main product features:
1. the interrupter of the circuit breaker has a single break design and a simple and reasonable structure with high technology. it meets the requirements of iec 62271-1 and iec 62271-100.
2. strong breaking ability, long contact life (rated number of short-circuit breaking is up to 20 times) and long maintenance period.
3. except for bushing unit which is packaged separately, the interrupter unit, hydraulic operation mechanism, current transformer and other components of the whole-pole circuit breaker are packaged as a whole unit, which does not require on-site docking and adjustment and is convenient for installation.
4. the circuit breaker unit can be directly filled with sf6 gas without opening the interrupter during site installation, thus avoiding the invasion of dust and foreign matters.
main technical parameters:
|
no. |
item |
unit |
data | |
|
1 |
rated voltage |
kv |
550 | |
|
2 |
rated current |
a |
4000 | |
|
3 |
rated frequency |
hz |
50/60 | |
|
4 |
/ time |
ka/s |
50/3 | |
|
5 |
rated peak withstand current |
ka |
125 | |
|
6 |
rated short-duration power-frequency withstand voltage |
phase-to-earth |
kv |
740 |
|
across isolating distance |
kv |
740＋315 | ||
|
rated lightning impulse withstand voltage |
phase-to-earth |
kv |
1675 | |
|
across isolating distance |
kv |
1675 450 | ||
|
rated switching impulse withstand voltage |
phase-to-earth |
kv |
1300 | |
|
across isolating distance |
kv |
1175 450 | ||