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+91 95 12 55 82 82 info@rppltransformers.com Rajkot, Gujarat
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info@rppltransformers.com
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+91 95 12 55 82 82
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Distribution Transformer

Distribution Transformer

RAJKOT POWERTRANS PRIVATE LIMITED (RPPL) is one of the leading Distribution Transformers Manufacturers in Rajkot, Gujarat. Consider the fact that various Spaces demand varying electrical loads. But with the help of distribution transformers, it is simple to meet all of these needs for electrical power transmission. Distribution Transformers come in a range of types, including single-phase, three-phase, and pad-mounted models. These transformers are set up where they are needed, depending on the location.

  • Ratings: 250kVA to 2500kVA.
  • Primary Voltage: 33000/22000/11000/6600/6900.
  • Secondary Voltage: 433/415/400.
  • Tap Range: Off Circuit or On-Load tap changers for HV/LV variation as per customers specification.
  • Built to customer specifications in accordance with IS 1180 Part-1 Energy Efficiency Standards.

Standard Accessories And Features

  • DPC copper.
  • CRGO core./ Amorphous Core.
  • Pressure relief device.
  • HV & LV Bushings.
  • Grounding Bracket.
  • Conservator Tank.
  • Insulation material.
  • Power oil.

Optional Accessories And Features

Transformers may be provided with the following optional items if specified by the purchaser.

  • Surge arrester mounting provision.
  • Clamp type low voltage terminals.
  • Stud type or spade type low voltage bushings.
  • OTI/WTI indicator.
  • Buchholz relay.
  • High voltage of circuit taps.
  • Cable Box.
  • Additional tests may be requested by the purchaser and shall be performed.
  • Purchaser specified impedance limits.
  • A non resettable device that detects internal transformer faults, incorporates pressure relief, and provides an external indication visible from the ground.
  • Alternative protection devices, specified by the purchaser.
  • Purchaser specified maximum mass.

Standard Distribution Transformer Tests

  • Winding Resistance Measurements.
  • Ratio and Polarity Measurements.
  • Exciting Current and No Load Losses
  • Impedance and Load Losses Measurements.
  • AC Dielectric Test.
  • Induced Voltage Test.
  • Core Ground Test.
  • Oil BDV Test.
  • Magnetic Balance Test.
  • Insulation Resistance Test.
  • Vector Group Test.

Optional Distribution Transformer Tests

  • Temperature Rise.
  • Sound Level.
  • Radio Influence Voltage.
  • Partial Discharges (Corona).
  • Basic Insulation Impulse Level.
  • SFRA Test.
  • Short circuit Test.

Certificate

Some Valuable Information on Distribution Transformers

Distribution Transformers are used to reduce the high voltage to a low voltage level, that is suitable for distribution lines. It ensures that the voltage level is dropped to a safe level for the end user to use it. Distribution Transformers are used in the Transmission and supply of electricity to houses, industries, and commercial spaces. Distribution Transformers are an essential part of an electrical system because they are used to control voltage and manage alternating currents while transmitting electrical energy. 

 

Distribution Transformers are usually used for the distribution of power in Residential and industrial areas. Generally, Distribution transformers include three Standards. IS 1180 Part-1, IS 2026 and IEC 60076. 

 

Distribution Transformer can also be categorized in other parameters like OFF Load Type (OCTC/OCKT) and ON Load (OLTC). Where OFF Load is used where there is very low voltage fluctuation from the grid (11kV/22kV/33kV) then you can use OFF Load Type Transformers. If there is a very high Voltage Fluctuation from the Grid (11kV/22kV/33kV) then you should go for ON Load (OLTC). ON Load Tap Changer can Change Voltage during the loading condition of your Factory/Plant. Where the OFF Load Transformer Can Not Change Voltage during loading conditions you must shut down your plant and then you can change voltage. The ON Load Transformer can automatically change the voltage that you have set in the relay between ranges. If you are using an ON Load Tap changer then you should regularly check the counter of the tap changer. This counter shows how many times the transformer changed the tap. It is recommended that If counters show a reading more than 5000 then you should contact a Technical Service person for more information.

 

The government has Specified ratings for which transformers are used for Distribution purposes up to 2500kVA. Due to major applications in the Distribution Transformer, there is a need to reduce losses of Distribution Transformer. So the Government has Declared a Chart for Losses which is as below. So we can Conserve Energy to Preserve the Future which is our slogan also. Whenever you buy a transformer then you should be very calculative for losses of the transformer. If your transformer’s Efficiency is very good or Losses are less then you can conserve energy and save money also.

Sl No. Rating (kVA) Impedance (Percent)

Maximum Total Losses up to 11kV Class Transformers Amendment 4: IS 1180 (PART 1): 2014
Energy Efficiency Level 1 Energy Efficiency Level 2 Energy Efficiency Level 3 Energy Efficiency Level 4 Energy Efficiency Level 5
50 % Load 100% Load 50 % Load 100% Load 50 % Load 100% Load 50 % Load 100% Load 50 % Load 100% Load
1 250 4.5 925 2930 920 2700 864 2488 811 2293 761 2113
2 315 4.5 1025 3100 955 2750 890 2440 829 2164 772 1920
3 400 4.5 1225 3450 1150 3330 1080 3214 1013 3102 951 2994
4 500 4.5 1510 4300 1430 4100 1354 3909 1282 3727 1215 3554
5 630 4.5 1860 5300 1745 4850 1637 4438 1536 4061 1441 3717
6 800 5.0 2287 6403 2147 5838 2015 5323 1892 4853 1776 4425
7 1000 5.0 2790 7700 2620 7000 2460 6364 2310 5785 2170 5259
8 1250 5.0 3300 9200 3220 8400 3142 7670 3066 7003 2991 6394
9 1600 6.25 4200 11800 3970 11300 3753 10821 3547 10363 3353 9924
10 2000 6.25 5050 15000 4790 14100 4543 13254 4309 12459 4088 11711
11 2500 6.25 6150 18500 5900 17500 5660 16554 5430 15659 5209 14813