ARM1E series electronic plastic case circuit breakers (hereinafter referred to as circuit breakers) are suitable for infrequent switching and infrequent starting of motors in circuits with AC 50HZ, rated insulation voltage of 1000V, rated working voltage of 400V and rated working current of 1250A.

The circuit breaker has overload long-delay inverse time limit, short-circuit short-delay inverse time limit, short-circuit short-delay fixed time limit, short-circuit instantaneous and undervoltage protection functions as well as residual current protection (optional) phase failure protection function (optional), which can protect the line and power supply equipment from damage, the circuit breaker has complete and precise protection characteristics, which can improve the reliability of power supply and avoid unnecessary power outages, of which "Z, B "type control with communication interface, can be "four remote" to meet the requirements of the control center and automation system.

According to its rated limit short-circuit breaking capacity, the circuit breaker is divided into L type (standard type), M type (higher breaking type) and H type (high breaking type). The circuit breaker has the characteristics of small size, high breaking capacity, short flying arc and vibration resistance. 

The circuit breaker can be installed vertically (i.e., vertical installation), or horizontally (i.e., horizontal installation), and can be installed lying flat.

Circuit breaker with isolation function, the corresponding symbol: "The circuit breaker can not be inverted into the line, that is, only allow 1, 3, 5 connected to the power line 2, 4, 6 connected to the load line.