Universal earth-fault detector - has relay monitoring insulation of unearthed LV networks and amplifier with variable response

摘要

The relay has a measuring circuit displaying the state of insulation to ground and an amplifier part to display and/or open a switch on the input side of the network. The relay has a measurement output with two connections for the measuring circuit. The relay also has an amplifier output with a connection for the amplifier circuit. The three connections are external connection points. The first connection can be connected to the amplifier connection to accommodate different ranges.