IEEE C37.74-2025

Current Revision
IEEE Standard Requirements for Subsurface, Vault, and Pad-mounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to and including 38 kV

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IEEE C37.74-2025

IEEE Standard Requirements for Subsurface, Vault, and Pad-mounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to and including 38 kV

PUBLISH DATE 2026
PAGES 70
IEEE C37.74-2025

Revision Standard - Active.

Required definitions, ratings, procedures for performing design tests and production tests, and construction requirements for subsurface, vault, and pad-mounted load-interrupter switchgear and fused load-interrupter switchgear for ac systems up to and including 38 kV are covered in this standard.

This standard applies to enclosed assemblies of single-phase and three-phase, dead-front and live-front, subsurface, vault, and pad-mounted, load-interrupter switches with or without protective devices such as fuses or fault interrupters, up to and including 38 kV rated maximum voltage.

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