In distribution box, switch cabinet, outdoor terminal box and other small power transmission and transformation equipment, humid air is easy to cause metal body rust and corrosion, and shorten the service life of the equipment.
The insulation distance in the sealed box is compact. If the air is too wet and causes condensation, it will cause serious consequences of tripping and even burning the equipment.
In the southern coastal areas of China and the areas around Qinhuai line, the air moisture is abundant, so it is difficult to use the traditional heating and ventilation dehumidification methods. Especially in the case of large temperature difference inside and outside the cabinet or in the rainy season, serious condensation will occur, which directly threatens the safe operation of power transmission and transformation equipment.
Through a large number of field investigation, the environment of power operation system in China is generally wet and ponding, and this kind of bad electrical operating environment is very unfavorable to the service life of electrical equipment and the operation environment of power system.
For example, the switch cabinet is affected by damp and flash explosion, the distribution cabinet is affected by damp and mildew corrosion, the distribution cabinet and the distribution box are wet and dewy, the bus bridge is short circuited, and the cable trench is wet and waterlogged.
How can we effectively solve such problems, make the electrical operation environment reach a perfect state, and reduce the hidden dangers of power system operation? MNS low voltage drawer cabinet is here to answer:
1、 Improve the distribution room environment.
1. It is forbidden to stack sundries in the power distribution room. The indoor equipment shall be free of dust and sludge, and the ground shall be free of dust and ponding, and the environment shall be clean and tidy.
2. The lighting in the distribution room is good enough and the ventilation equipment is good.
3. The indoor environment temperature of the distribution room should not exceed 40 ℃ and the relative humidity should be less than 80%.
4. The drainage in the power distribution room is unobstructed, and there is no leakage on the roof and underground. The facilities of pest control and rodent prevention are perfect.
5. The distribution room shall be treated with waterproof partition.
2、 Install dehumidification equipment.
由风扇将潮湿空气抽入机内，通过热交换器，此时空气中的水份冷凝成水珠， 变成干燥的空气排出机外， 如此循环使室内湿度降低。
The humid air is pumped into the unit by the fan and passed through the heat exchanger. At this time, the moisture in the air condenses into water droplets and turns into dry air to be discharged out of the unit. This circulation reduces the indoor humidity.
2. Air conditioning and dehumidification equipment.
Dehumidification is to use the low-temperature condensation effect of air-conditioning. Refit it with air-conditioner. The condenser and evaporator can be placed separately in the same room. The evaporator can collect water to prevent secondary evaporation. The water collecting container has a small water level switch and controls a small water pump. If it is convenient to drain water, it can be directly connected to the sewer pipe. If the room temperature needs to be controlled, the condenser can be installed outdoors.
3. The automatic dehumidifier is installed in the power distribution cabinet.
Automatic dehumidification can effectively discharge the moisture in the distribution cabinet out of the cabinet to prevent condensation.