+86 133 0619 7686 wxawd163@163.com

Home >> News >> Industry News

How can I Reduce the Frequency of Low Voltage Switch Cabinet Failures?

Apr. 28, 2020
Share

Low Voltage Switch Cabinet often has large and small failures in our daily use. For example, after long-term use of mine low-voltage switch cabinets, it will cause the failure of the switch cabinet due to improper operation, etc. Use has a great impact, so is there any way to avoid these failures or measures to reduce the damage to the switchgear. Next, Low-Voltage Power Distribution Cabinet Factory will give you a detailed explanation of this aspect.

Low Voltage Switch Cabinet

Low Voltage Switch Cabinet

Failure of mine low-voltage switchgear due to ambient temperature:

Low-voltage electrical appliances in mine switchgear are composed of fuses, AC contactors, residual current action protectors, capacitors and metering. These low-voltage electrical appliances are designed and manufactured according to the "Basic Standards for Low-Voltage Electrical Appliances", and their normal working conditions are specified accordingly: the upper limit of the ambient air temperature does not exceed 40. The average value of the ambient air temperature in 24 hours does not exceed 35, and the lower limit of the ambient air temperature is not lower than -5 or -25. The switchgear of the rural network transformation is operated outdoors. It not only generates high temperature due to direct sunlight, but also generates heat during operation. The temperature greatly exceeds the ambient temperature specified by these appliances, then failures due to overheating of electrical components in the switch cabinet will occur.

Failure due to product quality:

In the transformation of the rural power grid, because of the demand for mining switch cabinets are very large, but the construction period is short, the distribution box manufacturers need to supply the low-voltage electrical appliances in a hurry and a large number, so there will be no strict requirements for product quality Phenomenon, then there will be a failure soon after the product is put into operation. For example, some models of AC contactors cannot be operated because the contactor's closing coil burns out soon after the distribution box is put into operation.

The failure of mine low-voltage switchgear due to improper selection of electrical appliances:

Due to the inappropriate selection of AC contactor capacity during manufacturing, AC contactors of the same capacity were installed for different outlet circuits, and the imbalance of three-phase load was not considered, and the current level of some outlet contactors could not be selected normally Based on the model, a choice of current level is improved, which also causes the AC contactor to burn out during the high temperature season in summer. In the transformation of rural power grids, many of them are purchased low-voltage electrical appliances, and the quality requirements are not very high. The general requirements are as long as they can be used. Therefore, users have a lot of problems in the process of use, and spent a lot of money.

Our company also has Non-Standard Low Voltage Switch Cabinet for sale, please contact us.