Isolation switch contact portion overheat during operation is what causes it? A: The isolation switch overheated in operation, mainly overloading, the contact resistance increases, the operation did not completely closed due. Buy disconnectors Huayi Electric Power is your best choice! Welcome to inquire buy! Thank you for your attention. If the misuse or close with load isolation switch occur, you should calmly to another in the opposite direction to avoid misuse may occur. Is this: It has been found with a load error after closing outdoor isolation switch can not be immediately opened again; when found with load brake vacuum pressure isolation switch, isolation switch Ruoyi pull-account, no further together (if opened a little and found spark occurs, immediately closed). Running an isolation switch should conduct inspections. In the manned substation should once per shift; in unattended Power Distribution least once a week. Indoor isolation switch, Huayi Electric Power (certified), Harbin isolation switch provided by the Xi'an Huayi power plant. Xian Huayi Electric Power Equipment Factory (www.xahy.com) is a leader in Xi'an high-voltage circuit breakers, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Huayi Electric Power leadership with the staff warmly welcome all inquiries negotiations to create Huayi electricity better future.