SIST EN IEC 60688:2025

Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals (IEC 60688:2024)

IEC 60688:2024 applies to transducers (TRD) with electrical inputs and outputs for making measurements of AC or DC electrical quantities. The output signal can be in the form of an analogue or digital signal.
This document applies to measuring transducers used for converting electrical quantities such as:
– current,
– voltage,
– active power,
– reactive power,
– power factor,
– phase angle,
– frequency,
– harmonics or total harmonic distortion,
– apparent power, and
– DC power
to an output signal.
This document applies
a) if the fundamental frequency of the input(s) lies between 0 Hz and 1 500 Hz,
b) to the electrical measuring transducer if it is part of a system for the measurement of an electrical or non-electrical quantity,
c) to transducers for use in a variety of applications such as telemetry and process control and in one of a number of defined environments.
This document is not applicable for:
– instrument transformers that comply with IEC 61869 (all parts),
– transmitters for use in an industrial process application that comply with IEC 60770 (all parts),
– power metering and monitoring devices (PMD) that comply with IEC 61557-12,
– meters that comply with the IEC 62053 series,
– handheld sensors,
– residual current monitoring devices (RCMs) that comply with IEC 62020-1,
– residual current detecting devices (RDC-DD) that comply with IEC 62955,
– in-cable control and protection devices (IC-CPDs) that comply with IEC 62752,
– modular residual current devices (MRCDs) that comply with IEC 60947 2:2016/AMD1:2019, Annex M.
Within the measuring range, the output signal is a function of the measurand. An auxiliary supply can be required.
This document is intended:
– to specify the terminology and definitions relating to transducers whose main application is in industry,
– to unify the test methods used in evaluating transducer performance,
– to specify accuracy limits and output values for transducers.
IEC 60688:2024 cancels and replaces the fourth edition published in 2021. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) updating normative references;
b) updating definitions;
c) updating structure;
d) adding DC power measurement.

Elektrische Messumformer zur Umwandlung von elektrischen Wechselstromgrößen und Gleichstromgrößen in analoge oder digitale Signale (IEC 60688:2024)

Transducteurs électriques de mesure convertissant les grandeurs électriques alternatives ou continues en signaux analogiques ou numériques (IEC 60688:2024)

L'IEC 60688:2024 s’applique aux transducteurs (TRD) à grandeurs d’entrées et de sorties électriques destinés à mesurer des grandeurs électriques alternatives ou continues. Le signal de sortie peut être sous la forme d’un signal analogique ou numérique.
Le présent document s’applique aux transducteurs de mesure destinés à convertir des grandeurs électriques, telles que:
– le courant;
– la tension;
– la puissance active;
– la puissance réactive;
– le facteur de puissance;
– le déphasage;
– la fréquence;
– les harmoniques ou la distorsion harmonique totale;
– la puissance apparente; et
– la puissance en courant continu,
en signal de sortie.
Le présent document s’applique:
a) si la fréquence fondamentale de la ou des grandeurs d’entrée est comprise entre 0 Hz et 1 500 Hz;
b) à un transducteur de mesure électrique appartenant à une chaîne de mesure d’une grandeur électrique ou non électrique;
c) aux transducteurs destinés à une utilisation générale, par exemple à la télémesure, à la commande de processus et dans un des nombreux environnements spécifiés.
Le présent document ne s’applique pas:
– aux transformateurs de mesure conformes à la série IEC 61869;
– aux transmetteurs utilisés dans un processus industriel conforme à la série IEC 60770;
– aux dispositifs de comptage et de surveillance du réseau électrique (PMD) conformes à l’IEC 61557-12;
– aux compteurs conformes à la série IEC 62053;
– aux capteurs portatifs;
– aux contrôleurs d’isolement à courant différentiel résiduel (RCM) conformes à l’IEC 62020-1;
– aux dispositifs de détection de courant résiduel (RDC-DD) conformes à la série IEC 62955;
– aux dispositifs de contrôle et de protection intégrés au câble (IC-CPD) conformes à la série IEC 62752;
– aux dispositifs modulaires à courant résiduel (MRCD) conformes à l’IEC 60947-2:2016/AMD1:2019, Annexe M.
Dans l’étendue de mesure, le signal de sortie varie en fonction du mesurande. Une alimentation auxiliaire peut être exigée.
Le présent document a pour objet:
– de spécifier la terminologie et les définitions relatives aux transducteurs dont l’application principale relève du domaine de l’industrie;
– d’unifier les méthodes d’essai utilisées pour évaluer les performances des transducteurs;
– de spécifier les limites de précision et les valeurs de sortie des transducteurs.
L'IEC 60688:2024 annule et remplace la quatrième édition parue en 2021. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) mise à jour des références normatives;
b) mise à jour des définitions;
c) mise à jour de la structure;
d) ajout du mesurage de la puissance en courant continu.

Električni merilni pretvorniki za pretvarjanje izmeničnih električnih veličin v analogne ali digitalne signale (IEC 60688:2024)

General Information

• Status: Published
• Public Enquiry End Date: 17-Dec-2023
• Publication Date: 14-Jan-2025
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Dec-2024
• Due Date: 06-Mar-2025
• Completion Date: 15-Jan-2025
• Ref Project: EN IEC 60688:2024 - Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals

Relations

• Revises: oSIST prEN IEC 60688:2021 - Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals
• Effective Date: 13-Feb-2024
• Revises: SIST EN 60688:2013 - Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals (IEC 60688:2012)
• Effective Date: 17-Oct-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2025
Električni merilni pretvorniki za pretvarjanje izmeničnih električnih veličin v
analogne ali digitalne signale (IEC 60688:2024)
Electrical measuring transducers for converting AC and DC electrical quantities to
analogue or digital signals (IEC 60688:2024)
Elektrische Messumformer zur Umwandlung von elektrischen Wechselstromgrößen und
Gleichstromgrößen in analoge oder digitale Signale (IEC 60688:2024)
Transducteurs électriques de mesure convertissant les grandeurs électriques
alternatives ou continues en signaux analogiques ou numériques (IEC 60688:2024)
Ta slovenski standard je istoveten z: EN IEC 60688:2024
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60688

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 17.220.20 Supersedes EN 60688:2013
English Version
Electrical measuring transducers for converting AC and DC
electrical quantities to analogue or digital signals
(IEC 60688:2024)
Transducteurs électriques de mesure convertissant les Elektrische Messumformer zur Umwandlung von
grandeurs électriques alternatives ou continues en signaux elektrischen Wechselstromgrößen und Gleichstromgrößen
analogiques ou numériques in analoge oder digitale Signale
(IEC 60688:2024) (IEC 60688:2024)
This European Standard was approved by CENELEC on 2024-10-16. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60688:2024 E
European foreword
The text of document 85/921/FDIS, future edition 5 of IEC 60688, prepared by TC 85 "Measuring
equipment for electrical and electromagnetic quantities" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN IEC 60688:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-12-31
document have to be withdrawn
This document supersedes EN 60688:2013 and all of its amendments and corrigenda (if any).
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.
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 60688:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60051 (series) NOTE Approved as EN IEC 60051 (series)
IEC 60051-1 NOTE Approved as EN 60051-1
IEC 60068-2-30 NOTE Approved as EN 60068-2-30
IEC 60255-151 NOTE Approved as EN 60255-151
IEC 60359 NOTE Approved as EN 60359
IEC 60364-4-44 NOTE Approved as HD 60364-4-444
IEC 60381-1:1982 NOTE Approved as HD 452.1 S1:1984 (not modified)
IEC 60664-1 NOTE Approved as EN IEC 60664-1
IEC 61000-4-7 NOTE Approved as EN 61000-4-7
IEC 61010 (series) NOTE Approved as EN IEC 61010 (series)
IEC 61869 (series) NOTE Approved as EN IEC 61869 (series)
IEC 62052-11:2020 NOTE Approved as EN IEC 62052-11:2021 (not modified) + A11:2022
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - Test EN 60068-2-6 -
Fc: Vibration (sinusoidal)
IEC 60068-2-11 - Environmental testing - Part 2-11: Tests - EN IEC 60068-2-11 -
Test Ka: Salt mist
IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - EN 60068-2-27 -
Test Ea and guidance: Shock
IEC 60068-2-52 2017 Environmental testing - Part 2-52: Tests - EN IEC 60068-2-52 2018
Test Kb: Salt mist, cyclic (sodium chloride
solution)
IEC 60228 2023 Conductors of insulated cables EN IEC 60228 2024
IEC/TR 61000-2-3 - Electromagnetic compatibility (EMC) - Part 2: - -
Environment - Section 3: Description of the
environment - Radiated and non-network-
frequency-related conducted phenomena
IEC 61010-1 2010 Safety requirements for electrical equipment EN 61010-1 2010
for measurement, control, and laboratory use
- Part 1: General requirements
+ A1 (mod) 2016 + A1 2019
IEC 61010-2-030 2023 Safety requirements for electrical equipment - -
for measurement, control, and laboratory use
- Part 2-030: Particular requirements for
equipment having testing or measuring
circuits
IEC 61326-1 2020 Electrical equipment for measurement, EN IEC 61326-1 2021
control and laboratory use - EMC
requirements - Part 1: General requirements
Publication Year Title EN/HD Year
IEC 61557-12 2018 Electrical safety in low voltage distribution EN IEC 61557-12 2022
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)
+ A1 2021 + A1 2022
IEC 61558-1 2017 Safety of transformers, reactors, power EN IEC 61558-1 2019
supply units and combinations thereof - Part
1: General requirements and tests
IEC 60664-1 2020 Insulation coordination for equipment within EN IEC 60664-1 2020
low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 62586-1 2017 Power quality measurement in power supply EN 62586-1 2017
systems - Part 1: Power quality instruments
(PQI)
ISO 4628-3 - Paints and varnishes - Evaluation of - -
degradation of coatings - Designation of
quantity and size of defects, and of intensity
of uniform changes in appearance - Part 3:
Assessment of degree of rusting

IEC 60688 ®
Edition 5.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical measuring transducers for converting AC and DC electrical quantities

to analogue or digital signals

Transducteurs électriques de mesure convertissant les grandeurs électriques

alternatives ou continues en signaux analogiques ou numériques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20  ISBN 978-2-8322-9547-2

– 2 – IEC 60688:2024 © IEC 2024
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 13
3 Terms and definitions . 14
3.1 General terms . 14
3.2 Terms describing transducers . 15
3.3 Terms describing transducers according to the measurand . 17
3.4 Terms describing transducers according to their output load . 18
3.5 Nominal values . 19
3.6 Terms describing transducers with provisions to be adjusted by users . 19
3.7 Influence quantities and reference conditions. 20
3.8 Errors and variations . 20
3.9 Accuracy, accuracy class, class index. 21
3.10 Terms related to primary of transducers . 21
3.11 Terms related to secondary output of transducers . 22
4 Environmental conditions . 22
5 Ratings . 22
6 Requirements for design and construction . 23
6.1 General . 23
6.1.1 Transducer general architecture . 23
6.1.2 Classification of transducers (TRD) . 23
6.2 Safety requirements . 24
6.2.1 General . 24
6.2.2 Protection against electric shocks . 24
6.2.3 Protection against mechanical hazards . 25
6.2.4 Resistance to mechanical stress . 25
6.2.5 Protection against the spread of fire . 25
6.2.6 Equipment temperature limits and resistance to heat . 25
6.2.7 Protection against hazards from fluids . 26
6.2.8 Protection against radiation, including laser sources, and against sonic
and ultrasonic pressure . 26
6.2.9 Protection against liberated gases and substances, explosion and
implosion . 26
6.2.10 Components and subassemblies. 26
6.2.11 Protection by interlocks . 26
6.2.12 Hazards resulting from application . 26
6.2.13 Risk assessment . 27
6.3 EMC requirements . 27
6.3.1 General . 27
6.3.2 Immunity requirements . 27
6.3.3 Emission requirements . 28
6.4 Climatic requirements . 28
6.5 Mechanical requirements . 28
6.6 Functional requirements . 28
6.7 Marking requirements . 28
6.8 Documentation requirements .
...