Vacuum Circuit Breaker
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 12 kV and three-phase AC 50 Hz. It is primarily used for interrupting and closing load currents, overload currents, and short-circuit currents in power systems. It is suitable for protection and control in substations, industrial and mining enterprise distribution systems, and in rural areas where power grids are frequently operated. This circuit breaker features a compact size, light weight, condensation resistance, and is maintenance-free, making it suitable for use in harsh climates and polluted environments.
Manufacturer data — model designation, technical parameters, dimensions and installation details.
GB1984 "AC high voltage circuit breaker";
GB11022 "Common Technical Requirements for High-voltage Switchgear and Controlgear Standards";
GB311.1-6 "Insulation Coordination of High-voltage Transmission and Transformation Equipment";
GB763 "Heat generation of AC high-voltage electrical appliances during long-term operation";
GB2706 "Test methods for dynamic and thermal stability of AC high-voltage electrical appliances";
GB3309 "Mechanical tests for high-voltage switchgear at room temperature";
DL/T593 "Common Technical Conditions for Ordering High-voltage Switchgear".
| Project | 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 | 次 | 10000 |
| Rated short-circuit breaking current breaking times | 次 | 30 |
| Power frequency withstand voltage (1min): (wet) (dry) phase to phase, to ground/break | KV | 42/48 |
| Lightning impulse withstand voltage (peak) between phases, to ground/break | KV | 75/85 |
| Secondary circuit 1min power frequency withstand voltage | KV | 2 |
