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INSTANTANEOUS CIRCUIT BREAKER SETTINGS FOR THE SHORT-CIRCUIT PROTECTION OF DIRECT CURRENT 300 AND 600 VOLT TRAILING CABLES

By William Vilcheck, George Fesak and William Helfrich

Abstract

Present Federal regulations which specify maximum instantaneous circuit breaker settings for the short-circuit protection of coal mine trailing cables are discussed. Characteristics of mine power systems, which limit short-circuit current in dc trailing cables and minimum expected short-circuit currents for dc 300 and 600 V trailing cables, are analyzed. New maximum instantaneous circuit breaker settings, based on minimum expected short-circuit currents and typical circuit breaker tolerances, are proposed with emphasis on safety and field tests are cited

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.186.9439
Provided by: CiteSeerX
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