AC/DC insulation monitor ISOMETER® isoPV425

DCRS485Modbus RTU

Insulation 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. Features Monitoring for unearthed AC and DC systems with galvanically connected rectifiers or inverters Measurement of the nominal system voltage Un (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