ZW20 Outdoor Vacuum Circuit Breaker
ZW20-12 outdoor vacuum circuit breaker is a user demarcation switch. It is mainly composed of three parts: ZW20-12 vacuum circuit breaker body, fault detection controller, and external voltage transformer. ZW20-12 outdoor high voltage vacuum circuit breaker is a maintenance-free product.
It is a high-quality outdoor high-voltage vacuum circuit breaker. It is the new product of the company’s comprehensive domestic and international on-column switches.
ZW20-12 outdoor vacuum circuit breaker has developed a new product with fault detection. The function, protection control function, and communication function can reliably judge and detect milliamp-level zero-sequence current and phase-to-phase short-circuit fault current in and out of the boundary and realize automatic cutting of single-phase ground fault and phase-to-phase short-circuit fault.
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Features of the outdoor vacuum circuit breaker
ZW20 outdoor vacuum circuit breaker is mainly composed of ZW20PW-12/630 outdoor vacuum circuit breaker and an intelligent controller such as FDR-2 series.
It is installed at the responsibility demarcation point of 10kV overhead distribution line, which can realize line short circuit fault and ground fault. Automatic and fast isolation, communication with CMS-4000 distribution automation management system, real-time monitoring of line status, remote control, telemetry, remote signaling, remote adjustment function, is an ideal intelligent distribution network switchgear. This product is widely used in 10kV overhead power distribution networks with different topologies such as single power supply, dual power supply, and radial characteristics
1.Excellent breaking performance: breaking short-circuit current 20kA for 30 times.
2. Low operating power and high reliability: The newly designed small electric spring mechanism reduces the number of parts and operating power (about 30W) to the lowest level.
3. It has maintenance-free features: the main circuit of the circuit breaker, the secondary components, and the operating mechanism are sealed in SF6 gas (zero gauge pressure), which is not affected by the external environment.
4. Reliable sealing performance: It adopts the mature sealing structure and reliable sealing performance.
5. The unique way of entering and leaving the line: Silicone rubber bushing is adapted to make the insulation distance between the terminals more abundant and the outer insulation characteristics are excellent.
6.Flexible installation method: You can choose to use the pylon or seat installation method according to your needs.
7. Safety in use: explosion-proof devices are installed on the top of the cabinet. Even if unexpected internal faults occur, no hot gas or splashes will leak out.
Item | Unit | Data | ||||
Rated voltage | KV | 12 | ||||
Rated current | A | 630 | ||||
Rated frequency | HZ | 50 | ||||
Rated short-time withstand current (RMS) | KA/4S | 20 | ||||
Rated peak withstand current | KA | 50 | ||||
Rated short-circuit making current (peak) | KA | 50 | ||||
Rated short-circuit breaking current | KA | 20 | ||||
Rated short-circuit breaking current times | Times | 30 | ||||
Rated active load breaking current | A | 630 | ||||
Rated breaking capacity of no-load transformer | KVA | 1250 | ||||
Rated closed loop breaking current of distribution line | A | 630 | ||||
Rated cable charging breaking current | A | 25 | ||||
1min Power frequency withstand voltage | Wet test, to-ground | KV | 30 | |||
Dry test phase-to-phase, to-ground,isolating distance | KV | 42 | ||||
Lightning impulse withstand voltage (peak) | Isolating distance | KV | 85 | |||
Phase-to-phase and to-ground | KV | 75 | ||||
IP code | IP67 | |||||
External insulation creepage distance | > 30mm/Kv | |||||
Rated operating sequence | ON-0.3s-ON/OFF-180s-ON/OFF | |||||
Operating times at rated current | 10000 | |||||
Mechanical operating times | 10000 | |||||
Altitude | m | 2000 | ||||
Max ambient temperature | ℃ | 40 | ||||
Min ambient temperature | ℃ | -40 | ||||
N.W. | kg | 140 |