Product Overview: LW36-72.5KV SF6 Circuit Breaker
LW36-72.5 self-energy outdoor HV AC sulfur hexaluoride circuit breaker is an outdoor three-phase porcelain column electrical equipment mainly used in AC 50Hz or 60Hz, 72.5kV electricity systems in extremely cold regions (for electric stations in general regions and -42℃ extremely cold regions). This product can be operated frequently and used as a connection circuit breaker.
Specifications and Parameters:
| Rated voltage | 72.5kV | ||
| The altitude | ≤3000m | ≤5000m | |
| The environment temperature | -40℃ ～+55℃ | ||
| Pollution level | Ⅳ | ||
| The wind speed | 34m/s | ||
| Earthquake resistant level | AG5 | ||
| Power frequency wihstand voltage,1min | To earth | 204.8kV | |
| Across open breaks | 204.8+53.76*kV | ||
| Rated lighning impulse withstand voltage | To earth | 486.4kV | |
| Across open breaks | 486.4+75.52*kV | ||
| Rated Frequency | 50/60Hz | 50Hz | |
| Rated normal current | 3150/4000A | ||
| Rated short circuit breaking current | 40kA | ||
| Rated short circuit duration time | 4s | ||
| Coefficient of opening pole | 1.5 | ||
| Electrical life | 21times | ||
| SF6 gas pressure (gauge pressure 20℃) | 0.4MPa 50Hz | 0.4MPa | |
| 0.7MPa 60Hz | |||
| Mechanical life | 10000times | ||
Notes: parameler value with "*" is correcled by altitude correction coefficient K: altitude 2000m, K=1.13; altitude 3000m, K=1.28
Product Features:
High performance -strong rated circulating ability: strong short circuit breaking abiity up to 5500A. 50kA
Long service life -electrical endurance: 50kAx21times; mechanical life: 10000 times .
Reliable breaking performance.
Reliable sealing performance; Annual leakage of SF6 gas ≤0.5%
Meeting the requirements of hard running environments -suitable for Class IV polluted environments.
Multi-structure fomms-usually porcelain column type and handcart type.
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