The device HIS 220V DC/N, TU 4220-004-79740390-2009 is designed for continuous automatic control of insulation resistance of positive and negative busbar of 220 V DC networks with insulated neutral (IT-network) relative to the busbar PE. Visual control of decrease of insulation resistance below the set value is carried out by means of indicators. For remote monitoring, the HIS 220V DC/N is additionally equipped with a switching dry contact for remote signalling.
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