IEC 62054-21:2004/AMD1:2017
Amendment 1 - Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches
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About This Item
IEC 62054-21:2004/AMD1:2017 is an amendment to the parent document for electricity metering (AC) tariff and load control, focused on particular requirements for time switches. It is relevant when engineering teams, test laboratories, and procurement specialists need a technical reference that supports documented evaluation of time-based control functions used in metering and tariff-related equipment. For organizations working through compliance workflows, IEC 62054-21:2004/AMD1:2017 helps clarify how the parent document is modified and should be read in technical review and conformity assessment activities.
IEC 62054-21:2004/AMD1:2017 standard overview
This amendment is connected to IEC 62054-21:2004 and should be used as a supporting document rather than as a standalone technical specification. Based on the title, its scope is tied to particular requirements for time switches used in AC electricity metering, tariff control, and load control applications. In practice, it is most relevant when teams need to confirm how timing functions, operational behavior, or compliance expectations are updated against the parent reference during verification activities, engineering documentation review, or product evaluation.
Applications of IEC 62054-21:2004/AMD1:2017
Organizations may use IEC 62054-21:2004/AMD1:2017 when assessing time-switch functions in metering systems, tariff switching arrangements, or load-control equipment associated with electricity measurement. It can support testing workflows in laboratories, technical validation during product development, and procurement review where the exact compliance reference must be identified. The document is also useful for conformity assessment preparation, where teams need to align design files, test evidence, and regulatory preparation with the parent standard and its amendment history.
Why IEC 62054-21:2004/AMD1:2017 matters
For compliance and engineering teams, this amendment matters because it helps maintain consistency between the parent standard and current requirements used in technical assessment. That is important for quality assurance, risk management, and controlled verification of time-switch behavior in electricity metering applications. Using the correct amendment reference can reduce ambiguity during documented evaluation, support interoperability checks, and improve confidence in certification or procurement decisions. It also helps ensure that testing criteria and engineering documentation remain aligned throughout the product lifecycle.
- Supporting amendment to IEC 62054-21:2004 for time-switch requirements in AC electricity metering
- Useful for technical review, conformity assessment, and compliance workflows
- Relevant to testing, verification activities, and product evaluation for tariff or load control functions
- Helps maintain traceability between the parent document and the updated requirements
- Publication Date: 2017-01-30
- Standard Status: Amendment
- Publisher: IEC
- Edition: 1
- New Version Available: IEC 62054-21:2004 (2018-03-19)
- This Version: IEC 62054-21:2004 (2017-01-30)
- Previous Version: IEC 62054-21:2004 (2004-05-18)
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