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Ethernet transformer materials of enameled wire

2022-10-26 17:44:33      view:

      Enameled wire

  a. Enameled wire is painted on the outside of the thin copper wire to protect the copper wire from external damage, according to the number of layers of exterior paint to determine the enameled wire can withstand the voltage, currently commonly used enameled wire has 1 layer, 2 layers, 3 layers, 4 layers and other four layers of film thickness.

  Different enamel film material heat-resistant level is also different, commonly used three heat-resistant level: 130 ℃ (B level) (low-temperature enameled wire), 155 ℃ (F level), 180 ℃ (H level) and 200 ℃ (N level) (high-temperature enameled wire).


  The inspection of enameled wire usually includes the following aspects.

  b. Heat resistance test

  c. Voltage withstand test

  d. DC resistance test: usually selected a certain length to test its DC resistance.

  e. Wire diameter test: divided into "bare diameter test" and "with varnish test", "bare diameter test" when the varnish will be blanched with fire test.

  f. Pinhole test: This is to test whether the enameled wire has small holes in the outer skin, the more holes, the poorer the quality of the test wire, the smaller the voltage resistance. Usually this test requires the use of chemical reagents to assist in carrying out.

  g. Appearance test: according to the "appearance test standard" for inspection