Maintenance for Commercial Sites

This article provides insight into the maintenance requirements for overcurrent protective devices and the potential impact on the arc flash incident energy when maintenance is not performed properly. Electrical preventive maintenance and testing are some of the most important functions to be performed in order to maintain the reliability and integrity of electrical distribution systems, as well as for the protection of equipment and personnel. However, preventive maintenance of electrical systems and equipment, specifically with regard to overcurrent protective devices is often overlooked or is performed infrequently or inadequately. An unintentional time delay in the operation of a circuit breaker, due to a sticky operating mechanism, can cause the incident energy of an arc flash to rise, sometimes dramatically.
 

Muhammad Afzal

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