ISOMETER® iso1685P

ISOMETER® iso1685P

  • Insulation monitoring device for AC 1000 V and DC 1500 V IT systems
  • Application main circuits with connected frequency converters
  • Separately adjustable response values 200 Ω…1 MΩ
  • Display and control function for EDS insulation fault location systems
  • Can be extended to operate as an insulation fault location system

The iso1685P is used for insulation monitoring of extensive systems

up to AC 1000 V/DC 1500 V which are designed as IT systems. The device

uses a specially developed measurement method for monitoring the

insulation resistance also in extensive installations where extremely

high leakage capacitances against earth exist due to interference

suppression methods. Adaptation to systems containing high leakage

capacitances occurs automatically.

The device generates locating current pulses required for insulation

fault location. That allows the localisation of the insulation fault

using permanently installed or mobile insulation fault locators.

  • Features
  • Applications
  • Ordering information
  • Downloads
  • Insulation monitoring in extensive unearthed power supply systems up to AC 1000 V/DC 1500 V
  • Measurement of low-resistance insulation faults
  • Separately adjustable response values Ran1 (Alarm 1) and Ran2 (Alarm 2) (both 200 Ω…1 MΩ) for prewarning and alarm
  • Automatic adaptation to high system leakage capacitances up to 2000 μF, selectable range
  • Integrated locating current injector up to 50 mA
  • Device self test with automatic fault message in the event of a fault
  • Alarm relays separately adjustable for insulation fault 1, insulation fault 2 and device error
  • RS-485 interface (BMS bus), e.g. to control insulation fault location
  • μSD card with data logger and history memory for alarms
  • Extensive systems up to AC 1000 V/DC 1500 V which are designed as IT systems


Variants of ISOMETER® iso1685P

TypeResponse value rangeNominal system voltageSupply voltage*Art. No.
iso1685P-425200 Ω…1 MΩAC 0…1000 V
DC 0…1500 V
DC 18…30 VB91065801
iso1685P-425W200 Ω…1 MΩAC 0…1000 V
DC 0…1500 V
DC 18…30 VB91065801W
* Absolute values

Downloads for ISOMETER® iso1685P



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