Power cord usage requirements and structural features
1, the scope of application: AC rated voltage $number and the following power, lighting, electrical equipment, instrumentation and telecommunications equipment and the connection and internal installation line.
2, laying the occasion and manner: indoor and communication channels, Power Cord tunnels along the wall or aerial laying, outdoor aerial laying, pipe or plastic pipe laying, electrical equipment, instrumentation and radio installation, are fixed laying; the plastic sheathed power cord can be laid directly in the soil.
3, general requirements: economic durability, simple structure.
4. Special requirements
1 The outdoor laying, by the sun, rain and freezing conditions, Power Cord such as the impact of the requirements of the atmosphere, especially weather-resistant aging; In the cold areas have cold requirements;
2) in use, vulnerable to external damage or flammable, and oil contact with a lot of occasions should wear tube; when piercing, the power cord is subjected to a larger tensile force, Power Cord and there is a possibility of scratching, should take lubrication measures;
3 as the internal use of electrical equipment, when the installation position is small, should be a certain degree of softness, and require insulation core color separation, should cooperate with the corresponding connector terminals and plugs, so that the connection is convenient and reliable; for the electromagnetic requirements of the occasion, should use shielded power cord;
4 for high ambient temperature, the sheath rubber power cord should be used and the heat-resistant rubber power cord for special high temperature occasions should be applied.
1, Guide power cord Core: As a power, Power Cord lighting and electrical equipment internal installation, the priority is the use of copper core, a large cross-section of the wire should be used tight pressure line core; the conductor of a stationary installation is generally used in the 1th class (solid conductor) or class 2nd (twisted/compacted round conductor) conductor structure.
2, Insulation: insulating materials commonly used natural butyl benzene rubber, polyvinyl chloride, polyethylene, nitrile PVC complex, such as four kinds of heat-resistant power line using temperature 90 ℃ PVC.
3, sheath: sheathed materials generally have polyvinyl chloride, hardy PVC, Ant-Resistant PVC, Power Cord black polyethylene, neoprene rubber and other five.
Especially cold and outdoor aerial laying suitable for black polyethylene and neoprene sheathed power cord. In the case of external forces, corrosion, moisture and other environment, can be used rubber or plastic sheath power cord.
Second, rubber plastic soft power line use requirements and structural characteristics
1, the scope of application: mainly suitable for medium and light mobile electrical appliances (household appliances, electric tools, etc.), instrumentation, power lighting connection; the operating voltage is AC 750V and below, and most of them are AC 300C.
2, because the product should be used frequently to move, bend, twist, etc., it requires the power cord soft, stable structure, not easy to kink, and has a certain wear resistance; Power Cord plastic sheathed rubber power cord can be laid in the soil directly buried.
3, grounding line using yellow-green two-color line, the rubber power cord in the other core does not allow the use of yellow-green wire core.
4, when used for electric heating equipment power connection line, should be used as the case of braided rubber insulated cord or rubber insulated cord.
5. Simple and lightweight structure is required.
1, Guide Power cord Core: The use of copper core, the structure of the soft type, a number of strands twisted into a single strand; the conductor generally adopts the 5th class (bundle/stranded structure conductor) or class 6th (steel core aluminum-core insulated cable conductor structure) conductor structure.
2, Insulation: insulating materials commonly used natural butyl benzene rubber, PVC or soft polyethylene plastic.
3, the cable pitch multiple smaller.
4. The outer protective layer is woven with cotton yarn to avoid overheating and scald the insulating layer.
5, in order to facilitate the use, simplify the production process, Power Cord the use of three-core balance structure, can save production hours and improve production efficiency.
Third, shielding insulation power line use requirements and structural characteristics
1, shielding power line performance requirements: The basic same as not shielding the requirements of similar power lines.
2, due to meet the requirements of the shielding equipment (anti-interference performance), generally recommended for the medium level electromagnetic interference occasions; plastic sheathed rubber power cord can be laid in the soil directly buried.
3, shielding layer should be able to connect with the device has a good contact or one end of the grounding, and require the shielding layer is not loosened, continuous silk and not easy to scrape off the external material.
1, Guide Power cord Core: Some occasions to allow tin plating;
2, the shielding layer surface cover density should conform to the standard or satisfies the user request; The shield layer uses the tinned copper wire braid or the winding; if the shielding outside should add the extruding sheath, then the shield may use the soft round copper wire braiding or winding.
3, in order to prevent the wire core or the internal interference between line, Power Cord can produce each line core (or line pair) separate phase shielding structure.
IV. Shielding insulation power cord use requirements and structural features
1, general rubber sheath of the application of a wide range of electric power line, where the need for mobile connection of a variety of electrical equipment, general occasions can be applicable, including industrial and agricultural departments used in the electrical mobile Equipment connection.
2, according to the use of rubber power cord section size and with the mechanical force of the ability to divide light, medium, heavy three kinds. These three types of products have soft and pliable requirements, but light rubber power cord soft requirements are high, and lightweight, small size, can not withstand strong mechanical force; medium rubber power cord has a certain softness, Power Cord and can withstand considerable mechanical force; heavy duty rubber power cord has higher mechanical strength.
3, the rubber power cord sheath should be tight and a certain roundness. YQW, YZW, YCW type of rubber power cord suitable for use in the field (such as searchlights, agricultural electric plough, etc.), should be better weather-resistant aging performance.
1, Guide Power cord Core: The use of copper wire harness, the structure of soft type, large section of the surface allows paper bag, improve the bending performance.
2, insulation using natural butyl benzene rubber, insulation aging performance is good.
3, Outdoor products rubber using neoprene or chloroprene rubber mainly mixed rubber formula.
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