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ISOMETER® IRDH275

ISOMETER® IRDH275

- This device series is in the discontinuation phase. -
Available until 31.12.2023.

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  • Features
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  • Insulation monitoring for unearthed AC, AC/DC systems 0…793 V, DC 0…650 V
  • Nominal voltage extendable via coupling device
  • Two separately adjustable response values1 kΩ…10 MΩ
  • AMPPlus measurement method
  • Automatic adaptation to the system leakage capacitance
  • Info button to display device settings and system leakage capacitance
  • Self monitoring with automatic alarm
  • Automatic self test, selectable
  • Connection for external kΩ indication
  • Test and reset button
  • Connection external test/reset button
  • Two separate alarm relays with two voltage-free changeover contacts
  • N/O or N/C operation
  • Backlit LC display
  • RS-485 interface
  • AC, DC or AC/DC main circuits
  • AC/DC main circuits with directly connected DC components, such as rectifiers, converters, and thyristor-controlled DC drives
  • UPS systems, battery systems
  • Heaters with phase control
  • Installations including switch-mode power supplies
  • IT systems including high leakage capacitances
  • Coupled IT systems

 

Optional accessories for ISOMETER® IRDH275

External kΩ measuring instrument 400 µA
TypeArt. No.
7204-1421B986763
9604-1421B986764

External kΩ measuring instrument 20 mA
TypeArt. No.
9620-1421B986841

Coupling devices
TypeNominal system voltage UnArt. No.
AGH150W-4DC 0…1760 VB98018006
AGH204S-4AC 0…1650 (1300) VB914013
AGH520SAC 0…7200 VB913033

Variants of ISOMETER® IRDH275


TypeNominal voltage UnSupply voltage USArt. No.
IRDH275-435AC 0…793 V / DC 0…650 V*AC 88…264 / DC 77…286 V*B91065100
IRDH275-427AC 0…793 V / DC 0…650 V*AC 19.2…55 V / DC 19.2…72 VB91065104
IRDH275-425AC 0…793 V / DC 0…650 V*DC 10.2…36 VB91065108
IRDH275B-435AC 0…793 V / DC 0…650 V*AC 88…264 / DC 77…286 V*B91065101
IRDH275B-427AC 0…793 V / DC 0…650 V*AC 19.2…55 V / DC 19.2…72 VB91065105
IRDH275B-425AC 0…793 V / DC 0…650 V*DC 10.2…36 VB91065109
* Absolute values

Downloads for ISOMETER® IRDH275

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