CONSIDERATION OF MOTOR CONTRIBUTION IN SERIES RATINGS

Motor short-circuit contribution is a real consideration in low-voltag e systems. It must be considered in deciding whether to apply series r atings of overcurrent protective devices. Virtually every electrical s ystem has motors in it someplace. This paper confirms the existence of low-voltage motor short-circuit contribution by test, examines some o f the relevant literature, explores typical installations, and recomme nds application guidelines.