Extra High Voltage (EHV) transformers are specialized power transformers designed to operate at transmission voltages above 132 kV, typically in the range of 400 kV to 1200 kV. They are engineered with advanced insulation systems, robust mechanical strength, and optimized core and winding designs to minimize losses, withstand high fault currents, and resist lightning or switching surges.
The primary purpose of an EHV transformer is to enable bulk power transmission over long distances by stepping down very high transmission voltages to sub‑transmission or distribution levels. This ensures efficient energy transfer, reduced transmission losses, and stable grid operation, making EHV transformers the backbone of modern power networks and essential for inter‑regional power corridors, industrial complexes, and integration of renewable energy into national grids.
Technical Details
- 410MVA,500kV 3 phase
|
Sr. No |
Rating (MVA) |
Voltage (kV) |
No‑Load Loss (kW) |
Load Loss (kW) |
%Z (Impedance) |
HV Impulse (kV) |
|
1 |
410 |
500 |
140 |
800 |
15 |
1550 |
- 315MVA,765kV 1 phase
|
Sr. No |
Rating (MVA) |
Voltage (kV) |
No‑Load Loss (kW) |
Load Loss (kW) |
%Z (Impedance) |
HV Impulse (kV) |
|
1 |
315 |
765 |
100 |
600 |
15 |
1950 |