• Insulation monitoring device for AC and DC IT systems
  •  Application control circuits
  •  According to IEC 61557-8
  •  Two separately configurable response values
  •  Multi-functional LC display


The ISOMETER® of the IR425 series is designed to monitor the insulation resistance of un­earthed AC/DC control circuits (IT systems) 0…300 V. DC components existing in AC/DC systems do not influence the operating characteristics. An external supply voltage allows de-energized systems to be monitored too.