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Electric circuit device with a residual current monitoring module for detecting a closed switch contact as well as a protection ground conductor interruption in a one or multiphase electric supply line
Electric circuit device with a residual current monitoring module for detecting a closed switch contact as well as a protection ground conductor interruption in a one or multiphase electric supply line
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机译:具有剩余电流监控模块的电路装置,用于检测闭合开关触点以及一个或多相电源线中的保护接地导体中断
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摘要
An electric circuit device and method is for recognizing a closed switch contact as well as a protective ground conductor interruption in a one- or multiphase electric supply line. A control of a residual current monitoring device (RCMB control) includes one fault current control unit for generating a control signal pattern including a series of switching-on impulses forwarded to a first electronic switch unit to activate a possible artificial passive fault current on one or more active conductors and the protective ground conductor (as a return conductor), this fault current actually flowing, being recognized, and evaluated in a closed circuit in a closed switch contact to be tested and an intact protective conductor. Owing to control signal patterns varying during monitoring, a reliable detection of the artificial passive fault current is ensured even in large dynamic disturbance levels while the electric installation (supply line) to be monitored is in operation.
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