Typically when you place a thermal protector or thermal sensor, you assume you are NOT on one of those hot spots and that your highest winding temperature is 5-10 C higher than what your sensor tells you. Operators need to transfer coils wound by winding machines to coil inserting machine by manual, as well as the wedge papers. You can get hotspots on the windings and you generally won't know where those hotspots are located. Machine 'Copper Wire Coil Insertion Machine for Long Pump Motor Winding Inserting' is used for inserting electric coils and wedge insulation to stator slots automatically at one time. Raise the temperature high enough and it might fail in 2 hours or 1 hour or 10 seconds.Īssuming you can figure out a temperature, also keep in mind that motors don't heat up evenly. The wire will eventually fail at all these temperatures but the real question is when. The Horizontal type induction motor stator coil middle forming machine is applied to deep water pump motor and other various type of big dimension stator. And you could raise it another 10 degrees to 120 C and it still won't burn up right away. Automatic Horizontal type Electric motor stator coil winding forming machine copper wire middle shaping machine (1) Application. You could raise the temperature to 110 C and the wire won't burn up right away. That 20,000 hour temperature is used to rate the wire insulation.īut let's say the 20,000 hour temperature is 100 C. They measure the time in hours, plot the 3 points and then extrapolate the 3 points to the 20,000 hour temperature. They do this on 3 samples with 3 voltage and therefore 3 different temperatures. When wire manufacturers rate their wire, it is based off of an accelerated test where they apply a voltage in order heat up the wire. If you can determine the thermal class of the motor, then that will be the minimum that the magnet wire will be rated.Įven if you can figure out the rated temperature, that won't be the temperature that it burns up. A, B, F, and H are the most popular insulation classes and have rated temperatures of 105 C, 130 C, 155 C, and 180 C, respectively.
MOTOR WINDING COPPER WIRE CODE
It might be an actual temperature like "180 C" or it could be a letter code like A, B, F or H.
Your best bet is to look at the nameplate of the motor and look for an insulation class. MARVEL WIRES -Manufacturer & supplier of copper winding wire and annealed bare copper wire based in Roorkee,Uttarakhand,India.Offering winding wires are used in the construction of electric motors,transformers,inductors & electromagnets. You won't be able to tell what kind of insulation the magnet wire has by looking at it.
They can be rated for anywhere between 90 C and 240 C. As others have said, different types of magnet wire have different temperature classes of insulation.