ISOMETER® isoHV425 with AGH422

Continuous insulation monitoring at a nominal system voltage of AC/DC 0 V … 1000 V
Galvanically separated interface allows predictive maintenance of the system being monitored
Measurement of nominal system voltages and partial voltages to earth
Automatic adjustment to the system leakage capacitance up to 150 µF
Indication of the insulation value distribution (conductors L1/+ and L2/-) in DC systems

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 … 1000 V or DC 0 …1000 V. The maximum permissible system leakage capacitance Ce is 150 μF. DC components existing in AC systems do not influence the operating characteristics, when a minimum load current of DC 100 mA flows. A separate supply voltage allows de-energised systems to be monitored too.

In order to meet the requirements of applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the area of application indicated in the technical specifications. Any use other than that described in this manual is regarded as improper.

Questions? Contact us!

Continuous insulation monitoring at a nominal system voltage of AC/DC 0 V … 1000 V
Galvanically separated interface allows predictive maintenance of the system being monitored
Measurement of nominal system voltages and partial voltages to earth
Automatic adjustment to the system leakage capacitance up to 150 µF
Indication of the insulation value distribution (conductors L1/+ and L2/-) in DC systems

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 … 1000 V or DC 0 …1000 V. The maximum permissible system leakage capacitance Ce is 150 μF. DC components existing in AC systems do not influence the operating characteristics, when a minimum load current of DC 100 mA flows. A separate supply voltage allows de-energised systems to be monitored too.

In order to meet the requirements of applicable standards, customised parameter settings must be made on the equipment in order to adapt it to local equipment and operating conditions. Please heed the limits of the area of application indicated in the technical specifications. Any use other than that described in this manual is regarded as improper.

Questions? Contact us!

Features

Monitoring the insulation resistance for unearthed AC/DC systems
Measurement of the mains voltage (true r.m.s.) with undervoltage and overvoltage detection
Measurement of DC system voltages to earth (L1+/PE and L2-/PE)
Automatic adaptation to the system leakage capacitance up to 150 μF
Selectable start-up delay, response delay and delay on release
Two separately adjustable response value ranges of 10...500 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 a multifunctional LC display
Fault memory can be activated
Password protection to prevent unauthorised parameter changes

isoHV425-D4-4

RS-485 (galvanically separated) including the following protocols:
– BMS interface (Bender measuring device interface) for data exchange with other Bender components
– Modbus RTU
– IsoData (for continuous data output)

isoHV425-D4M-4

0…10 V analogue output (galvanically separated)

Applications

AC main circuits up to 1000 V
DC main circuits up to 1000 V
Systems including switched-mode power supplies