This project will develop a recommendation for specifying Thyristor Controlled Series Capacitor (TCSC) stations used in series with a transmission line. The document will address issues that consider ratings for TCSC thyristor valve assemblies, capacitors, and reactors as well as TCSC control characteristics, protective features, cooling systems, testing, commissioning, operation, and maintenance. Excluded from this document are detailed TCSC modeling considerations. There is currently no defined standard for specifying Thyristor Controlled Series Capacitor (TCSC) stations. This document will provide assistance and guidance to planning, substation, commissioning, and operation engineers in the course of specifying TCSC stations. Users of this document will find that they should tailor the recommendations provided when addressing specific project requirements. New IEEE Standard - Inactive-Withdrawn. Recommended practices for specifying Thyristor-Controlled Series Capacitor (TCSC) installations used in series with transmission lines are provided. Ratings for TCSC thyristor valve assemblies, capacitors, and reactors as well as TCSC control characteristics, protective features, cooling systems, testing, commissioning, training, documentation, operation, and maintenance are addressed.