Pulse generator circuit arrangement and method for generating pulsed signals for insulation fault location in IT networks

摘要

A pulse generator circuit arrangement for the search for insulation faults in IT networks includes a rectifier circuit for transforming an IT network voltage into a DC intermediate circuit and switching elements having a trigger signal input for switching on and off a DC intermediate circuit voltage. A circuit device downstream of the switching elements generates a pulsed current to be supplied to the IT network. The circuit arrangement includes a control and evaluating logic for determining the insulation resistance of the IT network and also a circuit device for generating the pulsed current, which is formed as a current regulating device and allows a dynamic adjustment of the pulsed current depending on the determined insulation resistance.

主权项

1. A pulse generator circuit arrangement for insulation fault location in IT networks, said circuit arrangement comprising:
a rectifier circuit transforming an IT network voltage into a DC intermediate circuit; switching elements having a trigger signal input for switching on and off a voltage of the DC intermediate circuit; a circuit device downstream of the switching elements generating a pulsed current to be supplied to the IT network; control and evaluating logic determining an insulation resistance of the IT network; and said circuit device generating the pulsed current, which is formed as a current regulating device which allows a dynamic adaptive adjustment of the pulsed current depending on the simultaneously determined insulation resistance.