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IEEE Standard for Three-Phase, Manually Operated Subsurface Load Interrupting Switches for Alternating-Current Systems
Revision Standard - Superseded.
Requirements are given for three-phase group operated subsurface and vault load-interrupting switchgear with maximum ratings of 600 A and 38 kV, and for utilizing separable insulated connectors.
Definitions are given, and service conditions and ratings are discussed.
Design tests, production tests, and construction requirements are included.
This project will be to review and revise the current ANSI/IEEE C37.71 to be consistent with other standards in this group.
It will also include vault style switches.
There is currently no standard for vault style switches.
ANSI/IEEE C37.71 is typically followed for vault style switches, however there are operational and construction differences between vault and subsurface switches which need to be clarified.
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