H.T. Distribution Transformer Manufacturer - Ghaziabad
The range of Electrical Transformers, we manufacture help in meeting the requirements of UPS Inverter, control panel manufacturers & elevator industry.
 
  • Distribution Transformer
  • Installation
  • QUALITY CONTROL & ROUTINE TESTS
  • Basic Technical Data

Product Range:

Power & Distribution Transformers 63 KVA to 5000 KVA in 11 & 33 KV voltage class.

Vector Group :

Transformers will be connected as per vector group reference Dynll. Other vector groups can be offered as per specific requirements.

Terminal Arrangement:

H.V. - Bare Bushings or Cable Box, L.V. - Bare Bushings or Cable Box. Disconnecting chambers can also be provided on both HV and LV Cable boxes.

Temperature Rise:

Arora Electricals transformers are designed for a maximum temperature rise of 50 / 55 degree C of oil winding. Lower temperature rise can be offered on  request.

Core:

The core is constructed from low loss, cold rolled, grain oriented, annealed laminations of electrical sheet steel conforming to the latest international standards. Special frame is built in-house for clamping the core to reduce the magnetic noise as well as making the whole structure rigid and robust.

Windings:

Coils are wound with electrolytic high conductivity paper covered or synthetic enameled copper conductors. Cooling ducts are provided to keep the hot spot temperature as low as possible. Coils are dried in electric ovens. Rigid connection support and coil clamping is provided to ensure high short circuit strength.

Insulation:

Precompressed board PARMALI board and JAPANEASE insulation paper of best quality is used.

Tapping:

A. OFF CIRCUIT TAP CHANGING SWITCH

Tappings from +5% to-5% in steps of 2.5% for HV variation or as per customer's requirement.

B. ON LOAD TAP CHANGER

Tapping range as per specific requirements can be offered. OLTC for remote / auto / parallel operation can also be offered.

OIL:

Oil is tested for resistivity, dielectric and  acidic characteristic  conforming to IEC-296 / IS-335, before topping  up, oil is filtered thoroughly.

TANKS:

The tanks are made of M.S. Steel plates/sheets with adequate bracing & stiffeners. Tanks are pressure tested to withstand any type of inside or outside pressure. All the external surfaces are given a primary coat of zinc chromate, red oxide and two finishing coats of grey paint. The inner surfaces are given a coat of heat and oil resisting paint.

PAINTING:

All the external surfaces are given a primary coat of red oxide and two finishing coats of paint. Paints and enamel varnish used confirm to IS : 104  & 2932.

TERMINAL ARRANGEMENT & BUSHING:

Following arrangements are provided : (a) HV - Bare or cable box bushings (b) L.V. - Bare or cable box bushings, disconnecting chambers can also be provided on both HV&LV cable boxes. Bushing conforms to IS:3347, 2099, HV/LV bushing terminals of brass / copper conformers to IS:3347 Section-II metal part.

GASKETS & JOINTS:

All gaskets used for making oil tight joints to be with cork as base banded by oil resisting synthetic material or rubber.

Neoprene rubber is used for oil tight joints for HV & LV terminals. The gaskets conforms to IS: 4253,

Part-II-1980 (Reaffirmed 1999) NC777, RC 70C.

QUALITY CONTROL & ROUTINE TESTS:

All ARORA ELECTRICALS transformers undergo rigorous quality control checks and are routine tested as per IS in our fully equipped test facilities. Any specific test required by the customer can also be arranged.

Testing Facility:

The process of manufacturing quality transformers is critically dependent on testing of raw materials, semi finished & finished products. We are equipped with state-of-the-art- testing facilities to perform all routine and special tests. Generator for carrying out impulse test, Capacitor Bank for Load Loss Test for higher capacity are also equipped to carry out heat run test on transformers upto. 5 MVA.

For efficient power supply, well engineered and reliable transformers are essential.

ARORA ELECTRICAL’S with its 15 years expertise in transformers has established state-of-the-art technique for distribution and power facility.

Transformers Single phase Distribution Transformers upto 25 KVA designed with protection circuit.

Three phase Distribution Transformers upto 5000 KVA, 11/22/33/66 KV Class.

Basic Technical Data: Losses, Weights & Dimensions of Transformers

Capacity(KVA) No Load Losses Load Losses (Watts) Impedance % Standard Vol. Ratio(KV) Dimension (mm)
Length X X Height
Total Weight(kg.) Remark
10 50 210 4.00 11/0.250 765X710X690 150 Aluminium
16 75 250 4.00 11/0.250 770 X 740 X 650 193 Aluminium
25 100 685 4.50 11/0.433 1025X850X1130 290 Aluminium
63 180 1235 4.50 11/0.433 970X1000X1250 505 Aluminium
100 260 1760 4.50 11/0.433 1080X 1135 X1370 600 Aluminium
160 380 2750 4.50 1 1/0.433 1260 X 1020X1650 840 Aluminium
250 550 3600 4.75 11/0.433 1400 X 1450X1700 1160 Aluminium
315 580 4200 4.75 11/0.433 1450 X 1500 X 1550 1400 Copper
400 680 5200 4.75 11/0.433 1500 X 1600X1600 1570 Copper
500 850 6200 4.75 11/0.433 1570 X 1480X1940 1800 Copper
630 950 7500 4.75 11/0.433 1600X2180X1980 2420 Copper
750 1100 8400 4.75 11/0.433 1720X1780X2060 2650 Copper
1000 1400 12000 5.00 11/0.433 1780X2740X2120 3400 Copper
1250 1650 14000 5.25 11/0.433 1900X2650X2300 3900 Copper
1500 1800 15800 5.75 11/0.433 2050X2800X2400 4500 Copper
2000 2700 18500 6.25 11/0.433 2200X2900X2600 5800 Copper
2500 3200 22000 6.50 11/0.433 2400 X 3000 X 2800 6400 Copper
3000 3800 24500 6.50 11/0.433 2600X3200X2950 7800 Copper
500 1200 7000 5.50 33/0,433 2200X3100X2400 3100 Copper
630 1350 7800 5,50 33/0,433 1600X2050X2500 3650 Copper
1000 1800 10500 5.75 33/0,433 1800X2700X2600 4400 Copper
1250 2000 17000 5.75 33/0,433 2200X2800X2500 4900 Copper
1500 2650 16800 6.00 33/0,433 2050X3200X2700 5650 Copper
2000 3200 19500 6.00 33/0.433 2300X3300X2800 7600 Copper
2500 3800 24000 6.25 33/0.433 2450X3500X3100 8100 Copper
3000 4500 26000 6.50 33/0.433 2600X3600X3200 8700 Copper
1500 2800 16000 6.00 33/11 2150X3100X2400 5900 Copper
2500 3800 21000 6.50 33/11 2250X3200X2600 7200 Off- Load
3000 4500 24000 6.50 33/11 2400X3400X2900 8500 Off -Load
5000 6500 34000 7.15 33/11 2730X3550X3100 12500 Off- Load
6300 7500 43000 7.15 33/11 3800X4600X3400 16000 Off- Load
7500 8200 52000 8.25 33/H 3400X4300X3300 18500 Off- Load

Due to the policy of continuos product upgradation Arora Electrical’s reserves the right to modify design & specifications without notice. Weights & dimensions are to +-5% tolerance.