On-load phase-change and wire-change device for single-channel transformer direct-current resistance tester

• Main Authors: WANG ZHENGXUE, HUANG SILEI, GUO SHIYUN, LIU JUN, MA MINGFA, CAO YONG, DOU YUQIU, GUO XUPENG, YANGQINGZHUOMA, SUN BAOLEI, ZHENG MIN, MA SHIXU, ZHU JUN, MA YULIN, MA SHUNQING, ZHANG HONGQIANG, WANG QIYUAN, LI YONGSHENG, REN JIANMIN, PU YIN, DUAN YIPING, ZHANG ZHISHENG, QU YOUQING, TAN SHENGLEI, JIA ZHONGJUN, LI SHANDONG, MA HONGLIN, YE HAIPING, HA CHENGWEI, DU XINGDONG, QI BINBIN, DING MENG, PENG JIAQI
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

An on-load phase-change and wire-change device for a single-channel transformer direct-current resistance tester relates to an auxiliary expansion device of a single-channel direct-current resistancetesting instrument of a transmission-transformation-distribution transformer in the power industry. The structure is as follows: eight lead terminals are connected with a test lead to serve as a testsignal input end of the device, four test terminals are connected with a direct-current resistance tester to serve as a test signal output end of the device, transition resistance control switches control the on-off states of corresponding transition resistance loops respectively, and resistance test line selection switches control the on-off states of corresponding loops respectively. The beneficial effects of the device are that: the climbing wiring frequency can be reduced, the charging and discharging frequency and time of the single-channel direct-current resistance tester caused by wirechanging and gear shifting