One way to assess how well insulation is performing is to model the asset with a capacitor and trend the corresponding measured capacitance values with time.
- Asset’s windings, ground, etc. = electrodes of a capacitor
- Insulation packed between uniquely energized parts of the asset = dielectric of a capacitor
Capacitance of an insulation system is sensitive to geometric changes in the system and significant changes to the composition of electrical insulating materials, such as:
- Severe winding distortion where the normal distance between the windings increases or decrease
- An oil filled bushing develops a leak, notable amounts of oil leaks out or moisture comes in
For the most accurate capacitance testing equipment rely on Protec, where you can always trust that our rental equipment is properly maintained and ready to perform the testing you need where and when you need it.