Guest Posted November 7, 2004 Report Share Posted November 7, 2004 we have just experienced 6 failures in as many weeks when starting a large motor using slip-ring & liquid starter. the motor starts fine once repaired. the motor runs continously for 5 days then switched off. The failure occured everytime we restart after the weel-end. The failure occurs in the slip-ring zone.Thank you Link to comment Share on other sites More sharing options...
marke Posted November 14, 2004 Report Share Posted November 14, 2004 Can you give more detail on what the actual failure is? i.e. insulation breakdown between rings, pitting of rings etc. Best regards Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
RalphChristie Posted November 14, 2004 Report Share Posted November 14, 2004 We've had also a similar problem in our plant. See eng-tips.comhttp://www.eng-tips.com/viewthread.cfm?qid=91965especially the comment of edison123 In our case we've asked the manufacturer to increase the distance between the rings for a larger gap and to clean carbondust easier. It seems as if our problem is solved, although we are still monitoring the motors. Sidenote: I will reply in the eng-tips forum after one year. (7 April 2005) Thanx for a great site! RegardsRalph Link to comment Share on other sites More sharing options...
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