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How to Choose High Voltage Cable
Release time:
2022-01-29
We usually say that the high-voltage cable is actually one of the power cables. The components of the high-voltage cable from the inside to the outside are conductors, insulation, internal shielding, filling materials (sheath), and external insulation. Of course, sheathed high-voltage cables are mainly used for underground burial, only to transmit power cables between 1kv-1000kv, and are mostly used for power transmission and distribution. The product is suitable for fixed power transmission and distribution lines with AC rated voltage below 35KV, which can resist the pressure of high strength on the ground and prevent damage caused by other external forces. The long-term use temperature of the cable conductor is 90 degrees, and the cable conductor is short-circuited (below 5S for a long time)
We usually say that the high-voltage cable is actually one of the power cables. The components of the high-voltage cable from the inside to the outside are conductors, insulation, internal shielding, filling materials (sheath), and external insulation. Of course, sheathed high-voltage cables are mainly used for underground burial, only to transmit power cables between 1kv-1000kv, and are mostly used for power transmission and distribution. The product is suitable for fixed power transmission and distribution lines with AC rated voltage below 35KV, which can resist the pressure of high strength on the ground and prevent damage caused by other external forces. The long-term use temperature of the cable conductor is 90 degrees, and the temperature of the cable conductor is below 250 degrees when short-circuit (below 5S for a long time). So, let's learn how to choose a high-voltage cable together!
How to Choose High Voltage Cable
The wire surface markings of 1. high-voltage cables are in accordance with the standards, which helps to find the manufacturing plant in time when there is a problem in the use of the wire. Consumers must pay attention when buying wires. In addition, the wire surface must have the manufacturer's name, product model and rated voltage continuous identification. Consumers should pay attention to whether the name of the manufacturing plant, product model and rated voltage recorded on the certificate are consistent with the printed marks on the surface of the wire to prevent fraud.
2. the appearance of the wire of the high-voltage cable When buying the wire, there is no greasy feeling when the hand touches the wire. From the cross-section of the wire, the insulation or cladding thickness of the wire is uniform throughout the circumference. Pay attention to the smooth appearance of the wire, the insulation and cladding are not damaged, the logo is clearly printed, and the core is not eccentric. The thickness of the insulation or sheath is necessary.
The use specification of 3. high-voltage cables requires that the fixed wiring line adopts BV single-core wire through the tube. Be careful not to touch the wire when wiring, and do not touch the wire when decorating the room; please do not connect halfway on one route; put the wire into the electrical box (box), Do not touch the wire.
4. the conductor diameter of high-voltage cables When purchasing wires, if the conductor cross-section is small, the wire heating is easy to cause short circuit. It is recommended to use wires for household lighting circuits with specifications above 1.5 mm²; attention must be paid to whether the conductor wire diameter is consistent with the section indicated on the certificate. Electrical appliances with large power consumption such as air conditioners and microwave ovens should use wires with specifications above 2.5 mm².
Compared with oil-filled cables, cross-linked polyethylene cables do not require an oil supply system for cables with voltage levels above 110kV. Self-contained oil-filled cables or steel pipe oil-filled cables and cross-linked polyvinyl chloride cables can be selected according to specific conditions. The installation process is always required to be very clean and not wet. In addition, the thermal mechanical properties caused by the large volume expansion coefficient and small compression rate of cross-linked polyvinyl chloride remain to be studied, but the production and installation technology of the cable intermediate joint and cable terminal is complex, and purification measures are needed at the construction and installation site. At the same time, it must be carefully selected.
The above is how to choose high voltage cable, if you need to know more, you can contact us at any time!
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