GE ELECT/TOKEN-71/2026-2027

Supply & install ,testing and commissioning of transformer as per IS : 1180 part - I, level - III latest Version ,step down, copper wound 11KV/433 Volts (at no load) AC 3 phase 50 Hz 315 KVA capacity, core type, oil immersed naturally air cooled, oil natural air natural (ON/AN) , with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) in accordance with vector group DYn-11 with neutral brought out on secondry side (LV) and having taping at +5% to +10% in steps of 2.5% on HV side to be changed by means of hand operated off load tap changergear. The maximum temperature rise should not exceed 50 degree celsius in oil and 55 degree celsius in HV/LV winding when measured by resistance method after continuous full load run on an ambient temp of 40 degree celsius 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. The transformer shall be IS/IEC 60076and as per IS-1180 part - I of 2014 marked complete all as specified and directed by Engr-in-Charge and shall comprise of the following :-

(a) One cable box on HT side (Primary side) consisting of three nos porcelain bushing with copper rods, complete with nuts and washer , with cable glands suitable for reception/taking out 3 core 120 Sqmm, HT 11000 volts grade, XLPE insulated and PVC sheathed, heavy duty , armoured cables including jointing materials complete. (b) One cable box on LT side(secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers, with cable glands suitable for reception/taking out single core 630 sqmm, LT 1100 volts grade, PVC/XLPE insulated and PVC sheathed, heavy duty, armoured cables including jointing materials complete. (c) conservator with filter type drain valve and oil level guage. (d) De-hydrating breather with first fill of dehydrating agent (Silica Gel). (e) Explosive vent, Thermometer pocket on tank cover, oil level guage, Oil drain filter valve, at bottom of the tank Lifting ligs,oil filling hole with cap/plug with connection plate complete, Air release valve plug and four nos plain solid cast steel detachable rollers. (f) One No 100 mm dia, dial type thermometer, vapour pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device. (g) Two earthing terminals on tank cover to facilitate fixing of 50x6mm galvanised iron earth strip for earthing of body.

(h) Rating plate and terminal marking plate. (j) Extra bushing for neutral in the LT cable box for providing independent set of earthing for neutral. (k) First fill of new and unused transformer oil, IS-335 of 1986 marked, filtered and tested upto 50 KV dielectric strength at 2.5 mm air gap between testing electrodes, specific resistance at 27 Degree celsius Ohm-om 500 x 10 the power12, water content 50 PPM, Dielectric dissipation factor (tan Deta at 90 degree celsius) 0.005, Neutralisation value mg of KOH/gm of oil 0.03, Inter facial tension N/M at 27 Degree celsius - 0.04, flash point 140 Degree celsius and sluge 0.1 % by weight. (l) Providing adequate size and nos of channels, embeded in floor, for movement of transformer. (m) Tranformer losses shall not exceed the loses mentioned in Table 6 of IS: 1180 of 2014 Part - I with energy Effeciency level - III. (n) Oil temperator indicator , winding temperature indicator, marshlig box single window, double flit buchoiz relay with alarm and trip contact including connection to existing RMU/VCB relay with PVC insulated PVC sheathed cable galvanized steel strip or wire armoured electric control cables (Heavy duty) with stranded copper conductor of size 1.5 sq mm 10 core 1100 volts grade.NOTE :- (i) Rate quoted includes the cost of making and Testing of controll wiring connection at the Transformer and RMU/VCB for the Temperature alarm/Trip, Gas alarm/Trip.

M&L XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured,electric power cables (heavy duty) with aluminium conductor, 11000 volts, (E) grade cross sectional area 120 sqmm, 3 core complete all as specified and directed by Engr-in-Charge

M&L Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm.complete all as specified and directed by Engr-in-Charge

M&L Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm. complete all as specified and directed by Engr-in-Charge

Material and labour for earthing complete with galvanized steelearth plate electrode of size 60cmx60cmx6 mm thick, burieddirectly in ground (earth pit not less than 3.5 m below normalground level) with top edge of earth plate not less than 2.5mbelow normal ground level, connected to galvanized iron strip 32X 6 mm by means of electric arc welding of galvanised iron orsteel as shown in electrical plate No 3 of SSR Part I, connected toearth test point and the equipment on the other side complete allas specified, including testing and commissioning complete all as specified and directed by Engr-in-Charge. Note : - (a) The unit rates quoted against this item shall bedeemed to include the cost of excavation and earth work in anytype of soil, common salt & charcoal dust in alternate layers, PCC1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessaryreinforcement as in cover & frame for pit, funnel, watering pipe 20mm bore GI pipe light grade, protection pipe 40 mm bore GI pipelight grade etc.(b) The quoted rates shall also deemed to include the cost ofearth test point and earth strip/GI earthing and protection pipeupto 7.5 meter beyond the earth plates electrode.

Supplying , installation, testing and commissioning of 11 KV, 630 Amps having short circuit capacity 20kA/3-sec, Outdoor (IP54), RMU (Ring main unit) 4-way with front cable design and comprising of 02 Nos motorized operated Load Break Switch and 02 Nos 630 Amp Fixed-Type motorized spring-charging VCB electrolytic grade copper busbars all inside single, gas-filled, robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank with min. thickness 2.5 mm as per type tested design, IP 67 Degree of Protection , internal-arc classified 20kA/1sec. The outdoor design with separate or additional encloser is not acceptable. The unit alongwith Bus-connected, fixed-type metering cubicle and shall include the following along with all necessary accessories and fittings as required at site and complete all as specified and directed by Engr-in-Charge.

(A) 02 Nos. Incoming Load Break Switch module each consisting of following accessories :- (i) Each switching-unit is designed as a three position switch. This three function switch combines the functions of switch-disconnector and earthing switch and type tested for 5000 mechanical operation. (ii) 11kV, 630A Load Break Switch with interlocked line-earthing scheme both short circuit current - 20kA/3-sec, Making Capacity - 50kAp -01 No (iii) Auxiliary contacts - 1NO + 1NC-01 No (iv) Spring-assisted snap-action motorized mechanism with un-inhibited operating shaft for emergency manual operation with integrated earthing switch -01 No (v) Cable terminals with double-door arrangement for enhanced safety (IP54) interlocked to prevent access upto 11 KV , 300 Sqmm , 3 Core , XLPE AL cable termination in live-condition. Each Set of 03 (vi) Right angle boots (push on type)-Each Set of 03 (vii) Arc proof cable covers having cable entry from bottom , front with Interlocking mechanism including earth switch -01 No (viii) Capacitive voltage indication fixed type system as per IEC61243 with LED - 01 Set (ix) ON, OFF, EARTH mechanical indication on the front mimic of the panel - 01 No (x) LBS Should be provided with electromagnetic interlock to prevent accidental closure of earth switch when cable end is live and LBS is in open position. (xi) Both LBS must be mechanically interlocked to prevent simultaneously closing.

(B) 02 Nos. Outgoing VCB module each consisting of following accessories :- (i) Each function-unit consists of a vacuum-circuit breaker in combination with a three position-switch.The three-position-switch fulfills the operation of the disconnector-function and earthing function. The vaccum interrupter shall be of same make. (ii) 11kV, 630A Fixed-Type VCB module with series disconnector cum earthing switch of short circuit breaking current/withstand - 20kA/3-sec, Making Capacity - 50kAp-01 No (iii) Aux. contacts - 1NO+1NC-01 No (iv) Stored-energy motorized high-endurance spring charging mechanism (M2 i.e. 10000 mechanical operation) class, with inbuilt spring-charging lever and mechanically latched ON/OFF push-buttons to allow handle-less and un-inhibited operation -01 No (v) Cable terminals with double-door arrangement for enhanced safety interlocked to prevent access upto 11 KV , 185 Sqmm , 3 Core, XLPE AL cable termination in live-condition. Each Set of 3 (vi) Right angle boots (push on type)-Each set of 3 (vii) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. Relay should have facility to display the maximum loaded phase current also.Relay shall record minimum 5 fault records with time stamping. Relay shall be communicable with RS 485 Port on MODBUS Protocol-01 No (viii) (viii) Associated ring-core cast-resin insulated CTs (each set of 3) with burden 2.5 VA, accuracy class 5P10 for protection.CT ratio ratng: 30-60/1A .- Each Set of 3. (ix) Arc proof cable covers with self Interlocking mechanism with earth switch -01 No (x) Capacitive voltage indication fixed type system as per IEC61243 with LED -01 No (xi) Push button for breaker trip (xii) Shunt trip coil 24V DC - 01 (xiii) ON, OFF, TRIP mechanical indication on the front mimic of the panel - 01. (xiv) Emergency Trip Push Button - 01. (xv) MFM,CLASS 0.5