What are the faults of non-standard distribution box

Although the production of non-standard distribution box is non-standard design, its design is also based on the actual needs of customers and the strict requirements of our country. The non-standard distribution box can protect power equipment. As for what causes its failure, today's Xiaobian will tell you some reasons for the failure of the non-standard distribution box:

Faults caused by improper selection of electrical appliances in non-standard distribution box

Due to improper selection of AC contactor capacity during manufacturing, AC contactors with the same capacity are installed for different outgoing circuits, and the imbalance of three-phase load is not considered, so the current level of some outgoing contactors cannot be increased by one current level based on the normal selection model, Therefore, the AC contactor is burnt out during the operation of the distribution box in high temperature season in summer.

Fault caused by the influence of ambient temperature on low voltage apparatus

The low-voltage apparatus in the distribution box is composed of fuse, AC contactor, residual current action protector, capacitor and meter. The normal working conditions of these low-voltage appliances are as follows: the upper limit of ambient air temperature shall not exceed 40 ℃; The average value of ambient air temperature in 24h shall not exceed 35 ℃; The lower limit of ambient air temperature shall not be lower than - 5 ℃ or - 25 ℃. If you don't operate according to this regulation, low-voltage appliances will easily cause faults.