H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 73/02 (2006.01) H01F 5/02 (2006.01) H01H 71/24 (2006.01) H01H 71/30 (2006.01) H01H 71/74 (2006.01)
Patent
CA 2124517
ABSTRACT The invention relates to a method of fitting an overload coil for a circuit breaker onto a bobbin assembly. The overload coil is pre-formed into a helical coil with a pair of terminals and a coil sub-assembly is formed by attaching electrical leads to the terminals of the coils. Separate base and top halves of a split bobbin are assembled so that the pre-formed coil of the coil sub-assembly is held captive therebetween. A sensing tube is fitted through an aperture extending axially through the assembled split bobbin, and the sensing tube is mounted onto a magnetic cradle. Different top halves, such as a voltage coil top half and a high inrush top half may be fitted into a common base half. The invention extends to a bobbin assembly for a circuit breaker, as well as to an overload coil sub-assembly.
Leet Edward
Ribeiro Manuel Fernando Vidal
Bereskin & Parr
Circuit Breaker Industries Limited
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