Characteristics And Application Of Copper Clad Aluminum Enameled Wire

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Copper or aluminum pure

1. Conductor resistance ¡ª The resistance of a conductor is proportional to its length and inversely proportional to its cross-sectional area.
2. Conductivity¡ªBased on the resistance 1/58ohm (0.017241 ohm) of a standard soft copper wire with a length of 1m and a cross-sectional area of 1mm2 at 20¡æ, it is called 100% conductivity. The greater the resistance, the lower the conductivity, and the two are inversely proportional.
3. Bending resistance¡ªfix one end of the single wire, add weight to the other end to make it vertically downward, and then bend it back and forth 180 times until the wire breaks. The more bending times, the stronger the bending resistance.
4. Tensile breaking force¡ªthe maximum load weight or force applied to the specimen to break it during a tensile test.
5. Tensile strength¡ªthe breaking force per unit area to bear when the sample is broken during the tensile test.
6. Elongation ¡ª the ratio of the length of the sample after being stretched until it breaks to the original length at the specified standard distance. Conductors have different impedances at different temperatures.
Generally, 20¡ãC or 25¡ãC is the standard. The higher the temperature, the greater the impedance.

7 type of enameled wire in accordance with insulation materials, list the thermal class, advatanges and application per type of enameled wire. Enameled wire types also can be divided into copper magnet wire and aluminum wire in accordance with conductor.

Correspondence table of enameled wire diameter and resistance value
The resistivity of the copper wire ρ= 0.0172, the aluminum wire ρ = 0.0283, the wire resistance calculation formula:
R=ρ×L/S
(L = wire length, unit: meter, S = wire cross section, unit: mm^2)

The current mainly passes along the copper-clad aluminum wire on the surface of the wire, which is called the skin effect. The higher the frequency, the more obvious it is. The copper-clad aluminum wire uses this feature to save material. But its resistivity is slightly higher than that of pure copper wire, and the resistivity is also different with the thickness of the copper clad.

Paper Wrapped Aluminum wire Production Process

One step :
Take the pure aluminum material drawing into the aluminium rod wire;

Two step :
Through the extrusion production line, take the aluminum rod wire into extruding and coarse drawing operation, then becoming the requirement specification of Bare aluminium wire;

Three step :
Take up the Bare aluminum wire conductor, and inspection the bare wire coil products;

Four step :
Annealing the bare aluminum wire, and placed neatly, ready to production;

Five step :
Doing the digital dividing and cutting paper process and finished;
Pay-off the wire coil products, ready to paper covering production;

Six step :
Taking into straightening and tension lenvelling operation, ready to paper winding;

Seven step :
Taking into the paper winding operation, and then for inspecion;

Eight step :
Pulling the finished paper-covered wire, and then for take-up the wire coil , ready to packing.

After the temperature resistance level is exceeded, the insulation layer will age, melt and crack. The result is that the insulation capacity is greatly reduced, and it is prone to increased loss, short-circuit failure, etc.

1. Polyester enameled wire (P.E.W.)
Polyester enamel-covered wire is made of heat-resistant Terephthalic Polyester resin as the main grease as the insulating film and baked on the conductor. Its characteristics are as follows:
¡ñThe heat resistance is superior to synthetic tree (P.V.F.) enameled wire and U.E.W. enameled wire.
¡ñExcellent chemical resistance (except alkaline) and solvent resistance.
¡ñThe mechanical strength is comparable to synthetic resin (P.V.F.).
¡ñThe force rate and dielectric rate are comparable to U.E.W. enameled wire.
¡ñAlkali resistance and moisture resistance are better than synthetic resin enameled wire (P.V.F).

The temperature resistance of composite enameled wire can reach above 520 degrees.
Composite enameled wire is an ideal wrapping wire for large-scale low-voltage and high-current electrical appliances such as power oil-immersed, dry-type, special transformers, electric welding machines, reactor rectifiers, electromagnetic separators, etc., with excellent electrical performance and stability.

Enameled Aluminum Wire connects Enameled Copper Wire with the short service life according to the test. The contact part of the enameled copper wire and the enameled aluminum wire will accelerate the oxidation of the aluminum wire.

Anti-electricity-firecable wire
2. Aluminum winding wire
3. Three-layer extruded insulation wire

Paper covered wire by Electrical Aluminium Pole extrusion die by a certain size or drawn wire after annealing, and then in the aluminum conductor wrapped more than two or two insulating paper (including paper, telephone, cable paper, high voltage cable paper, turn insulation paper) of the winding wire, suitable for oil-immersed transformers and other electrical winding with a similar wire. Produced by the extrusion process electrical bare aluminum wire is wrapped production of the cable wire is the best material.

The space factors of magnet wires are compared in the right figure. The space factors of enamelled wires are superior to those of other wires for winding, as are their electrical properties. However, more careful examination must be made of the following properties as compared with other wires.

Enameled wire is coated with insulating paint on the outside of the bare Aluminium wire, constitute the inside due to the effect of insulating varnish, between the two adjacent wire can bear 200 v ac voltage Q general insulation flow line surface light, soft, can work under the condition of 130 ¡æ continuous.In addition, enameled wire bending also requires 10 times, paint should not fall off, in order to meet the winding when won’t appear the quality problem.

Paper-covered Aluminium magnet wire deliver excellent performance when used with oil such as transformer oil. A paper with a small hygroscopicity, mechanical strength, good permeability for oil, and high dielectric strength should be selected.

Application of Telephone cable paper covered insulated Aluminum magnet wire strip:
Paper covered Aluminum magnet wire is used in oil-immersed transformer and other similar electrical coil windings.

The enameled wire has always been a very important industry in the national economy, and with the continuous change and development of the market, the enameled wire industry is constantly adjusting, from the current perspective, the future of the entire enamel wire industry will move towards the future.

The glass in Glass Fibre Conductor may be applied in woven tape form or as a continuous fibre. It has proved to be an efficient insulation providing coil winders with thermal stability, adequate electrical properties and good resistance to abrasion after varnishing. The glass is bonded with a varnish to improve dielectric strength and mechanical properties.

Good Quality Paper Covered Flat Aluminum Enameled Copper Wire is made of bare copper wire or bare aluminum wire, or paper-covered wire as the core, wrapped with paper for insulation. According to customer and national standards, the conductor is wrapped with telephone paper, electromagnetic paper, and high-density inter-turn insulation paper. As conductor insulation, it is an ideal material for civilian-made oil-immersed transformers; especially semi-hard insulated copper wires, which can significantly improve the winding resistance. The mechanical properties and short-circuit resistance can be widely used in the winding of large and medium-sized transformers.

Advantages of oxide film wire
1. The oxide film is not sealed by insulating paint, and the temperature resistance can reach 250¡æ. The heat resistance of the oxide film sealed with insulating paint depends on the temperature index of the insulating paint;
2. High slot full rate, light weight and good radiation resistance.

Enameled Copper Coating Aluminum Wire refers to the wire with aluminium core as the main body and a certain proportion of copper coating on it. It can be used as conductor of coaxial cable and conductor of wire and cable in electrical equipment.Polyurethane enameled wire; thermal grade 130, 155, 180, 200. It is characterized by direct welding, good high frequency resistance, easy coloring and good moisture resistance.

The enamel wire is a wire having an insulating layer, which is a transformation of electromagnetic energy in a winding form, also known as a winding wire.

The samples for the dielectric strength test are also twisted pairs, and the number is 5 pairs. During the test, the voltage was applied at a boosting rate of 500V/S until breakdown, and the voltage at the time of breakdown was recorded. The requirements for dielectric strength in the NEMA MW1000 standard will vary according to different wire diameters, different paint film thicknesses, and different enameled wire types.

The voltage resistance performance of enameled wire is mainly affected by several factors:
1. The thickness of the insulating layer, not much nonsense;
2. The degree of aging of the insulating layer and the degree of baking affect the withstand voltage.
3. The quality of the insulation layer is mainly the pinhole performance.

What is called Magnet Wire? The magnetic wire is a copper wire with an enamel (a kind of paint ) coating on it, and used for transformer coils and motor coils. Copper wire is a conductor, like bare copper.

Electrical wiring to be run in conduit comes in individual strands, encased in insulation to protect the wire and insulate it from other wires and the conduit. Wires come in ither solid or stranded, depending on the wire size. Bare conductors are available for ground wires only. The insulation is made to take on some rather extreme conditions. Heat-, oil-, gasoline- and water-resistant coatings are all available to help your Insulated electric wire survive.

Wire Enamel Coating is important used for enameled wire or magnet wire, the application is used for transformer winding coils and motor coils forming insulation to prevent short circuits.

1060 Transformer Aluminum Strip Product Description:
060 transformer aluminum belt is a special purpose aluminum belt product produced for transformers. It uses high-purity aluminum substrate and aluminum deep-processed products formed by slitting aluminum coils with an aluminum content of more than 99.60%. The raw material of transformer aluminum strip is high-purity aluminum, which is rolled into thin sheet aluminum coils of different thicknesses and widths by a cold rolling mill, and then longitudinally slitted into aluminum strips of different widths by a slitting machine according to the application. It is an important raw material in industry. The main processing equipment of 1060 transformer aluminum strip is slitting unit, which can be divided into required length and width according to needs. Usually the transformer aluminum strip is slit according to the actual needs of the user, which can reduce waste, reduce processing procedures (without cutting), and save raw material costs.

In the long-term thermal aging test, three or more temperature points are usually selected for accelerated aging, commonly known as “three-point aging”.

The samples for the aging test are stranded enameled wire pairs. The production of the stranded pairs should meet the requirements of ASTM D2307 or NEMA 1000 standards, including the weight to be applied when making the stranded pairs, the number of twisted turns, the effective length of the stranded area, and The length of the two ends of the twisted pair, etc. When making a twisted pair, the required force and the number of twist turns will vary depending on the diameter of the wire. The effective length of the stranded area has nothing to do with the wire diameter, the effective length is 121¡À6 mm, and the two ends are at least 50 mm long. At least 10 twisted pairs per temperature point and mounted on twisted pair racks for high temperature aging test.

¡ñ Conductor resistance. Measure with a conductor resistance tester, and then change to the value at 20¡ãC for comparison.
¡ñInsulation destruction voltage. Twist two enameled wires, apply voltage between the conductors, and judge by the damage voltage of the paint film. This performance is analyzed and judged through two tests of normal state and cold state breakdown voltage.
¡ñPaint film continuity (pinhole). Check the small holes of the paint film with a certain length of the test material. The project is tested by a high-pressure paint film continuity tester.

There are some differences between polyester enameled wire and polyurethane enameled wire in terms of use occasions and performance:
Polyester enameled wire, composed of copper conductor and polyester resin, has a thermal class of 130, and after modification, the thermal class of the enameled wire is 155. It has good mechanical strength, paint film adhesion, excellent electrical, scratch resistance, chemical resistance, thermal stability and solvent resistance. It is widely used in various motors, electrical appliances, meters, telecommunications equipment and home appliances; the weakness of this product is poor thermal shock resistance and low moisture resistance.

Polyurethane enameled wire, thermal grade is 130,155,180. The biggest feature is that it has direct solderability, good high frequency resistance, easy coloring, and good moisture resistance. It is widely used in electronic appliances, precision instruments, telecommunications, and meters. The weakness of this product is that the mechanical strength is slightly poor, and the heat resistance is not high. , And the flexibility and adhesion of the production of large-size wires are poor, so the specifications of the product are mostly small and medium-sized wires.

What is the difference between magnet wire and enameled wire? Enameled wire is a type of magnet wire. but most people called the magnet wire in winding wire or enameled wire. Mostly used for Inductors, transformers, reactors, dry-type transformers, cast resin transformers