Schneider Electric IMD-IM400C IMD-IM400C Isolation monitor No. of relay outputs: 1

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 the standards, it is recommended to equip your systems with insulation monitoring devices (IMD). This equipment is intended for monitoring large and disturbed AC, DC and ACDC systems, including large photovoltaic applications. It measures the line insulation resistance by feeding a low frequency alternating current between the mains and the ground. The configuration depends on the installation. The settings are made on the front of the device via the HMI screen. The settings refer to the type of network, the alarm and pre-alarm thresholds, the alarm delay from 0 to 7200 seconds, and others are available. It monitors networks up to 830VAC when connected to the neutral wire, 480V when connected to the line and 480VDC, with up to 500Microfarad, up to 5500Microfarad in PV mode with voltage adapter. The black-and-white monitor can display the insulation resistance from 10 ohms to 10 megaohms, the capacity and temporary errors. Autotest starts automatically every 5 hours and if necessary. If the insulation resistance of the system falls below the set threshold value, i.e. if there is a ground fault, an alarm is triggered via the IMD output relay. 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 440VAC source or from a 110VDC to 440VDC source, all with a tolerance of plus or minus 15%. This product is installed flush with the surface, e.g. in a cabinet door, and is properly coated. Front-side protection class is IP5, rear-side protection class IP20 and over-voltage 300V category III. The monitoring device is equipped with an RS485 communication interface with Modbus protocol.

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