SELECTIVE COORDINATION SOLUTIONS
Certain electrical power system designs need to ensure the selection and setting of protective devices cause the smallest possible portion of the system to be de-energized due to an abnormal condition.
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The natural advantages of circuit breakers make them the logical choice for overcurrent protection. This guide is intended to facilitate the design of selectively coordinated systems when using Square D™ I-Line™, NF and
This paper examines selective coordination methods for circuit breakers, beyond the traditional plotting of time-current curves (TCCs) alone, for high fault currents. Specifically, an energy-based circuit breaker tripping system, which can provide improved selectivity, series rated combinations, and favorable arc flash performance, is presented and examined.Read more about Energy-Based Tripping and Its Affects on Selective Coordination
High system performance achieved through selective coordination, required in changes to the National Electric Code® results in increased arc flash energy. This conflict between selective coordination and arc flash isexplained in this paper through real world examples.Read more about Selective Coordination versus Arc Flash Requirements