Slot insulation

Slot insulation is the common name for shielding material used for the rotor inside a power generator. The slot insulation process for electric motors provides a barrier between the copper wirings and the steel lamination for all stator, armature and rotor products.[2] This shielding material separates the rotor's electrically conductive winding from its body.[3]

Custom "U" Slot Insulation with sidewall step [1]

Temperature ratings

Due to their operating environment, slot insulation must be capable of withstanding high temperatures. In the 1970s, slot insulation materials often had a Class F temperature rating (an operational range up to 155 °C).[4] Today, there are commercially available slot insulation materials with a Class H temperature rating (an operational range up to 180 °C)[5] Its composite of laminate materials, consisting of epoxy, aramid, and dielectric film, create its insulating properties.[6]

Notes
  1. Gerome Technologies U Slot Insulation
  2. "Slot insulation machines".
  3. Payne, B. (2010) The Unsung Hero of Power Generation? The Power Generation Blog.
  4. Gibney, J. GE Generators, An Overview. Archived 2011-01-02 at the Wayback Machine
  5. PCT. Generator Rotor Slot Insulation.
  6. Power and Composite Structures.

References


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