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Do-It-Yourself (DIY) Question & Answer Forum
Contactors and overloads
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<blockquote data-quote="Evans Electric" data-source="post: 482009" data-attributes="member: 1408"><p>So is it an RCD or an MCB that is tripping ? </p><p></p><p>And as Phil says , try disconnecting the motor and just start /stop the starter (Contactor) without a load then with a load such as a lamp as Phil says .. if it works but trips as soon as you try the motor ...and you have decided that the device that trips is in fact an RCD then , again as Phil says , could be a N - E fault , capacitor could be earthing .</p><p></p><p>If however its an MCB that trips then that could just be the start up load . If the rewinders have tested it then we assume the motor is OK . </p><p></p><p>Is it possible to start the motor spinning by hand then press the start button , which should reduce the start current . ? </p></blockquote><p></p>
[QUOTE="Evans Electric, post: 482009, member: 1408"] So is it an RCD or an MCB that is tripping ? And as Phil says , try disconnecting the motor and just start /stop the starter (Contactor) without a load then with a load such as a lamp as Phil says .. if it works but trips as soon as you try the motor ...and you have decided that the device that trips is in fact an RCD then , again as Phil says , could be a N - E fault , capacitor could be earthing . If however its an MCB that trips then that could just be the start up load . If the rewinders have tested it then we assume the motor is OK . Is it possible to start the motor spinning by hand then press the start button , which should reduce the start current . ? [/QUOTE]
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Contactors and overloads
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