Title :
Interrupting Duty
Author :
Simpson, Ronald H.
Author_Institution :
With GE Energy Syst. in Norcross, Norcross, GA, USA
Abstract :
This article discusses the interruption rating of low-voltage devices. The application of low-voltage circuit breakers for interrupting duty requires consideration of motor contributions, power factor of the fault current, and ground faults from solidly grounded sources. Under specific conditions, ground fault duty can exceed the three-phase bolted fault value and over duty the equipment.
Keywords :
circuit breakers; fault currents; interrupters; circuit breaker; fault current; ground fault; interrupting duty; low voltage device; power factor; three phase bolted fault value; Circuit breakers; Circuit faults; Fault currents; Reactive power; Resistance; Substations; Voltage control;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIAS.2010.939621
