ISOMETER® isoEV425 with AGH420

ISOMETER® isoEV425 with AGH420

  • Ground-fault monitoring device for AC 690 V and DC 1000 V IT systems
  • Monitoring of DC charging stations for electric and hybrid vehicles
  • Settings in accordance with IEC 61851-23
  • Parameter settings by the customer not required

The ISOMETER® of the isoEV425 series monitors the insulation resistance of ungrounded DC-charging stations for electric vehicles (IT systems) DC 0…1100 V DC from the charging station to the motor (AC 0…793 V). Due to a separate supply voltage de-energized systems can also be monitored.

  • Features
  • Applications
  • Accessories
  • Ordering information
  • Downloads
  • Monitoring for DC charging stations (mode 4 acc. to IEC 61851-23) for charging of electric vehicles
  • Measurement of the mains voltage (r.m.s.) with undervoltage and overvoltage detection
  • Measurement of DC voltages system to earth (L+/PE and L-/PE)
  • Automatic adaptation to the system leakage capacitance up to 5 μF or 20 μF
  • Automatic device self test with connection monitoring
  • Selectable start-up delay, response delay and delay on release
  • Two separately adjustable response value ranges of 1kΩ …500 kΩ (Alarm 1, Alarm 2)
  • Alarm signalling via LEDs (AL1, AL2), a display and alarm relays (K1, K2)
  • N/C operation or N/O operation of the relays selectable
  • Measured value indication via multifunctional 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
  • DC charging stations for electric vehicles according to IEC 61851-23


Optional accessories for ISOMETER® isoEV425 with AGH420

TypeArt. No.
Mounting clip for screw mounting (1 piece per device)B98060008

Variants of ISOMETER® isoEV425 with AGH420

TypeSupply voltage USSystem leakage capacitance CeArt. No.*
isoEV425-D4 with AGH420AC 100…240 V, 47…63 Hz / DC 24…240 V≤ 5 μFB71036401
isoEV425HC-D4 with AGH420AC 100…240 V, 47…63 Hz / DC 24…240 V≤ 20 μFB71036397
*(B7… = push-wire terminal / B9… = screw-type terminal)

Downloads for ISOMETER® isoEV425 with AGH420



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