What should I do if there is moisture in the outdoor distribution box?

According to the size of the distribution box, a drainage dehumidification device can be installed in the distribution box, which is simple and convenient to install, and the water vapor in the cabinet can be directly discharged through the hose. SPR-CN-S1 smart dehumidifier is a drain type dehumidifier with a sensitive sensor that will automatically dehumidify once the humidity exceeds the set threshold.

(1) Use the power outage to wipe the equipment and keep the distribution box clean.

2) Closed distribution box. The ventilation windows and vents of the high-pressure chamber shall implement air filtration measures in accordance with the regulations. Keep high-pressure room air clean.

3) The cable trench, cable tunnel and cable hole under the distribution box are waterproof sealed, and natural ventilation and moisture exhaust channels are installed to keep the air dry in the cable tunnel.

4) Install rain traps on the distribution box.

5) Eliminate the defect of rain leakage on the top of the distribution box in time.

6) The iron plate at the bottom of the closed bus bridge in the outlet is changed to a steel wire mesh plate, or a l00mm gap (close to the wall) is opened horizontally, and the rainwater can be discharged from the gap when the steel plate is fixed by the outlet through the wall casing. No one can enter the switchgear.

7) For the switchgear with low insulation margin and poor operating environment, install SXSEPRI-NL anti-condensation device and overhead dehumidification device, which is automatically controlled according to humidity. Remove moisture from the cabinet.

This answer is compiled by Shaanxi Saipurui Electric **** Electric. sxsepri

Refer to reading.

This can lead to the following problems:

1.The wiring of the internal terminal blocks of the electrical cabinet is rusted and corroded, which leads to the increase of contact resistance and the electrical fault caused by false connection and ignition.

2.The contact resistance of the electrical cabinet protection grounding increases, and the protective grounding does not play a protective role, causing personal safety.

3.The main and auxiliary contacts of the electrical contactor are corroded (green patina), causing the electrical circuit (main circuit and control circuit) to fail due to poor closure.

4.This can lead to a decrease in the ground insulation of electrical components, which can lead to electrical faults.

Take measures:1is generally equipped with heating elements and ventilation drying measures. 2.Strengthen daily patrols and inspections.

(1) The cable trench and cable tunnel outlet under the switch cabinet are tightly closed to prevent water ingress.

2) Combined with the implementation of fire prevention and anti-small animal measures, the bottom plate of the outlet room of the switch cabinet is sealed.

3) The cable trench and cable tunnel under the switch cabinet are equipped with moisture drainage facilities.

4) In the early stage of substation infrastructure, strictly control the selection of equipment. The creepage ratio distance of the pillar insulator in the switch cabinet must comply with the relevant regulations.

5) The high-pressure chamber is equipped with natural ventilation facilities or a dehumidifier is installed.

6) Use a power outage to wipe the device. For those who have already developed condensation and are more severe, it is recommended to use SPR-NL anti-condensation device or HK-Sepri-T overhead dehumidification system to solve such problems.

As far as the traditional treatment method is concerned, the general method to solve the problems of cabinet moisture, condensation and other problems is to install electric heaters, fans, desiccant or seal the cabinet body, these methods can solve the problem of moisture and condensation in the cabinet in a short time, but can not solve the problem of moisture in the cabinet.

Because: 1) with an electric heater, the inside of the equipment is heated to solve the condensation phenomenon, but this method can not fundamentally eliminate the condensation, the reason is that this method only increases the degree of unsaturation of water vapor in the air, and does not discharge the water vapor in the cabinet.

2) Use moisture repellent to hang silicone bags or other water-absorbing materials in the cabinet, but in fact, because its water absorption effect is limited, and the absorbed water is difficult to discharge, the effect is often not obvious, and the maintenance workload increases.

3) Use a fan to reduce the humidity in the electrical cabinet through the convection of the air and the dry air outside, and it does not work when the ambient humidity is large, which is easy to cause dust and dirt to enter and cannot achieve the purpose of moisture-proof.

4) Plugging with cement can only reduce the ingress of moisture, but cannot prevent the ingress of humid air.

To carry out a long-term effective method for the moisture in the cabinet, the SPR-NL- anti-condensation device used in the major substations is very small, and the moisture in the cabinet can be ultrasonically atomized into water droplets and discharged out of the cabinet. It can also be dehumidified at low temperatures. Realize automation, when the humidity in the cabinet exceeds the standard, it will work automatically.