The ZW20-12F high-voltage outdoor AC vacuum circuit breaker is primarily designed for a rated voltage of 12kV and AC frequency of 50Hz in three-phase AC power supply systems. This device can provide its own operating power and is equipped with two-phase or three-phase current transformers to detect the working current online, determining the switch’s operating status. It achieves overcurrent protection, timely overcurrent protection, and fastbreaking protection functions. Additional ly, it includes an independent zero-sequence or ABC three-phase composite zerosequence current transformer to detect three-phase zero-sequence components, enabling low-current grounding (i.e., single-phase grounding) protection. When coordinated with FTU terminal, it facilitates human-machine dialogue through GSM, GPRS, etc., enabling remote control and setting functions. Positioned at T-line interfaces, it effectively isolates fault areas within the user domain to protect the normal operation of non-fault lines, serving as a boundary switch (i.e., an electronic power watchdog). It is the preferred equipment for 10kV users.
Ambient condition
Altitude: ≤2000m;
Ambient Air Temperature: -30°C to +40°C;
Ambient air may be polluted by dust, smoke, corrosive gases, steam, or salt mist;
Wind Speed: ≤34m/s (equivalent to 700Pa on the cylindrical surface);
No severe and frequent vibrations;
Pollution Level: Heavy。
