Three Phase Distribution Transformers

Distribution transformers are normally located at a service drop, wires run from a utility pole or underground power lines to a customer's premises. They are often used for the power supply of facilities outside settlements, such as isolated houses, farmyards or pumping stations at voltages below 30kV.

UTTAM make three phase distribution transformers are available in stack core / wound core upto 160kVA and stack core upto 3000kVA. They are made available in aluminium / copper as per requirement. On demand higher rating can also be offered.

Features
Technical Specification
Standard Technical Data
Fittings
Photo Gallery

»	Available in Stack core
»	Available in Wound core as well as Stack core
»	Modern manufacturing techniques ensuring quality of product
»	Robust build designed to withstand electric impulses, thermal and dynamic stress
»	Designs through Computer Aided Design (CAD) Software System
»	Trouble free performance
»	Customized design and specification demands

Ratings	CRGO - Upto 3000 kVA (higher rating can also be offered) Amorphous â€“ upto 160kVA
Applicable Standards	IS, REC, CBIP, IEC, ANSI, JIS, BS etc.
Cooling	ON AN
Insulating Fluid	Mineral Oil to specification
Frequency	50 Hz, 60 Hz
Primary voltage	Upto 33 kV
Secondary Voltage	415, 433 V (Other Voltages as required)
Winding material	Copper (upto 3000 kVA) / Aluminium (upto 800 kVA)
Taping range	Â± 5% in steps of 2.5% (Other tapings as required)

Overview

Standard Technical Data for Aluminium Wound (Normal Losses)
Standard Technical Data for Copper Wound (Normal Losses)
Standard Technical Data for Aluminium Wound (Low Loss as per CBIP)
Standard Technical Data for Copper Wound (Low Loss as per CBIP)

Sheet 1: Standard Technical Data for Aluminium Wound (Normal Losses)


Rated Primary Voltage : 11 KV (AL)				Rated Secondary Voltage : 0.4, 0.415, 0.433 KV ISS
Rating (In KVA)	Taps (%)	Losses (in Watts)		Imp (%)	Temp Rise (ºC)	Dimensions (in mm)			Total Weight (In Kg)	Terminal Arrangement
		(Subject to I S Tolerance)
		No Load	Load			L	B	H		HT	LT
100	Â± 2.5 % & Â± 5%	310	2350	4.50	50 / 55				715	Cable box	Cable box
125	Â± 2.5 % & Â± 5%	400	2650	4.50	50 / 55				820	Cable box	Cable box
210	Â± 2.5 % & Â± 5%	535	4150	4.50	50 / 55				1125	Cable box	Cable box
250	Â± 2.5 % & Â± 5%	600	4800	4.50	50/ 55				1235	Cable box	Cable box
315	Â± 2.5 % & Â± 5%	750	5400	4.50	50-/ 55				1385	Cable box	Cable box
400	Â± 2.5 % & Â± 5%	870	6900	4.50	50 / 55				1665	Cable box	Cable box
500	Â± 2.5 % & Â± 5%	1100	7300	4.50	50 / 55				1945	Cable box	Cable box

Sheet 2 : Standard Technical Data for Copper Wound (Normal Losses)


Rated Primary Voltage : 11 (CU) KV				Rated Secondary Voltage : 0.4, 0.415, 0.433 KV
Rating (In KVA)	Taps (%)	Losses (in Watts)		Imp (%)	Temp Rise (ºC)	Dimensions (in mm)			Total Weight (In Kg)	Terminal Arrangement
		(Subject to I S Tolerance)
		No Load	Load			L	B	H		H V	L V
250	Â± 2.5 % & Â± 5%	560	4000	4.50	50 / 55	1400	1440	1530	1170	Cable box	Cable box
315	Â± 2.5 % & Â± 5%	650	5000	4.50	50 / 55	1460	1650	1540	1360	Cable box	Cable box
400	Â± 2.5 % & Â± 5%	770	5850	4.50	50 / 55	1630	1570	1660	1585	Cable box	Cable box
500	Â± 2.5 % & Â± 5%	950	6850	4.50	50 / 55	1700	1680	1720	1850	Cable box	Cable box
630	Â± 2.5 % & Â± 5%	1150	7700	4.50	50 / 55	1780	1880	1740	2125	Cable box	Cable box
750	Â± 2.5 % & Â± 5%	1300	9500	5.0	50 / 55	2100	2150	2080	2755	Cable box	Cable box
1000	Â± 2.5 % & Â± 5%	1600	12200	5.0	50 / 55	2260	2290	2340	3185	Cable box	Cable box
1250	Â± 2.5 % & Â± 5%	2100	13500	5.0	50 / 55	2390	2320	2400	4035	Cable box	Cable box
1500	Â± 2.5 % & Â± 5%	2250	16300	6.25	50 / 55	2480	2700	2430	4780	Cable box	Cable box
1600	Â± 2.5 % & Â± 5%	2450	17000	6.25	50 / 55	2530	2860	2520	5090	Cable box	CaBus Duct / Cable boxble box
2000	Â± 2.5 % & Â± 5%	2800	21500	6.25	50 / 55	2580	3080	2650	5855	Cable box	Bus Duct / Cable box
2500	Â± 2.5 % & Â± 5%	3250	27000	6.25	50 / 55	2640	3290	2790	6660	Cable box	Bus Duct / Cable box
3000	Â± 2.5 % & Â± 5%	3750	30000	6.25	50 / 55	2720	3010	2940	7835	Cable box	Bus Duct / Cable box
1. The above quoted electrical performance data are subject to standard tolerances, including losses.
2. Weight, Quantity & Dimension figures are approximate & subject to ±10% tolerance.

Sheet 3 : Standard Technical Data for Aluminium Wound
(Low Loss as per CBIP)


Rated Primary Voltage : 11 KV (AL) - CBIP					Rated Secondary Voltage : 0.4, 0.415, 0.433 KV
Rating (In KVA)	Taps (%)	Losses (in Watts)		Imp (%)	Temp Rise (ºC)	Dimensions (in mm)			Total Weight (In Kg)	Terminal Arrangement

		No Load	Load			L	B	H		HT	LT
250	Â± 2.5 % & Â± 5%	530	2850	4.5	40 / 50				1520	Cable box	Cable box
315	Â± 2.5 % & Â± 5%	650	3500	4.5	40 / 50				1830	Cable box	Cable box
400	Â± 2.5 % & Â± 5%	750	4200	4.5	40 / 50				2190	Cable box	Cable box
500	Â± 2.5 % & Â± 5%	900	5000	4.5	40 / 50				2445	Cable box	Cable box
630	Â± 2.5 % & Â± 5%	1030	5800	4.5	40 / 50				2860	Cable box	Cable box
800	Â± 2.5 % & Â± 5%	1200	8000	5.0	40 / 50				4070	Cable box	Cable box

Sheet 4 : Standard Technical Data for Copper Wound (Low Loss as per CBIP)


Rated Primary Voltage : 11 KV (CU) - CBIP					Rated Secondary Voltage : 0.4, 0.415, 0.433 KV
Rating (In KVA)	Taps (%)	Losses (in Watts)		Imp (%)	Temp Rise (ºC)	Dimensions (in mm)			Total Weight (In Kg)	Terminal Arrangement

		No Load	Load			L	B	H		HT	LT
250	Â± 2.5 % & Â± 5%	530	2850	4.50	40 / 50				1520	Cable box	Cable box
315	Â± 2.5 % & Â± 5%	650	3500	4.50	40 / 50				1685	Cable box	Cable box
400	Â± 2.5 % & Â± 5%	750	4200	4.50	40 / 50				1900	Cable box	Cable box
500	Â± 2.5 % & Â± 5%	900	5000	4.50	40 / 50				2220	Cable box	Cable box
630	Â± 2.5 % & Â± 5%	1030	5800	4.50	40 / 50				2665	Cable box	Cable box
800	Â± 2.5 % & Â± 5%	1200	8000	5.0	5.0				3525	Cable box	Cable box
1000	Â± 2.5 % & Â± 5%	1400	10400	5.0	40 / 50				4120	Cable box	Cable box
1250	Â± 2.5 % & Â± 5%	1635	11730	5.5	40 / 50				4975	Cable box	Cable box
1600	Â± 2.5 % & Â± 5%	2000	14000	6.25	40 / 50				5825	Cable box	Bus Duct / Cable box
2000	Â± 2.5 % & Â± 5%	2300	19000	6.25	40 / 50				6785	Cable box	Bus Duct / Cable box

1. The above quoted electrical performance data are subject to standard tolerance, except losses, which are maximum guaranteed without any positive tolerance.
2. Weight, Quantity & Dimension figures are approximate & subject to ±10% tolerance.
3. Data for higher ratings can be made available at request

Standard Fittings
1	Tanks Base Channels / With Rollers
2	Lifting Lugs
3	Drain Valve
4	LV Cable Box / Bus Duct
5	Tank grounding Provision
6	Rating and Diagram Plate
7	Silica-gel Breather
8	Filter Valve
9	Conservator
10	Primary Bushings
11	Arcing Horns (As Applicable)
12	Secondary Bushings
13	Marshalling Box (As Applicable)
14	Oil Level Indicator
15	Arcing Horns
16	Off Circuit Tap Changer/ On Load Tap Changer/ with Remote Type Changing Control & Automatic Voltage Regulator

Optional Fittings
1	HV cable box
2	Oil Temperature Indicator (with Alarm and Trip contacts)
3	Winding Temperature Indicator (with Alarm and Trip contacts)
4	Buchholz Relay (for ratings above 1000 KVA) (with Alarm and Trip contacts)
5	Magnetic Oil Level Gauge (with Alarm contacts)
6	Neutral CT
7	Pressure Relief Device / Explosion Vent (with Alarm contacts)

Three Phase Distribution Transformer Photo Gallery