For electrical devices several tests are mandatory to prove the ability of the device. The tests ensure the required insulating distances between phases, across open switching devices or phase to ground under several environmental conditions of the test object. Therefore, electrical devices are stressed with standardized voltages, which depend on the rating of the device, typically are:
- Impulse voltage tests (lightning/switching)
- Power frequency voltage tests
- Partial discharge tests
- DC voltage tests
- Dielectric tests dry and wet
- Dielectric tests in climatic chamber
- Dielectric ageing tests
