在工业系统中，温度是表征设备运行正常的重要参数。随着工业用电负荷的不断增长，为了避免因设备发热而导致的突发事件，温度的自动监测已经成为工业安全生产的重要环节。
In the industrial system, temperature is an important parameter that characterizes the normal operation of the equipment. With the increasing load of industrial electricity, automatic monitoring of temperature has become an important part of industrial safety production in order to avoid unexpected events caused by the heating of equipment.
运行中的电气设备通常工作在高电压和大电流状态，设备中存在的某些缺陷会导致设备部件的异常温度升高。造成温度与接触电阻值的恶性循环，最终会导致设备不能正常工作，甚至烧毁，温度过高可能会引起燃烧、爆炸甚至设备损坏或质量事故。
The electrical equipment in operation usually works in high voltage and high current state. Some defects in the equipment can cause the abnormal temperature rise of the equipment components. The vicious cycle of temperature and contact resistance will eventually lead to the failure of equipment to work properly or even to burn out. If the temperature is too high, it will cause combustion, explosion or even equipment damage or quality accident.
高压电气设备，由于故障测试手段有限，特别在开关箱和封闭母线内温度超限点更不易被发现。随着温升时间的延长，温度超限处将因发热而加大氧化程度，进而可能造成烧毁母线、触头、接点毁盘、停电等重大事故。
High voltage electrical equipment, because of the limited fault testing means, especially in the switch box and the closed bus temperature limit point is more difficult to be found. With the prolongation of the temperature rise, the temperature overrun will increase the degree of oxidation due to heating, which may cause major accidents such as burning bus, contact, contact failure, power failure and so on.