Isolation Guard

Isolation Guard: ISO1-500-50
The isolation guard ISO1-500-50 monitors the isolation resistance of unearthed AC systems up to 800 V AC or 1000 V DC. Isolation faults in DC circuits which are directly connected to the AC system can only be rectified correctly when the load current is between >5-10 mA. Hence, these devices are capable of being integrated into converter systems.


  • Supply voltage: 12-84 VDC
  • Nominal voltage range: 0-1000 VDC
  • Response value: 50 kOhm
  • Internal resistance: 200 kOhm
  • Ambient operating temperature: -25 to +70 ° C
  • Weight: 0.95 kg
  • IP protection: IP65
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