IEEE C57.18.10a:2008

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.

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.