高湿环境下电气接点动作缺陷消除途径研究  

Research on Elimination of Electrical Contact Action Defects in High Humidity Environment

作　　者：蔡之文 洪元瑞 罗莎 陈俊杰 张金丽 刘云磊 许行 CAI Zhiwen1 , HONG Yaunrui2 , LUO Sha3 , CHEN Junjie3 , ZHANG Jinli3 , LIU Yunlei1 , XU King1(1. Hangzhou Kehong Instrument and Meter Co. , Ltd. , Hangzhou 311122, China; 2. East China branch Company, State Grid Corporation of China, Shanghai 200120, China; 3. State Grid Shanghai Electric Power Research Institute, Shanghai 200437, China)

机构地区：[1]杭州科宏仪器仪表有限公司,杭州311122 [2]国家电网公司华东分部,上海200120 [3]国网上海电力科学研究院,上海200437

出　　处：《电力与能源》2018年第5期649-651,共3页Power & Energy

摘　　要：变压器温度计是变压器重要的非电量保护装置,其电气接点缺陷直接影响变压器稳定运行。通过现场缺陷调研分析、试验溯源,发现目前相当一部分变压器温度计使用的为IP00微动开关和IP55外壳。在相对湿度较高、气候环境较差的条件下,防护等级为IP55的仪表,其仪表内外相对湿度基本一致,IP00微动开关易产生动作缺陷。从运行现场环境条件和微动开关防护等级以及温度计外壳结构等影响因子对电气接点动作缺陷机理进行分析验证,提出高湿环境下如何消除接点动作缺陷的建议。Transformer thermometer is an important nonelectric protection device of transformer, and its elec- trical contact defects directly affect the stable operation of transformer. Through field defect investigation, a- nalysis and test traceability, it is found that a considerable n mber of transformer thermometers currently use IP00 micro-switch and IP55 shell. Under the condition of higher relative humidity and worse climate environ- ment, the relative humidity inside and outside the instrument with IP55 protection level is nearly the same. IP00 micro-switch is easy to produce action defects. The mechanism of electrical contact action defects is ana- lyzed and verified from the environmental conditions on operation site, the protection level of micro-switch and the structure of thermometer shell. It is suggested that how to eliminate the defects of in high humidity envi- ronment.

关 键 词：电气接点 变压器 温度计 高湿环境 

分 类 号：TM645[电气工程—电力系统及自动化]