Three-phase system insulation monitor ISOMETER® isoNAV685-D series

for AC networksAC/DCDC

• Instantaneous tripping 150 ms • Inverter disconnection • Modbus TCP • Tripping on shift voltage The ISOMETER® isoNAV685-D is an insulation monitoring device for IT systems in accordance with IEC 61557-8. It is applicable for use in 3(N)AC systems with nominal system frequency 60 Hz. Features • ISOMETER® for IT AC systems with galvanically connected rectifiers or inverters and for IT DC systems (IT = unearthed systems) • Automatic adaptation to the existing system leakage capacitance • Combination of AMPPLUS and other profile-dependent measurement methods • An adjustable response value for insulation monitoring in the range of 1 kΩ…10 MΩ (factory setting = 5 kΩ) and a response value of 150 V for the DC offset voltage • High-resolution graphic LC display for excellent readability and recording of the device status • Connection monitoring (monitoring of the measuring lines) • Automatic device self test • Graphical representation of the insulation resistance over time (isoGraph) • History memory with real-time clock (buffer for three days) for storing 1023 alarm messages with date and time • Current or voltage output 0(4)…20 mA, 0…400 μA, 0…10 V, 2…10 V (galvanically separated) which is analogous to the measured insulation value of the system • Freely programmable digital inputs and outputs • Remote setting via the Internet or Intranet (Webserver/Option: COMTRAXX® gateway) • Worldwide remote diagnosis via the Internet (made available by Bender Service only) • BCOM, Modbus TCP and web server Applications • AC/DC main circuits with directly connected DC components, such as rectifiers, converters, variable-speed drives • Systems including switch-mode power supplies