The ZW20A-12 outdoor pole-mounted high-voltage vacuum circuit breaker is an outdoor high-voltage switchgear with a rated voltage of 12KV and a three-phase AC 50HZ. It is mainly used to break and close the load current, overload current and short-circuit current of the power system. It is suitable for protection and control in substations, industrial and mining enterprises, and urban and rural distribution networks. It is especially suitable for places with frequent operations and urban automated distribution networks. This product is matched with the controller to meet the requirements of the distribution automation system and can reliably and effectively complete the traditional recloser function. It adopts a mature box-type sealing structure and is filled with SF6 gas inside. It has good sealing performance and is not affected by the external environment. It is a maintenance-free product. Its spring operating mechanism adopts a direct-acting chain main drive and a multi-stage tripping system, which has high action reliability and is a good product of the circuit breaker.
Description
The ZW20A-12 outdoor pole-mounted high-voltage vacuum circuit breaker is an outdoor high-voltage switchgear with a rated voltage of 12KV and a three-phase AC 50HZ. It is mainly used to break and close the load current, overload current and short-circuit current of the power system. It is suitable for protection and control in substations, industrial and mining enterprises, and urban and rural distribution networks. It is especially suitable for places with frequent operations and urban automated distribution networks. This product is matched with the controller to meet the requirements of the distribution automation system and can reliably and effectively complete the traditional recloser function. It adopts a mature box-type sealing structure and is filled with SF6 gas inside. It has good sealing performance and is not affected by the external environment. It is a maintenance-free product. Its spring operating mechanism adopts a direct-acting chain main drive and a multi-stage tripping system, which has high action reliability and is a good product of the circuit breaker.
Product Feature
Specification Chart
| Item | Unit | Data |
| Rated voltage | kV | 12/24 |
| Rated power frequency | Hz | 50 |
| Rated current | kA | 630/1000 |
| Rated short-circuit breaking current | kA | 12.5、16、20、25 |
| Rated withstand currentpeak) | kA | 31.5、40、50、63 |
| Rated short-time withstand current(4s) | kA | 12.5、16、20、25 |
| Rated short-circuit making current(peak) | kA | 31.5、40、50、63 |
| Mechanical life | times | 10000 |
| Rated short-circuit breaking time | times | 30 |
| 1 min power frequency withstand voltage ( between poles, to earth/across the terminals) | kV | 40/49/60 |
| Lightning impulse withstand voltage ( between poles, to earth/across the terminals) | kV | 75/85/125 |
| Secondary circuit 1min power frequency withstand voltage | kV | 2 |
| Weight | kg | 140 |
| SF6 rated gage pressure | Mpa | “0“” |
Application
Vacuum circuit breakers are widely used in power supply systems. In places such as power transmission and distribution, substations, industrial and mining enterprises, vacuum circuit breakers are often used to control and protect the normal operation of circuits. Vacuum circuit breakers have high short-circuit capabilities and sensitive protection functions that can quickly cut off fault current and protect the safe operation of power grid equipment and power facilities. At the same time, the vacuum circuit breaker can also be used as a segmented control device in the power system to realize segmented power supply to the power system and improve the reliability and flexibility of the system.
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