Earthing Transformers

Neutral Earthing transformers

are normally provided in 3-phase system, which is without neutral and earth fault protection. Neutral earthing transformer is having zig - zag (interstar) winding to achieve the required zero phase impedance. In addition an auxiliary winding can also be provided to meet the requirement of auxiliary power supply. ONAN / ONAF cooling with conventional pressed steel radiators. The range includes up to 33 KV systems and as per the site requirements.

A Earthing ( zigzag) transformer is a special purpose transformer with a zigzag or 'interconnected star' winding connection, such that each output is the vector sum of two phases offset by 120?. Its applications are for the creation of a missing neutral connection from an un-grounded, 3-phase system to permit the grounding of that neutral to an earth reference pointand also harmonic mitigation, as it can suppress triplet (3rd, 9th, 15th, 21st, etc.) harmonic currents, to supply 3-phase power as an autotransformer (serving as the primary and secondary with no isolated circuits), and to supply non-standard phase-shifted 3-phase power.

Nine-winding three-phase transformers, typically have 3 primaries and six identical secondary windings which be used in zigzag winding connection as pictured. As with the conventional delta or wye winding configuration three-phase transformer, a standard stand-alone transformer containing only six windings on three cores can also be used in zigzag winding connection, such transformer sometimes being referred to as a zigzag bank. In all cases, six or nine winding, the first coil on each zigzag winding core is connected contrariwise to the second coil on the next core. The second coils are then all tied together to form the neutral and the phases are connected to the primary coils. Each phase, therefore, couples with each other phase and the voltages cancel out. As such, there would be negligible current through the neutral point, which can be tied to ground.
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Distribution Transformers

Industrial, Substation & Distribution Tfr. Upto 10 MVA, Upto 33kV, ONAN A poly phase Distribution Transformers

Earthing Transformers

Industrial, Substation & Distribution Tfr. Upto 10 MVA, Upto 33kV, ONAN A poly phase Distribution Transformers

Power Transformers

A Power transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction.

Compact Sub Station

The CSS are designed, manufactured, fully assembled, wired and operationally tested in our workshops, therefore site works are minimal.

Reactor Transformers

A Power transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction.

Dry (CRT) Transformers

In cast-resin dry-type transformers, the complete encapsulation of primary and secondary winding in epoxy resin prevents penetration of moisture into windings, good protection against adverse ambient conditions.

About Company

URJA is managed by a group of technocrats having vast and varied experience in transformer design, development, production, quality control and servicing. Its modern manufacturing plant with state-of-the-art manufacturing and testing facilities as per IS, IEC & ANSI standards, accredited to ISO-9001:2008, 14001:2004, 18001:2007 by Moody International, believing in producing excellent quality products to its customers. URJA’s strength lays in good marketing network, stable customer relationship and commitment to the highest levels of service and excellence. Renowned for its flexibility in repair of many different types and brands of transformers URJA has completed a multitude of contract for repairs. URJA’s “e-con.tek Transformers” having Low Loss and High Efficiency designs incorporates more copper, resulting into “less power consumption


Product Range

Power up to 10 MVA -33 kV.
Distribution up to 5 MVA – 33 kV, Furnace up to 5 MVA – 33 kV,
Rectifier up to 10 KA DC – 33 kV, Reactor up to 2 MVA – 33 kV ,
Earthing up to 2 MVA – 33 kV, Converter Duty up to 5 MVA – 33 kV,
Dry (VPI) up to 2 MVA – 11 kV. – with OLTC also.

Quality Control

Management System which meets the requirements of firstly ISO 9001:2008, 14001:2004, 18001:2007; Secondly DUN & BRADSTREET Certification. (D-U-N Number 85-836-3382). To establish objectives at all functions and levels and shall review these objectives and take appropriate corrective and preventive actions.