| 1 | Supply, installation, testing and commissioning of copper wound step-down distribution transformer, outdoor, floor mounted type, suitable for 11 KV / 433 V, 3 phase, 4 wire, 50 Hz AC system, of capacity 100 KVA , oil immersed, naturally cooled ONAN (Oil Natural Air Natural) type, complete with all standard accessories, fittings and mounting arrangements. The transformer shall conform to latest amendments of IS-1180 (Part-1):2014, BIS certified, and BEE 5-star rated (latest applicable notification). Transformer shall be suitable for outdoor operation under Indian climatic conditions.
The transformer shall have:
HV side: Delta connected
LV side: Star connected with neutral brought out
Vector group: DYN-11
Tapping: Off-load tap changer on HV side with taps of 2.5%, 5%, 7.5% in steps of 2.5%
Cooling: ONAN with radiators/cooling fins
Technical requirements
i. Winding: Electrolytic grade copper
ii. Insulation: As per IS standards
iii. Percentage impedance: As per IS 1180
iv. Losses: As per Energy Efficiency Level-2 / latest BEE norms
v. Temperature rise limits: As per IS 1180
vi. Vector group: DYN-11 mandatory
vii.Neutral brought out and suitable for solid earthing
| 1.00 | Each |
| 2 | Accessories & fittings
i. Cable end box on HV side suitable for 95 sqmm 3 core size XLPE cable.
ii. Cable end box on LV side suitable for 95 sqmm 3.5 Core size XLPE cable with cable glands.
iii. Conservator with oil level indicator (min/max marking).
iv. Silica gel dehydrating breather (first filling included).
v. Cooling radiators / fins.
vi. Explosion vent / pressure relief device (PRD).
vii. Oil temperature indicator (OTI) with maximum reading and reset.
viii. Thermometer pocket.
ix. Oil filling hole with cap.
x. Oil drain valve with sampling facility.
xi. Air release valve.
xii. Earthing terminals: Minimum 2 nos. for body earthing .Minimum 2 nos. for neutral earthing (separate
bushing)
xiii. Lifting lugs and pulling lugs.
xiv. HV bushings with arcing horns.
xv. LV bushings (porcelain/epoxy as per standard).
xvi. Rating plate (as per IS) and terminal marking plate.
xvii. Danger plate and phase indication markings.
xviii. First filling of new, unused, ISI marked transformer oil conforming to IS 335.
Notes:-B24
(i) The drawing of transformer shall be approved by accepting officer on receipt of request from the contractor through GE.
(ii) The transformer shall be tested as per IS for all routine tests in the factory premises and reports will be deposited with purchase voucher.
(iii) Factory inspection and testing of the transformer shall be carried out in the presence of the representative of the Accepting Officer/SEI/IEM, and all associated charges shall be borne by the contractor.B25 | | |
| 3 | Supply, Installation, testing and commissioning of LT feeder piller box outdoor type made out of 3.15 mm thick CRCA sheet and MS angle iron frame with weather proof canopy, mounted on PCC pedestal, cubical type, front and rear side openable, compartment type with hinged door lighting lugs 2 Nos, earthing strips at rear side, bottom detachable gland plate complete with suitable size zinc and passivated nut, bolts spring and washers and locking arrangement for each compartment, provision of air vent, dust and vermin proof, provision of cable alley with 400 Amps rated aluminium bus bar having 1100 Volts grade slaving and internal connection should be provided with aluminium strips of suitable size and to accommodate and including the following MCCBs duly painted with 2 coats powder coating over a coat of anticorrosive red oxide primer should accommodate the following accessories.
Incomer:
200 Amps, 4 pole MCCB, 36 KA 415V Adj. Thermal & Adj. Magnetic Released - 01 No,
Digital Volt meter 0-500V with inbuilt selector switch - 01 No
Digital Amp meter 0-500A with inbuilt selector switch & CT Coils- 01 No
Set of LED type indicating lamps - 03 No Aluminium Bus Bar 300 Amps TPN
Outgoing:
160 Amps, MCCB 4 ,Pole 25KA 415 V,Adj.Thermal Adjustable type - 01 No
100 Amps, MCCB 4 ,Pole 25KA 415 V,Adj.Thermal Adjustable type - 01 No
MCB DP 40 Amps Outgoing -10 Nos
| 1.00 | Each |
| 4 | Supply, Installation, Commissioning and testing of transformer of capacity 160 KVA step down outdoor type Copper Wounded ONAN Cooling 11/0.433 KV (at no load) AC 3 Phase 50 Hz on secondary side double wounded oil immersed naturally all air cooled with external tubes/radiator, delta connected as on primary and star connected with neutral brought on secondary. The maximum temperature rise should not exceed 45 degree centigrade in oil and 50 degree centigrade in HV/LV winding when measured by the resistance method after continuous full load run in ambient temperature the transformer shall confirming to IS 2026, 1997 and comprising of following accessories :-
(a) 01 No cable end box on HV side consisting of with 03 Nos porcelain bushing with bushing rods and nuts washers and cable glands suitable for XLPE cable 3 Core 120 Sqmm including cable joint complete adopter box
(b) 01 No cable end box on LV secondary side consisting of 04 Nos porcelain bushing with bushing rods and nuts washers and cable glands suitable for XLPE cable 3.5 Core 185 Sqmm including cable joint complete adopter box
(c) Oil conservator with filter type drain valve and oil level gauge.
| 1.00 | Each |
| 5 | (d) Dehydrating breather with first filling of dehydrating agent.
(e) Explosive vent.
(f) Thermometer Pocket.
(g) Two earthing terminal on tank body to facilitate fixing of 32x6mm GI Strip.
(h) One No thermometer dial type vapour pressure type having range 0-120 degree centigrade with maximum temperature indicator and re-setting device to maximum temperature including needle of temperature gauge max reading panted terminal.
(j) Rating plate with terminal plate.
(k) Oil drain filter valve.
(l) Oil filling hole on top cover with plug.
(m) Air release valve/plug.
(n) 4 Nos plain solid cast steel detachable rollers.
(o) Extra bushing for neutral out side the cable box providing independent earthing for neutral.
(p) First fill of transformer oil confirming to relevant IS and tested upto 60KV dielectric strength. | | |
