US 7,515,025 B2
Current trip unit for circuit breaker
Jacek Mrowiec, Slaskie (Poland); Dominik Banaszcyzyk, Slaskie (Poland); and Pawel Lazarczyk, Slaskie (Poland)
Assigned to General Electric Company, Schenectady, N.Y. (US)
Filed on Dec. 20, 2006, as Appl. No. 11/642,172.
Prior Publication US 2008/0150661 A1, Jun. 26, 2008
Int. Cl. H01H 9/20 (2006.01); H01H 9/00 (2006.01)
U.S. Cl. 335—167  [335/172] 10 Claims
OG exemplary drawing
 
1. A trip unit, comprising:
a current-carrying element;
an anchor having an up and a down position;
an oscillator having a first position and a second position, wherein when said oscillator is in said first position said anchor is permitted to move into said down position, and when said oscillator is in said second position said anchor is blocked from moving into said down position;
a first magnetic yoke surrounding said current-carrying element and said anchor, wherein a first magnetic flux flowing through said first magnetic yoke moves said anchor into said down position; and
a second magnetic yoke surrounding said current-carrying element and said oscillator, wherein a second magnetic flux flowing through said second magnetic yoke moves said oscillator into said first position, or into said second position.