How to Test Electric Motor Windings Instructions

1.Remove all power from the motor and isolate the circuit. Tag the circuit breaker to prevent accidental restoration of power. Open motor housing to access windings.


2.Clean the windings and motor interior with shop air and inspect for any damage. Check winding insulation for cracks or brittleness.


3.Connect the probes to the ohmmeter and set the meter to a midrange setting. Touch the two leads together and make sure that the meter indicates continuity, or zero ohms.


4.Consult the motor schematic or a diagram of the motor's windings and use the meter to measure the resistance of the windings. Each winding leg should have some small resistance reading. The meter should not show an "open" or a "short" when a winding leg is measured.


5.Use the schematic and take readings of all of the windings. Write down each measurement and make comparisons when measurements are complete.

Kraft Paper Wrapped Wire

Product Name : Kraft Paper Wrapped Wire

Introduction：The annealed conductor of cable paper wrapped wire is extruded or drawn from oil-free copper rod or electrical round aluminum rod with certain specification mould. Then the copper or aluminum conductor is wrapped with two layers’ or more than two layers’ insulation paper including telephone paper、cable paper、high voltage paper、turn-to-turn insulation paper. 

The product is widely applied in oil-immersed transformers and other similar electrical instruments. The electrical bare copper or aluminum wire with extrusion process is the ideal material for cable wrapped copper or aluminum wire.

Standard：GB/T7672-2008

wholesale paper wire

The paper covered wireis the wire that oxygen-free copper rod or electric round aluminum rod with certain specification moldex truded or drawn from specific insulation material wrapped winding wire. Composite conductor according to requirements by the number of root winding wire or copper, aluminum wire is arranged by the specific insulating material around the package from the winding wire.

The paper covered wire is mainly used for winding oil-immersed transformers, reactors and other electrical devices.

Zhengzhou LP Industry Co., Ltd can provide high-quality paper covered wire with competitive price.

what is magnet wire

Magnet wire is used in the manufacture of electrical products in coils or windings of insulated wire. Also known as winding wire. Magnet Wire must meet the requirements of multiple use and workmanship. The former includes the shape, size, can short and long-term work at high temperatures, and in some cases subjected to centrifugal forces of strong vibration and high speed, tolerability corona and breakdown under high voltage, chemical resistance under the special atmosphere corrosion; the latter included wound and embedded line subjected to tensile, bending and wear requirements, as well as dipping and drying process of swelling, erosion and so on.

Magnet wire can its basic components, conductive wire core and an electrically insulating layer classification. Usually divided into wire, wrapping wire, paint surrounding the envelope and the inorganic insulating wire insulation materials and manufacturing methods based on an electrically insulating layer being used.

fiberglass wrapped enameled wire 180

Product Name : Fiberglass Wrapped Enamelled Wire

Introduction：Fiberglass wrapped enamelled wire is the premium copper or aluminum conductor to be enamelled, then to be wrapped with fiberglass. Then it is impregnated in compatible insualting coatings of thermal class, baked to make a whole between fiberglass, insulating coating and conductor. There are four thermal classes of 130、155、180、200. The product is widely applied in generators、electrical machines、electromotors and other similar electrical instruments.

Standard：GB/T7672—2008

enamelled copper wire technical data(二)

6. Taboo Substance
Taboo Substance: strong oxid, acid, alkali, heat

7. Safty Measures for Leak
Emergency Measures: inapplicable.
Emergency Personnel Safety: inapplicable.
Environment Protection: inapplicable.
Fire Fighting: inapplicable.

8. Carrying & Storage
Carrying Cautions: moistrueroof, light, no collision, no drop.
Store Cautions: store in hermetic and drafty below 45 ℃, no heat or sunshine.

9. Safty Measures
Respiration Protection: exhaust or safeguard apparatus against gas or dust when welding / peeling / melting.
Eye Protection: safty glasses.
Body Protection: respirator.
Hand Protection: safty gloves.
Others: waste copper wire can be recycled. 

enamelled copper wire technical data(一)

1. Chemical Product Identification
Chemical Name: ployurethane enameled copper round wire. 

2. Physical Properties
Color& Shape: yellow enameled copper round wire (red / blue / green if colored) .
Physical Data: copper 90%-99%, polyurethane resin 1%-10%. 

3. Harmful Notification
Approach: touch, swallow
Environmental Effect: insulation surface will resolve into CO2, Nx, NH3 when soldered. 

4. Emergency Measures
Touch: consult physician only when stabbed.
Swallow: throw up (consult doctors when in failure ) .

5. Combustibility Explosibility & Fire Protection
Flash Point: inapplicable. 
Burning Point: 700 ℃.
Flammability: inflammable.
Explosibility: inexplosible.
Fire Fighting Equipment: CO2 / foam / dry chemical fire extinguishing system, water or sand.

winding wire data

Paper Covered Wire

The paper covered wire is the wire that oxygen-free copper rod or electric round aluminum rod with certain specification moldex truded or drawn from specific insulation material wrapped winding wire. Composite conductor according to requirements by the number of root winding wire or copper, aluminum wire is arranged by the specific insulating material around the package from the winding wire.

The paper covered wire is mainly used for winding oil-immersed transformers, reactors and other electrical devices.

Zhengzhou LP Industry Co., Ltd can provide high-quality paper covered wire with competitive price.

The Production Progress Of Enameled Aluminum Magnet Wire

The Production Progress Of Enameled Aluminum Magnet Wire

Step1: Extrude & Draw

Step2: Stretch The Thread

Step3: Ultrasonic Clean

Step4: Panit

Step5: Toast

Step6: Spool

Spool of Enemaled Copper Wires

Aluminum Winding Wire

Aluminum winding wire is one of the main varieties of the winding wire. Zhengzhou LP Industry Co., Ltd can provide enameled aluminum winding wire which is composed of a conductor and an insulating layer.

Bare wire soften after annealing, and then several pain, finally bake. But it is difficult to produce that meet the standard requirements, but also to meet customer requirements. It is subject to raw material quality, process parameters, production equipment, environment and other factors. Therefore, the quality characteristics of enameled aluminum wire and enameled copper wire does not the same. But they are equipped with mechanical properties, chemical properties, electrical properties, thermal properties of the four properties.

magnet wire in motors & engines

Product quality of magnet wire in the motor is the key factor to determine the
quality of motor products. And in order to ensure the normal operation of equipment, people must have a high-performance magnet wire material to improve the working environment .

Main motor parts which are usually required insulating coating part is the rotor, the stator and the rotor magnetic wire. And the general use of conventional magnet wire is enameled wire.

That is to say, the insulting purpose is reached through surface paint coating
line. In general, solvent-based coatings have a significant impact on the environment and cause serious waste of resources and environmental pollution.

But with increasingly demanding of environment, people are constantly looking for an alternative way of painting. Powder coatings occupy an increasingly important position in electronic insulating material of the electrical motors, widely used inmotors and electronic products, high-voltage electrical appliances, automotive industries, as well as  aviation engineering and other fields.

But powder coating product  in the in magnet wire  insulation coatings field is still in its infancy. And it has little product variety and it has big difference comparing with polyimide products which is the representative of solvent-based  coatings in  overall performance. So this
is largely constrained the promotion and application of insulating powder coatings in the field.

rectangular copper magnet wire

u Production Scope(mm):

a:1—10mm  b:3—16mm

UL NO:E345303

u Production Types:

Class 155 Polyester Enameled Rectangular Copper Magnet Wire

Class 180 Polyamide-imide ＆Polyesterimide Enameled Rectangular Copper Magnet Wire

Class 200 Modified Polyester Enameled Rectangular Copper Magnet Wire

Class 200 Polyamide-imide Enameled Rectangular Copper Magnet Wire

Class 220 Polyesterimide Enameled Rectangular Copper Magnet Wire

How to Check Electrical Motor Winding

1.Remove all power from the motor and isolate the circuit. Tag the circuit breaker to prevent accidental restoration of power. Open motor housing to access magnet windings.

2.Clean the magnet windings  and motor interior  with shop air and  inspect for any damage.  Check winding  insulation   for cracks or brittleness.

3.Connect the probes to the ohmmeter and set the meter to a midrange setting. Touch the two leads together and make sure that the meter indicates continuity, or zero ohms.

   

4.Consult the motor schematic or a diagram of the motor's windings and use the meter to measure the resistance of the windings. Each winding leg should have some small resistance reading. The meter should not show an "open" or a "short" when a winding leg is measured.

5.Use the schematic and take readings of all of the windings. Write down each measurement and make comparisons when measurements are complete.

   

Zhengzhou LP Industry Co., Ltd can supply many kind of magnet wire for motors. The quality can be believed. If you have interest, please constant us. 

Very Fine Copper Wire

Unique advantage of Fine Rectangular Enamelled Copper Wire

Thickness: The least conductor thickness reach 0.025mm(AWG22);

Based on unique innovation on process technics and technology, the ultra-fine rectangular enameled copper wire obtains unparalleled mechanical and electrical performance,the thermal class reach 220℃.

Zhengzhou LP Industry Co., Ltd can provide this product with high quality and competitive price.

Polyester (imide)/ Polyamide-imide enameled aluminum wire

Polyester(imide)/ Polyamide-imide enameled aluminum wire, Class 200 

Model Number	Size Range	Thermal Class	Standard
Q(ZY/XY)LY-200 QZYLY-200 （Round）	1.15mm-8.0mm	200C	IEC,NEMA,JIS,GB
Q(ZY/XY)LY-200 QZYLB-200 （Flat）	a.1mm-6mm, b.3mm-16mm	200C	MW36-A, GB

Class 200 Enameled Aluminum Magnet Wire Product Features:
This product has:
High heat resistance, high softening breakdown, solvent resistance, high cut through performance, excellent film flexibility, excellent wear resistance and so on.
American UL certified products. Certificate No.: E345303

Class 200 Enameled Aluminum Magnet Wire Application Field:
The products can be widely used in dry-type transformer, oil-immersed transformer, high temperature transformer, sealed motor, power tools motor, auto alternators motor, magnet coil, high power motor etc.

Where to Buy Magnet Wire

As a China’s professional manufacture of magnet wire, Zhengzhou LP Industry Co., Ltd can provide different kinds of enameled wires, such as enameled round or flat aluminum wire, enameled round or flat copper wire, ultra fine rectangular enameled copper wire and so on. Zhengzhou LP Industry Co., Ltd can provide clients best products with best quality and best service.





Why do You Choose Zhengzhou LP Industry Co., Ltd

Zhengzhou LP Industry Co., Ltd is mainly located in the middle-end and the high-end market. The main product is enameled aluminum wire in which the round wire is more than flat wire in foreign market.

Advantage Product

1, The enameledround aluminum wire whose diameter is 6-8mm, because few Chinese factories can produce.

2, The ultra fine enameled cooper wire is the advantage product.

NOMEX Paper Covered Wire

NOMEX Paper Covered Wire is a kind of electric wire wrapping with NOMEX insulated paper from America DuPont .NOMEX insulating paper has good electrical, high chemical and mechanical integrity and its elasticity , flexibility, tear resistance , moisture resistance and abrasion resistance are very good. Because of its acid corrosion, it can be compatible with all kinds of varnish, sticky compatible mixture , transformer fluids, lubricating oils and refrigerants . Because NOMEX product is not easily digested , it will not be damaged by insects, fungi and molds . NOMEX products’ mechanical properties were not affected at a temperature no higher than 200 ℃. The product can maintain at least 10 years long, even if the continuous violence placed 220 ℃ high temperature.

NOMEX paper covered wire uses the bare extrusion aluminum as the conductor. It has better electrical properties and better mechanical properties , so it can replace the difficulty of making large enameled flat wire for transformers, lifting electromagnet , welding and other products windings.

NOMEX Paper CoveredWire is applicable to mobile transformers, traction transformers, pole-mounted distribution transformers, power substations, rectifiers, electric transformers and other oil-immersed transformer coil windings. Oil-immersed transformers using NOMEX wrapped magnet wire can bring many economic, environmental and safety benefits that can reduce weight, reduce the volume, reduce transformer oil, improve safety, reduce flammability of transformers, increase the capacity and reduce energy loss and so on.

How to Measure Enamel Wire Gauge

   Zhengzhou LP Industry Co., Ltd has been engaged in the production of enameled wire for many years. So it has accumulated a wealth of industry experience. Here let us take a look at some criterias of enameled wire.

An Important criteria is the appearance of enameled round wire or flat wire as follows:

    

Enameled round wire:

    When conductor nominal diameter d≤0.200mm, at a distance of three orientations of each of 1m, each measuring a diameter, according to three measured values, the mean value as the outside diameter.

    When conductor nominal diameter d> 0.200mm, 1m apart on two orientations, each orientation along the magnet wire week average 3 times the outer diameter measurement, recorded six measured values, the mean value as the outside diameter.

Enameled flat wire:

    Apart on each 100mm3 orientations wide and narrow sides of each measure scale 1, the average value of three measurement values ​​as wide and narrow sides of the shape scales.

Class 180 Enameled Aluminum Magnet Wire

Model Number	Size Range	Thermal Class	Standard
QZYLY-180（Round）	0.21mm-8.0mm	180C	IEC,NEMA,JIS,GB
QZYLB-180（Flat）	a.1mm-6mm, b.3mm-16mm	180C	IEC,NEMA,JIS,GB

Class 180 Enameled Aluminum Magnet Wire Product Features:
This product has:
High heat resistance, high softening breakdown, solvent resistance, high cut through performance, excellent film flexibility, excellent wear resistance and so on.
American UL certified products. Certificate No.: E345303

Class 180 Enameled Aluminum MagnetWire Application Field:
The products can be widely used in dry-type transformer, oil-immersed transformer, high temperature transformer, sealed motor, power tools motor, auto alternators motor, magnet coil, high power motor etc.

Fiberglass Covered Copper Magnet Wire

Fiberglass Covered Copper Magnet Wire Product introduction:


As the customers’ requirements, fiber glass covered cooper magnet wire equably wrapped with 1-2 layers alkali-free glass fiber, and compatible with the required temperature and compatibility bond paint for dipping, baking process, in order to make the glass fibers itself, glass fibers and the conductor into a whole. 

The insulation layer has a certain resistance to abrasion, adhesion, flexibility and high voltage. The fiber glass covered cooper wire has good thermal shock resistance and overload performance.

It generally applies to various winding wires of high & low, medium & large capacities electric motors and appliances.

Class 130 Enameled Aluminum Magnet Wire

Polyester magnet wire, class 130--Zhengzhou LP Industry Co., Ltd

Model Number	Size Range	Thermal Class	Standard
QZLY-130（Round）	0.21mm-8.0mm	130C	IEC,NEMA,JIS,GB
QZLB-130（Flat）	a. 1mm-6mm, b. 3mm-16mm	130C	IEC,NEMA,JIS,GB

Class 130 Enameled Aluminum Magnet Wire Product Features:
This product has:
High heat resistance, high softening breakdown, solvent resistance, high cut through performance, excellent film flexibility, excellent wear resistance and so on.
American UL certified products. Certificate No.: E345303

Class 130 Enameled Aluminum Magnet Wire Application Field:
The products can be widely used in dry-type transformer, high temperature transformer, sealed motor, power tools motor, auto alternators motor, magnet coil, high power motor etc.