What are the common faults of distribution boxes
Release time:
2023-06-06
1. Faults caused by environmental temperature on low-voltage electrical appliances: Temperature has a significant impact on the use of electrical equipment, especially in the summer when high temperatures are a major concern for distribution cabinets.
1. Faults caused by environmental temperature on low-voltage electrical appliances:
Temperature has a significant impact on the use of electrical equipment, especially in the summer when high temperatures are a major concern for distribution cabinets. There are also many faults caused. The low-voltage electrical appliances, fuses, AC contactors, residual current operated protectors, capacitors, and measuring meters in the distribution box should all operate in a normal temperature range for balanced operation. Generally speaking, the upper limit of the air temperature around the distribution cabinet should not exceed 40 ℃; The average temperature of the surrounding air within 24 hours shall not exceed 35 ℃; The lower limit of the ambient air temperature shall not be less than -5 ℃ or -25 ℃
2. Short circuit faults caused by water ingress or moisture:
This type of fault is often caused by poor sealing performance or improper installation position of the distribution cabinet. Therefore, to avoid this type of fault, a place with no water accumulation at least 30 cm above the ground should be selected for installation. The protection level of the distribution cabinet must meet the requirements of waterproof and dustproof.
3. Faults caused by unreasonable electrical design in the distribution box:
Due to incorrect selection of low-voltage electrical equipment during design and manufacturing, the carrying capacity of low-voltage electrical equipment is too small, and the capacity selection of switch circuit breakers and AC contactors is not appropriate. Therefore, it is necessary to leave margin in the design and selection to avoid faults caused by overcurrent.
Related News