Porcelain fracture failure. 2005, Xuzhou power grid twice porcelain fracture failure, once the operation is run isolating switch Xi'an, once the price of isolation switch wiring in the construction process, the breaks are glued at the porcelain and the flange. Porcelain fracture related both disconnectors and product quality, but also with the overall quality and method of operation related to the isolation switch. Control may result in improper porcelain porcelain pieces cooked, dense uneven and cement loading problem of the poor in the firing process, combined with strict quality control measures, resulting in poor quality of individual vases are assembled product, put into operation on pose a great threat. The operator at the time of division and isolation switch operating improper methods, excessive force are likely to cause damage porcelain. In addition, in 2005 and 2004 also occurred knots 8 500kVSOPLT type knife support insulator cracking defects. How to determine the isolation switch contacts is overheating? A: According disconnectors paint or change the color of the test piece of warm color to determine the contact portion can also be determined based on the color of hair or dark blade. Now generally determined based on the results of infrared temperature measurement. Isolation switch factory outlets, Huayi Electric Power (certified), disconnecting switch provided by Xian 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.