星三角切换时间对剩余电流动作断路器的影响  

Impact of Star-delta Switching Time on the Residual Current Circuit Breaker

作　　者：杨雄业 

机构地区：[1]中交天和机械设备制造有限公司,江苏省常熟市215500

出　　处：《建筑电气》2018年第1期25-28,共4页Building Electricity

摘　　要：电机启动方式采用星三角启动,时间继电器上可调的切换间隙时间的长短会影响电机启动瞬间浪涌电流的大小,有一定的几率引起剩余电流动作断路器瞬时脱扣。通过现场采集星三角启动电机的浪涌电流波形,分析数据得出星三角切换间隙时间的长短与浪涌电流的大小成正相关的结论,以及浪涌电流即使超过剩余电流动作断路器的瞬时脱扣值,如果不持续一段时间也不足以让剩余电流动作断路器发生脱扣的结论。The star-delta starting is used in the motor starting mode, and the switching time which can be adjusted on the time relay will impact the instantaneous surge current of motor starting, which might result in instantaneous trip of a residual current circuit breaker to some extent. Based on the surge current waveform of star-delta starting motor collected on site, the following conclusion is made through data analysis, i. e. the star-delta switching time is in positive correlation to the surge current, and even if the surge current exceeds the instantaneous trip value of a residual current circuit breaker but it does not last for a certain time of period, the residual current circuit breaker will not be tripped.

关 键 词：星三角切换 星三角切换间隙时间 剩余电流动作断路器 浪涌电流 剩余电流动作脱扣 过流脱扣 瞬时脱扣 延时脱扣 

分 类 号：TU852[建筑科学]