Achieving effective selective coordination design

摘要

Mandated selective coordination has changed the way design engineers think about designing electrical distribution systems. Engineers responsible for developing and vetting selective coordination systems that meet NEC requirements often face difficult challenges. Balancing the need for business continuity, equipment protection, personnel safety, and managing costs can be fraught with pitfalls. Knowing NEC requirements, observing design optimization methods, coordinating transfer switch ratings with circuit breakers and fuses, and satisfying special application needs are essential for effective selective coordination.