Component Protection - Cooper Industries

2005 Cooper Bussmann67 This issue analyzes the Protection of electrical system components from faultcurrents. It gives the specifier the necessary information regarding the short- circuit current or withstand rating of electrical circuit components, such aswire, bus, motor starters, etc. Proper Protection of circuits will improve reliability and reduce the possibility of injury. Electrical systems can bedestroyed if the overcurrent devices do not limit the short- circuit current towithin the withstand rating of the system s components. Merely matching theamp rating of a Component with the amp rating of a protective device will notassure Component Protection under short circuit National Electrical Code covers Component Protection in several sections.

68 ©2005 Cooper Bussmann Analysis of Current-Limiting Fuse Let-Through Charts The degree of current-limitation of a given size and type of fuse depends, in general, upon the available short-circuit current that can be delivered by the

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  Protection, Current, Industreis, Component, Cooper industries, Cooper, Circuit, Fuse, Limitations, Component protection, Circuit current

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