Wires and cables are ubiquitous in our lives, and they play an important role in power systems and automation control systems. Among the many wires and cables, PVV and RVV wires are significantly different due to their characteristics and uses. This article will introduce the differences between PVV and RVV wires in detail to help you better understand the characteristics and usage scenarios of these two types of wires and cables.
1. PVV wire.
The full name of PVV wire is PVC insulated PVC sheathed power cable, which is mainly used for fixed laying indoors, cable trenches, tunnels, and used as transmission lines. The structure of a PVV wire is divided from the inside to the outside into a conductor, an insulating layer, and a sheath, with the conductor mainly transmitting current, the insulation layer providing electrical insulation, and the sheath protecting the wire from mechanical damage.
1.Conductor: The conductor of PVV wire is usually made of multi-strand copper wire, which has good conductivity.
2.Insulation: Polyvinyl chloride material is used, which has good electrical properties and heat resistance, and can maintain stable electrical performance in a wide range of temperatures.
3.Sheathing: Polyvinyl chloride material is used to protect the wire from mechanical damage. The color of the sheath varies according to the voltage level, such as black for 380V and dark blue for 10kV.
2. RVV wire.
The full name of RVV wire is PVC insulated PVC sheathed flexible cable, which is a kind of movable power cable, which is mainly used for indoor and outdoor fixed installation occasions of various overhead or cable trench laying. The structure of RVV wire is similar to that of PVV, but it has greater flexibility and can be bent at will without being easily damaged.
1.Conductor: The conductor of the RVV wire is also made of multi-strand copper wire, which has good conductivity.
2.Insulation: Polyvinyl chloride material is used to provide electrical insulation. Since RVV wires often need to be bent for use, their insulation layer has a certain flexibility.
3.Sheath: Same as PVV, the sheath of RVV wire is also made of PVC material to protect the wire from mechanical damage. Since the RVV wire needs to be used on the move frequently, its sheath also has a certain flexibility.
3. The difference between PVV and RVV wires.
1.Uses: PVV wires are mainly used for fixed laying and as transmission lines; While RVV wires are mainly used in movable occasions, such as mechanical equipment, automation equipment, etc.
2.Structure: The structure of PVV wire is relatively simple, consisting of a conductor, an insulating layer and a sheath; Whereas, RVV wires are structurally similar to PVV, but have greater flexibility and can be bent at will without being easily damaged.
3.Performance: PVV wire has good electrical performance and heat resistance, and can maintain stable electrical performance in a wide temperature range; In addition to electrical performance, RVV wire also has strong flexibility and wear resistance, which can adapt to various bending and moving use scenarios.
4.Application scenario: PVV wire is mainly used for indoor, cable trench, tunnel and other fixed laying occasions; RVV wires are widely used in various indoor, external fixed or mobile installation occasions, such as mechanical equipment, automation equipment, elevators, household appliances, etc.
Summary: Although PVV and RVV wires are both PVC-insulated power cables, there are significant differences in use, structure, performance and application scenarios. Understanding these differences helps us better select and use these two types of wire and cable to meet different electrical engineering needs. In the future, with the continuous progress of electrical technology and the continuous expansion of application fields, PVV and RVV wires will continue to play an important role.