IEC 62053-21-2020 PDF

Full title and description

St IEC 62053-21-2020 — Electricity metering equipment — Particular requirements — Part 21: Static meters for AC active energy (accuracy classes 0,5; 1 and 2). This international standard specifies accuracy-class specific requirements and type-test procedures for static (solid-state) watt‑hour meters intended to measure alternating‑current active energy in 50 Hz or 60 Hz networks.

Abstract

IEC 62053-21:2020 (Edition 2.0) defines the particular requirements for static AC active‑energy meters of specified accuracy classes. The 2020 edition refines accuracy and immunity tests, clarifies application to meters used with low power instrument transformers (LPITs), and moves general test-method descriptions to IEC 62052-11 so that IEC 62053-21 contains only accuracy‑class specific provisions. It is intended for type testing of static meters up to network voltages of 1 000 V AC, and addresses measurement uncertainty, repeatability, transient influence, and specified immunity requirements.

General information

• Status: Current / in force (International Standard).
• Publication date: 17 June 2020.
• Publisher: IEC — International Electrotechnical Commission (TC 13 Electrical energy measurement and control).
• ICS / categories: 17.220.20 (Electricity metering).
• Edition / version: Edition 2.0 (2020).
• Number of pages: 33.

Scope

Applies to static watt‑hour meters of accuracy classes 0.5, 1 and 2 for measurement of AC active energy in 50 Hz or 60 Hz networks. The standard covers type tests for meters intended for indoor and outdoor use, with all functional elements enclosed in or forming a single meter case (excluding indicating displays). It is applicable to directly connected meters and, when meters and LPITs are tested together, to meters intended to operate with low power instrument transformers. Network voltage applicability is up to 1 000 V AC. Safety requirements have been removed from this part and are covered separately in IEC 62052-31.

Key topics and requirements

• Accuracy class definitions and limits for static active‑energy meters (classes 0.5, 1, 2).
• Type‑test procedures specific to accuracy classes (performance under specified load, power factor and frequency conditions).
• Requirements for meters intended for use with LPITs and conditions for testing meters together with LPITs as directly connected meters.
• Measurement uncertainty and repeatability requirements (new/strengthened in 2020 edition).
• Influence of fast load current variations and corresponding test methods.
• Immunity to conducted differential current disturbances in the 2 kHz to 150 kHz frequency range.
• Reference to general requirements and test methods moved to IEC 62052-11 (so IEC 62053-21 focuses on class‑specific provisions).
• Removal of meter safety provisions from this part (see IEC 62052-31 for safety requirements).

Typical use and users

Used by electricity meter manufacturers, test laboratories, conformity assessment bodies, utilities, metrology and standards organizations, procurement teams, and product development engineers. It is referenced for type testing, design verification, regulatory compliance, and procurement specifications for static AC active‑energy meters (including smart meters) intended for revenue measurement and utility applications.

Related standards

Key related documents include IEC 62052-11 (General requirements, tests and test conditions for electricity meters), IEC 62052-31 (Meter safety requirements), other parts of IEC 62053 (parts covering different meter types and accuracy classes such as 22, 23, 24), and the IEC 61869 series (requirements for low power instrument transformers — LPITs) which are relevant when meters are used with LPITs.

Keywords

electricity metering, static meter, watt‑hour meter, active energy, accuracy class, type tests, LPIT, low power instrument transformer, immunity tests, measurement uncertainty, IEC 62053, smart meter

FAQ

Q: What is this standard?

A: IEC 62053-21:2020 is an international standard specifying particular requirements and type tests for static AC active‑energy (watt‑hour) meters in accuracy classes 0.5, 1 and 2.

Q: What does it cover?

A: It covers accuracy‑class specific performance and type‑test requirements for static meters measuring active energy in 50 Hz and 60 Hz systems (up to 1 000 V AC), including measurement uncertainty, repeatability, immunity to specified disturbances, and tests for operation with LPITs when tested together.

Q: Who typically uses it?

A: Meter manufacturers, test and calibration laboratories, utilities, regulators, procurement teams, and conformity assessment bodies use it to design, test, certify, and procure revenue‑grade static energy meters.

Q: Is it current or superseded?

A: IEC 62053-21:2020 (Edition 2.0) was published on 17 June 2020 and is the current edition. It supersedes earlier editions (for example the 2003 edition and its amendments). The standard includes a published stability date indicating its planned stability through 2027.

Q: Is it part of a series?

A: Yes. It is part of the IEC 62053 series (particular requirements for electricity metering equipment) and is intended to be used alongside IEC 62052-11 (general requirements and test methods) and IEC 62052-31 (safety), as well as other IEC 62053 parts addressing different meter types and classes.

Q: What are the key keywords?

A: Static meter, watt‑hour, active energy, accuracy class, LPIT, type test, immunity, measurement uncertainty, smart meter, IEC 62053-21:2020.