H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 33/18 (2006.01) H01H 71/50 (2006.01) H01H 73/18 (2006.01) H01H 77/10 (2006.01)
Patent
CA 2097810
2097810 9308585 PCTABS00021 A molded plastic current limiting circuit breaker having for each pole, a stationary contact (28) and movable contact (26) separable upon occurrence of a current higher than a predetermined level. The stationary and movable contacts are positioned inside an over-molded magnet opening to greatly increase the magnetic repulsion force between them and rapidly accelerate their separation by concentrating the magnetic fields generated upon an occurrence of a high level short circuit. The over-molded magnet (34) is composed of a plurality of steel plates grouped together and being over-molded with a thermoplastic material. The thermoplastic material has grooves integrally formed therein for retaining insulator inserts (37, 39) that protect the thermoplastic material during separation of the stationary and movable contacts.
Le disjoncteur de limitation de courant en plastique moulé possède, pour chaque pôle, un contact fixe (28) et un contact mobile (26) pouvant se séparer en présence d'un courant d'une intensité supérieure à un niveau prédéterminé. Les contacts fixe et mobile sont positionnés à l'intérieur d'une ouverture d'un aimant surmoulé afin d'augmenter considérablement la force de répulsion magnétique entre les contacts et d'accélérer rapidement leur séparation en concentrant les champs magnétiques générés lors d'un court-circuit de forte intensité. L'aimant surmoulé (34) se compose de plusieurs plaques en acier groupées les unes aux autres et surmoulées avec un matériau thermoplastique. Le matériau thermoplastique présente des rainures formées dans la masse qui retiennent des inserts isolateurs (37, 39) destinés à protéger le matériau thermoplastique lors de la séparation des contacts fixe et mobile.
Buehler Steven H.
Diekman Christopher M.
Faber Timothy R.
Netolicky Charles E.
Fetherstonhaugh & Co.
Square D. Company
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