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testing motors help
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<blockquote data-quote="Evans Electric" data-source="post: 39877" data-attributes="member: 1408"><p>For a DOL , best to disconnect from starter in case there is a problem there, then megger to earth (500v) and across for any breakdown then resitance U1 - V1- W1. Usually looking for all three windings to be the same resistance, usual fault would be one winding different to others or open circuit. Star/Delta windings would be U1-U2 V1-V2 and W1-W2 .</p><p></p><p>Older motors are marked up A1- B1- C1 BTW .</p><p></p><p>Deke</p></blockquote><p></p>
[QUOTE="Evans Electric, post: 39877, member: 1408"] For a DOL , best to disconnect from starter in case there is a problem there, then megger to earth (500v) and across for any breakdown then resitance U1 - V1- W1. Usually looking for all three windings to be the same resistance, usual fault would be one winding different to others or open circuit. Star/Delta windings would be U1-U2 V1-V2 and W1-W2 . Older motors are marked up A1- B1- C1 BTW . Deke [/QUOTE]
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