Outdoor high-voltage intelligent vacuum circuit breake

ZW20-12
The ZW20-12 pole-mounted circuit breaker is an outdoor high-voltage power distribution equipment with a rated voltage of 12kV and a three-phase AC frequency of 50Hz. It adopts a three-phase common-tank layout design, utilizes vacuum arc extinction, and is insulated with zero gauge pressure SF6 gas. The operating mechanism allows for both manual and electric operations, and the enclosure protection level is IP67, ensuring maintenance-free operation under harsh environmental conditions. The circuit breaker can be equipped with either a spring mechanism or a permanent magnet mechanism, and an isolating switch can be added according to user needs.

Product Advantages
Reliable sealing, maintenance-free
The main circuit of the circuit breaker, as well as the secondary components and the operating mechanism, are all sealed in SF6 gas at zero gauge pressure, ensuring high product reliability
Use safely
An explosion-proof device is installed on the top of the box, ensuring that even in the event of an unexpected internal malfunction, there is no risk of explosion
Connector
Adopt high-quality aviation sockets made of stainless steel, with gold-plated pins, ensuring waterproof and airtight performance, and reliable connection
The product can be equipped with a built-in current transformer for protection and measurement purposes
At the same time, a zero-sequence current transformer can be built in to achieve ground fault protection function
Gas-insulated pole-mounted circuit breaker
Especially suitable for use in high-altitude areas
It can be operated both electrically and manually
It can be configured with both local remote control and remote control functions
Application Scenarios
It is suitable for use in the overhead distribution systems of the State Grid and China Southern Power Grid for measurement, protection, and control purposes. It can automatically detect faults, provide protection, trigger alarms, and monitor the operation of the lines. It also features the ability to automatically isolate faults and restore power supply to non-faulty sections
Technical Specifications

Parameter name	Unit	Parameter value
Rated Voltage	KV	12
Rated frequency	HZ	50
Rated insulation level – power frequency withstand voltage – to ground, between phases	KV	42
Rated insulation level – power frequency withstand voltage – fracture	KV	48
Rated insulation level – lightning impulse withstand voltage (peak value) – phase-to-ground	KV	75
Rated insulation level – lightning impulse withstand voltage (peak value) – fracture	KV	85
Rated current	A	630
Rated short-circuit breaking current	KA	20/25
Degree of protection provided by enclosure	–	IP67