Tag Archives: power cables

On the basis of ensuring safety, the state has formulated certain indicators for wires and cables. Only when relevant indicators are met can they be called national standard wires. As for the allowable long-term working temperature of wires and cables, rubber insulation is usually 65 ℃, PVC insulation is 70 ℃ and cross-linked polyethylene insulation […]

Both YJV and BVV cables are suitable for outdoor street lighting and are also used to transmit electric energy. However, the models of these two cables are different. What are the differences in voltage, structure, characteristics and purpose? BVV cable: copper core PVC insulated PVC sheathed Du round cable (wire). YJV cable: XLPE insulated PVC […]

Power cables have long been widely used in our lives. The safety of their operation is related to our normal life and the safety of life and property. Therefore, the maintenance of cables is a vital work. The following small series will analyze what we need to know about the correct use of power cables. […]

The main difference between the two aluminum conductors is the material. AAAC for aluminum alloy strand and ACSR for steel cored aluminum strand. From the outside, the difference is not great. ACSR cable: steel core aluminum stranded wire Steel cored aluminum strand is made of aluminum wire and steel wire, which is suitable for overhead […]

Basic theory of cable medium 2.1 introduction whether electric energy or signal is transmitted by wires and cables, the purpose is to use it to transmit current to the power receiving equipment or power receiving end. To achieve this, a conductor is required to transmit the required load current. It is also important to keep […]

Fireproof wires and cables are the general name of wires and cables with fireproof performance. They are usually divided into flame-retardant wires and cables and fire-resistant wires and cables. For some designers just engaged in electrical design, it is essential to understand some cable characteristics in the industry. Let’s talk about the difference between flame-retardant […]

Basic structure The basic structure of power cable consists of core (conductor), insulating layer, shielding layer and protective layer. (1) Core The core is the conductive part of power cable, which is used to transmit electric energy and is the main part of power cable. (2) Insulating layer The insulation layer is to separate the […]

1. Reliable safety performance. The Alloy power cable has been strictly certified by UL in foreign countries and has been used in the United States, Canada, Mexico and other countries for 40 years without any problems. Based on the introduction of advanced technology from the United States, the alloy cable is independently developed and has […]

The Basic Structure of Power Cables The conductor is extruded and covered with an insulating layer, such as an overhead insulated cable, or several-core stranded (corresponding to the phase, neutral and ground wires of the power system), such as an overhead insulated cable with more than two cores, or an additional sheath, such as plastic/ […]

Bare conductor generally refers to conductive material without insulation and sheath. The main 3 types of conductors including AAC conductor, AAAC conductor and ACSR conductor. 1.All Aluminum Conductor (AAC) This bare concentric-lay stranded conductor is constructed with a straight round central wire surrounded by one or more layers of helically layed wires. These wires are […]

When the neutral point of the power supply of 1kV and below is directly grounded, the number of cable cores of the three-phase loop should meet the following requirements: 1.When the protective wire is connected to the exposed conductive part of the powered equipment and grounded, the following requirements shall be met: When the protection […]

Power cable is the backbone of power system, which is used to transmit and distribute large-scale electric energy. The rated voltage is generally 0.6/1kv and above. The control cable directly transmits the electric energy to the power supply connection of various electrical equipment and appliances, and its rated voltage is 450 / 750V. This makes […]

The main models of aluminum alloy cable are ZA-AC90(YJLHV60.YJLHV8), ZB-ACWU90(YJLHV62.YJLHV82), ZC-TC90(YJLHV). ZC-TC90 XLPE insulated PVC sheathed aluminum alloy cable AC90 changes the traditional sheath into interlocking armor. Acwu90 adds a layer of PVC protective sheath on the basis of AC90. The actual structure of tc90 is similar to that of traditional aluminum cable yjlv, and […]

Main technical requirements 1. Two core cable should be used in DC power supply circuit, and single core cable can be used when necessary. 2. PVC insulated cables should not be used in places with high temperature above 100 ℃ or low temperature below – 20 ℃. 3. When the cable is directly buried, when […]

In the actual parallel operation of cables, single core cables are more in parallel. Due to the influence of laying mode, the actual carrying capacity of single core cables may not meet the needs of actual loads, and overload may occur in actual use. In fact, when six cables are laid in the air in […]

The operation quality, safety and reliability of power supply system are not only related to the quality of wires and cables, but also to the construction quality of cable accessories and lines. 1. Cable laying method The cable laying methods are as follows: directly buried laying, pipe laying, shallow trench laying, cable trench laying, cable […]

1. What should be paid attention to in the process of cable loading and unloading? Answer: In the process of transportation and loading and unloading, the power cables and cable trays shall not be damaged. It is strictly prohibited to push the cable trays directly from the vehicle. Cables should not be transported and stored […]

1. Why is it necessary to install a return line parallel to the cable in the single-core cable jacket earthing mode? Answer: In the cable line that is earthed at one end of metallic sheathing, to make sure the inductive voltage in protecting a jacket does not exceed permitted standard, must install the conductor that […]

1.3 Type test The type test is mainly to determine whether the design of the cable product is Whether it meets the expected use requirements. Generally, it is a one-time test, and it is mostly destructive, including electrical performance, physical performance of the mechanism and various specific requirements. The test to verify whether the product […]

Conductor material of power cable Copper conductor shall be used for power cables used in the following situations Motor excitation, important power supply, mobile electrical equipment, etc. should be connected with high reliability circuit Working environment such as vibration place, explosion risk or corrosion to aluminum; Fire resistant cable Close to high temperature equipment Crowded […]

With the continuous acceleration of social development, the demand for electricity is increasing day by day. With the advantage of high power supply reliability, power cables are more and more used in the transmission and distribution domains. At present, cross-linked polyethylene (“XLPE“) insulated power cables are safe and convenient, and easy to operate and maintain. […]

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