TRICONEX DI3301

 TRICONEX DI3301 
 TRICONEX DI3301 
 TRICONEX DI3301 
变电所TV电压经常出现不平衡。往往把电压不平衡总认为是一次系统接地。若并非一次接地，便可能在查找时，分、合断路器造成对用户的短时停电，另一方面也可能因为未能及时找到接地点，而引起事故扩大。
1　一般情况下电压不平衡的分析
　　(1)　中性点不接地系统电压不平衡，可能是由于熔丝熔断而造成，即高压熔丝熔断，熔断相电压降低，由于TV还会有一定的感应电压，所以其电压并不为零而其余两相为正常电压，其向量角为120°，同时由于断相造成三相电压不平衡，故开口三角形处也会产生不平衡电压，即有零序电压，如：C相高压熔丝熔断，零序电压大约为33V左右，故能起动接地装置，发出接地信号。
　　二次侧熔丝熔断时，与一次侧熔丝之不同在于：一次侧三相电压仍平衡，故开口三角形开口处没有电压，因而不会发出接地信号，其它现象均同一次侧熔丝熔断的情况。

◆ 企业名称：厦门泰尼电气有限公司  
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区： 全国 
◆ 联系人： 小黄《女士》
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