ISOMETER® IRDH275BM-7 with AGH675S-7…

  • Insulation monitoring device for AC and DC IT systems
  • Application for drives including medium voltage converters up to 15.5 kV
  • In combination with AGH675S-7 and AGH675S- MV15
  • History memory with real-time clock for storing alarm messages with date and time
  • Galvanically isolated RS-485 interface for data exchange

The device combination ISOMETER® IRDH275BM-7 and the coupling device AGH675S-7 or the coupling devices AGH675S-7MV15 is designed to monitor the insulation resistance of unearthed medium voltage systems (IT systems). It is suitable for universal use in 3AC, combined AC/DC and DC systems. AC systems may include extensive DC-supplied loads. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. Taking the system leakage capacitances into account, the IRDH275BM-7 automatically adapts itself to the existing system conditions in order to optimise the measuring time.

Questions? Contact us!

ISOMETER® IRDH275BM-7
ISOMETER® IRDH275BM-7
  • Insulation monitoring device for AC and DC IT systems
  • Application for drives including medium voltage converters up to 15.5 kV
  • In combination with AGH675S-7 and AGH675S- MV15
  • History memory with real-time clock for storing alarm messages with date and time
  • Galvanically isolated RS-485 interface for data exchange

The device combination ISOMETER® IRDH275BM-7 and the coupling device AGH675S-7 or the coupling devices AGH675S-7MV15 is designed to monitor the insulation resistance of unearthed medium voltage systems (IT systems). It is suitable for universal use in 3AC, combined AC/DC and DC systems. AC systems may include extensive DC-supplied loads. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. Taking the system leakage capacitances into account, the IRDH275BM-7 automatically adapts itself to the existing system conditions in order to optimise the measuring time.

Questions? Contact us!

Features

  • Insulation monitoring for drives including medium voltage converters up to 15.5 kV
  • Two separately adjustable response values 100 kΩ…10 MΩ
  • AMPPlus measurement method (European patent: EP 0 654 673 B1)
  • Automatic adaptation to the system leakage capacitance
  • Info button to display device settings and the system leakage capacitance
  • History memory with real-time clock to store alarm messages with date and time stamp
  • BMS interface (Bender Measuring Device Interface) for communication with other Bender devices (RS-485 electrically isolated)
  • Current output 0(4)…20mA (electrically isolated) analogously to the measured insulation value
  • Self monitoring with automatic alarm
  • Automatic self test, selectable
  • Connection for external kΩ indication
  • Test and reset button
  • Connection external test and reset button
  • Two separate alarm relays with two potential-free changeover contacts
  • N/O or N/C operation, selectable
  • Backlit two-line plain text display
  • Remote setting of specific parameters via Internet (option; COM465IP with at least Option C required)

Applications

  • AC, DC or AC/DC medium voltage systems
  • AC/DC medium voltage systems with directly connected DC components, such as rectifiers, converters, and thyristor-controlled DC drives

ISOMETER® IRDH275BM-7 with AGH675S-7… Variant(s)

TypeNominal voltage UnSupply voltage USCable lengthArt. No.
IRDH275BM-7--AC 19.2…55 V / DC 19.2…72 V--B91065120
AGH675S-7-2000AC/DC 0…7.2 kV, 0…460 Hz--2000 mmB913061
AGH675S-7-500AC/DC 0…7.2 kV, 0…460 Hz--500 mmB913060
AGH675S-7MV15-500AC/DC 0…15.5 kV, 0…460 Hz--500 mmB913058

Optional Accessories for ISOMETER® IRDH275BM-7 with AGH675S-7…

External kΩ measuring instruments (20 mA)

TypeSKMP *2Art. No.
9620-17212,8 MΩB986849

Downloads for ISOMETER® IRDH275BM-7 with AGH675S-7…

NameCategorySizeLanguageTimestampD-/B-Number
UKCA - AGH Declarations of Conformity 122.7 KB 2023/11/2222.11.2023
AGH CE Declarations of conformity 143.8 KB 2023/11/2222.11.2023
IRDH275 - 375 - 575 CE Declarations of conformity 95.3 KB 2024/02/0707.02.2024
IRDH275BM-7 Manuals 2.9 MB DE2020/09/1111.09.2020D00123
IRDH275BM-7 Manuals 2.9 MB EN2020/09/1111.09.2020D00123
IRDH275BM-7 mit AGH675S-7... Datasheets 409.6 KB DE2019/09/1010.09.2019D00123
IRDH275BM-7 with AGH675S-7... Datasheets 363.1 KB EN2019/10/0101.10.2019D00123
IRDH275BM-7 con AGH675S-7... Datasheets 361.7 KB ES2019/09/1010.09.2019D00123
IRDH275BM-7 Datasheets 514.8 KB ZH2019/05/1313.05.2019D00123
IRDH275BM-7 Quickstarts 889.3 KB DE2021/03/0202.03.2021D00123
IRDH275BM-7 Quickstarts 889.3 KB EN2021/03/0202.03.2021D00123