EN 62054-21:2004/A1:2017
(Amendment)Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches
General Information
- Abstract
Specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment
- Status
- Published
- Publication Date
- 18-May-2017
- Withdrawal Date
- 18-May-2021
- Technical Committee
- CLC/TC 13 - Equipment for electrical energy measurement and load control
- Drafting Committee
- IEC/TC 13 - IEC_TC_13
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 19-May-2017
- Completion Date
- 19-May-2017
Overview
EN 62054-21:2004/A1:2017 (IEC 62054-21:2004/A1:2017) sets out the particular requirements for time switches used in electricity metering (AC) for tariff and load control. The standard specifies the type-test requirements for newly manufactured indoor time switches with an operation reserve that are intended to control electrical loads, multi-tariff registers and maximum demand devices. Amendment A1 (2017) updates the base publication and clarifies the safety coverage now handled by IEC 62052-31:2015.
Key topics and requirements
- Scope: Type testing of indoor time switches and electronic ripple control receivers used with metering equipment for tariff switching and load control.
- Functionality focus: Operation reserve (backup timing), reliable tariff switching, and interfaces to multi-tariff registers and maximum demand devices.
- Compliance approach: Particular requirements complement the general test and test-condition standards for electricity metering equipment.
- Safety separation: Amendment A1 removes safety-related tests from this part and points to IEC 62052-31:2015 for product safety requirements and tests.
- Normative references: Integrates and references general metering requirements such as IEC/EN 62052-21 (tariff and load control equipment) and IEC 62052-31 (product safety).
- Type-test emphasis: Ensures manufactured time switches meet consistent performance and reliability criteria before deployment with meter installations.
Applications
This standard is directly applicable to:
- Meter manufacturers designing time switches and electronic ripple control receivers for tariff switching and load control.
- Test laboratories performing type tests and conformity assessment for metering peripheral devices.
- Utilities and energy suppliers specifying metering components for multi-tariff billing, demand management and remote load control.
- Certification bodies and compliance engineers verifying products meet European/CENELEC and IEC metering requirements.
Practical use cases include time-based tariff switching, automated load shedding/management, and control inputs for multi-tariff registers or maximum demand recording in commercial and residential metering systems.
Related standards
- IEC 62054-21 / EN 62054-21 (base standard - tariff and load control, Part 21)
- IEC/EN 62052-21 (General requirements, tests and test conditions - Tariff and load control equipment)
- IEC 62052-31 / EN 62052-31:2015 (Product safety requirements and tests) - covers safety requirements removed from the A1 amendment
This standard is essential for anyone involved in electricity metering hardware design, testing and compliance where reliable time switches and tariff/load control functions are required.
Relations
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 25-Jan-2023
- Effective Date
- 03-Apr-2018
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Frequently Asked Questions
EN 62054-21:2004/A1:2017 is a amendment published by CLC. Its full title is "Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches". This standard covers: Specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment
Specifies particular requirements for the type test of newly manufactured indoor time switches with operation reserve that are used to control electrical loads, multi-tariff registers and maximum demand devices of electricity metering equipment
EN 62054-21:2004/A1:2017 is classified under the following ICS (International Classification for Standards) categories: 91.140.50 - Electricity supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 62054-21:2004/A1:2017 has the following relationships with other standards: It is inter standard links to EN 62052-21:2004, EN 62052-21:2004/A1:2017, EN 62052-31:2016, EN IEC 62055-31:2022, EN 62054-21:2004, EN 62054-21:2004/A1:2017/AC:2018-04. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 62054-21:2004/A1:2017 is associated with the following European legislation: EU Directives/Regulations: 2004/108/EC, 2004/108/EU, 2014/30/EU; Standardization Mandates: M/404. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 62054-21:2004/A1:2017 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.