电气工程及其自动化专业【毕业设计 文献综述 开题报告】高压隔离开关温升的研究和设计（可编辑）_精品.doc

电气工程及其自动化专业【毕业设计+文献综述+开题报告】高压隔离开关温升的研究和设计 Temperature rise of high-voltage isolation switch and Design Abstract High-voltage isolating switch is in electrical systems in power plants and substations important electrical switches, using a wide range and high volume, and its main features are: high-voltage electrical appliances and devices to ensure safety at work in repair, the role of the voltage from the isolation, can not be used with Cut off, breaking into the load current and short circuit current, can only be used does not produce a strong arc some of the switching operation, which means it does not have the arc function. High-voltage isolation switch at work constantly with the current flow, the temperature will rise, which will affect the performance of high-voltage isolating switch, and may lead to high-voltage isolation switch overheating. The temperature rise of high-voltage isolation switch is mainly due to the resistance of the switch circuit. Loop resistance greater, the higher the temperature to rise. Temperature rise is that it is an important performance index. It affects the manufacturing cost of switching, operation safety and life. The temperature rise is that it switches itself both heating and cooling combined result of factors. DC voltage drop method using high-voltage isolating switch circuit resistance test experiment to find the temperature rise of high-voltage isolation switch is mainly due to the size of loop resistance. When the loop resistance is large, the temperature rise will be high isolation switch, circuit resistance is very small, the temperature rise is not how high. Temperature rise for high-voltage isolation switch is proposed countermeasures. Electrical properties such as the use of better materials, improved high-voltage isolation switch contact system. High-voltage isolation switch on the improved design, the use of more advanced production technology, a more favorable structure of the device, bette