IEEE C57.18.10a-2008

To develop a standard for transformers serving semiconductor power rectifiers employing monochrystalline semiconductor diodes or thyristors. Excepted applications are welding equipment, static precipitators, HVDC converters, and low power applications; such as radio receivers and other non-linear loads. The standard includes loads rated: single phase 300 KW and above and three phase 500 KW and above.

The purpose of this project is to correct errors and include missing definitions in the published document.

Amendment Standard - Inactive-Reserved. Amendment to IEEE Std C57.18.10-1998. This standard practice provides rating data, construction requirements, testing, and calculation methods for dry-type or liquid-filled semiconductor power rectifier transformers. These transformers supply nonsinusoidal load currents and are subject to higher harmonic load losses than standard power transformers. A number of examples illustrating harmonic loss calculations are presented in a reference annex.