Superior Overcurrent Protection with Motor Short-Circuit Protectors

A never ending stream of magazine articles, IEEE papers, National Electrical Code proposals and revisions attest to the need for better protection of motors, controllers, and branch circuits. Superior branch circuit overcurrent protection can be obtained by a combination of specially designed motor short-circuit protectors and especially approved motor controllers. This paper explains the protection provided and mentions test results for a range of fault currents up to a very high level.