ISOMETER IR425-D4

• 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.