The ISOMETER® iso685 is an insulation monitoring device in accordance with IEC 61557-8 for IT systems (unearthed systems). The device is universally applicable in AC, 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads (such as rectifiers, inverters, variablespeed drives).

Insulation monitoring devices continuously monitor the insulation resistance of IT systems (unearthed systems) and issue an alarm if the value falls below a response value.

To obtain a measurement, the device has to be connected between the IT system and the protective earth conductor (PE). A measuring current is superimposed onto the system which is detected and evaluated by a measuring circuit. Insulation monitoring devices detect deteriorations of the insulation level at an early stage and in a reliable way.

Special features of the ISOMETER® iso685:

1. Predefined measurement profiles
2. Reliable measurement of insulation resistance, voltage, capacitance and frequency
3. Integrated web server
4. Modbus TCP/RTU interface
5. History memory

More information about this product: https://www.bender.de/en/products/insulation-monitoring/isometer-iso685/