Development prospects of cold-shrinkable cable accessories installation in China
As we all know, the first X of all major cable installation companies is the installation of cold-shrinkable cable accessories. According to the current development trend, the installation of cold-shrinkable cable accessories to replace the installation of heat-shrinkable cable accessories is the general trend. Accessory installation has increasingly replaced heat shrink and standard installation, and it has a broad development prospect in China in the future! The reason for this is also because the installation of cold-shrinkable cable accessories has incomparable advantages over heat-shrinkage and standard:
First of all, the cold-shrinkable cable accessories are installed with a coated semi-conductive shielding layer, and the outer semi-conductive layer of the intermediate joint product is injection molded with a corresponding thickness, so as to ensure the performance of the outer semi-conductive layer and the safety of the entire joint. With a unique stress cone control unit, the product structure is designed with a built-in stepped stress cone, which makes stress evacuation more effective and product operation more reliable; on this basis, cold shrinkable cable accessories also have a simple installation process, no special tools, no need to use Fire heating, just follow the installation instructions to complete the installation; the general range is wide, a product of one specification can be applied to a variety of cable diameters, and it is easy to select and manage.
Secondly, the cold-shrinkable cable has inorganic material characteristics, strong electrical performance such as electrical corrosion resistance and trace leakage, and more reliable operation; the applicable temperature range is relatively wide, and the normal working condition can be maintained at minus 55 degrees Celsius and 250 degrees above zero instantaneously; Cold-shrinkable cable accessories have excellent corrosion resistance and anti-aging properties, long service life, especially very good electrical conductivity, which can effectively dissipate the heat generated by conductor resistance and dielectric loss of insulating materials, thereby effectively increasing the service life of the product; Good water repellency, it can be applied to a variety of environments, such as humidity, coastal salt spray, serious pollution, etc.; this kind of product still has a great pressing force on the cable insulation, and the greater the interface pressure, the higher the interface insulation strength, and the local The smaller the discharge; due to the existence of continuous compression force, cold-shrinkable cable accessories can also avoid the thermal expansion and contraction of the cable during operation, as well as the breathing phenomenon caused by bending and soft movement, thereby avoiding the air generated between the cable and the accessory. Creepage breakdown in the gap
It is for these reasons that major domestic power plants, substations, urban transformations, and industrial and mining enterprises are increasingly choosing to use cold-shrinkable cable accessories. The installation of cold-shrinkable cable accessories seems to have replaced heat shrink and standard, becoming a domestic cable. The main force of installation, cold-shrinkable cable accessories will have a very good development prospect in China after installation.
Comparison of price and quality of cold shrinkable cable accessories and heat shrinkable cable accessories
Price comparison
1. The price of heat shrink is cheap. At present, the most widely used heat shrink is in the fields below 35KV. The 35KV level has gradually moved to cold shrink. The 10KV and 1KV fields are still widely used due to their low prices.
2. Cold shrinkage is expensive. At present, the price of cold shrinkage is about 4-10 times or even more than that of heat shrinkage. However, from the perspective of long-term operating costs, more consideration can be given to cold shrinkage for more than 10KV, especially 35KV. Above, choosing cold shrinkage will reduce long-term operating costs
Contrast in quality
1. The inherent shortcomings of heat-shrinkable cable accessories make the application of heat-shrinkable cable accessories hovering below 35KV voltage level for a long time. At 35KV voltage level, heat-shrinkable cable accessories have become an important cause of frequent accidents in cable operation.
2. The inherent advantages of cold shrinkage make the application of cold shrinkable cable accessories continue to develop towards high voltage. At present, there are 110KV cold shrinkable cable accessories.
Yichang Hengyuan Technology Co., Ltd. is a professional manufacturer of European-style cable connectors, plug connectors, cable branch boxes, American elbows, high-voltage vacuum circuit breakers, high-voltage load switches, lightning arresters, zinc oxide arresters, tank arresters, overvoltage protectors, Counters, monitors, heat-shrinkable cable accessories, cold-shrinkable cable accessories, T-heads, wall bushings, European cable accessories, American cable joints, transformer neutral point protection devices, fuses, isolating switches, PT cable heads, elbows Manufacturers of type cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products
