isoGEN423 D4-4 Isometer

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. The DC-fed components present in AC systems have no influence on the response behavior if at least a load current of DC 10 mA flows. The separate supply voltage also makes it possible to monitor a de-energized system.

Main features:

- Insulation monitoring device for mobile generators

- Protective separation with insulation monitoring and disconnection

- In accordance with DIN VDE 0100-551 and DIN EN 61557-8

- Two response values (factory setting 46 kΩ, 23 kΩ)

Features and functions:

- Monitoring of the insulation resistance for unearthed AC/DC systems

- Measurement of the mains voltage (true r.m.s) with under/overvoltage detection

- Measurement of DC voltages mains to earth (L1+/PE and L2-/PE)

- Two operating modes: GEn and DC

- Automatic adaptation to the mains leakage capacitance up to 5 μF

- Start-up, response and release delay adjustable

- Two separately adjustable response value ranges from 5...200 kΩ (alarm 1, alarm 2)

- Alarms are output via LEDs (AL1, AL2), a display and alarm relays (K1, K2)

- Automatic device self-test with connection monitoring

- Quiescent or operating current behavior of the relays selectable

- Measured value display via multifunctional LC display

- Fault memory can be activated

- RS-485 (galvanically isolated) with 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 against unauthorized changes to parameters

Applications:

- AC main circuits up to 400 V

- DC main circuits up to 400 V

- Generators according to standard DIN VDE 0100-551