ZW20-12 series outdoor high voltage vacuum circuit breaker is an outdoor power distribution equipment with rated voltage of 12kV and three-phase AC of 50/6OHz.lt is mainly used for breaking and closing load current, overload current and short circuit current in power system. lt is suitable for protection and control in substation, rural power grid and distribution system of industrial and mining enterprises.
The main circuit of the product is sealed in the shell with protection grade up to lP67, and SF6 gas is used as the insulation medium, so the insulation performance is highly reliable.
Ambient Temperature: No more than +40℃ and no less than -40'℃. Average temperature is no more than +35℃ within 24 hours.
Altitude: No more than 1000m.
Relative Humidity: the average daily value is no more than 95%, the average monthly value is no more than 90%.
Earthquake intensity: No more than 8 degrees wind pressure: No more than 700Pa.
Vapor pressure: average daily value is no more than 2.2kPa, average monthly value is no more than 1.8kPa.
Installation locations without fire, explosion danger, serious pollution, chemical corrosion and violent vibration.
lt can be hoisted on the pole or installed on the seat, which is flexible and convenient to install.
The main circuit of the circuit breaker is sealed in SF6 gas (zero-gauge pressure) ，which is not affected by external environment, with stable and reliable performance and maintenance free.
Fluid silicone rubber bushing is adopted with excellent external insulation performance.
An explosion-proof device is installed on the top of the box, which can effectively block the escape of objects in case of switch failure, so it is safe and reliable to use.
It can be equipped with a control terminal interface, which is suitable for automatic distribution networks and unattended substations.
| No. | Content | Unit | Value | ||
| 1 | Rated Voltage | kV | 12 | ||
| 2 | Rated Frequency | Hz | 50/60 | ||
| 3 | Rated Insulation level | Power Frequency Withstand voltage in 1 min | kV | 42 | |
| Lightning impulse Withstand voltage (Peak) | 75 | ||||
| 4 | Rated Short-circuit Breaking Current | kA | 20 | 25 | |
| 5 | Rated Current | A | 630 | ||
| 6 | Rated Short-time Withstand Current | kA | 20 | 25 | |
| 7 | Rated Peak withstand Current | 50 | 63 | ||
| 8 | Rated Short Circuit Making Current | 50 | 63 | ||
| 9 | Opening time | ms | 20-50 | ||
| 10 | Closing time | ms | 35-70 | ||
| 11 | Mechanical life | times | 30000/3000(Circuit Breaker/Disconnector) | ||
| 12 | Operation mode | Manual/Electric | |||
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