical (iii) Manual / auto and local remote arrangement (iv) 02 Nos earthing terminals. (v) Other accessories as provided by the manufacturer. (m) Arc proof cable covers with self interlocking mechanism earth switch, disconnector. (n) Mechanical indications for breaker ON, OFF, EARTH TRIP, Spring Charged-Discharged.Integrated non-removable spring-charging operating handle and ON/OFF push buttons mechanically attached to the mechanisum. (a) Live tank SF6 breaker with rated pressure of SF6 in operating chamber at 20 degree C - 5 kg/sqcm with motorised spring type operation for closing and opening. (c) No of poles - 3 with SF6 gas parameters as per IEC-60376.

Remote control panel for 33 kv outdoor Breaker type tested indoor type made out of 2 mm thick CRCA sheet duly powder coated internally and externally complete with all interconnecting with CT, PT ,VCB by suitable size of copper control cable and comprising with the following accessiories: (A) Control & Relay Panel. (i) Control & Relay Panel - Siplex type - 01 No. (ii) Colour code wiring - 01 No. (iii) Paint shade - 631 of IS5 - 01 No. (iv) Neoprene Gaskets - 01 No. (v) Degree of protection - IP55 - 01 No. (vi) Control voltage - 30 V DC - 01 No. (B) Meters. (i) Digital Ammeter with ASS - 01 No. (ii) Digital voltmeter with VSS - 01 No. (iii) Multifunction Meter - 01 No.

(iv) Energy Meter - 01 No. (C) Indication Lamps LED Type. (i) Breaker ON - Red - 01 No. (ii) Breaker OFF - Green - 01 No. (iii) Auto trip indication - Amber - 01 No. (iv) Trip circuit healthy - Clear - 01 No. (v) Spring charged - Blue - 01 No. (vi) RYB Indication - 01 No. (D) Accessories. (i) Push Button for trip circuit healthy check - 01 No. (ii) Trip Neutral close switch - 01 No. (iii) Local remote switch - 01 No.

(iv) Panel space heater with thermostat & switch - 01 No. (v) Panel illumination lamp with switch - 01 No. (vi) 2/3 pin plug with switch - 02 Nos. (vii) 12- Window Annunciator - 01 No. (viii) Hooter - 01 No. (E) Relays. (i) Numerical communication non-drawout type relay with 50/51/50N for overcurrent, overvoltage and earth fault protection- 01 No. (ii) Trip Circuit supervision relay - 01 No. (iii) Master trip relay - 01 No. (d) Transformer Differential Relay-01 No as per suitable PS class CTs connection in 33 KV side and 11 KV side - 01 No. (i) Auxiliary relay -03 Nos for protection of following: (aa) One for Buchholz Relay alarm & trip (ab) Second for Oil Temp alarm and trip (ac) Third for Winding Temp Alarm and Trip

Note :- (i) Necessary PCC work for installation of breaker & control panel as per manufacture design is deemed to be included in quoted rates. (ii) 33 KV SF6 Breaker shall be inspected by inspecting officers nominated by the Accepting Officer at manufacturer's premises and all desired test shall be carried out without any extra cost . (iii) All test Earth Fault,over current, over voltage etc will be carried out at site in presence of rep of accepting officer/SEI without any extra cost

Supply, installation, testing, & commissioning of Floor mounted,Indoor type OEM factory manufactured,Extendable HT 11KV VCB panels switchboard consisting of 630A VCB 11 KV-01 Nos as incomer , 630A VCB11KV-01 Nos as outgoing VCB panel indoor type totally enclosed free standing floor mounting type ,compartment based with truck mounted vacuum circuit breaker spring operated electrically and manually charged operating mechanism suitable for horizontal isolation,horizontal draw out type VCBs with Aluminimum bus bars self supporting insulated busbar with full voltage rated should be used .complete VCB panel confirming to IEC 62271-200 standard and IP 4X class of protection comprising necessary bus bars extension and connections and following protective and control devices as specified below.Vaccum interrupters of the circuit breakers shall be completely encapsulated in epoxy housing .the manufacturer of circuit breaker shall also be the manufactures of the vacuum interrupter, relay . the switchgear and control gear panels shall be have rupturing capacity 25kA complete, complete all as specified and directed by Engr-in-charges Make :- ABB / Siemens / Schneider / Bharat Heavy ELectricals Limited (BHEL) / Andrew Yule.