Title :
IEC medium-voltage circuit-breaker interrupting ratings-unstated short-circuit considerations
Author :
Cossé, Roy E. ; Hazel, Terence G. ; Thomasset, Georges
Author_Institution :
M.W. Kellogg Co., Houston, TX, USA
Abstract :
IEC medium-voltage circuit-breaker interrupting ratings are reviewed using typical petrochemical examples. This paper investigates the complexity of high-magnitude X/R ratios, and short-circuit current zero-axis crossings beyond the interrupting time of the standard circuit-breaker for generator applications. Guidelines are provided, enabling the engineer to correctly define the circuit-breakers and switchgear for these applications
Keywords :
chemical industry; circuit breakers; electric generators; machine protection; petroleum industry; short-circuit currents; standards; IEC medium-voltage circuit-breaker interrupting ratings; IEC standards; high-magnitude X/R ratios; petrochemical industry; short-circuit current zero-axis crossings; standard circuit-breaker; switchgear; unstated short-circuit considerations; Circuit testing; Delay; Guidelines; IEC standards; Industrial power systems; Medium voltage; Petrochemicals; Power engineering and energy; Switchgear; Thermal stresses;
Conference_Titel :
Petroleum and Chemical Industry conference, 1998. Industry Applications Society 45th Annual
Conference_Location :
Indianapolis, IN
Print_ISBN :
0-7803-4897-4
DOI :
10.1109/PCICON.1998.727903
