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Dc Motor Protection |
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 May 30 2008, 04:55 AM
Post
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 Intermediate Member  Group: Full Member Posts: 34 Joined: 2-March 06 From: RUSSIA, Novosibirsk Member No.: 1,405  |
Dear!
Who can tell or explain me which kind of protection should I use to protect the DC motor? For example: 1. Very impotant! Minimal current relay in excitor circuit diagram which must be referenced with contactor in armature circuit diagram? Customer forces me to connect this relay with circuit-breaker in armature circuit diagram, but in my understanding of protection it can't be like that. 2. Circuit-breaker in excitor circuit diagram. 3. Circuit-breaker in armature circuit diagram. Again customer wants to use additional electo-magnetic maximal current relay in armature circuit diagram which will be referenced with circuit-breaker in armature circuit diagram to protect motor from inrush current. But I think no need to use this one, because normally the armature circuit-breaker already has this kind of protection inside. If anybody has experience in that area, please, help me! -------------------- Best Regards
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