船用断路器短路分断能力的换算

Short Circuit Breaking Capacity Conversion of Marine Circuit Breaker

断路器的额定短路分断能力是由制造厂提供的,该断路器在额定频率和规定的功率因素下的分断能力值。在船舶交流电力系统中,短路时的功率因数较低,一般cosφ为0.1～0.2,为此,在设计中选用断路器时,要进行其短路分断能力换算,本文介绍船用断路器短路电流分断能力的换算。

The rated breaking capacity of the breaker is short circuit breaking capacity value of the breaker provided by manufacturer under the rated frequency and rated power factor. In the vessel A.C. power system, when short circuit occurs, the power factor will be very low （generally cos φ is 0.1 ,--- 0.2）. Therefore, when choosing breaker for design, conversion will be made for short circuit breaking capacity. The following details mainly describes breaker short circuit breaking capacity conversion of marine circuit breaker