Overview
The ZW32-12 outdoor vacuum circuit breaker (hereinafter referred to as the circuit breaker) is an outdoor power distribution device with a rated voltage of 12kV and three-phase AC 50Hz. It is mainly used for breaking and closing load current, overload current, and short-circuit current in power systems. It is suitable for protection and control in substations and power distribution systems of industrial and mining enterprises, as well as for locations with frequent operations in rural power grids.
This circuit breaker features small size, light weight, anti-condensation, and maintenance-free characteristics, and can adapt to harsh climatic conditions and polluted environments.
Main Technical Parameters
| Item | Unit | Parameter |
| Rated voltage | kV | 12 |
| Rated frequency | Hz | 50 |
| Rated current | A | 630 |
| Rated short-circuit breaking current | kA | 20 |
| Rated peak withstand current (peak) | kA | 50 |
| Rated short-time withstand current | kA | 20 |
| Rated short-circuit making current (peak) | kA | 50 |
| Mechanical life | times | 10000 |
| Number of breaking operations at rated short-circuit breaking current | times | 30 |
| Power-frequency withstand voltage (1min): (wet)/(dry) phase-to-phase, phase-to-ground/break | kV | 42/48 |
| Lightning impulse withstand voltage (peak) phase-to-phase, phase-to-ground/break | kV | 75/85 |
| Secondary circuit 1min power-frequency withstand voltage | kV | 2 |
