1.1 General This test is applicable to enamelled round wire and bunched wire. Solderability is expressed by the time of immersion of the specimen in a solder bath required to remove the coating and to coat the conductor with solder.…
Test16: Resistance to refrigerants
1.1 General This test is applicable to enamelled round wire. Resistance to refrigerant is expressed by the quantity of matter extracted from the coating of the wire and by the breakdown voltage after exposure to a refrigerant. NOTE 1 The…
Test 12: Resistance to solvents
1.1 General This test is applicable to enamelled round wire with a nominal conductor diameter over 0,250 mm and to enamelled rectangular wire. The test is not suitable for round wires with a nominal conductor diameter up to and including 0,250 mm.…
Test 4: Dimensions of enameled winding wires
For definitions, general notes on methods of test and the complete series of methods of test for winding wires, see IEC 60851-1. Round and rectangular wire The equipment used shall have a precision better than 2 µm. If a…
Test 5:Electrical Resistance Of Enameled Wire
1. General notes on methods of test Unless otherwise specified, all tests shall be carried out at a temperature from 15 C to 40 C and a relative humidity of 25 % to 75 %. Before measurements are made, the…
Bare wire annealing
Annealing is a process at high temperature which aim to soften the copper and make it more malleable. The purpose of annealing is to make the conductor hardened by the lattice change during the mold stretching process to be heated…
Physical Varinishing process of enameled wire
Varinishing process is the process of applying enameled wire paint to metal conductors to form a uniform paint layer with a certain thickness. 1) Viscosity When the liquid flows, the molecules collide with each other to make one layer of…
Felt Varinishing process of enameled wire
The Felt Varinishing method has a simple structure and is easy to operate. As long as the felt splint is used to flatly clamp the felt on both sides of the wire, the felt is loose, soft, elastic and porous…
Varinishing times of enameled wire
The number of varinishing times is affected by the solid content, viscosity, surface tension, contact angle, drying speed, coating method, and paint thickness of the paint liquid. Generally, enameled wire enamel needs to be painted and baked several times to…
Baking process of enameled wire – temperature distribution
Baking process of enameled wire – temperature distribution The distribution of oven temperature has a great relationship with the baking of enameled wire. The distribution of oven temperature has two requirements: longitudinal temperature and transverse temperature. The longitudinal temperature requirements…