The differences and relation between the residual current monitor, residual current operated circuit breaker and residual current operated protective relay were introduced.
介绍了剩余电流监视器与剩余电流断路器、剩余电流继电器的区别和联系。
Because bi metal element in miniature circuit breaker is easily affected by ambient temperature change, the protective characteristic of overload will be changed with ambient temperature change.
由于小型断路器的双金属元件易受环境温度变化的影响，其脱扣特性也将随之改变。
The circuit breaker after getting command from the protective relay, disconnects only the faulted element.
从后得到的保护继电器命令断路器，只有断开故障因素。
The protective relay is a sensing device, which senses the fault, determines its location and then send command to the proper circuit breaker by closing its trip coil.
保护继电器是一个传感装置，感官的过错，确定其位置，然后发送命令关闭其旅行线圈到正确的断路器。
The coordination requirements and test methods of short circuit protective device (SCPD) in standard GB14048.4 are introduced. The selection methods of circuit breaker or fuse as SCPD are described.
介绍GB 14 0 4 8 4中与短路保护装置(SCPD)协调配合的要求和试验方法，叙述SCPD为断路器或熔断器时选配方法。
The coordination requirements and test methods of short circuit protective device (SCPD) in standard GB14048.4 are introduced. The selection methods of circuit breaker or fuse as SCPD are described.
介绍GB 14 0 4 8 4中与短路保护装置(SCPD)协调配合的要求和试验方法，叙述SCPD为断路器或熔断器时选配方法。
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