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When do you choose normal or closed contact for any switch or sensor in your control circuit?

Electrical Electrical Safety Control
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Question added by Deleted user
Date Posted: 2016/08/14
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khalil bounab
by khalil bounab , Laboratory Chemist , SONATRACH

 Yes , definitely it is normal

Deleted user
by Deleted user

any switch operates the machine ,it must be normal open,because when the power line is cutting the machine is not work and no dangerous will appear, and any switch stopes the machine ,it must be normal close because when there is cut in power line the machine will stop to prevent any acciedent

 

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