1, environmental temperature on the influence of low-voltage electrical failure: distribution box is low-voltage electrical appliances, by fuse, AC contactor, residual current action protector, capacitor and meter, etc., they will be affected by low temperature, if the temperature is too low, it will affect our use;
2, product quality caused by fault: explosion-proof distribution box if the quality is not qualified, the fault.Huayi Electric prompts such as some types of AC contactors in the distribution box shortly after put into operation, because of the contactor closing coil burned out and unable to run;
3. Failure caused by improper selection of electrical appliances in the explosion-proof distribution box:Due to the manufacturing capacity of ac contactor choose inappropriate, for different wire loop with installation capacity of ac contactor, without considering the unbalanced three-phase load situation, and not part of the line contactor current level on the basis of normal selection model, enhance the level of a current choice, resulting in high temperature in summer season when running the exchange of contact burn out.
