Kontrola off-line stanu izolacji odbiorników czasowo odłączonych od napięcia

This article describes new method of insulation monitoring for de-energized devices. Many loads such as extinguisher pumps, emergency supply units, slide valve drives, antismoke lids, motors for pumps etc. are switch on only occasionally or works sequentially so during the shut- down periods the insulation faults may cause. Switching the device on may then lead to the tripping of the protective devices, that's why insulation monitoring turn out to be unnecessary.