Understanding Short Circuit Motor Contribution
A back to basics approach
BY DARRELL BROUSSARD, GE Industrial Solutions
An electric motor’s contribution is the current generated by a motor or motors during a short circuit condition. It represents a small but important value that is needed to determine the maximum short circuit current available, thereby establishing the short circuit rating of electrical equipment. Regardless of the size or voltage rating of a motor, it can be demonstrated that motor contribution is present...
