ISOMETER® isoPV425 with AGH420

Ground-fault monitoring device for AC and DC IT systems
Application photovoltaic systems up to AC 690 V/DC 1000 V
Automatic adaptation to the system leakage capacitance up to 1000 μF
Measurement of the nominal system voltage (RMS) with undervoltage and overvoltage detection

The ISOMETER® of the isoPV425 series monitors the insulation resistance of unearthed AC/DC main circuits (IT systems) with nominal voltages of 3(N)AC, AC, AC/DC 0…690 V or DC 0…1000 V.

DC components existing in AC/DC systems do not influence the operating characteristics. A separate supply voltage allows deenergised systems to be monitored as well. The maximum permissible system leakage capacitance is 1000 µF.

Questions? Contact us!

Ground-fault monitoring device for AC and DC IT systems
Application photovoltaic systems up to AC 690 V/DC 1000 V
Automatic adaptation to the system leakage capacitance up to 1000 μF
Measurement of the nominal system voltage (RMS) with undervoltage and overvoltage detection

The ISOMETER® of the isoPV425 series monitors the insulation resistance of unearthed AC/DC main circuits (IT systems) with nominal voltages of 3(N)AC, AC, AC/DC 0…690 V or DC 0…1000 V.

DC components existing in AC/DC systems do not influence the operating characteristics. A separate supply voltage allows deenergised systems to be monitored as well. The maximum permissible system leakage capacitance is 1000 µF.

Questions? Contact us!

Features

Monitoring for unearthed AC and DC systems with galvanically connected rectifiers or inverters
Measurement of the nominal system voltage U_n (True RMS) 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 1000 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 1…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 selectable
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

Applications

AC, DC or AC/DC main circuits
Solar systems with directly connected inverters
Solar systems with high system leakage capacitances
Solar systems with high but slow voltage fluctuations
Systems including switched-mode power supplies