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Introduction of control cables for power system


With the wide application of cables, there are more and more types of cables on the market today, which not only bring convenience to our lives, but also make economic development advance by leaps and bounds. Cable kvv and kvvr are two very common PVC control cables. They are favored by electric workers in the power system. In actual work, their safety performance is also very high. So, what are the characteristics of kvv and kvvr cables? Let's find out together.

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Main features of KVV cables
The kvv cable is a PVC control cable with a copper core PVC insulated PVC sheath, which can be divided into four structures: conductor, insulating layer, tape, and sheath. This type of wire belongs to multi-core wires, and kvv belongs to cables for electrical devices The control cable has good high temperature resistance, cold resistance and aging resistance. It is generally used in some fixed unshielded occasions such as indoors, cable trenches, pipelines, etc. where control and monitoring circuits and protection circuits are also used.

1. Basic characteristics of KVV cables

1. The implementation standard of KVV control cable GB9330-88
2. The long-term allowable working temperature of the core conductor is 70°C, and the ambient temperature when the cable is laid is not lower than 0°C
3. The number of cores that can be produced is 2-61 cores
4. Cable KVV and KVVR structure: conductor insulation layer with sheath
5. KVV control cables are widely laid in fixed places such as cities, cable trenches, and pipelines.
6. Common types of control cables are KVV, KYJV, KVVP, KVV22, ZC-KVV, NH-KVV, WDZ-KVV...

The role of different types of KVV cables
1. Flame-retardant Pvc control cables are suitable for industrial and mining enterprises, energy and transportation departments, and for control of AC rated voltage below 450/750 volts, adjacent to and protection of lines, etc. PVC insulated and PVC sheathed control cables.

2. Fire-resistant control cables have high fire-resistant performance, and within a certain period of time, no short-circuit and short-circuit faults will occur when they are directly burned by flames. This product is suitable for all kinds of occasions where the risk of fire is high and the importance of fire safety is high, and it is used as a connection line between electrical equipment and control systems.

3. The low-smoke and halogen-free control cable has a low smoke emission when heated, and is composed of thermoplastic or thermosetting material that does not contain halogen. It is suitable for use as a control connection line in places with dense personnel and low air density.

The meaning of the cable letters is as follows:
k: control cable;
The first v: insulating material polyvinyl chloride;
The second v: sheath material PVC;
r: flexible cable.

Kvvr is a copper core PVC insulated PVC sheathed flexible control cable. Compared with kvv cables, kvvr cables have a softer structure and can withstand greater mechanical stress and bending arcs. Therefore, they are suitable for use in rooms where soft conditions are required. Or lay in a non-shielded place with movement regulations in the room.

What is the difference between kvv and kvvr cables?
1. The kvv cable is a control cable with a copper core PVC insulated PVC sheath, while kvvr is a control flexible cable with a copper core PVC insulated PVC sheath.

2. The cores of the two types of cables are different. The cores of kvv cables are relatively hard, and the cores of kvvr cables are hard copper cores. The cores of kvvr cables are relatively soft and belong to soft copper conductors.

3. The two types of cables are suitable for different places. Although both are suitable for control lines or monitoring lines with their rated voltages and below, kvv cables are mostly laid and installed indoors, cable trenches, pipelines and other fixed non-shielding types. Occasions, and kvvr cables are mostly used in places where the room is required to be soft or laid in unshielded places where there are movement requirements in the room.