IEEE C37.21-1985
IEEE Standard for Control Switchboards
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- Language: English
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- Language: English
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About This Item
IEEE C37.21-1985 is a standard for control switchboards used in power, energy, and industrial applications. It addresses the technical expectations that support safe and consistent switchboard design, helping engineers, specifiers, and purchasers align equipment with established practice. For facilities that depend on orderly control and distribution functions, the standard can be a useful reference for planning, evaluation, and procurement of switchboard assemblies.
What is IEEE C37.21-1985?
IEEE C37.21-1985 defines requirements and guidance for control switchboards, which are commonly used to organize control, indication, and related switching functions in electrical systems. As an IEEE standard, it provides a structured technical basis for describing switchboard characteristics, helping reduce ambiguity in design and comparison between products. It is most relevant when a project needs a clear reference for how control switchboards should be configured, constructed, or assessed in power-system environments.
Where is IEEE C37.21-1985 used?
This standard is typically used where control switchboards support electrical distribution, supervision, or operating control in power and industrial settings. It may apply in substations, generating facilities, utility control areas, and plant electrical rooms where switchboards coordinate multiple circuits or control points. IEEE C37.21-1985 is also useful during specification writing, equipment review, and acceptance checks when teams need a common technical basis for switchboard selection and documentation.
Why is IEEE C37.21-1985 important?
IEEE C37.21-1985 matters because it helps bring consistency to control switchboard design and evaluation. In practice, that can support safer installations, clearer procurement decisions, and more reliable comparison of equipment from different sources. Using a recognized standard also reduces the risk of misunderstandings about ratings, arrangement, or intended application. For owners and engineers, it can improve compliance planning and help ensure that switchboards fit the operational needs of power and energy systems.
- Control switchboard requirements
- Power and industrial application context
- Design and specification reference
- Equipment evaluation and procurement support
- Superseded IEEE standard in English
- Publication Date: 1988
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C37.21 (2020)
- Previous Version: C37.21 (2017)
- Previous Version: C37.21 (2005)
- This Version: C37.21 (1988)
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