IEEE C37.20.1-2026

Annotation of standard text IEEE C37.20.1-2026 :

Revision Standard - Active.

Metal-enclosed, low-voltage switchgear that contains either stationary-mounted or drawout-mounted, manually or electrically operated low-voltage ac or dc power circuit breakers or low-voltage ac definite-purpose switching devices in individual metal compartments, in three-pole, four-pole, two-pole, or single-pole construction is covered in this standard. Rated maximum voltage levels are 254 V, 508 V, 635 V, 730 V, or 1058 V ac; and 300/325 V, 600 V, 800 V, 1000 V, 1200 V, 1500 V, 1600 V, or 3200 Vdc. The preferred continuous current ratings of the main bus in ac designs are 1600 A, 2000 A, 3000 A, 3200 A, 4000 A, 5000 A, 6000 A, 8000 A, or 10 000 A. For dc designs, the preferred ratings are 1600 A, 2000 A, 2500 A, 3000 A, 4000 A, 5000 A, 6000 A, 8000 A, 10 000 A, or 12 000 A. The switchgear may also contain associated control, instruments, metering, protective, and regulating devices as necessary. The standard addresses service conditions, ratings, temperature limitations, classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and applications.

ISBN: 979-8-8557-2963-4, 979-8-8557-3569-7, 979-8-8557-3570-3

Number of Pages: 88

Product Code: STDAPE28529, STD28915, STDPD28915

Keywords: circuit breaker, control, cumulative loading, current transformers, drawout, IEEE C37.20.1™, indoor, instrumentation, load current-carrying, metal-enclosed, metering, outdoor, protection, stationary, switchgear

Category: Switchgear

Draft Number: PC37.20.1/D13, Dec 2025 - APPROVED DRAFT