How do waterproof joints do moisture-proof treatment

The switch of waterproof joint is mostly made of bullet proof glue and other high-grade materials, fire protection function, moisture-proof function, anti-impact function and so on are higher, appearance lubrication, should consider their own feel, with the feel of the switch began to determine the material, and ask the dealer. Generally speaking, the appearance is not too lubricated, feel thin, crisp products, the function is not trusted.



Nowadays, waterproof joint should be very wide, and it will also encounter a variety of problems in use, such as how waterproof joint moisture-proof? This is a problem that troubles many people, and Tony is here today to brief us, hoping to help us.



Substation waterproof joint box is an intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication and other equipment, which is generally installed on the spot beside the equipment. When the air is humid, especially in the dry season, the wet condensation water in the outdoor switch waterproof joint box is easy to lead to the decrease of DC secondary circuit insulation resistance to the ground, and in severe cases, the insulation resistance drops to zero, thus forming positive or negative DC power supply grounding. If DC is grounded at two points, it will cause DC insurance fusing, protection rejection or misoperation, and even damage the equipment, which seriously threatens the safe operation of the power grid. Dampness of the waterproof connector box will rust the screws and connecting pieces of the terminal block, resulting in poor contact of the secondary terminals. It will also cause heating and even open circuit terminals of the current loop, resulting in protection rejection or misoperation, leading to accidents. If the transformer voltage, switch and temperature signal terminals are in poor contact, the waterproof connector will be formed into measurement and control, abnormal operation of protection device, and wrong signal sending, leading to the operator's misjudgment and wrong analysis.



It is of great significance to find out and analyze the causes of damp in waterproof joint box and take measures to avoid accidents. The waterproof joint box of substation seems to be a simple accessory equipment, and its protection is often ignored. However, the current situation is that the terminal block of an appropriate part of the waterproof joint box in some substations corrodes very badly, which seriously affects the safe operation of the equipment. Therefore, it is very necessary to strengthen the selection of waterproof joint box, construction process management and operation protection.