Schneider Electric IMD-IM20-H IMD-IM20-H Isolation monitor

This device belongs to the Vigilohm series, which was developed for the monitoring of ungrounded power supplies (IT systems) according to the installation and product standards. According to IEC standards, it is mandatory to provide IT medical rooms with insulation monitoring equipment (IMD). This equipment is intended for monitoring AC, DC, and ACDC systems for medical IT systems. It measures the line insulation resistance by feeding a low frequency alternating current between the mains and the ground. The configuration is performed according to medical standards from the front of the device via the HMI screen. The settings refer to insulation alarm thresholds from 50 to 500 kiloohms, as well as overheating and overload alarms for transformers. It monitors networks up to 230VAC, 230VDC, in medical IT architecture, as well as the medical IT transformer. The black-and-white display can indicate the insulation resistance from 100 ohms to 10 megohms. Autotest starts automatically every 5 hours and if necessary. If the insulation resistance of the system falls below the set threshold, i.e. if there is a ground fault, an alarm is triggered via the IMD output relay within 4 seconds. As soon as no more faults are detected, the alarm is cleared and the alarm relay returns to its normal state. The device can be supplied from a 110VAC to 230VAC source or a 125VDC to 250VDC, all with a tolerance of plus or minus 15%. This product can be mounted on a DIN rail or flush. Front-side protection class is IP52, rear side of IP20 and overvoltage category III. The monitoring device is equipped with an RS485 communication interface with Modbus protocol.

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