Excellent final voltage distribution transformation

Oil Filled Distribution Transformers with Off Circuit and On Load Tap Changer (up to 5000 KVA33KV Class) conforming to the Indian & international standards of quality and safety. These transformers are designed and developed using latest technologies and can be provided with a variety of terminations so as to suit the requirements for new installation or replacement.

Optimum efficiency is ensured by delicate proportioning of core and winding looses using CRGO M3 to M5 MOH Lamination, Electrolytic Grade 99.9% pure copper, with Transposition in L.V. coil for current sharing in parallel Conductors, Electric grade press paper, boards and mineral oil. Thus better regulation is achieved resulting in longer life. Careful designing also reduces noise level to the minimum.

We, NJA Industries Pvt Ltd - Vadodara, are considered as a leading manufacturer and supplier of best quality Distribution Transformers for our huge clientele base.

Standard Accessories

  • HV off-Circuit Tap Changer or ON Load Tap Changer
  • HV Indoor Cable Box or Outdoor Bushing Terminal
  • Conservator with Plain Oil Level Gauge
  • Skid Base and Bi-Directional Roller
  • HV Indoor Cable Box or Outdoor Bus Duct
  • Oil Drain and Filter Valve
  • Rating and Diagram Plate
  • Thermometer Pocket
  • Breather
  • Earthing Terminals

Special Accessories

  • DGPT relay
  • Air cell bag for conservator
  • Digital OTI and WTI with SCADA output
  • Repid pressure release relay
(Note: Above Accessories Provide as per customer requirement)

Types of Distribution Transformer

Single Phase

These transformers are specially used for networks wherever a three-phase supply is not required. Usually, these are used for repairing overhead distribution loads in residential. These are also applicable in industrial lighting, light commercial loads & power applications.

Three Phase

This kind of transformer is used to hold electrical energy from the main distribution circuit to a minor distribution circuit. This type of transformer transmits the current to a secondary distribution circuit and also reduces the voltage of the primary distribution circuit. These transformers reduce the voltage supply for the primary circuit based on the consumer requirement.

This voltage always changes & can be dissimilar for the users of commercial, residential & light industry. These transformers work on different levels of voltage & frequency based on the standards existing in different countries. These transformers are available in single-phase & three phases. Single-phase is used in residential applications whereas 3-phase with a pad is used in underground primary circuits.


This type of transformer includes a locked steel cupboard that is arranged on a concrete pad. This type of transformer is installed in places where they do not have space for a fenced enclosure. This transformer is used with electric power distribution lines at an overhead electrical line for reducing the primary voltage to supply for the customers. A single transformer of this type can serve many homes/a large building. The power rating of this transformer ranges from 75 kVA to 5000 kVA and includes fixed switches & fuses.

Pole Mounted

These transformers are mounted on an electrical service pole at the height of the overhead cables. These are used for changing high distribution voltage to low like 120/240-volt power. These types of transformers are used in a wide rural area, ranges from 16 kVA to 100kVA. These are available in small size and easy to fit on single-pole structures. These transformers are reliable to harsh climates when they used in remote areas.

Uses / Applications

  • This transformer changes from high voltage electricity to low voltage electricity, used in homes & businesses.
  • The main function of this is to step down the voltage to provide isolation between two windings like primary & secondary.
  • This transformer distributes the power to remote areas which are generated from the power plants.
  • Generally, this transformer distributes the electrical energy to industries with less voltage under 33KV and 440volts to 220volts for domestic purposes.