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ekstra   ara
 Post subject: Wound Rotor Circuit Arc Flash Risk
PostPosted: Thu Aug 13, 2020 11:35 am 
Sparks Level

Joined: Sat Apr 04, 2009 9:50 pm
Posts: 105
Location: San Antonio, TX
An engineer asked my the following question.

Wound rotor induction motors have an external circuit coming from the motor rotor, through slip rings, to a variable resistor bank. The slip ring enclosure and the resistor bank cabinet have an arc flash risk. Is there an established method/standard for calculating the incident energy along the motor secondary circuit? Have you ever run into the situation before?

I do not have any experience with wound rotor induction motors.

Any one cares to enlighten me? Thanks.


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