LIFESAVER

Published:2009/7/21 10:55:00 Author:Jessie | From:SeekIC

Used with transformerless line-operated equipment to minimize possibility of chassis being hot. Relays are so arranged that they automatically search for proper relationship of voltages between hot, neutral and ground terminals before power is applied to equipment. Only limitation is failure to protect against rare fault in which both neutral and conduit ground are at line potential with respect to earth ground.-R. E. Pafenberg, Lifesaver Circuit, EEE, 10:7, p 26-27.



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