Microprocessor controlled air circuit breaker for low voltage main distribution system. CT sampling detects current and phase signals, hardware and software protection logic realizes overload, short delay, instantaneous short circuit, earth fault and reverse power protection. It supports motorized closing, spring charge status monitoring, encoder position feedback and redundant network communication for SCADA and DSC load management.

Certification: CE, IECEx

Main contact assembly, arc extinguishing chamber, CT group, Micrologic trip board, spring operating mechanism, motor charge unit and status LED. Common faults include contact overheating, spring mechanism stuck, trip unit false alarm and communication interruption.