The BKW5 series intelligent universal low-voltage circuit breaker is suitable for AC 50Hz/60Hz power distribution networks with rated voltage up to 690V and rated current from 200A to 6300A. It is used to distribute electrical energy and protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding, and other faults. The circuit breaker features intelligent protection functions, precise selective protection, improved power supply reliability, and avoidance of unnecessary power outages. It also has an open communication interface for remote control (four remotes) to meet the requirements of control centers and automation systems. This circuit breaker without an intelligent controller and sensors can be used as an isolator. The circuit breaker conforms to the standards: IEC 60947-1 and GB/T 14048.1 "Low-voltage switchgear and controlgear – Part 1: General" and IEC 60947-2 and GB/T 14048.2 "Low-voltage switchgear and controlgear – Part