As a type of high -voltage type, its purpose is to transmit power from ten kV to 35 kV areas, and the application of the main road transmission is relatively large.The factors for the selection of high -pressure cables are quite complicated, because there are quite a lot of types.As a cable itself, the high -voltage cable can be divided into aluminum core cables according to the material ...
High -pressure cable selection
1. Buried ground type means that high -pressure cables are placed directly underground (buried deeper deeper deeper deeper according to different geological conditions, generally greater than 0.7 meters).The use of buried land laying on the cable itself is high, and the armor cables with an external protective layer are suitable; for some unstable geological conditions such as swamps and selusive sand, you can also choose steel wire armor cables.(In fact, the armor cable we talk about is actually a combination that can be bent. It is characterized by hardness, different internal materials and conductors, and the metal sleeve has an insulating layer.) 2. Pipelines refer to high -pressure cables that will high -pressure cablesSet in the prefabricated pipeline.This laying method can easily cause the cable to overheat, resulting in power loss and a decrease in capacity. Therefore, it is more suitable for using plastic protective suite cables or nude armor cables.
High -pressure cable price
It is recommended to go to the physical store according to your budget and actual needs. Generally, different prices of the product models will be different, but you can go to the physical store to ask the sales staff to make a recommendation according to your actual situation.The price of the cable is about one meter of about one meter.
High -voltage cable load flow
Calculate the maximum safe load of the short distance line according to the material of the cable core wire, the aluminum core cable is 3-4 times, and the copper core cable is 7-8 times.For example, a cable of 150 square millimeters of copper core, 1050A (7 times) of the maximum load.Of course, the larger the cross section of the cable, the better, but it is not economical.
High -pressure cable head production
The first step is to peel the sleeve. There should be some detailed instructions for the protective cover.In addition, sufficient insulation must be guaranteed.There will also be corresponding tools for some special steel armor.
The second step is the grounding line of the welded shielding layer, remove the internal cubes of copper shielding layer and remove and apply welded.The ground -flat copper line is divided into three shares and tied to the copper shielding layer, and the tie -tie head is treated.The surface of the outer care section should be sealing the densely seal with sand to prevent water from penetrating into the cable head.When the shielding layer is separated from the two ground lines of the steel armor, the shielded floor ground line should be performed well.
High -pressure cable model
Copper core Na-YJV, NB-YJV, cross-linked polyethylene insulation polyvinyl chloride sheet A (B) refractory electric resistance cable can be laid in indoor, tunnels and pipelines required for fire resistance.Na-yjv22, nb-yjv22, cross-linked polyethylene insulating steel band armor, polyvinyl chloride sheet A (b) type of refractory power cable is suitable for buried land when there is fire resistance, and it is not suitable for laid in the pipeline.NA-VV, NB-VV, Polyvinyl chloride Insulation Polyvinyl chloride Acel A (B) refractory power cable can be laid in the indoor, tunnel and pipelines required for refractory resistance.NA-VV22, NB-VV22, Polyvinyl chloride insulating steel belt armor-mounted polyvinyl chloride sheet A (b) refractory power cable is suitable for buried land when there is fire resistance, and it is not suitable for laying inside the pipeline.

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