Product overview
Main technical parameters：
number | Parameter name | Unit | Technical date |
1 | Rated voltage | kV | 3.6~24 |
2 | Rated current | A | 6.3~500 |
3 | Rated pre-expected short-circuit breaking current | kA | 20-120 |
4 | Current limit coefficient = cut-off current / the peak Value of Pre-expected Fault Current | % | 15~50 |
5 | Insulation level | Power frequency withstand voltage | kV/1min | 42/48 |
Lightning impulse withstand voltage | kV | 75/85kV |
Product features and advantages：
◆Breaking speed is fast (High speed): Total breaking duration:<10ms
◆The breaking process has obvious current limiting characteristics (Current limiting)
◆It is mainly used for small rated current systems.
◆Non-standard cabinet types are assembled according to the engineering requirements. There are various configuration schemes.
◆The cost of replacing a large number of switches and other main equipment in a transformer substation is reduced.
Product Usage：
◆The rapid short circuit protection of auxiliary branch buses in hydropower plants, limit and quick break the high-amplitude short circuit current, avoids using the expensive generator circuit breakers, improves technical economy.
◆Outlet of large synchronous motor
◆It is used for quick disconnection of the feeders prone to short circuit fault and quick isolation of the fault points.