Insulation monitoring

Insulation monitoring in the electrical system

System insulation monitoring and safety relays suitable for permanent monitoring of IT electrical lines. Insulation monitoring devices are widely used in electrical panels on mobile generator sets. These devices can monitor the insulation of lines up to 500Vac, and have a potentiometer on the front panel to set the impedance trip threshold. They have an indicator LED (Fault) and a relay that switches in the event of an earth insulation fault.

Main benefits

  • Reliable solid state electronics
  • Simple trip threshold setting on the front panel
  • Small 2 DIN module size
  • Clear door with lead seal

Main features

  • Voltage monitoring up to 500Vac
  • Trip time of 500ms
  • Trip threshold settable from 50k to 300k Ohm
  • Functional Test and system Reset buttons
  • Output with 1 NO-C-NC change-over contact, 12A 250Vac
  • Can monitor three-phase, single-phase and battery systems
Modular isolation monitoring devices

Modular isolation monitoring devices

Isolation monitoring sentinel for LV networks up to 500 Vac; 2 modules; 110–230–400 Vac power supply.