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Protection circuit for testing electrical equipment - has monitoring unit and switching system with earthed connection at input detector resistance
Protection circuit for testing electrical equipment - has monitoring unit and switching system with earthed connection at input detector resistance
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机译:用于测试电气设备的保护电路-具有监控单元和开关系统,输入输入检测器电阻处接地
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摘要
The safety protection system for electrical equipment being tested, has one pole which carries the operating or measured voltage connected to earth through a detector resistance (D) (RD). This resistance is at the control input of a monitoring unit (US) incorporated in the testing unit, and forms the input to the latter. The monitoring unit is a cut-out switch (AE) operated with a switching characteristic which gives a reduced switch off time as the detector current increases. This characteristic is determined by a capacitor at the input of the monitoring unit.
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