The vast majority of things are afraid of high temperatures. For example, high temperatures can cause heat stroke, will make the computer burned, relays are in fact no exception.

Relays are also afraid of heat components, high temperature can accelerate the internal plastic and insulation materials of the relay aging, contacts are oxidation corrosion and arc extinguishing difficulties, the technical parameters of the electrical components decay, reliability is reduced, because the internal high-voltage switch is equipped with moisture and insulation heaters, therefore, the entire system design can not be close to the relay moisture and insulation heaters, and should maintain good ventilation conditions.

Under low pressure conditions, the heat dissipation condition of the relay becomes bad and the coil temperature rises, which makes the relay's given suction and release parameters change and affects the normal operation of the relay. Low pressure also reduces the insulation resistance of the relay, makes it difficult to extinguish the contact arc and makes it easy to fuse the contact, which affects the reliability of the relay. For low pressure conditions, it is recommended to use the whole machine sealing method.

Although the relay is afraid of heat components, but too low a temperature can not be ignored, in fact, there is a "degree" between anything, too big or not as good. Low temperature can make the contact cold sticky role intensified, the contact surface dew, many manufacturers of relays indicate a minimum temperature of 25 ℃, but high-voltage switch applications in alpine areas are not few, so it is recommended that the selection of attention to allow room to avoid the relay due to low temperature and unreliable, where appropriate, in alpine areas to increase the heater, to ensure that the relay in low temperature reliable operation, to ensure that the entire system is stable operation.