Enameled wire insulation strength test

Standards Of Enameled Wire includes
1）IEC 60317 for Europe
2）JIS C3202 for Asia
3）NEMA MW 1000C (inch) or NEMA MW 1000C metric (mm) for North America

The samples for tensile and thermal shock testing were 3 pieces of 254mm enameled wire.

First pull the enameled wire to the required elongation at a rate of 3.7-4.6 m/sec, then wrap the jerked sample around the mandrel, and then put the wrapped sample into the oven at the specified temperature for 30 minutes. It needs to be suspended in the oven. After leaving the oven, inspect the baked samples for cracking or peeling of the paint film. In this test, the diameter of the mandrel is usually 3 times the diameter of the enameled wire.

The specified temperature of the oven is set according to the temperature specified for the enameled wire of this ANSI Type in the NEMA MW1000 standard, which is usually the temperature grade of the enameled wire +20¡ãC.

Magnet Wire: enameled wire, winding wire, enamelled wire, magnetic wire, conductor covered
Type: copper winding wire, aluminum enameled wire
Application: motors, generators, transformers, and electric vehicles
Thermal Class: 130, 155, 180, 200, 220, 240

The AWG tables are for a single, solid and round conductor. The AWG of a stranded wire is determined by the cross-sectional area of the equivalent solid conductor. Because there are also small gaps between the strands, a stranded wire will always have a slightly larger overall diameter than a solid wire with the same AWG.

AWG magnet wire is also called enamelled manganin wire which is composed of copper or aluminum conductor with insulation materials, such as PE, EI, UE, etc. The enameled wire have different performance according to chemical performance, heat resistance and others.

The Flat magnet wire size:
155 modified polyester enameled rectangle wire: a: 1.00-5.00;b: 2.00-16.00
180 polyester imied enameled rectangle wire: a: 1.00-5.00;b: 2.00-16.00
220 polyester imied enameled rectangle wire: a: 1.00-5.00;b: 2.00-16.00
200 polyester imeid/polyamide-imide enameled rectangle wire: a: 1.00-5.00;b: 2.00-16.00

The round enameled wire size
155 modified polyester enameled aluminum round wire: 0.25mm – 2mm
200 polyester imeid/polyamide-imide enameled round copper wire:0.016-7mm

Water quality affects the production of lacquer wires?

The production water production water in the lacquered wire has a variety of uses, and like, the requirements for water quality are also different. Depending on the purpose of use, the water quality can be divided into: annealing furnace water seal water, equipment cooling water, lubricant manufacturing water, etc.

Submersible Winding Wire normally chooses the enameled copper wire with good performance
Longer life
Best Tensile Strength
Easy to Wind
Savings up to 25%

The enameled wire manufacturer takes you to understand the high-temperature paint wrap of high-temperature paint wires, and it is necessary to judge, whether its appearance, size, and performance meet the technical standards of the product and user technical agreements. After the measurement, test, the technical standards of the product and the technical agreement of the product are compared to the requirements for qualified products, which does not meet the requirements for unqualified products.

Round Enameled Wire is one of round wire, and single wire for using electric field. The testing performance of Round Enameled Wire is important, the application of enameled wire is in accordance with different performance.

After the product is manufactured, whether its appearance, size and performance meet the requirements of the technical standards of the product and the technical agreement of the user must be judged by the inspection beam and measured; the test shall be compared with the technical standard of the product or the technical agreement of the user and meet the requirements If it is qualified, otherwise, it is unqualified. Passing the inspection can reflect the stability of the enameled wire product quality, the material and the rationality of the process. Therefore, the quality inspection has the function of checking, preventing and identifying.

Silver plated copper wire is manufacture with the combination of silver and copper and Silver Plated Copper Electrical Wire is manufactured using grade copper and silver; the industrial standards are always kept into the consideration.

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.

Use a hydrogen-oxygen flame welding machine to weld the coil lead wires of electronic devices such as motors, motors, and transformers.

working principle:
Water is composed of hydrogen and oxygen. In a specific electrolytic cell, water can be decomposed into hydrogen ions and hydroxide ions. The hydrogen ions move to the cathode to generate hydrogen gas, and the hydroxide ions move to the anode to generate oxygen. Hydrogen is a fuel. Oxygen can be used to support combustion. It can be ignited by a specific hydrogen-oxygen flame gun to form a hydrogen-oxygen flame, which can quickly weld the enameled wire.

Application
? Oil-immersed transformer windings, Dry-type transformer, High temperature transformer,
? Motor, transformer, generator, welding machine; Sealed motor, Power tools motor, Auto alternators motor, Magnet coil, High power motor, household electro motors and micro-motors;
? Medium and large electrical motor and transformer windings;
? Power substations, rectifiers, f urnace transformer oil-immersed transformer coil winding;
? Lifting electromagnet, reactors and other low-voltage and high current electromagnetic winding;
? Used in aerospace, submersible motor and high voltage coil, wind turbines, micro-electronics and so on.
Windings with light weight, high conductivity, good heat resistance; Winding used for high frequency signal transmission
Magnetic wire used in High Frequency transformer, common transformer, inductance coils, electrometers.

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.

List 5 type of enameled wire characteristics
Acetal enameled wire
Polyurethane enameled wire
Polyester and modified polyester enameled wire
Polyesterimide/polyamide imide composite enameled wire
Polyesterimide/polyamide composite enameled wire

Wire enamel insulating varnish is a kind of paint that can produce a good insulation layer between the wires in the winding. It is mainly used for the outer layer of bare copper wire, alloy wire and glass wire covered wire of various wire diameters to improve and stabilize the performance of enameled wire.

Precautions for storage should be well packaged, should not be placed in a high-humidity warehouse, should not be exposed to direct sunlight, and should not be placed near acids, alkalis and organic solvents.

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 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 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.

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.

Best Selling 155 Class Enamelled Copper/Aluminum Winding Wire includes copper wire and aluminum wire used for transformers, inductors, motors, generators, dry type transformer, Cast Resin Transformers. Thermal Class:Class 155, popular used for low voltage dry type transformers.

Springiness of Round Enameled Wire is one of important performance in accordance with the IEC standards to ensure the quality of Round Enameled Wire. How to improve the performance, the article introduce how to operate the enameling machine, during the manufacturing process of enameled wire, the worker shoule be focus on some points.

The electrical insulation system for wires used in generators, electric motors, transformers, and other wire-wound electrical components is divided into different classes by temperature and temperature rise. The electrical insulation system is sometimes referred to as insulation class or thermal classification. The different classes are defined by NEMA, Underwriters Laboratories (UL), and IEC standards.

¡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.

Nomex covering corresponds to class H insulation is mainly used in the construction of condensers and capacitors. Main application of it is in shielding of cables in high temp. environments (200¡ãC) such as dry type transformers, military and aerospace cables. Nomex covered conductors are more effective in condition where temperature resistance and dielectric strength requirements are high.
Application of Nomex Paper Covered Aluminum wire :
Mobile Transformer,Traction Transfomers,Pole-mounted distribution transformers,Power substantions,rectifiers,oil-immersed transfomer coil winding.

The environmental painted wires of the lacquer formula contains the shortening project development time, saving project funding, and significantly improving the quality of the project.

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.

Insulation description: Enamelled / Fibreglass / Nomex / Paper / Mica
Applications: high-voltage coils, relays, transformers, hand tool motors, electronic coils, etc.
Temperature resistance grade: According to the selected bottom insulation wire, there are 130, 155, 180, 200, 220 degrees and other temperature resistance grades