AC network insulation monitor ISOMETER® IR1575

AC/DCDCwith insulation fault location

Insulation monitoring device for AC and DC IT systems Application main circuits According to IEC 61557-8 Two separately configurable response values Multi-functional LC display The ISOMETER® of the IR1575 series monitor the insulation resistance of unearthed main circuits (IT systems) AC, 3(N)AC 0…480 V resp. DC 0… 480 V. The AMP measurement method allows the Isometers to be used in systems with directly connected DC components. Taking the system leakage capacitances into account, the IR1575 automatically adapts itself to the existing system conditions in order to optimise the measuring time. An external supply voltage allows de-energised systems to be monitored too. Please note that the frequency range of the IR1575 is limited to DC, 30…420 Hz. For use in systems containing variable-speed drives, we recommend to use the iso685 version. Features Insulation monitoring for unearthed AC, AC/DC systems 0…480 V and DC systems 0…480 V Two separately adjustable response values 2 kΩ…1 MΩ AMP measurement method Automatic adaptation to the system leakage capacitance Injection of the locating current required for selective insulation fault location (only IR1575PG1) LEDs: Alarm 1/Alarm 2 Fault memory behaviour, selectable Connection monitoring system/earth Test and reset button Connection external test and reset button Two separate alarm relays with one changeover contact each N/O or N/C operation, selectable Backlit LC display Self monitoring with automatic alarm Plug-in terminals Enclosure for door mounting 96 x 96 mm