ZMM1系列塑料外壳式断路器(以下简称断路器)，是本公司采用国际先进设计、制造技术研制、 开发的新型断路器之一。其额定绝缘电压为800V，适用于交流50Hz，额定工作电压690V及以下，(ZMM1-63为400V),额定工作电流至800A的电路中作不频繁转换及电动机不频繁起动之用。

断路器具有过载、短路和欠电压保护功能，能保护线路和电源设备不受损坏。

The ZMM1 series plastic-enclosed circuit breakers (hereinafter referred to as "circuit breakers") are among the new types of circuit breakers developed by our company using advanced international design and manufacturing technologies. These circuit breakers have a rated insulation voltage of 800 V, are suitable for AC 50 Hz, with a rated operating voltage of 690 V or lower (the ZMM1-63 model corresponds to 400 V), and a rated operating current up to 800 A; they are designed for nonrepeated switching operations and non-repeated motor starting applications in electrical circuits.

Circuit breakers feature overload, short-circuit, and undervoltage protection functions, enabling them to safeguard circuits and power supply equipment from damage.