Title :
A new type of differential transformer core for ground fault circuit interrupters
Author :
Finke, Guenter B. ; Ma, Bao-Min
Author_Institution :
Magnetic Metals Corporation, Camden, New Jersey, USA
fDate :
11/1/1981 12:00:00 AM
Abstract :
The magnetic requirements of differential transformers for ground fault circuit interrupters (GFCI) are reviewed. A new method for rounding the hysteresis loop of cores used for GFCI working under pulse conditions is proposed by winding two or more layers of tape coaxially. Cores made by this method yield reliable GFCI operation from -20°C to +80°C.
Keywords :
Circuit breakers; Differential transformers; Magnetic cores; Circuit faults; Current transformers; Interrupters; Magnetic circuits; Magnetic cores; Magnetic flux; Permeability; Protection; Temperature distribution; Transformer cores;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1981.1061482
