IEEE C57.18-10-1998 (R2003) PDF Download

IEEE C57.18-10-1998 (R2003) is a standard that focuses on the practices and requirements for semiconductor power rectifier transformers. It specifically pertains to transformers that serve monocrystalline semiconductor diodes or thyristors, excluding applications such as welding equipment, static precipitators, high-voltage converters for dc power transmission, and low power applications like radio receivers.

The standard applies to dedicated loads that are rated single-phase 300 kW and above, as well as three-phase 500 kW and above. It specifies both usual and unusual service conditions for these transformers, or references other appropriate standards. It also provides routine tests that should be conducted on the transformers.

Additionally, the standard includes an informative annex that presents examples of load loss calculations for transformers when subjected to nonsinusoidal currents. These calculations are based on the calculations provided in the standard itself.