Electrical device such as a network protector relay with...

H - Electricity – 01 – H

Patent

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H01H 45/04 (2006.01) H05K 5/06 (2006.01)

Patent

CA 2215442

An electrical device such as a network protector relay is protected from ambient conditions by a housing having a printed circuit board (PCB) providing a seal for the housing and air and water tight connections between relay leads and external leads. The relay leads are soldered in first plated through apertures in the PCBsubstrate while the external leads are soldered in second plated through apertures connected to corresponding first apertures by conductive traces on the substrate. Potting material confined by a potting dam electrically insulates the solder connections on the external side of the PCB. Components can be mounted on either side of thesubstrate by soldering the component pins or leads in additinal plated through apertures electrically connected to relay and/or external leads by the conductive traces. Components such as connectors or indicators, including, for example, light emitting diodes, can be supported in the potting dam and connected to appropriate ones of the external leads insulated by the potting material.

Appareil électrique, tel un relais de protection de réseau, protégé de l'environnement grâce à un boîtier muni d'une carte à circuit imprimé (CCI), qui agit comme matériau de scellement du boîtier et dont les connexions entre les fils de connexion et les broches de raccordement sont hermétiques et étanches. Les fils de liaison sont soudés dans des premiers trous métallisés pratiqués dans le substrat de la CCI, tandis que les broches de raccordement sont soudées dans des deuxièmes trous métallisés reliés aux premiers trous correspondants par les tracés sur le substrat. Un produit d'enrobage, maintenu par un dispositif de retenue, isole les connexions soudées sur le côté externe de la CCI. Les composants peuvent être montés des deux côtés du substrat, il suffit de souder leurs broches ou leurs fils de liaison dans des trous métallisés supplémentaires connectés aux autres fils et broches par les tracés. Des composants comme les connecteurs ou les indicateurs comprenant, par exemple, les diodes électroluminescentes peuvent prendre appui dans le dispositif de retenue du produit d'enrobage et être connectés aux broches de raccordement apporpriées, isolées par le produit d'enrobage.

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