enameled winding wire

3.1 Elongation:
The standard refers to GB/T6109, inspection method: stretch the instrument
Calculation method: ratio of (length after stretching-length before stretching)/length before stretching;

3.2 Snap off:
The standard is to pull at a speed of 2 meters per second to check that the paint film is not cracked,

3.3 Round rod winding:
Wrap the enameled wires of different specifications and the corresponding copper rods around ten times to check that the paint film is not cracked. The diameter of the copper rods refers to the requirements of GB/T6109;

3.4 Thermal shock: Put the winding enameled wire in an oven (hanging in the middle of the oven) for 0.5 hours. The temperature of the oven corresponds to the specification requirements of the enameled wire. Refer to GB/T6109. After the drying, check that the paint film is not cracked.

Resistance:
Take 1m of the enameled wire to be inspected, scrape off the paint film at both ends, measure the resistance of the enameled wire, the resistance measurement value should be within the resistance range of GB/T6109; the standard temperature is 20 degrees, the conversion formula: 20 degrees resistance/234.5+standard Temperature = actual measured resistance/234.5 + measured temperature;