Master breaker device for back-up protection against electric shock, has electronic storage and/or amplifier circuit dimensioned so that trigger time for device is larger than specific seconds independent of residual current level

摘要

The device has an electronic storage and/or amplifier circuit (6) operating a working current breaker (8) by an electromagnetic relay independent of mains voltage. The circuit is dimensioned so that trigger time for the device is always larger than specific seconds independent of residual current level. Total switch-off time is always less than 0.5 s for residual currents greater than ten times a value of specified residual current.