Posted 22 October 2009 - 06:00 AM
Any one have experience with SKF's TKED1 EDM bearing spark discharge detector.
I've tried one on a 400KW Pope motor with known EDM issues and found the detector was indicating a lot of activity (hits) at the DE and NDE ends. Was also picking up and registering hits from the motor cable and surrounding metalwork - so a bit confuesed as to how useful it will be.
Posted 24 October 2009 - 06:33 PM
Is (only) one end bearing on the motor insulated? Then maybe the insulation is broken?
Posted 25 October 2009 - 06:38 AM
Welcome to the forum.
The device is designed to pick up transient EMI pulses that are generated by a discharge in the bearings. It will also pick up the switching transients from the VFD is held close to the cables etc.
Have a look at http://www.eng-tips.....cfm?qid=231381
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Posted 26 October 2009 - 02:56 AM
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