HKKM1 Moulded-case Circuit Breaker Series is suitable for circuitries of AC 50/60Hz, rated insulation voltage up to 800V (HKKM1-63 is 500V), rated working voltage of 400/690V (HKKM1-63 is 400V) and rated working current up to 1250A, used for infrequent changeover as well as motor’s infrequent startup (I≤630A and below). It has protective functions against overload, short circuit or under voltage, protects the circuitries and power equipment from being damaged.

HKKM1L Residual Current Operated Moulded-case Circuit Breaker Series protects the human being from indirect contact, also protects from any potential fire hazard caused by long existing ground fault which can not be detected by over-current protector. When other protective devices are out of order, this residual current circuit breaker whose rated residual operated current is 30mA will play a role of additional protector directly.

HKKM1E Electronic Moulded-case Circuit Breaker Series has functions of overload long delay inverse time lag, short-circuit short delay inverse time lag, short-circuit short delay definite time lag, short-circuit instantaneous and under-voltage protection functions, as well as residual current protection (optional) and open-phase protection (optional) functions. It protects the circuitries and power equipment from being damaged, enjoys complete and accurate protection functions that improve reliability of power supply, preventing from unexpected power failure. The controller with communication interface also can realize“four-remote operation” that meets the requirements of the control center and automation system.

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