A company specialized in electrical engineering from unique power in Europe. Design and construction of equipment for power circuits adapted to your specifications

Engineering / Services

AMC ETEC is a specialist design and manufacturing of customized electro-intensive to install the specific needs of its customers. Creation of guidance system support components and insulation. Design and manufacture of bus bars.

Published the : 3/23/2016, by Matthieu LINDEBOOM

Translation : Français, Deutsch, Italiano, Español

Switch that heats

I am a maintenance operator on high intensity disconnectors 20kA with contacts in the open air / outdoor contacts, I have a switch that heats after a stop period of two months.
It seems that the contact pads are in the process of unwelding / desoldering...
What can I do to fix this issue?


All conventional switches are sensitive to dust on their contacts when they are in open air.

Indeed the accumulated dust can quickly form a strong interface when closing the contacts.

The particles are embedded in the silver or silver plated contacts, increasing their electrical resistance until the melting of solders and the destruction of the unit by a joule effect / heating effect.

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Key words : Switch, switch that heats, hot switch

For the sake of excellence and competence at the service of its customers, AMC ETEC is certified ISO 9001 version 2008.

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