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  • Isolatiebewakingsapparaat voor mobiele generatoren
  • Beschermende isolatie als veiligheidsvoorziening met isolatiebewaking en uitschakeling
  • In overeenstemming met EN 60364-5-551; DIN VDE 0100-551; NEN1010-551 en DIN EN 61557-8
  • Twee responswaarden (fabrieksinstellingen 46 kΩ, 23 kΩ)

The ISOMETER® monitors the insulation resistance of unearthed AC, AC/DC and DC systems (IT systems) with nominal system voltages of 3(N)AC, AC/DC 0…400 V or DC 0…400 V.

The maximum permissible system leakage capacitance Ce is 5 μF. DC components existing in AC systems do not influence the operating characteristics, when a minimum load current of DC 10 mA flows. A separate supply voltage allows de-energised systems to be monitored, too.


  • Monitoring the insulation resistance for unearthed AC/DC systems
  • Measurement of the system voltage (true r.m.s.) with undervoltage and overvoltage detection
  • Measurement of DC system voltages to earth (L1+/PE and L2-/PE)
  • Two operating modes: GEn and DC
  • Automatic adaptation to the system leakage capacitance up to 5 μF
  • Selectable start-up delay, response delay and delay on release
  • Two separately adjustable response value ranges of 5…200 kΩ (Alarm 1, Alarm 2)
  • Alarm signalling via LEDs (AL1, AL2), a display and alarm relays (K1, K2)
  • Automatic device self test with connection monitoring
  • Selectable N/C or N/O relay operation
  • Measured value indication via multi-functional LCD
  • Fault memory can be activated
  • RS-485 (galvanically isolated) including the following protocols:
    - BMS interface (Bender measuring device interface) for data exchange with other Bender components
    - Modbus RTU
    - IsoData (for continuous data output)
  • Password protection to prevent unauthorised parameter changes


  • AC main circuits up to 400 V
  • DC main circuits up to 400 V
  • Generators according to DIN VDE 0100-551

ISOMETER® isoGEN423 Variant(en)

TypeVersionArt. No.
isoGEN423-D4-4Push-wire terminalB71036325
isoGEN423-D4W-4Push-wire terminalB71036325W

Optionele accessoires voor ISOMETER® isoGEN423

TypeArt. No.
Mounting clip for screw mounting (one piece per device)B98060008
Mounting frame XM420B990994 

Downloads voor ISOMETER® isoGEN423

CE Conformiteitsverklaringen isoXX425 151.9 KB 2023/01/09 06:50:5109.01.2023 06:50:51
Handboeken isoGEN423 2.4 MB DE2021/04/20 08:07:4720.04.2021 08:07:47D00221
Beknopte handleidingen isoGEN423 899.0 KB DE2021/03/18 13:27:2518.03.2021 13:27:25D00221
Beknopte handleidingen isoGEN423 899.0 KB EN2021/03/18 13:27:2518.03.2021 13:27:25D00221
Gegevensbladen isoGEN423 388.8 KB DE2022/06/09 10:53:5609.06.2022 10:53:56D00221
Handboeken isoGEN423 2.4 MB EN2021/04/20 08:09:2720.04.2021 08:09:27D00221
Gegevensbladen isoGEN423 385.5 KB EN2022/06/09 10:54:3709.06.2022 10:54:37D00221
Gegevensbladen isoGEN423 388.6 KB FR2022/06/09 10:55:1509.06.2022 10:55:15D00221
Gegevensbladen isoGEN423 389.0 KB ES2022/06/09 10:55:5109.06.2022 10:55:51D00221