How to make waterproof joints well protected against moisture

Waterproof connector switch is mostly made of bulletproof rubber and other materials, fire resistance, moisture resistance, anti-collision performance are high, the appearance of lubrication, when buying should be considered when its feel, to feel to start to determine the switch material, and ask the dealer. Generally speaking, the appearance is not too lubricated, touch very thin, brittle feeling of the product, the performance is not trustworthy. Now the waterproof connector specifications and models should be very common, in the use of a variety of problems will be encountered, such as waterproof connector how to prevent moisture? Substation waterproof junction box is an intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication and other equipment, generally installed next to the equipment. When the air is humid, especially during the rainy season, the outdoor switch waterproof junction box is damp and dewy, which can easily lead to a drop in the insulation resistance of the DC secondary circuit to ground, and the insulation resistance drops to zero, thus forming a DC positive or negative power grounding. If a two-point DC ground is formed, it will cause DC insurance to fuse, protection rejection or misoperation, and even damage the equipment, seriously threatening the operation of the power grid. Waterproof connector box moisture will make the terminal row screws and connecting piece rust, so that the secondary terminal contact is poor, but also make the current circuit terminal heat or even open circuit, the formation of the protection of the invalid or inaccurate operation, resulting in failure. If the transformer voltage and switching, temperature signal terminal contact is poor, it will cause the waterproof connector and measurement and control, protection device operation abnormality, false signal, resulting in operator judgment error, wrong analysis. It is of great significance to find and analyze the causes of moisture in the waterproof junction box and take measures to prevent accidents. Substation waterproof junction box seems to be a brief accessory equipment, its protection is often simply ignored. However, the current situation is that a considerable part of the substation waterproof junction box has serious terminal row corrosion, which seriously affects the operation of the equipment. Therefore, it is very important to strengthen the selection, construction process and operation protection of waterproof junction box.

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