IEEE C37.90.2-1987
Use Standard Withstand Capability of Relay Systems to Radiated Electromagnetic Interference from Transceivers
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About This Item
C37.90.2-1987 is a standard for evaluating the withstand capability of relay systems to radiated electromagnetic interference from transceivers. It addresses how protective and control relays may respond when exposed to nearby radio-frequency fields, helping engineers assess immunity and reduce unwanted operation. In power and energy applications, this technical document is relevant wherever relay performance must remain stable in electrically noisy environments and under electromagnetic exposure from communication equipment.
C37.90.2-1987 overview
This standard focuses on radiated interference testing for relay systems, with emphasis on electromagnetic energy that may be received from transceivers. C37.90.2-1987 is intended to help define how relay equipment should be checked for susceptibility to external fields and whether its operation remains acceptable during exposure. For systems used in power-related installations, the document supports a more consistent approach to immunity verification, especially where control reliability is important.
Typical use cases
C37.90.2-1987 is commonly consulted when relays are installed near portable radios, site communications gear, or other transceiver-driven equipment that can generate local RF fields. It is relevant to substation control panels, protection relays, and related monitoring or switching systems used in power installations. The standard may also be useful during test planning, equipment qualification, or procurement review when comparing how different relay systems handle radiated electromagnetic interference.
Why this standard matters
Reliable relay operation is critical in systems where false trips or missed actions can affect service continuity and equipment protection. C37.90.2-1987 helps provide a structured basis for testing and design evaluation so that electromagnetic exposure is considered before deployment. That can support compliance discussions, reduce integration risk, and improve confidence that relay systems will perform consistently in environments where transceivers and other RF sources are present.
- Radiated electromagnetic interference from transceivers
- Relay system immunity and withstand evaluation
- Power and energy control environments
- Testing and qualification reference
- Protection against unwanted relay operation
- Publication Date: 1987
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Fields, Waves and Electromagnetics; Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: C37.90.2 (2025)
- Previous Version: C37.90.2 (2004)
- Previous Version: C37.90.2 (1994)
- This Version: C37.90.2 (1987)
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