138WE/L-44/2026-27

Supply, fixing, installation, testing and commissioning of Servo controlled voltage satblizer, 3 Phase 50 Hz of capacity 100 KVA, naturally oil cooled, indoor, copper wound, digital display type, relay free smooth and silent operation with 1st filling of transformer oil (IS 335: 2018) having following specification :- (a) Input voltage 300-480 V (b) Output voltage 415V + 1% (adjustable) (c) Rated frequency 50 Hz (d) No distortion in wave form (e) Response time not to exceed 10 mili second (f) Sensitivity (+) 1% (g) Rate of correction more than 6 Volt/Sec per phase (h) Class of insulation A (j) No load losses less than 0.5% (k) Full load losses less than 2.5% (l) Duty cycle continuous 24x7 (m) Efficiency more than 95% (n) Type of load 3 phase, unbalanced type (o) Digital display Voltmeter/ Ammeter. The stablizer should inbuilt with following protection :- (i) Over load / short circuit protection (ii) High/ low voltage cut off (iii) Bypass arrangement in case of emergency (iv) Single phase sequence change protection setting complete with testing

Supply, fixing, installation, testing and commissioning of Servo controlled voltage satblizer, 3 Phase 50 Hz of capacity 150 KVA, naturally oil cooled, indoor, copper wound, digital display type, relay free smooth and silent operation with 1st filling of transformer oil (IS 335: 2018) having following specification :- (a) Input voltage 300-480 V (b) Output voltage 415V + 1% (adjustable) (c) Rated frequency 50 Hz (d) No distortion in wave form (e) Response time not to exceed 10 mili second (f) Sensitivity (+) 1% (g) Rate of correction more than 6 Volt/Sec per phase (h) Class of insulation A (j) No load losses less than 0.5% (k) Full load losses less than 2.5% (l) Duty cycle continuous 24x7 (m) Efficiency more than 95% (n) Type of load 3 phase, unbalanced type (o) Digital display Voltmeter/ Ammeter. The stablizer should inbuilt with following protection :- (i) Over load / short circuit protection (ii) High/ low voltage cut off (iii) Bypass arrangement in case of emergency (iv) Single phase sequence change protection setting complete with testing

Supply, installation, testing and commissioning of step down 11/0.415 KV capacity 250 KVA transformer level III, IS-1180 Part-I outdoor type coper wound 3 phase 4 wire, 50 cycle per second, oil immersed naturally cooled external cooling tube core type delta connection on primery side (HV side) and star connection on secondary side (LV side) having typing 0, +2.5%, +5%, +7.5% to be charged by means of hand operated, off load/ tap charging gear including first filling of new transformer oil of dielectric strength not less than 60 KV with standard fittings with such as two earthing terminals for body and one additional for neutral brought out in bushing, oil level gauge indicator for level minimum and maximum, lifting lugs, rating and terminal plate, plain breather device to prevent ingress of rain water and inserts, drain cum sampling value 20 mm bore steel with plug, dial type thermo meter, oil filling hole 32 mm threaded with plung. The transformer shall be powder coated for water/ dusft and vermin proof . Note- (i) Transformer oil shall be conforming to requirement of IS 335-1983 specification for new insulating oil for transformer. (ii) Equipment shall be suitable to operate at 4200 m above MSL at temerature variation between (-) 35 degree centigrade to (+) 30 degree centigrade, complete all as specified and/or as directed by Engr-in-Charge.

M&L for platform of transformer 250 KVA with bricks/ stone masonry work of size 2.4m x 2.9m and height upto 1.5 m as per CELZ TD No CELZ/TD-02/2022 from ground level including provn of a step with brick masonary, including plastering white wash of the same plastering and white wash upto height of transformer bottom and surrounding area fenced with chain link fencing duly supported with MS work i.e. angle iron 50 x 50 x 6 mm and braced with flat iron 25 x 25 x 6mm including provn of opening gate with same material with locking arrangement and brick work with plastering and white wash around the fencing with height 0.30 cm from GL and height of fence should be upto transformer height after installation on platform, complete all as specified and/or as directed by Engr-in-Charge.

Supply, installation, testing and commissioning out door type cubical panel board suitable for 3 phase, 4 wire, 415V, 50 Hz and tested at CPRI for 35 MVA rapturing capacity at 415 volts factory fabricated in an approved factory with CRCA sheet not less than 3.15 mm thick having modern fabrication process powder coating in approved shade having thickness not less than 100 microns provided with suitable gasket to make it dust and vermin proof and general constructions conforming to IS : 8623/93. The LT panel shall be front and back openable and having inner and outer shells. The inner shells duly compartmentalized for each control gears. The panel should have suitable size of aluminium bus-bar three phase 4 wire system having current carrying capacity not less than 1.5 times the rated current carrying capacity of the incomer ACB/MCCB. The panel should have the following incoming and out going controls duly fixed with the panel by means of suitable link plates, complete all as specified and/or as directed by Engr-in-Charge. Incoming (i) MCCB 400 Amp, 4 pole, 50 KA - 01 No. (as incomer) Outgoing (i) MCCB 320 Amp, 4 Pole 50 KA - 02 Nos. (ii) MCCB 250 Amp, 4 Pole 50 KA - 01 No. (iii) MCCB 160 Amp, 35 KA - 01 No. (iv) Digital multi functional meter VAFPP (voltage, current, frequency, power factor) - 1 No. (v) Phase indicator lamp (LED type) - 1 Set (et of three). Note - Rate of PCC pedestal and earth work in any type of soil shall be deemed included in the quoted rate of item.

M&L for change over 250 Amps off load 4 pole 415 V 50 Hz in sheet metal enclousere side handle operated including all fixing arrangement as required at site complete with incoming and outgoing connection with appropriate size of cable lugs, complete all as specified and/or as directed by Engr-in-Charge.

Supply, laying and testing of XLPE insulated, armoured, heavy duty electric cables, with stranded aluminium copper conductor rating 1100 volts grading of size 120 sqmm 3.5 core laid in trenches or passing through pipes, ducts or fixed to walls / poles, complete all as specified and/or directed by Engr-in-Charge.

M&L for earthing complete with galvanised steel earth plate electrode 600 X 600 X 6mm thick buried directly in ground vertically to a depth not less than 2.25 m deep below ground level with top edge of the earth plate not less than 1.5 m deep below normal ground level, connected with and including galvanised iron strip of size 32 x 6mm connected to main test point as directed as earthing lead by means of nuts, bolts and washers of galvanised iron protected by 40mm dia (medium grade) GI tubing, funnel, wire mesh, 20mm bore GI tubing (light grade) watering pipe, including concrete pit in PCC (1:3:6) type C-1, precast RCC (1:2:4) type B-1 cover slab of size 350 x 350 x 50mm reinforced with 8mm dia TMT bars @ 15cm c/c in both ways and 10mm dia MS handle (01 No) of suitable size for lifting of cover slab, charcoal and salt in alternate layers including necessary excavation and earth work in soft/loose soil all as shown in Electrical plate No 3 of SSR Part-I and testing on completion, complete all as specified and/or as directed by Engr-in-Charge.