IEEE C37.20.4-2001
IEEE Standard for Indoor AC Switches (1 kV - 38 kV) for Use in Metal-Enclosed Switchgear
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About This Item
IEEE C37.20.4-2001 is a technical standard for indoor AC switches rated from 1 kV to 38 kV for use in metal-enclosed switchgear. It addresses the design and application context of medium-voltage switching equipment, helping define expectations for construction, performance, and safe integration. For engineers, specifiers, and procurement teams, this standard provides a clear reference point for comparing switchgear components and supporting consistent compliance decisions.
What is IEEE C37.20.4-2001?
IEEE C37.20.4-2001 defines requirements and guidance for indoor AC switches intended for metal-enclosed switchgear applications. Its technical focus is the switch itself within an enclosed power distribution assembly, where rated voltage range, insulation coordination, and operating characteristics are important. The standard is useful when evaluating equipment that must fit a defined switchgear design and meet established engineering expectations for medium-voltage service. As a superseded document, it may still be referenced for legacy systems and installed equipment.
Where is IEEE C37.20.4-2001 used?
This standard is typically used in indoor medium-voltage switchgear assemblies found in utility substations, industrial power distribution rooms, and facility electrical infrastructure. IEEE C37.20.4-2001 is relevant when selecting or reviewing AC switches that operate as part of metal-enclosed switchgear for feeder control, isolation, or switching duties. It may also be used during equipment specification, bid review, maintenance planning, and documentation of existing installations that were designed to this standard.
Why is IEEE C37.20.4-2001 important?
IEEE C37.20.4-2001 matters because it helps create a common technical basis for indoor AC switch design and evaluation. That reduces ambiguity in procurement, supports more consistent testing and acceptance, and helps align equipment with the intended voltage class and enclosure type. For organizations managing medium-voltage assets, the standard can support safer engineering decisions, improve interoperability within switchgear lineups, and lower the risk of mismatched components or unclear compliance requirements.
- Indoor AC switches for 1 kV to 38 kV service
- Metal-enclosed switchgear applications
- Medium-voltage design and compliance reference
- Legacy equipment and installed-base support
- Specification, testing, and procurement use
- Publication Date: 2001
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C37.20.4 (2013)
- This Version: C37.20.4 (2001)
- Previous Version: C37.20.4 (1996)
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