负荷开关在广州地区的应用

Application of Load Switch in Guangzhou Area

通过理论分析和实践,总结了应用负荷开关需注意的问题,如高运行可靠性理念、整体抗短路水平、保护热稳定不足的电缆、熔断器的最小熔断电流、组合电器的转移电流及断路器的开断电流等。并指出,负荷开关应拓展断路器方面的功能,使广州地区中压配网的跳闸事故压至最低水平。

According to the study in theory and practice, some problems are given, which should be noted when load switch would be used, such as the idea for increasing its operation reliability, whole level to withstand short circuit, protection of power cable that the thermal stabilization of which is poor, the least melt-break current of fuse, the transfer current of assembled switchgear and the interrupting current of circuit breaker etc. The author points that, in order to make the fault-trip would be on the off chance on MV power distribution network of Guangzhou, the function of circuit breaker in load switch should be extended.