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I.R Test on an Isolated Motor on a live working Industrial Machine
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<blockquote data-quote="roys" data-source="post: 416181" data-attributes="member: 5044"><p>I have certainaly IR tested motors on production lines with just the local isolators off, and motors proved dead, with no issues . A lot of the time inter posing relays are between the PLC outputs and the output functions anyway.</p><p></p><p>Q2 there is no way any other person should be able to touch your IR tester connection points, no worries about people touching the general metal work.</p><p></p><p>Q3 again no worries with the thermistors they are insulated / isolated between them and the windings.</p><p></p><p> As I am sure you are aware great care has to be taken when working near adjacent live parts or moving plant, sometimes this is achieved by physical barriers. I would have thought that in these circumstances Risk Assessments and Permit To Work safe systems of work will be followed.</p><p></p><p>Don't know your experience but our RA's always had a line in them about persons must be competent to carry out task. Also never stick your fingers on an electrical terminal that hasn't been proved dead first, remembering that on production lines a motor may be dead one minute and live the next due to the control logic.</p><p></p><p>Watching the rugby just now so I hope my answer makes sense as am a bit distracted<img class="smilie smilie--emoji" loading="lazy" alt="😄" title="Grinning face with smiling eyes :smile:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f604.png" data-shortname=":smile:" /></p></blockquote><p></p>
[QUOTE="roys, post: 416181, member: 5044"] I have certainaly IR tested motors on production lines with just the local isolators off, and motors proved dead, with no issues . A lot of the time inter posing relays are between the PLC outputs and the output functions anyway. Q2 there is no way any other person should be able to touch your IR tester connection points, no worries about people touching the general metal work. Q3 again no worries with the thermistors they are insulated / isolated between them and the windings. As I am sure you are aware great care has to be taken when working near adjacent live parts or moving plant, sometimes this is achieved by physical barriers. I would have thought that in these circumstances Risk Assessments and Permit To Work safe systems of work will be followed. Don't know your experience but our RA's always had a line in them about persons must be competent to carry out task. Also never stick your fingers on an electrical terminal that hasn't been proved dead first, remembering that on production lines a motor may be dead one minute and live the next due to the control logic. Watching the rugby just now so I hope my answer makes sense as am a bit distracted😄 [/QUOTE]
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I.R Test on an Isolated Motor on a live working Industrial Machine
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