Supplies

HV circuit breakers and GIS

Interconnect transformers do not energize a campus alone. HV breakers and GIS bays sit on both sides of every GSU and LPT position, and they now carry their own reference classes in the catalog: dead-tank and live-tank breakers from 145 to 550 kV, GIS bays for constrained sites, and a reconditioned schedule-rescue class. Every listing is a reference class quoted on request. This page is never a claim we stock breakers.

Browse the HV breakers / GIS catalog for kV class, interrupting rating, and continuous current per listing. GIS vs AIS, bay counts, and protection notes go on the RFQ. See also LPT specs and protection.