Bender ISOMETER isoPV425 - Function; Device Characteristics

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isoPV425_D00028_09_M_XXEN/05.2018
3. Function
3.1 Device characteristics
 Monitoring for unearthed AC and DC systems with galvanically con-
nected rectifiers or inverters
 Measurement of the nominal system voltage U
n
(True RMS) with und-
ervoltage and overvoltage detection
 Measurement of residual voltages system to earth (L+/PE and L-/PE)
 Automatic adaptation to the system leakage capacitance C
e
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 1kΩ …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 of the relays 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