IEEE C37.123-2016 IEEE Guide for Specifications for High-Voltage Gas-Insulated Substations Rated 52 kV and Above

IEEE C37.123-2016 IEEE Guide for Specifications for High-Voltage Gas-Insulated Substations Rated 52 kV and Above. 4. Service conditions Usual and unusual service conditions are described in Clause 2 of IEEE Std C37.122, and Clause 2 of IEEE Std C37.100.1. The users should review these clauses for the unusual service conditions to determine if any apply to their system. If any of the actual service conditions differ from these normal (usual) service con- ditions, these should be specified in Annex A. 5. Scope of supply 5.1 General The user specification should clearly indicate what is to be supplied by the GIS manufacturer. It should also clearly indicate what is not to be supplied by the manufacturer, and the services that will be furnished by the user at the project site. The following is a typical scope of the equipment and services to be furnished by the user and the supplier. Annex A should be used to provide a detailed listing of the scope of supply. The user should indicate the application of the equipment (i.e., type of substation for which the GIS will be used). Project teams benefit from clear definition of project scope. This part of the specification defines the deliver- ables and the constraints for the project, and facilitates communication and cooperation toward the project goals. The deliverables are engineering studies and services, documentation, equipment supply, installation services, and testing services. The major constraints are as follows: a) Substation one-line diagram (including any applicable future provisions). b) Physical constraints for the GIS: areas and heights available for the GIS and definition of areas ex- cluded from use along with any construction access restrictions. These will include the locations of physical barriers like retaining walls and unmovable conduit or cable trough. c Direction of connected lines/cables. d) Any fixed locations for primary voltage terminations including phasing. ) Schedule for the project including time when the jobsite will be ready to receive equipment and any sequencing or outage planning restrictions that would change the normal progression of the work. ) IEEE C37.123 pdf download.