IEC 61557-12-2018 amd1-2021 cor1-2022 PDF

Full title and description

St IEC 61557-12:2018 AMD1:2021 COR1:2022 — Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC — Equipment for testing, measuring or monitoring of protective measures — Part 12: Power metering and monitoring devices (PMD). This consolidated publication specifies performance, functional and information requirements for fixed and portable power metering and monitoring devices used in low-voltage distribution systems.

Abstract

IEC 61557-12 establishes requirements for power metering and monitoring devices (PMD) that measure and monitor electrical quantities (voltage, current, active/reactive power, energy, frequency, power factor and related signals) in single- and three-phase AC or DC systems up to 1 000 V AC / 1 500 V DC. It defines device categories with minimum required functions, measurement performance and applicable environmental and information requirements; the consolidated edition includes Amendment 1 (2021) and Corrigendum 1 (2022).

General information

• Status: Published — consolidated edition including Amendment 1 (2021) and Corrigendum 1 (2022); current/stable until 2027.
• Publication date: 2018-10-22 (Amendment 1 published 2021-05-21; Corrigendum 1 published 2022-09-12).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 17.220.20, 29.080.01, 29.240.01.
• Edition / version: Edition 2.0 (consolidated with AMD1:2021 / COR1:2022).
• Number of pages: 206 (base publication).

Scope

Specifies requirements for power metering and monitoring devices (PMD) that measure and monitor electrical quantities within low-voltage distribution systems (rated voltages up to 1 000 V AC or 1 500 V DC). Applies to fixed and portable PMDs for industrial and commercial applications and defines functional categories, minimum functions, performance and information (marking, instructions). The standard does not address functional safety or cybersecurity and excludes equipment covered by IEC 62053 (electricity metering), IEC 62586 (power quality instruments) and IEC 60051 (direct‑acting analogue meters).

Key topics and requirements

• Definition and classification of PMD categories with lists of minimum required functions for each category (e.g., basic monitoring up to advanced metering functions).
• Performance requirements for measurements of voltage, current, active/reactive power and energy, frequency and power factor (including conventions for power factor in Annex C).
• Requirements for measurement uncertainty, accuracy limits and influence quantities appropriate to PMD use.
• Environmental, electromagnetic compatibility and mechanical requirements for fixed and portable devices.
• Information, marking and documentation requirements (user instructions, installation and safety information).
• Exclusions and relationships to other standards (IEC 62053 series, IEC 62586, IEC 60051 and other parts of IEC 61557).

Typical use and users

Used by electrical testers, installers, commissioning engineers, maintenance teams, metrology labs and manufacturers of PMDs to verify measurement performance and compliance when monitoring electrical distribution systems in commercial and industrial installations. Also consulted by standards committees and conformity bodies assessing PMD features and documentation.

Related standards

Other parts of the IEC 61557 series (general requirements and measurement-specific parts) are directly related (for example IEC 61557-1 for general requirements and various parts covering insulation, loop impedance, leakage current, etc.). Related metering and power-quality standards include IEC 62053 (electricity metering), IEC 62586 (power quality instruments) and IEC 60051 (analogue electrical meters); these documents define complementary or excluded scopes.

Keywords

PMD, power metering, monitoring devices, low-voltage distribution, energy measurement, voltage, current, power, power factor, measurement uncertainty, IEC 61557, amendment, corrigendum.

FAQ

Q: What is this standard?

A: It is Part 12 of the IEC 61557 series that defines requirements for power metering and monitoring devices (PMD) used in low-voltage distribution systems; the cited edition is IEC 61557-12:2018 consolidated with Amendment 1 (2021) and Corrigendum 1 (2022).

Q: What does it cover?

A: Measurement and monitoring performance, functional categorization, environmental and EMC requirements, information and marking for PMDs measuring electrical quantities in systems up to 1 000 V AC / 1 500 V DC; it explicitly excludes certain dedicated electricity-metering and PQI equipment covered by other IEC standards.

Q: Who typically uses it?

A: Manufacturers of PMDs, test and commissioning engineers, maintenance and facilities personnel, metrology and conformity assessment bodies, and standards developers working on electrical distribution measurement and monitoring.

Q: Is it current or superseded?

A: The 2018 second edition is the active edition and has been consolidated with Amendment 1 (2021) and Corrigendum 1 (2022); the publication shows a stability date toward 2027 (i.e., it remains the valid consolidated document until review).

Q: Is it part of a series?

A: Yes — IEC 61557 is a series of standards covering equipment for testing, measuring or monitoring protective measures in low-voltage distribution systems; Part 1 defines general requirements and other parts define device- or measurement-specific requirements.

Q: What are the key keywords?

A: Power metering, monitoring devices, PMD, energy measurement, voltage, current, power factor, measurement uncertainty, IEC 61557-12, low-voltage distribution.