Main Breaker A main breaker is a circuit breaker at the input or output of the bus, through which all of the bus power must flow. The generator main breaker is the device, usually mounted on the generator set, that interrupts the genset's power output. Main breakers provide overcurrent protection and a single disconnect point for all power in a switchboard or device.
主开关 主开关是在母排输入或输出端的线路断路器，所有的电流都要从那通过。主开关通常安装在发电机组上，用来切断输出电流。主开关能够提供过电流保护，是配电盘或设备的电源断开点。

Mains Mains is a term used extensively outside of the United States to describe the normal power service (utility).
市电 市电是美国以外的区域对常规电力服务的广泛称谓。

Master Control A control section in a typical paralleling system that provides total system metering and the interface point between the paralleling system and the facility.
主控制 主控制是典型的并联系统计量控制设备，也是并联系统与用电设施之间的接口。

Medium Voltage AC system operating voltages from 601 to 15000 VAC.
中压 交流电系统中从601 到15000 VAC的电压称为中压。

Modbus "专用名词 " An industrial networking system that uses RS-232 serial master-slave communications at data transfer rate of up to 19.2 KBPS.
一种工业网络，它使用RS232主从通讯模式传输数据，最快可达19.2kBPS。

Modules Modules are also called nodes or devices. These are devices such as Genset Communication Modules (GCMs), Control Communication Modules (CCMs), and Digital Input/Output Modules (DIMs).
模块 模块也可以称作接点或组件，例如机组通讯模块(GCMs)、控制通讯模块(CCMs)以及数字输入/输出模块(DIMs)。

Molded Case Circuit Breaker A molded case circuit breaker automatically interrupts the current flowing through it when the current exceeds the trip rating of the breaker. Molded case refers to the use of molded plastic as the medium of electrical insulation for enclosing the mechanisms, and for separating conducting surfaces from one another and from grounded (earthed) metal parts. Molded case circuit breakers usually contain thermal-magnetic trip units, although larger sizes can be equipped with solid state trip sensors.
塑壳断路器 塑壳断路器能够自动切断电流在电流超过跳脱设定后。塑壳指的是用塑料绝缘体来作为装置的外壳，用来隔离导体之间以及接地金属部分。塑壳断路器通常含有热磁跳脱单元，而大型号的塑壳断路器会配备固态跳脱传感器。