Insulation monitoring of an electrical heating circuit for a melting furnace and method for monitoring

摘要

The invention relates to an isolation monitor (1) of an electric heating circuit for a melting furnace (3) and a corresponding method, wherein a voltage divider (5) and a voltage monitor of the voltage divider (5) are provided. In the method for monitoring the insulation of a heating circuit (18) of the melting furnace (3), the voltage divider (5) parallel to a power supply (16) for the heating circuit (18) connected, the voltage monitoring (a first measuring device (8) and a second measuring device 9 ), wherein a first measurement signal of the first measuring device (8) and a second measurement signal of the second measuring device (9) in an evaluation device (7) are evaluated.