Industrial Electrical Engg Company

Established since 1921

Commutator Mica Sheet (Segment Plate)

Screen Shot 2015-03-05 at 5.53.51 pmCommutator Micanite Sheet consists of layers of chip loose Mica splittings bonded with resins to form a hard rigid plate. It is sanded and thereafter it is supplied as per close thickness tolerance of the users. This plate has very good die-electric strength. It is used for the manufacture of commutator segment insulation field coil separators. It is manufactured in two different classes of insulation.

  • Class “F”: Class “F” insulation is suitable where the Temperature goes up to 155º C.
  • Class “H”: Class“H” insulation is suitable where the Temperature goes up to 180º C.

Physical Requirements of Built-up Mica:

  • Reinforcing Material : NONE
  • Nominal Thickness (MM) : 0.25, 0.40 or above.
  • Tolerance Average : + 0.03, + 0.05.
  • Bond Content Maximum Percent: 7 percent
  • Breakdown Strength KV/MM : 20KV.


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