The development of new energy in China is now on the fast track, and wind power generation accounts for a significant share of it. Many wind farms are built on the grasslands of Inner Mongolia, and the 35kV collector lines of wind farms are laid using direct burial cables to protect the grassland vegetation and the overall appearance of the grassland. From the operation situation, the cable intermediate head has the phenomenon of discharge.
cable accessories
ZMS produces high-quality cable and cable accessories.
How Important are Cold-Shrinkable Cable Accessories in the Cable Line?
Cold-shrinkable cable accessories are a kind of prefabricated cable accessories that can be constructed at room temperature without heating. The cold-shrinkable power cable accessories are made of imported liquid silicone rubber. After installation, they always maintain a proper radial pressure on the cable body. The interface characteristics are relatively good, and there will be no creepage breakdown due to cable operation. The stress control part is integrated with the main insulation, which effectively solves the problem of electric stress concentration at the outer shielding section of the cable and ensures reliable insulation. It is a very important cable accessory.
Common Causes Of Cable Termination Heating
1、High Voltage Cable Termination Structure and Insulation Mdium
1.1 Overall Structure
High-voltage cable terminations can be divided into porcelain sleeve type, composite sleeve type, integral prefabricated type, GIS termination, etc. Their core structure is similar. The description here is based on the ceramic sleeve type cable termination structure as an example.
Figure 1 Typical structure of porcelain sleeve type cable termination
1—Outlet fittings, 2—Wiring post, 3—Shield cover, 4—Insulation filler, 5—Porcelain sleeve, 6—Stress cone protective cover, 7—Stress cone, 8—cone support, 9—support insulator, 10— Tailpipe
Briefly Describe the Basic Knowledge of Cable Accessories
Cable accessories refer to the intermediate connections and terminal connections of various cables in the cable line, which together with the cables form a power transmission network. With the continuous development of cable manufacturing technology, cable accessories have gone through several stages, such as cast cable accessories, wrapped cable accessories, heat shrinkable cable accessories, prefabricated cable accessories and cold shrinkable cable accessories. At present, the most widely used are heat shrinkable cable accessories, prefabricated cable accessories and cold shrinkable cable accessories. Next, let’s take a look at it in detail.
Can the Waterproof Piercing Clamp be Used Directly Under Water?
It should be said that the piercing clamp is a relatively large choice in the implementation of the current cable and wire branching program. However, in many branching programs, most people will have a question in their minds, is the piercing clamp waterproof? Can the waterproof piercing clamp be directly buried or used underwater? Let’s take a practical case for analysis.
Common Faults And Treatment Of High-Voltage Electrical Equipment
Common Faults And Treatment Of High-Voltage Electrical Equipment
The focus is on the failures and solutions of 10kV circuit breakers (vacuum, sulfur hexafluoride), disconnectors, busbars, transformers, transformers, cables and arresters. Engineering and technical personnel can refer to this article to analyze and process the accidents of high-voltage electrical equipment to ensure the safe operation of electrical equipment, reduce the impact of accidents, prevent problems as much as possible, and eliminate accidents in the bud.
According to the regulations, the voltage above 250 volts is called high voltage. Here we are mainly talking about 10 kV complete sets of equipment: that is electrical switchgear, metering cabinets, capacitor cabinets, etc. It also includes incoming and outgoing wires and transformers.
Must See! Do You Know The Advantages Of Composite Insulators?
Composite insulators can effectively use narrow corridors to open voltage and transmit electricity, and are suitable for technical transformation of urban network. They can reduce the height of poles and towers and save a lot of manpower, material resources and financial resources. Due to the high bending strength of composite material insulators, it can prevent the cascading fracture accidents that are prone to porcelain cross arm, and it is an irreplaceable product for porcelain cross arm. In addition, the composite insulator is small in size, light in weight, shockproof and impact resistant, and does not require manual cleaning, which provides a guarantee for safe operation.
What are the Functions of Electricity Insulators？
A lot of disk-shaped insulators are hung on one end of the high-voltage wire connection tower to increase the creepage distance, usually made of glass, ceramic or composite materials, called electricity insulators.
In order to prevent dust and other pollution from adhering to the surface of the insulator, a path is formed to be broken down by the voltage across the insulator, that is creepage. Therefore, increase the surface distance, that is the creeping distance, and the distance along the insulating surface that is the leakage distance is called the creeping distance. Climbing distance = surface distance / the highest voltage of the system. Depending on the degree of pollution, a crawl distance of 31 mm/kV is generally used in heavily polluted areas.
What are the Advantages of Cold Shrink Cable Termination?
The Difference Between Cold Shrink Termination and Heat Shrink Termination:
1. The difference between the ground wire connection methods: Cold-shrinkable cable accessories use constant force springs. The heat shrinkable cable accessories need to be soldered when using a ground wire.
2. The difference of the shrinkage method: The plastic support strip of the core part of the cold-shrinkable cable accessory shrinks naturally. The heat-shrinkable cable accessory needs to be heated by fire to shrink the low-voltage cable termination.
Why Use Ring Terminal Lug with Insulation?
Ring Terminal Lug With Insulation: Simple Installation, Cheap Cable lug is often used for cable end connection and continuation. Which can make the connection between cable and electrical appliances more firm and safer. It is a common material for building, electrical equipment, electrical connection and so on. Generally, when the wire is connected with the … Read more