EN IEC 61557-7:2022/A1:2023

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 7: Phase sequence

2022-06-02: CLC/TC 85X made a decision to temporarily remove the link, meanwhile working on the harmonziation issue via another amendment togther with CLC/TC 65X

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 7: Phasenfolge (Drehfeld)

Sécurité électrique dans les réseaux de distribution basse tension au plus égale à 1 000 V en courant alternatif et 1 500 V en courant continu - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection - Partie 7: Ordre de phases

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 000 V in enosmerne napetosti do 1 500 V - Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov - 7. del: Fazno zaporedje - Dodatek A1

General Information

• Status: Published
• Publication Date: 05-Oct-2023
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.080.01 - Electrical insulation in general
• ICS: 29.240.01 - Power transmission and distribution networks in general
• Technical Committee: CLC/TC 85X - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: IEC/TC 85 - IEC_TC_85
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Oct-2023
• Completion Date: 06-Oct-2023
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: SIST EN IEC 61557-7:2022/A1:2024 - 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 7: Phase sequence

Relations

• Amends: EN IEC 61557-7:2022 - Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence
• Effective Date: 27-Apr-2021

Overview

EN IEC 61557-7:2022/A1:2023 is a critical European amendment to the international standard IEC 61557-7:2019, focusing on the phase sequence aspect of electrical safety in low voltage distribution systems. This standard addresses equipment used for testing, measuring, or monitoring protective measures in systems operating up to 1 000 V AC and 1 500 V DC.

The amendment A1, approved in 2023, brings important clarifications and updates specific to phase sequence indicators, including requirements for both direct and non-contact phase detection methods. These enhancements ensure improved reliability and safety across electrical installations, harmonizing measurement equipment standards under the control of the European Committee for Electrotechnical Standardization (CENELEC).

Key Topics

• Scope and Application
  Establishes the requirements for equipment testing phase sequence in low voltage power distribution networks (up to 1,000 V AC and 1,500 V DC), essential for confirming correct phase order to prevent equipment damage and safety hazards.

• Phase Sequence Measurement Methods

  • Direct Contact Testing: Utilizes test probes to measure phase sequence via direct connection to live parts, conductors, or terminals.
  • Non-Contact Phase Detection: Introduces the use of capacitive test clips for detecting phase sequence without direct contact, enhancing safety by allowing testing on insulated or uninsulated conductors.

• Mechanical and Electrical Requirements
  Devices and accessories must meet mechanical strength criteria set by IEC 61010-1 and spring-loaded clip conformity per IEC 61010-031. Overvoltage handling and surface temperature limits are also standardized to ensure operational safety.

• Marking and Operating Instructions
  Manufacturers are required to provide clear instructions covering:

  • Error indication protocols during phase sequence testing
  • Limits of unbalance in amplitude and phase delay handled by the equipment
  • Audible and visual indication specifications for test result clarity

• Audible and Visual Indications
  Visual displays must be easily discernible from a half-meter distance under normal ambient lighting. Audible signals must meet specific sound pressure levels to be clearly noticeable in noisy environments, improving user response and accuracy.

Applications

• Electrical Installations and Maintenance
  Ensures the correct phase rotation is identified during installation or periodic maintenance of three-phase electrical systems to avoid motor damage or malfunction of connected equipment.

• Safety Compliance and Verification
  Helps electricians and safety inspectors verify equipment grounding and protective measures by confirming the sequence of phases, critical for preventing electrical faults and ensuring personnel safety.

• Non-Intrusive Testing in Industrial Environments
  The introduction of non-contact phase detection clips allows safer testing in industrial settings where direct contact might be hazardous or impractical, facilitating rapid and secure field measurements.

• Electrical Component Manufacturing
  Used in quality control to test phase sequence functionality during the manufacturing of electrical measuring instruments and protective devices.

Related Standards

• IEC 61557-1 – General requirements for equipment testing protective measures in electrical systems.
• IEC 61010-1 – Safety requirements for electrical equipment for measurement, control, and laboratory use (mechanical strength and temperature limits referenced).
• IEC 61010-031 – Requirements for test probes and clips, including spring-loaded clips used for direct and non-contact testing.
• IEC 61557 (other parts) – Covers broader protective measurement and testing equipment for low voltage systems.

---

EN IEC 61557-7:2022/A1:2023 represents the current state-of-the-art framework for phase sequence testing equipment, reinforcing electrical safety in low voltage systems and supporting harmonized testing methodologies across Europe. Its implementation is indispensable for professionals involved in electrical system installation, testing, verification, and maintenance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2024
Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti
do 1 000 V in enosmerne napetosti do 1 500 V - Oprema za preskušanje, merjenje
ali nadzorovanje zaščitnih ukrepov - 7. del: Fazno zaporedje - Dodatek A1
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 7: Phase
sequence
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 7: Drehfeld
Sécurité électrique dans les réseaux de distribution basse tension au plus égale à 1 000
V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures
de protection - Partie 7: Ordre de phases
Ta slovenski standard je istoveten z: EN IEC 61557-7:2022/A1:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.080.01 Električna izolacija na Electrical insulation in
splošno general
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61557-7:2022/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 17.220.20; 29.080.01; 29.240.01

English Version
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 7: Phase sequence
(IEC 61557-7:2019/AMD1:2023)
Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen bis AC
tension au plus égale à 1 000 V en courant alternatif et 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder
1 500 V en courant continu - Dispositifs de contrôle, de Überwachen von Schutzmaßnahmen - Teil 7: Phasenfolge
mesure ou de surveillance de mesures de protection - (Drehfeld)
Partie 7: Ordre de phases (IEC 61557-7:2019/AMD1:2023)
(IEC 61557-7:2019/AMD1:2023)
This amendment A1 modifies the European Standard EN IEC 61557-7:2022; it was approved by CENELEC on 2023-09-29. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61557-7:2022/A1:2023 E

European foreword
The text of document 85/872/FDIS, future IEC 61557-7/AMD1, prepared by IEC/TC 85 "Measuring
equipment for electrical and electromagnetic quantities" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN IEC 61557-7:2022/A1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-06-29
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-09-29
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request addressed to CENELEC by the
European Commission.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61557-7:2019/AMD1:2023 was approved by CENELEC as
a European Standard without any modification.

IEC 61557-7 ®
Edition 3.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
AMENDMENT 1
AMENDEMENT 1
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 7: Phase sequence
Sécurité électrique dans les réseaux de distribution basse tension au plus égale

à 1 000 V en courant alternatif et 1 500 V en courant continu – Dispositifs de

contrôle, de mesure ou de surveillance de mesures de protection –

Partie 7: Ordre de phases
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20, 29.080.01, 29.240.01 ISBN 978-2-8322-7227-5

– 2 – IEC 61557-7:2019/AMD1:2023
© IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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 7: Phase sequence
AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may p
...