The development prospects of cold shrinkable cable accessories installation in China
As we all know, the top priority of all major cable installation companies is the installation of cold shrink cable accessories. According to the current development trend, the installation of cold shrink cable accessories to replace the installation of heat shrink cable accessories has become a general trend and is popular. The installation of cold shrink cable accessories has increasingly replaced heat shrink and standard installation. There is a broad development prospect in China in the future! The reason is also because the installation of cold shrink cable accessories has incomparable advantages between heat shrink and standard:
First of all, the cold shrinkable cable accessories are installed with a covered semi-conductive shielding layer. The outer semi-conductive layer of the intermediate joint product is rubber injection molded and has a corresponding thickness, thus ensuring the performance of the outer semi-conductive layer and the safety of the entire joint. It has a unique stress cone control unit, and the product structure is designed with a built-in stepped stress cone, which makes stress evacuation more effective and the product operation more reliable. On this basis, the cold-shrinkable cable accessories also have the characteristics of simple installation process, no need for special tools, no need to heat with fire, just follow the installation instructions to complete the installation; wide universal range, one specification of product can be applied to a variety of cable diameters, easy to select and manage.
Secondly, the cold shrink cable has inorganic material properties, strong resistance to electrical corrosion, leakage and other electrical properties, and more reliable operation; the applicable temperature range is relatively wide, and it can maintain normal working condition at minus 55 degrees Celsius and 250 degrees above zero; the cold shrink cable accessories have excellent corrosion resistance and anti-aging performance and long service life, especially the very good conductivity, which can effectively evacuate the heat generated by conductor resistance and insulation material dielectric loss, thereby effectively extending the service life of the product; It has good hydrophobicity and can be used in a variety of environments, such as humidity, coastal salt spray, severe pollution, etc.; this type of product also has a large compressive force on the cable insulation, and the greater the interface pressure, the higher the interface insulation strength, and the smaller the partial discharge; due to the existence of continuous compressive force, cold-shrinkable cable accessories can also avoid thermal expansion and contraction when the cable is running and the breathing phenomenon caused by bending and soft movement, thus avoiding the phenomenon of creepage breakdown in the air gap between the cable and the accessory.
It is for these reasons that major power plants, substations, urban reconstruction and industrial and mining enterprises in China are increasingly choosing to use cold shrink cable accessories. The installation of cold shrink cable accessories has replaced heat shrink and standard cable accessories and has become the main force in domestic cable installation. The installation of cold shrink cable accessories will have good development prospects in China.
Comparison of price and quality of cold shrink cable accessories and heat shrink cable accessories
price comparison
1. Heat shrinkage is cheap. At present, heat shrinkage is most widely used in fields below 35KV. The 35KV level has gradually transitioned to cold shrinkage. The 10KV field and 1KV field are still widely used due to their low price.
2. Cold shrinkage is expensive. The current price of cold shrinkage is about 4-10 times that of heat shrinkage, or even more. However, from the perspective of long-term operating costs, more consideration can be given to choosing cold shrinkage above 10KV, especially above 35KV. Choosing cold shrinkage will reduce long-term operating costs.
Comparison in quality
1. The inherent shortcomings of heat-shrinkable cable accessories make the application of heat-shrinkable cable accessories hovering below the 35KV voltage level for a long time. At the 35KV voltage level, heat-shrinkable cable accessories have become an important reason for frequent accidents during cable operation.
2. The inherent advantages of cold shrink make the application of cold shrink cable accessories continue to develop towards high voltage. Currently, there are already 110KV cold shrink cable accessories.
Yichang Hengyuan Technology Co., Ltd. specializes in the production of European-style cable joints, plug-and-pull heads, cable branch boxes, American-style elbow joints, high-voltage vacuum circuit breakers, high-voltage load switches, arresters, zinc oxide arresters, tank arresters, over-voltage protectors, counters, monitors, heat-shrinkable cable accessories, Manufacturer of cold shrink cable accessories, T-heads, wall bushings, European cable accessories, American cable joints, transformer neutral point protection devices, fuses, isolating switches, PT cable heads, elbow cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products
