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Do-It-Yourself (DIY) Question & Answer Forum
Reversing A Single Phase Fan
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<blockquote data-quote="Marvo" data-source="post: 290506" data-attributes="member: 20838"><p>This would be my guess from your resistance readings. Brown would be common, the blue would be the end of the start windings and the black the run winding. Live supply goes to common (via any thermal overload protection first) Neutral directly to the run winding and cap between the neutral on the run winding and the start winding.</p><p></p><p>I would check the run current drawn is less than the stated running current on the motor tag plate. If the run current is higher then there's a problem so disconnect it quickly and go back to the drawing board if this is the case.</p><p></p><p>Note, if there's only 3 wires coming from the motor it means you won't be able to make it run in reverse, you can only do this if common isn't internally bonded and all 4 winding wires are brought out into the termination box.</p></blockquote><p></p>
[QUOTE="Marvo, post: 290506, member: 20838"] This would be my guess from your resistance readings. Brown would be common, the blue would be the end of the start windings and the black the run winding. Live supply goes to common (via any thermal overload protection first) Neutral directly to the run winding and cap between the neutral on the run winding and the start winding. I would check the run current drawn is less than the stated running current on the motor tag plate. If the run current is higher then there's a problem so disconnect it quickly and go back to the drawing board if this is the case. Note, if there's only 3 wires coming from the motor it means you won't be able to make it run in reverse, you can only do this if common isn't internally bonded and all 4 winding wires are brought out into the termination box. [/QUOTE]
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Reversing A Single Phase Fan
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