Manual Outdoor high-voltage vacuum circuit breaker is an outdoor power distribution equipment with a rated voltage of 12kV and 33kV and three-phase AC 50Hz. It is mainly used for the opening and closing of load current, overload current and short-circuit current in the power system. It is suitable for the protection and control of power distribution systems in substations and industrial and mining enterprises, as well as places where rural power grids operate frequently. The circuit breaker has the characteristics of small size, light weight, anti-condensation and maintenance-free. It can adapt to harsh weather conditions and dirty environments.
Circuit breaker can be different from the normal use of the above provisions under the conditions of use, then the user’s requirements with manufacturers to negotiate, and obtain the consensus of opinion.
| No. | Description | Unit | Data | |
| 1 | Rated voltage | kV | 12 and 33 | |
| 2 | Rated frequency | Hz | 50 | |
| 3 | Rated current | A | 630 | 1250 |
| 4 | Rated short circuit breaking current | kA | 20 | 25 |
| 5 | Rated peak withstand current | kA | 50 | 63 |
| 6 | Rated short time withstand current (4s) | kA | 20 | 25 |
| 7 | Rated short circuit making current (peak) | kA | 50 | 63 |
| 8 | Mechanical endurance | times | 10000 | |
| 9 | Rated short circuit breaking current capacity | times | 30 | |
| 10 | Power frequency withstand voltage (1min) Phase to phase/earth, between open contacts |
kV | 42 | |
| 11 | Lightning impulse withstand voltage (peak) | kV | 75 | |
| 12 | Power frequency withstand voltage on secondary circuit (1Â min) | V | 2000 | |
The conditions of use
Ambient air temperature: – 10 ° ºC ~ + 40 ºC
Altitude: not more than 2000 m
The surrounding air can be affected by dust, smoke, corrosive gas, steam, or smoke pollution
Wind speed is less than 34 m/s
Pollution level: 111 level
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