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What is Cable Sizing for Circuit Breakers about?

This document discusses criteria for sizing power cables for circuit breaker controlled feeders, focusing on short circuit current withstand capacity. It provides equations to calculate the minimum cable cross-sectional area needed to withstand short circuit currents for a given time based on cable material properties. For circuit breaker controlled motor feeders, it determines the fault clearing time is 160 milliseconds based on relay and breaker characteristics. Using this value, it calculates the minimum

Author

Mohanta Amrit

Language

EN