GROUND_FAULT_INTERRUPTER

Published:2009/7/14 23:27:00 Author:Jessie | From:SeekIC

Compares current in ungrounded side of power line with current in neutral conductor. If currents are not equal, ground fault exists because portion of line current is taking an unintended return path through leaky electric appliance or human body. Voltage induced in toroid by unbalanced current is amplified for energizing relay K1 to break circuit. Toroid uses Amidon T-184-41 core, with 600 turns No. 30 for secondary, and 12 turns No. 16 solid twisted-pair for primary. Circuit operates on fault current of 4mA, well below danger limit for children.-W. J, Prudhomme, The Unzapper, 73 Magazine, Nov./ Dec. 1975, p 151-156.



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