scope:

This standard applies to power apparatus bushings that have basic impulse insulation levels of 110 kV and above for use as components of oil-filled transformers and oil-filled reactors.

This standard does not apply to the following:

- High-voltage cable terminations (potheads)

- Bushings for oil circuit breakers

- Bushings for instrument transformers

- Bushings for test transformers

- Bushings in which the internal insulation is provided by a gas

- Bushings applied with gaseous insulation (other than air at atmospheric pressure) external to the bushing

- Bushings for distribution-class circuit breakers and transformers

- Bushings for automatic circuit reclosers and line sectionalizers

- Bushings for oil-less and oil-poor apparatus

- Bushings for dc applications