以下为句子列表：
英文: A circuit breaker is a protective device that automatically interrupts the current flowing through it when that current exceeds a certain value for a specified period of time.
中文: 线路断路器线路断路器是一个保护装置，当通过它的电流超过某个安全设定值一定时间后，它就能够自动切断电流。
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英文: A differential relay is a protective device that is fed by current transformers located at two different series points in the electrical system.
中文: 差动继电器作为保护装置，差动继电器由位于系统中两个不同位置的电流互感器提供反馈信息。
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英文: Abstract: A safety monitor and protective device of hoist in local coal mine is introduced.It can indicate the movement and the position of the hoist vessel in the shaft directly,send out a signal slowing down the vessel in time.When the vessel is over-ro
中文: 文摘:本文介绍了一种地方煤矿提升绞车安全监测与保护装置，能直观地指示提升容器的运动及在井筒中的位置，设置了比较完善的电器保护系统，能及时发出减速信号，当发生过卷时能自动紧急停车。
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英文: Abstract: The operating principle and the use of residual current protective device is introduced,and its selection, installation and limi tation are commented.
中文: 文摘:介绍了剩余电流动作保护器的工作原理及其用途，叙述了剩余电流动作保护器的选型、安装及其局限性。
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英文: Circuit Breaker A circuit breaker is a protective device that automatically interrupts the current flowing through it when that current exceeds a certain value for a specified period of time.
中文: 线路断路器线路断路器是一个保护装置，当通过它的电流超过某个安全设定值一定时间后，它就能够自动切断电流。
更详细...
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