Bender ISOMETER isoPV with AGH-PV

The ISOMETER® of the isoPV series is designed to monitor the insulation resistance of unearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…1100 V. Solar systems containing inverters and isolating transformers are often designed as IT systems. iso-PV variants using theAMPPlus measurement method capable of adapting to slow voltage fluctuations meet the particular requirements of modern solar systems. Due to wide spatial distribution or EMC interference suppression methods often high leakage capacitances against earth occur in these systems. Considering this, the isoPV automatically adapts to the system conditions in order to optimise the measuring time. In particular, the requirements for permissible voltage ranges along with a low level of insulation can be met here.


  • AC, DC or AC/DC main circuits
  • Solar systems with directly connected inverters
  • Solar systems with high system leakage capacitances of up to 2000 µF
  • Solar systems with high but slow voltage fluctuations
  • Systems including switched-mode power supplies
  • Coupled IT systems


  • Insulation monitoring for unearthed systems AC, AC / DC 0…793 V, DC 0…1100 V
  • Two separately adjustable response values 0.2 kΩ…100 kΩ
  • Various AMPPlus measurement methods selectable
  • Automatic adaptation to the system leakage capacitance
  • Info button to display device settings and the system leakage capacitance
  • Self monitoring with automatic alarm
  • Automatic self test, selectable
  • Connection for external kΩ indication
  • Test and reset button
  • External test/reset button can be connected
  • Two separate alarm relays with two potential-free changeover contacts
  • N/O or N/C operation, selectable
  • Backlit LC display
  • RS-485 interface
  • Presetting for PV systems via menu



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