Arrangement with a line outlet connected to an electrical power supply network via a circuit breaker with at least one consumer and with an undervoltage protection arrangement

摘要

The circuit is used to couple at least one load (7) to the supply network, with the under-voltage protection (12) coupled to the network tap-off via a voltage transformer (8) and a current transformer (3) inserted between the power switch (2) and the load. A signal is provided by the over-voltage protection when the voltage at the output of the voltage transformer is less than a given voltage threshold value, a second signal provided when the current at the current transformer is higher than a given current threshold value, with an energising signal supplied upon simultaneous reception of both signals.