Abstract: The invention relates to a method and to a device for monitoring a protective conductor connection of an electrical supply line, the supply line running between a feeding point and a load-side connection. The invention is based on the generation and inductive feeding of a test current into the protective conductor connection and on the registration of a current flowing in the protective conductor connection.

Abstract: A method and a device are for monitoring a protective ground of an electrical feeder using a monitoring conductor, the feeder extending between a feeding point having a grounding connection and a load-side connection, and a test current injected at the feeding point between the monitoring conductor and the grounding connection. The injected test current has a characteristic temporal progression distinguishable from the currents running on the protective ground, the protective ground current measured at the feeding side and the measured protective ground current evaluated to detect an interruption of the protective ground. The injected test current, which is generated by the active measuring method, has a progression distinguishable from the other currents running on the protective ground. On the other hand, a current measurement takes place selectively on the feeding side in the protective ground to be monitored in conjunction with an evaluation of the measured protective ground current.