MYJV series mining cross-linked power cable

MYJV series mining cross-linked power cable

Power cables are all used in the power system, so they are generally not classified into small categories, but are classified into series according to different insulation materials or structures.

The product series of power cables include:

1Due to the cheap price, good physical and mechanical properties, and simple extrusion process, polyvinyl chloride insulated power cables have average insulation performance. Therefore, it is widely used for manufacturing1Low voltage power cables of kilovolts and below are used for low-voltage distribution systems, with an annual output of over 100000 kilometers. If insulation materials with added voltage stabilizers are used, production is allowed6Kilovolt level cables.

2Cross linked polyethylene insulated power cables have good electrical properties, mechanical properties, and heat resistance due to the fact that polyethylene is a plastic with electrical insulation properties and becomes a thermosetting material after polymer cross-linking. In the past two decades, it has become the dominant variety of medium and high voltage power cables in China, which can be applied to6——330Among various voltage levels of kilovolts.

National standard copper core MYJV3 * 2.5+1 * 1.5mm YJV22-2 * 4mm

In recent years,1The cross-linking of kilovolt low-voltage cables has become a technological direction, and the key is to reduce the insulation thickness so that it can compete with polyvinyl chloride cables in terms of price.

3Insulated power cables impregnated with viscous oil1992Years ago, it was the leading product of medium voltage cables in China. This is the classic structure of power cables, which has a history of over a hundred years. It has a large margin of electrical and thermal performance and a long service life (still in use in China)1923Imported cables laid annually. However, due to multiple production processes, long cycles, and limited material sources, it has been replaced by cross-linked polyethylene cables.

4Oil filled cable is another structure of oil paper cable, which is wrapped with thin insulation paper and filled with low viscosity oil under pressure in the gap. Applicable to66——500Kilovolts. Since the 1960s, high-voltage cables have been used in China*The product has also been replaced by cross-linked polyethylene insulated high-voltage cables in recent years.

5Rubber insulated power cable is a flexible and movable power cable that is mainly used in situations where enterprises often need to change the laying position. Using natural rubber insulation, the voltage level is mainly one thousand volts, which can be produced6Kilovolt level.

6An overhead insulated cable is essentially an insulated overhead conductor, and as it is still installed on a pole, its insulation design margin can be smaller than that of a power cable. Insulation can be made of polyvinyl chloride or cross-linked polyethylene. Usually made as a single core, but it can also be3——4A bundle of insulated cores twisted together without a sheath is called a bundled overhead cable.

Requirements for fixed installation of high-voltage cables:

(1) PVC insulated thick steel wire armored PVC sheathed power cables and cross-linked polyethylene insulated thick steel wire armored PVC sheathed power cables should be used in vertical shafts or tunnels with an inclination angle of 45 ° or more.

(2) In horizontal tunnels or shafts with an inclination angle of less than 45 °, PVC insulated steel strips or fine steel wire armored PVC sheathed power cables, cross-linked ethylene steel strips or fine steel wire armored PVC sheathed power cables should be used.

(3) Aluminum core cables can be used in the air intake inclined shaft, underground parking lot and its vicinity, and between the central substation and the mining area substation; Copper core cables must be used in other locations.

(4) Fixed low-voltage cables should use Mw armored or unarmored cables or mobile rubber sheathed flexible cables of corresponding voltage levels.

(5) Non fixed high and low voltage cables must use rubber sheathed flexible cables that comply with the Mr818 standard. Mobile and handheld electrical equipment should use rubber sheathed cables.

(6) Cables used for lighting, communication, signaling, and control should be armored communication cables, rubber sheathed cables, or M, factory, factory type plastic cables.

(7) Aluminum cores should not be used for low-voltage cables, and aluminum cores are strictly prohibited for low-voltage cables in mining areas.

Address: Liuyanma Industrial Zone, Dacheng County, Langfang City, Hebei Province

MYJV series mining cross-linked power cable