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.