What Is an AC Cord?

Power cords are electrical wires that carry electrical current. The current transmission is usually point-to-point. Power cords can be divided into AC AC power cords and DC DC power cords according to the purpose. Usually AC power cords are wires with higher voltage AC power. Due to the high voltage, these wires require unified standards to obtain safety certification before they can be officially produced. The DC line basically passes direct current with a lower voltage, so the safety requirements are not as strict as the AC line, but for safety reasons, countries still require unified safety certification.

The structure of the power cord is not very complicated,

For home appliances, although only

Power cords are produced every day. Power cords need to be more than 100,000 meters a day, and 50,000 plugs. With such a huge amount of data, the production process must be very stable and mature. After continuous exploration and research and the approval of European VDE certification bodies, national CCC certification bodies, American UL certification bodies, British BS certification bodies, Australian SAA certification bodies, etc., the power cord plug has matured, let's introduce it as follows:

1.Power cord copper and aluminum monofilament drawing

The copper and aluminum rods commonly used in power cords are drawn with a wire drawing machine through one or more drawing die holes at room temperature to reduce the cross section, add length, and improve strength. Wire drawing is the first process of each wire and cable company. The main process parameter of wire drawing is the mold matching technology.

2. Monofilament annealing of power cord

Copper and aluminum monofilaments are heated to a certain temperature, and the recrystallization method is used to improve the toughness of monofilaments and reduce the strength of monofilaments, so as to meet the requirements of conductive cores for electric wires and cables. The key to the annealing process is to eliminate the oxidation of copper wires.

3. Stranding of power line conductors

In order to improve the flexibility of the power cord and facilitate the installation of the device, the conductive wire core is formed by twisting a plurality of monofilaments. From the twisting method of conductive wire core, it can be divided into regular twist and unregular twist. Irregular stranding is divided into bundle stranding, concentric re-stranding, extraordinary stranding and so on. In order to reduce the occupied area of the wire and reduce the geometric size of the power cord, the stranded conductor is also compressed, so that the popular circle can be changed into a semicircle, a sector, a tile, and a compacted circle. This type of conductor is primarily used on power lines.

4, power line insulation extrusion

Plastic power cords are mainly packed with solid insulation. The main technical requirements for plastic insulation extrusion are:

1) Bias degree: The bias value of the extruded insulation thickness is the main indicator of the degree of workmanship. Most of the product structure dimensions and bias values have clear rules in the specifications.

2) Lubricity: The outer surface of the extruded insulation layer requires lubrication, and it must not show poor quality problems such as rough appearance, burnt, and impurities.

3) Density: The cross section of the extruded insulation layer must be dense and robust, pinholes visible to the naked eye must be avoided, and the existence of air bubbles must be avoided.

5. Power line

Regarding multi-core power cords, in order to ensure the degree of molding and reduce the shape of the power cords, it is generally required to twist them into a circular shape. The twisting mechanism is similar to conductor twisting, because the twisting pitch is relatively large, and most of the twist-free methods are used. The technical requirements for cabling are: one is to avoid twisting of the cable due to the turning of the absolutely-shaped insulated core; the other is to prevent the insulation layer from being scratched.

General rubber plastic power cord

1. Scope of application: connection and internal of power, lighting, electrical devices, instruments and telecommunications equipment with AC rated voltage 450 / 750V and below

First, look at the quality certificate of home appliances <br /> If the quality of home appliances is qualified, then the quality of the power cords of home appliances should also be tested, and there will not be too many problems.

Plugs with four power cords

1. European plug Europe plug: also known as French standard plug and pipe plug. There are suppliers and suppliers specifications such as: KE-006 YX-002 and other countries and certifications: (D (Denmark); N (Norway) S (Sweden); VDE (Germany); FI (Finland); IMQ (Italy); KEMA (Netherlands); CEBEC (Belgium).
Product suffix: N / 1225
The power cord logo shows the code: H05VV F 3G 0.75mm ² :
H: mm ² logo

05: indicates the compressive strength of the power cord (03: 300V 05: 500V)
VV: the core insulation layer on the front V surface, and the back V represents the sheath insulation layer of the power cord. For example, VV is represented by RR as a rubber insulation layer, and VV is represented by N: neoprene;

technical standard

The selection of the power cord is based on some principles. The so-called incompatibility cannot be ruled out. Reflection is not fabricated out of thin air, and so is the power cord. Relevant requirements for quality and appearance are also implemented in accordance with the power cord certification requirements. The principles for manufacturing power cords are:

power cable

:

(1) According to the "Technical Code for Design of Power System Design" SDJ161-85 issued by the Ministry of

The selection of the cross section of the power transmission line requires the selection of the cross section of the DC power line;

(2) "Technical Code for Design of 110 ~ 500kV Overhead Transmission Lines" DL / T5092-1999;

(3) "Technical Guidelines for High Voltage DC Overhead Transmission Lines" DL436-2005.

Meaning of wire and cable specifications

RV: Copper core vinyl chloride insulated connection cable (wire).

AVR: Tinned copper core polyethylene insulated flat connection flexible cable (wire).

RVB: Copper core PVC flat connection wire.

RVS: Copper-cored PVC stranded connection wire.

RVV: Copper core PVC insulated PVC sheathed round connection flexible cable.

ARVV: Tinned copper core PVC insulated PVC sheathed flat connection flexible cable.

RVVB: Copper core PVC insulated PVC sheathed flat connection flexible cable.

RV-105: Copper core heat-resistant 105 ^. C PVC insulated PVC insulated connection flexible cable.

AF-205AFS-250AFP-250: silver-plated polyvinyl chloride-fluoride plastic insulation high temperature--60 ^. C ~ 250 ^. CConnect the flexible cable. ^[1]