The de-energized tap changers are used for voltage regulation of oil-immersed transformers within certain limits. The required winding taps must be set with the transformer switched off.
The PBV series of de-energized tap changers is designed for mounting on the active part of the transformer. It includes three main variants - PBV01, PBV02.1, PBV02.2. All are designed, manufactured and tested according to the requirements of the International Standard IEC 60214-1.
| Rated current (A) | 200, 400, 630, 700, 1000 for a single current carrying path |
| Rated voltage (kV) – three phase | 17.5; 24; 41.5; 72.5; 123 and 170 |
| Rated voltage (kV) – single phase | 17.5; 24; 41.5; 72.5; 123; 170 and 245 |
| Rated voltage (kV) – single phase | 170; 245; 300; 362 and 420 for PBV02.2 |
| Number of steps | Up to 15 |
| Number of steps | 5 for PBV02.2 |
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