Information on the concepts of protection of ac transmission 1ines is presented in this guide. Applications of the concepts to accepted transmission line protection schemes are presented as well. Many important issues, such as coordination of settings, operating times, characteristics of relays, mut...

Small power transformers have become a significant element in distribution systems supplying large commercial customers like major resort hotels and site-specific industrial customers that desire the local utility to own, operate, and maintain the serving transformer. These transformers can range in...

This standard defines the parameters to be used in the identification of contact wires used in transit systems and electric railways and railroads. This standard is intended for use in identifying contact wire by metallurgical content, electrical conductivity and agency ownership. This standard is n...

Methods for performing tests specified in IEEE Std C57.12.00 and other standards applicable to liquid-immersed distribution, power, and regulating transformers are described. Instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, spe...

Electrical and mechanical requirements for liquid-immersed distribution and powertransformers, and autotransformers and regulating transformers; single- and polyphase, withvoltages of 601 V or higher in the highest voltage winding, are set forth. This standard is a basisfor the establishment of perf...