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motor failure through slip ring

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#1 Guest__*

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Posted 07 November 2004 - 05:57 PM

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

#2 marke


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Posted 14 November 2004 - 06:19 PM

Can you give more detail on what the actual failure is? i.e. insulation breakdown between rings, pitting of rings etc.

Best regards

#3 RalphChristie


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Posted 14 November 2004 - 09:53 PM

We've had also a similar problem in our plant.

See eng-tips.com
especially 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!


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