Slot insulation
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Slot insulation is common name for the shielding material found inside a power generator's rotor. Specifically, slot insulation is what comes between the instances of electrically-conducive winding in a rotor and its body.[1] Due to their operating environment, the ability to withstand high temperatures is a foremost concern with regard to slot insulation. In the 1970s, much slot armor had a Class F temperature rating (an operational range up to 155°C).[2] Today, there are commercial available slot insulation materials that have a Class H temperature rating (an operational range up to 180°C)[3] Slot insulation generally gains its heat resistant capabilities from its construction of composite laminate materials made of epoxy, aramid, and dielectric films.[4]
Notes
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- Payne, B. (2010) The Unsung Hero of Power Generation? The Power Generation Blog.
- Gibney, J. GE Generators, An Overview.
- PCT. Generator Rotor Slot Insulation.
