The reason isolating switch contact resistance increases have? A: The reason for the increased contact resistance: the knife blade and a big mouth contact repulsion at the isolation switch, blade chummy lax, resulting in surface oxidation, the contact resistance increases. Secondly isolation switch pull together process will cause arcing, burns Xiangfan isolation switch contacts, the contact resistance increases. You are welcome to buy them conductive circuit overheating. Operation often occurs abnormal heat conductive loop phenomenon Huzhou disconnectors, mostly due to the static compression spring finger fatigue, deterioration of the characteristics, static finger unilateral contact and long-run increase in contact resistance caused. Quiet operation due to the long-standing finger compression spring compression, if the operating current larger Tai'an isolation switch, temperature exceeds the allowable value, it will make it worse elasticity, a vicious cycle, eventually leading to burning, which is caused by contact heat the main reason. In addition, the contact silver coating process is poor, easy to wear exposed copper contact surface is dirty, the contact insert enough clamp bolt corrosion caused by the contact surface pressure is reduced and so is the cause of fever in Zaozhuang disconnectors, Huayi Electric Power (Certified ), isolating switch is provided by Xian Huayi power plant. Xian Huayi power plant (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. Huayi power in leadership with the staff warmly welcome all inquiries negotiations to create electricity Huayi a better future.