cable accessories

ZMS produces high-quality cable and cable accessories.

What is the Overhead Line Fitting? What is its Concept?

What are overhead line fittings?

Overhead line fitting is an accessory that connects and combines various devices in the power system to transfer mechanical and electrical loads or to play a protective role.
Overhead line fitting is an important part applied to the “power grid”, there are very many cross nodes in the power system of power transmission and distribution. Line crossings form a network, and each line crossing point needs to be fixed. There are many substations in the grid that form the intermediate nodes of the grid, and there are many power towers that support the main lines of the grid. The transmission of electrical energy requires conductor contact to be carried out and sufficient current-carrying area to be maintained at high power levels. That is, the grid equipment and conductors such as conductors ensure good and solid contact between.

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Do you know how to connect the cable lugs?

For the straight-line connection of cable lugs single-strand copper-core wires. First, cut the two wire ends to form a certain length of wire core, remove the surface oxide layer of the wire core, cross the two wire cores in an X shape, and twist each other 2 to 3 turns, Pull the straight head again.
When the general wire is connected to the terminal lugs, if it is a single-strand wire of 10mm2 and below, it needs to bend a circle at the end of the wire and connect it to the terminal. If it is a multi-strand copper wire of 4m㎡ or more, a terminal lug must be installed and then connected to the terminal.

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Must-see: The Use and Classification of Cable Insulators

Cable Insulator is a special insulation control, which plays an important role in overhead transmission lines. Mainly used for the connection of wires and cables. For example, 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 or ceramic, which is the insulator.

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35kv Cold-Shrinkable and Heat-Shrinkable Cable Accessories in Wind Farms

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.

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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.

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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

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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.

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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.

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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.

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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.

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