IEC 61557-7:2019/AMD1:2023

Amendment 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

Amendement 1 - 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

General Information

• Status: Published
• Publication Date: 24-Aug-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: TC 85 - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: WG 8 - TC 85/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 18-Aug-2023
• Completion Date: 25-Aug-2023

Relations

• Amends: IEC 61557-7:2019 - 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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
IEC 61557-7:2019-07/AMD1:2023-08(en-fr)

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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
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Amendment 1 to IEC 61557-7:2019 has been prepared by IEC technical committee 85:
Measuring equipment for electrical and electromagnetic quantities.

© IEC 2023
The text of this Amendment is based on the following documents:
Draft Report on voting
85/872/FDIS 85/882/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
___________
1 Scope
Replace the NOTE by the following:
NOTE Common three-phase distribution systems are depicted in IEC 61010-1:2010, Annex I and
IEC 61010-1:2010/AMD1:2016, Annex I.
4 Requirements
4.3 Measuring equipment
4.3.1 General
Replace the last paragraph by the following:
The phase sequence test (see Annex B) can be realised with test probes for direct contact
with live parts, conductors or terminals, or with capacitive test clips for non-contact phase
detection on insulated or uninsulated conductors.
4.3.3 Test leads for direct contact with live parts and accessories
Replace the fifth paragraph by the following:
Portable measuring equipment, together with its test leads, shall comply with the
requirements for mechanical strength in accordance with IEC 61010-1 and in addition shall be
tested in accordance with 6.3.1.

– 4 – IEC 61557-7:2019/AMD1:2023
© IEC 2023
Add the following new subclause:
4.3.4 Test clips for non-contact phase detection
Phase sequence indicators designed for operation without direct contact to live parts shall be
provided with leads and capacitive test clips for phase detection on insulated or uninsulated
conductors complying with the requirements for spring-loaded clips of IEC 61010-031.
5 Marking and operating instructions
5.2 Operating instructions
Replace the text by the following:
In addition to IEC 61557-1:2019, 5.3, the following information shall be provided in the
operating instructions:
– specific indications for the error cases of 4.2,
– limits of unbalance in amplitude and phase delay handled reliably by the phase sequence
indicator.
6 Tests
6.1 General
6.1.2 Visual display
Replace the first sentence of the second paragraph by the following:
The display shall be unambiguously discernible by an observer with average sight from a
distance of 0,5 m at ambient lighting levels from 30 lx to 1 000 lx.
6.1.3 Audible indication (if applicable)
Replace the text by the following:
The audible indication shall generate a sound level equal to or greater than 58,5 dB if
continuous or 55,5 dB if intermittent in the frequency range between 1 kHz and 4 kHz.
The test shall be performed in accordance with Figure 1.
The alternative test consisting in comparing the perceptibility of the audible indication under
reference conditions with a phase sequence indicator that has successfully passed the type
test is adequate for the routine test. The sound on the item under test shall produce a similar
or better indication (routine test).

© IEC 2023
Dimensions in millimetres
Key
A hemisphere measurement distance
B microphone
C sound emitter
D phase sequence indicator
E sound absorbing material
F mounting surface
Figure 1 – Test set-up for measurement of perceptibility of the audible indication
6.3 Test of mechanical requirements (type tests)
Add the following new subclause:
6.3.3 Test of clips for non-contact phase detection
Tests clips and leads for non-contact detection on insulated or uninsulated conductors shall
comply with the
...