Electronic Circuit Breaker

This product is specifically developed for outdoor applications and adopts a high-strength sealed structure combined with weather-resistant materials, enabling it to operate reliably under complex outdoor conditions such as high temperatures, extreme cold, high humidity, and dust. It features a mechanical life of up to 10,000 operating cycles and is capable of performing 30 short-circuit breaking operations at the rated short-circuit breaking current, fully meeting the requirements of high-frequency operation and ensuring stable, long-term reliability.

• In terms of performance parameters, the circuit breaker offers flexible adaptability. Rated current options of 630 A and 1250 A are available to meet different power distribution requirements. The rated short-circuit breaking current is available at two levels, 20 kA and 25 kA, with corresponding rated peak withstand current and rated short-circuit making current of 50 kA or 63 kA. The rated short-time withstand current is 20 kA for 4 seconds, enabling rapid fault response and circuit interruption to prevent equipment damage and fault escalation.

• The insulation performance strictly complies with high industry standards. The power-frequency withstand voltage (1 minute) is 34 kV under wet conditions, and 42 kV phase-to-phase and phase-to-ground, as well as 48 kV across the contacts, under dry conditions. The lightning impulse withstand voltage (peak) is 75 kV phase-to-phase and phase-to-ground, and 85 kV across the contacts, providing effective resistance to overvoltage surges. In addition, the secondary circuit has a 1-minute power-frequency withstand voltage of 2 kV, further enhancing overall safety protection.

The operating design follows the standard sequence of "Open – 0.3 s – Close–Open – 180 s – Close–Open," ensuring precise operation and rapid response, and facilitating efficient operation and maintenance.

 

This product has a wide range of applications and is suitable for protection and control in substations as well as power distribution systems in industrial and mining enterprises. It is also well suited for environments requiring frequent operation, such as rural power grids. Whether used for upgrading traditional power facilities or constructing new power distribution networks, it plays a core role in supporting the safe, stable, and efficient operation of power systems.