Views: 0 Author: Site Editor Publish Time: 2023-02-13 Origin: Site
Most of the switches of cable glands are made of bulletproof glue and other advanced materials, with high fire resistance, moisture resistance and anti-collision performance, and smooth surface. When purchasing, you should consider your touch feeling, preliminarily determine the material of the switch based on the touch feeling, and ask the dealer.
Here is the content list.
The operation rules of the cable gland
The maintenance of the cable gland
Precautions for use of cable gland 1. To ensure waterproof and longer operation, it is recommended to use a double wall glued heat shrinkable sleeve and insulating sleeve.2. To ensure a certain pressure at the joint, it is recommended to add a protective sleeve to strengthen insulation and protection.3. The self-adhesive tapes (or heat shrinkable waterproof tapes) used are high-voltage products to ensure insulation safety. 4. During construction, it is recommended to stagger the joints (that is, the cables do not need to be cut and butted neatly)
Most of the switches of cable glands are made of bulletproof glue and other advanced materials, with high fire resistance, moisture resistance and anti-collision performance, and smooth surface. When purchasing, you should consider your touch feeling, preliminarily determine the material of the switch based on the touch feeling, and ask the dealer. Generally speaking, the performance of products with less smooth surfaces and thin and brittle feel are not reliable.
Nowadays, waterproof joints should be very extensive, and various problems will be encountered in use, such as how to prevent moisture of waterproof joints?
Substation waterproof joint box is the intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication, and other equipment. It is generally installed next to the equipment on site. When the air is wet, especially in the rainy season, moisture condensation and ponding in the waterproof joint box of the outdoor switch are easy to cause the insulation resistance of the DC secondary circuit to the ground to drop. In serious cases, the insulation resistance drops to zero, thus forming the DC positive power supply or negative power supply grounding. If the DC two-point grounding is caused, the DC fuse will be blown, the protection will refuse to operate or misoperate, and even damage the equipment, which will seriously threaten the safe operation of the power grid. Moisture in the waterproof joint box will rust the screws and connecting pieces of the terminal block and make the secondary terminals in poor contact. It will also make the current circuit terminals hot or even open circuit, resulting in protection refusal or misoperation, resulting in accidents. Poor contact between transformer voltage, switch and temperature signal terminals will lead to abnormal operation of the waterproof connector, measurement and control, protection device, and false signal, resulting in misjudgment and wrong analysis by operators.
It is of great significance to find out and analyze the causes of moisture in the waterproof joint box and take measures to prevent accidents. The waterproof joint box of the substation looks like simple auxiliary equipment, and its management and maintenance are often easy to be ignored. However, the current situation is that the terminal strip of a considerable part of waterproof joint boxes in some substations is seriously rusted, which seriously affects the safe operation of equipment.
Therefore, it is very necessary to strengthen the selection, construction process management, and operation maintenance of the waterproof joint box. Ease Industries & Investment Co., Ltd. conducts many tests on cable glands for connection before they leave the factory, and the quality qualification rate is guaranteed. If you are in the cable gland, you can consider our cost-effective products.