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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 1Energy Efficiency Level 2Energy Efficiency Level 3Energy Efficiency Level 4Energy Efficiency Level 5
50 % Load100% Load50 % Load100% Load50 % Load100% Load50 % Load100% Load50 % Load100% Load
12504.592529309202700864248881122937612113
23154.5102531009552750890244082921647721920
34004.5122534501150333010803214101331029512994
45004.51510430014304100135439091282372712153554
56304.51860530017454850163744381536406114413717
68005.02287640321475838201553231892485317764425
710005.02790770026207000246063642310578521705259
812505.03300920032208400314276703066700329916394
916006.2542001180039701130037531082135471036333539924
1020006.25505015000479014100454313254430912459408811711
1125006.25615018500590017500566016554543015659520914813