H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/74
H01H 71/24 (2006.01) H01H 73/36 (2006.01) H01H 77/06 (2006.01)
Patent
CA 1194062
ABSTRACT OF THE DISCLOSURE A current-limiting electrical apparatus is pro- vided including a housing with first and second electri- cal terminals contained therein. A pair of electrical contacts is disposed within the housing and electrically connected in series with the first and second terminals. A biasing means applies a biasing force to the pair of electrical contacts to bias them to a closed position. The pair of electrical contacts is configured to cause the contacts to electromagnetically repel each other and to overcome the biasing force and open when the current flowing through the contacts exceeds a predetermined value. A mechanism is provided responsive to the current flowing through the pair of electrical contacts for decreasing the biasing force as the current flowing in the electrical contacts approaches the predetermined value, to thereby decrease the predetermined value caus- ing the electrical contacts to immediately open. The housing is an insulating housing and is designed to con- nect with the insulating housing of a molded case circuit breaker so that the apparatus may be affixed thereto.
425499
Dimarco Bernard
Kralik Andrew J.
Ridout & Maybee Llp
Siemens-Allis Inc.
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