Specification and model of the hottest Hancheng hi

Hancheng high voltage cable specification and model

Hancheng high voltage cable specification and model should be inlaid or mechanical clamping number

article source: kitten release time: 03:34:42

product brand kitten product model YJV production city Tianjin shipping city Tianjin total supply 111111 minimum starting order 200 product unit price 11 unit of measurement meter product details

Hancheng high voltage cable specification and model underground use copper core cable power supply with low rate and corrosion resistance, High reliability and convenient construction and maintenance. This is also the reason why copper cables are mainly used in underground cable power supply in China. The models and varieties of power cables mainly include the following aspects: models and product representation of 35kV and below power cables 1 Use Chinese Pinyin * capital letters to indicate the insulation type, conductor material, inner sheath material and structural characteristics. High voltage cable

wire and cable products used in the power system mainly include bare conductors for overhead transmission lines, bus bars (buses), power cables, and wires and cables for electrical equipment, mainly for electrical equipment. The output value of wires used in power system accounts for more than 60% of the total cable industry

power cable

power cable is a cable with high-quality insulating materials wrapped around the conductor and various protective layers. The function of power cable is to safely and reliably transmit electric energy of capacity for a long time. The power cable has the following characteristics:

(1)

it should be able to withstand high, even high, extremely high working voltage for a long time, and the cable should have very excellent electrical insulation performance

(2)

can transmit a large current (hundreds or even thousands of Amperes), so the cable should have good thermal aging (heat resistance) and heat dissipation

(3)

cables should have multiple protective layers to protect the insulation layer and meet the needs of various laying environments (underground, underwater, trench tunnel)

(4)

due to the changes of power system and electrical equipment, cables need to have many varieties and specifications to adapt to different transmission capacity, phase number, voltage and laying environment. There are also DC power cables for DC transmission systems

high voltage insulation technology, high current transmission and structural heat balance technology of power cables represent the academic level of various electrical equipment. 1. Usage: This product is suitable for transmission and distribution of energy in lines with AC 50Hz and rated voltage of 0.6/1kv

2. Product standard: gb12706. Copper core, aluminum core plastic insulated power cable and PVC insulated power cable with rated voltage of 35kV and below

3. Service characteristics: 1) the * * * rated temperature of cable conductor is 70 ℃. 2) In case of short circuit (the longest duration shall not exceed 5S), the * * * temperature of cable conductor shall not exceed 160 ℃. 3) The ambient temperature during cable laying shall not be lower than 0 ℃, and the minimum bending radius shall not be less than 10 times of the outer diameter of the cable

4. Model, name and scope of use

model name scope of use

vv VLV PVC insulated PVC sheathed power cables are laid indoors, in pipelines and tunnels

vy Vly PVC insulated polyethylene sheathed power cables are laid indoors, in pipelines and pipelines

vv22 vlv22 PVC insulated steel tape armored PVC sheathed power cables are laid underground, It can withstand external mechanical forces

vv23 vlv23 PVC insulated steel tape armored polyethylene sheathed power cable

5. Production range

model number of cores nominal section mm2

copper core aluminum core

vv vy - 11

- vlv vly 1 2.

vv22 vv23 vlv22 vlv23 1

vv vy - 2 1.

- vlv vly 2 2.

vv22 vv23 vlv22 vlv23 2

vvvy - 3 1.

- vlv vly 3 2.

vv22 vv23 vlv22 vlv23 3 2.

vv22 vv23 vlv22 vlv23 3 2.

vv22 vv23 vlv22 vlv23 3

vv vy VLV Vly 3+1

vv22 vv23 vlv22 vlv23 3+1

vv vy Vly 4

vv22 vv23 vlv22 vlv23 4

vv22 vv23 vlv22 vlv23 4

vv22 vv23 vlv22 vlv23 4 YJV is a cross-linked polyethylene insulated power cable with rated the voltage is generally 0.6/1kv, which is generally used in fixed laying occasions, while YC is a rubber insulated cable, with a rated voltage of 450/750v, which is generally used in mobile occasions, Pollution resistant YJV - cross linked polyethylene insulated PVC sheathed power cable is a plastic cable with hard texture, temperature resistance grade of 90 ℃, and high voltage grade from 1kV to 220kV. Suitable for fixed laying

yc - heavy rubber sheathed cable, rubber cable, soft texture, temperature resistance grade 70 ℃, voltage grade 450/750v, suitable for mobile laying. YJV XLPE insulated cable, with a voltage range of 10 to 35 kV, belongs to high-voltage cable, with a minimum wire diameter of 16 square meters, an ambient temperature of 25 degrees and a working temperature of 80 degrees; YC is an ordinary rubber cable, with a working voltage below 500 V, which can withstand large external mechanical forces, has weather resistance and certain oil resistance, with a minimum wire diameter of 2.5 square meters, an ambient temperature of 25 degrees and a working temperature of 65 degrees. YJV XLPE insulated power cable (XPE for short) is a plastic cable with hard texture, temperature resistance grade of 90 ℃, and high voltage grade from 1kV to 220kV. Suitable for fixed laying. There are high and low voltage: reference standard

gb/t

general expression: yjv-0.6/1kv

yjv-10kv

yc rubber sheathed cable rubber cable, soft texture, temperature resistance grade 70 ℃, voltage grade 450/750v, suitable for mobile laying

the referenced standard JB shielded twisted pair is divided into two categories, namely, STP (shielded twisted pair) and FTP (foil

twisted pair). STP refers to the shielded twisted pair with its own shielding layer for each line, while FTP adopts the shielded twisted pair with overall shielding. It should be noted that the shielding only works when the whole cable has shielding devices and both ends are properly grounded. Therefore, the whole system is required to be all components, including cables, sockets, water [1] crystal heads and distribution frames. At the same time, buildings need to have a good ground wire system. According to different shielding methods

the outer layer of shielded twisted pair cable is wrapped by aluminum to reduce radiation, but it cannot completely eliminate radiation. The price of shielded twisted pair is relatively high, which is more difficult to install than unshielded twisted pair cable. Similar to coaxial cable, it must be equipped with special connector supporting shielding function and corresponding installation technology. However, it has a higher transmission rate, which can reach 155mbps within 100 meters, which is higher than the corresponding unshielded twisted pair

1 type of shielded twisted pair. In the type name below, the slash/before is the total shielding layer, and after the slash is the individual shielding layer of twisted pair. S refers to wire, f refers to aluminum foil, and u refers to no shielding layer. 1.1 f/utp shielded twisted pair aluminum foil total shielded twisted pair (f/utp) is the traditional shielded twisted pair of Zui, which is mainly used to isolate the 8-core twisted pair from the external electromagnetic field, and has no effect on the electromagnetic interference between wire pairs

[2]f/utp twisted pair is wrapped with a layer of aluminum foil on the outer layer of 8-core twisted pair. That is, outside the 8 core wires, there is a layer of aluminum foil in the sheath, and a grounding wire is laid on the conductive surface of the aluminum foil. F/utp twisted pair is mainly used in Category 5, super category 5 and category 6. F/utp shielded twisted pair has the following engineering characteristics

>,>, the outer diameter of twisted pair is greater than that of unshielded twisted pair of the same grade;>,>, Both sides of the aluminum foil are not conductive layers, and usually only one side is conductive layer (that is, the side connected with the grounding wire);>,>, The aluminum foil layer is easy to tear when there is a gap. Therefore, the following problems should be paid attention to during construction

>, the aluminum foil layer should be terminated to the shielding layer of the shielding module together with the grounding wire;>,>, In order not to leave gaps where electromagnetic waves can invade, the aluminum foil layer should be expanded as far as possible to form a 360 degree contact with the shielding layer of the module;>,>, When the conductive surface of the shielding layer is in the inner layer, the aluminum foil layer should be turned over to cover the sheath of the twisted pair, and the twisted pair and the metal bracket at the rear of the module should be fixed together with the nylon tie attached to the shielding module. In this way, after the shielding shell is covered, no matter between the shielding shell and the shielding layer.> Or there is no gap between the shielding layer and the sheath where electromagnetic waves can invade

>,>, do not leave gaps on the shielding layer. 1.2 u/ftp shielded twisted pair the shielding layer of shielded twisted pair (u/ftp) is also composed of aluminum foil and grounding wire. The difference is that the aluminum foil layer is divided into four pieces, which wrap four pairs respectively, cutting off the electromagnetic interference path between each pair. Therefore, in addition to resisting external electromagnetic interference, it can also resist electromagnetic interference (crosstalk) between line pairs

u/ftp line pair shielded twisted pair is from class 7 twisted pair. At present, it is mainly used for class 6 shielded twisted pair, and can also be used for super class 5 shielded twisted pair. The engineering characteristics of the pair shielded twisted pair are as follows: therefore, the following problems should be paid attention to during construction:>,>, the aluminum foil layer should be terminated on the shielding layer of the shielding module together with the grounding conductor

>,>, the shielding layer should form a 360 degree contact with the shielding layer of the module;>,>, In order to prevent the core wire and shielding layer in the shielded twisted pair from being stressed, the twisted pair should be fixed with the metal bracket at the rear of the module with nylon ties attached to the shielding module at the sheath of the twisted pair

>,>, do not leave gaps on the shielding layer. 1.3

sf/utp shielded twisted pair the total shielding layer of sf/utp shielded twisted pair is aluminum foil + copper wire, which does not need the grounding wire as the drainage line: the copper wire has good toughness and is not easy to break, so it itself can be used as the drainage line of the aluminum foil layer. In case the aluminum foil layer breaks, the wire will continue to connect the aluminum foil layer

sf/utp twisted pair has no respective shielding layer on the pair of four twisted pairs. Therefore, it belongs to shielded twisted pair with only comprehensive shielding layer. F/utp twisted pair is mainly used in Category 5, super category 5, and also in Category 6 shielded twisted pair. The f/utp shielded twisted pair has the following engineering features:>,>, and the outer diameter of the twisted pair is larger than that of the f/utp shielded twisted pair of the same grade

>,>, both sides of aluminum foil are not conductive layers, usually only one side is conductive layer (that is, the side in contact with wire);>,>, The copper wire in the wire is easy to separate from the wire, causing a short circuit of the signal wire;>,>, The aluminum foil layer is easy to tear when there is a gap. Therefore, the following problems should be paid attention to during construction

>,>, the wire layer should be terminated on the shielding layer of the shielding module;>,>, The aluminum foil layer can be cut off without participating in the termination;>,>, In order to prevent the copper wire in the wire from escaping to form a short circuit of the core wire, pay special attention to observation during termination, and do not let any copper wire have the opportunity to end towards the module contact

specification and model of Hancheng high voltage cable is 3. Stranded wire: it is made of several bare wires twisted in a spiral shape according to certain rules. Including copper stranded wire and aluminum stranded wire for distribution lines; It has high mechanical strength. It is used as alloy aluminum stranded wire, steel cored aluminum stranded wire and copper clad steel stranded wire, aluminum clad steel stranded wire, steel cored aluminum alloy stranded wire and expanded aluminum steel stranded wire for avoiding corona for transmission lines in heavy ice areas or large-span occasions. High voltage cable 1. Power system

the products used in the power system mainly include overhead bare wires, bus bars (buses), power cables (plastic cables, oil paper power cables (basically replaced by plastic power cables), rubber sheathed cables, overhead insulated cables), branch cables (replacing some buses), electromagnetic wires and electrical equipment for power equipment

2. Information transmission system

local telephone cables, television cables, electronic cables, radio frequency cables, optical fiber cables, data cables, and electromagnetic cables are mainly used in the information transmission system