De-energized tap-changers are used to adjust the voltage setting of oil transformers. Unlike on-load tap-changers, the adjustment of the desired winding tap must take place with the transformer de-energized.
Large-Distribution Transformers with a maximum rated current of 1500 A and voltage 72,5 kV: this is the target of LDT series, a selection of tap changers that combine robust design with high performances.
| Highest voltage for equipment Um | 24 kV, 36 kV, 52 kV, 72,5 kV | 24 kV, 36 kV, 52 kV, 72,5 kV | 24 kV, 36 kV, 52 kV, 72,5 kV |
| Max. rated through-current | 120 A - 600 A | 120 A - 600 A | 800 A - 1500 A |
| Number of positions | 2 - 9 | 2 - 11 (up to 20 positions for special applications) | 2 - 9 (up to 20 positions for special applications) |
| Connection(s) | bridge, linear, star, series/parallel, star/delta | bridge, linear, star, series/parallel, star/delta | bridge, linear, series/parallel |
| Drive | direct manual drive | direct manual drive, CAPT® MDU DE | direct manual drive, CAPT® MDU DE |
