EN 60688:2013
(Main)Electrical measuring transducers for converting A.C. and D.C. electrical quantities to analogue or digital signals
Electrical measuring transducers for converting A.C. and D.C. electrical quantities to analogue or digital signals
IEC 60688:2012 applies to transducers with electrical inputs and outputs for making measurements of a.c. or d.c. electrical quantities. This International Standard is intended to specify the terminology and definitions relating to transducers whose main application are in industry; to unify the test methods used in evaluating transducer performance; and to specify accuracy limits and output values for transducers. The output signal may be in the form of an analogue direct current, an analogue direct voltage or in digital form. In this case, that part of the transducer utilized for communication purposes will need to be compatible with the external system. This standard 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, and apparent power to an output signal. This standard is not applicable for instrument transformers that comply with IEC 60044 series; transmitters for use in industrial process applications that comply with the IEC 60770 series; performance measuring and monitoring devices (PMD) that comply with IEC 61557-12.
Elektrische Messumformer zur Umwandlung von elektrischen Wechselstromgrößen und Gleichstromgrößen in analoge oder digitale Signale
Transducteurs électriques de mesure convertissant les grandeurs électriques alternatives ou continues en signaux analogiques ou numériques
La CEI 60688:2012 s'applique aux transducteurs à grandeurs d'entrées et de sorties électriques destinés à mesurer des grandeurs électriques alternatives ou continues. La présente Norme internationale a pour objet de spécifier la terminologie et les définitions relatives aux transducteurs dont l'application principale est du domaine de l'industrie; d'unifier les méthodes d'essai utilisées pour évaluer les caractéristiques de fonctionnement des transducteurs; et de spécifier les limites de précision et les valeurs de sortie des transducteurs. Le signal de sortie peut être sous la forme de courant continu analogique ou d'une tension continue ou d'un signal numérique. Dans ce cas, la partie du transducteur utilisée à des fins de communication doit pouvoir être compatible avec le système extérieur. Cette norme s'applique aux transducteurs de mesure destinés à convertir des grandeurs électriques alternatives, telles que courants, tensions, puissances actives, puissances réactives, facteurs de puissance, angles de phase, fréquences, harmoniques ou distorsion harmonique totale, et puissances apparentes en signal de sortie. Ce standard ne s'applique pas pour les transformateurs de mesure répondant aux normes de la série CEI 60044; les transducteurs utilisés dans le processus industriel répondant aux normes de la série CEI 60770; et les dispositifs de mesure et de surveillance des performances (PMD) répondant à la norme CEI 61557-12.
Električni merilni pretvorniki za pretvarjanje izmeničnih električnih veličin v analogne ali digitalne signale (IEC 60688:2012)
Ta mednarodni standard se uporablja za pretvornike z električnimi vhodi in izhodi za izvajanje meritev izmeničnih ali enosmernih električnih veličin. Izhodni signal je lahko v obliki analognega enosmernega toka, analogne enosmerne napetosti ali v digitalni obliki. V tem primeru mora biti tisti del pretvornika, ki se uporablja za komunikacijo, združljiv z zunanjim sistemom. Ta standard se uporablja za merjenje pretvornikov, ki se uporabljajo za pretvarjanje električnih veličin, kot so: – tok, – napetost, – delovna moč, – jalova moč, – faktor moči, – fazni kot, – frekvenca, – harmoniki ali skupna harmonska popačenja, – navidezna moč v izhodni signal. Ta standard se ne uporablja za: – instrumentne transformatorje, ki izpolnjujejo zahteve skupine standardov IEC 60044; – oddajnike za uporabo v industrijskih procesih, ki izpolnjujejo zahteve skupine standardov IEC 60770; – naprave za merjenje in nadzorovanje lastnosti/parametrov električnih omrežij (PMD), ki izpolnjujejo zahteve standarda IEC 61557-12. V okviru merilnega razpona je izhodni signal funkcija merjene veličine. Morda je potrebno pomožno napajanje. Ta standard se uporablja: a) če je nazivna frekvenca vhoda/vhodov med 0 Hz in 1500 Hz; b) če je merilni pretvornik del sistema za merjenje neelektrične veličine, se lahko ta standard uporablja za električni merilni pretvornik, če sicer spada na področje uporabe tega standarda; c) za pretvornike, ki se uporabljajo za različne namene, kot sta telemetrija in kontrola procesa, ter v enem od številnih opredeljenih okolij. Ta mednarodni standard je namenjen: – določanju terminologije in opredelitev v zvezi s pretvorniki, ki se uporabljajo predvsem v industriji; – poenotenju preskusnih metod za ocenjevanje lastnosti pretvornika; – opredelitvi mejnih vrednosti točnosti in izhodnih vrednosti za pretvornike.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2013
1DGRPHãþD
SIST EN 60688:1995
SIST EN 60688:1995/A1:2001
SIST EN 60688:1995/A2:2002
(OHNWULþQLPHULOQLSUHWYRUQLNL]DSUHWYDUMDQMHL]PHQLþQLKHOHNWULþQLKYHOLþLQY
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Electrical measuring transducers for converting a.c. electrical quantities to analogue or
digital signals (IEC 60688:2012)
Elektrische Messumformer zur Umwandlung von elektrischen Wechselstromgrößen und
Gleichstromgrößen in analoge oder digitale Signale (IEC 60688:2012)
Transducteurs électriques de mesure convertissant les grandeurs électriques
alternatives en signaux analogiques ou numériques (CEI 60688:2012)
Ta slovenski standard je istoveten z: EN 60688:2013
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60688
NORME EUROPÉENNE
January 2013
EUROPÄISCHE NORM
ICS 17.220.20 Supersedes EN 60688:1992 + A1:1999 + A2:2001
English version
Electrical measuring transducers for converting A.C. and D.C. electrical
quantities to analogue or digital signals
(IEC 60688:2012)
Transducteurs électriques de mesure Elektrische Messumformer
convertissant les grandeurs électriques zur Umwandlung von elektrischen
alternatives ou continues en signaux Wechselstromgrößen
analogiques ou numériques und Gleichstromgrößen in analoge
(CEI 60688:2012) oder digitale Signale
(IEC 60688:2012)
This European Standard was approved by CENELEC on 2012-11-23. 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60688:2013 E
Foreword
The text of document 85/421/FDIS, future edition 3 of IEC 60688, 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 60688:2013.
The following dates are fixed:
(dop) 2013-08-23
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-11-23
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60688:1992 + A1:1999 + A2:2001.
A1:1999 + A2:2001:
- extending the scope to DC quantities;
- extending the scope to harmonics, total harmonic distortion and apparent power;
- adaptation of the requirements for digital transducers;
- updating normative references;
- updating safety requirements with the EN 61010 series;
- updating EMC requirements with EN 61326-1.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice
The text of the International Standard IEC 60688:2012 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 standards indicated:
IEC 60044-7 NOTE Harmonised as EN 60044-7.
IEC 60044-8 NOTE Harmonised as EN 60044-8.
IEC 60051 Series NOTE Harmonised as EN 60051 Series (not modified).
IEC 60068-2-30 NOTE Harmonised as EN 60068-2-30.
IEC 60359 NOTE Harmonised as EN 60359.
IEC 60770-1 NOTE Harmonised as EN 60770-1.
IEC 60770-2 NOTE Harmonised as EN 60770-2.
IEC 60770-3 NOTE Harmonised as EN 60770-3.
- 3 - EN 60688:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60051-1 1997 Direct acting indicating analogue EN 60051-1 1998
electrical measuring instruments
and their accessories -
Part 1: Definitions and general requirements
common to all parts
IEC 60068-2-6 - Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-27 - Environmental testing - EN 60068-2-27 -
Part 2-27: Tests - Test Ea and guidance:
Shock
IEC 60255-151 - Measuring relays and protection EN 60255-151 -
equipment -
Part 151: Functional requirements
for over/under current protection
IEC 61010 Series Safety requirements for electrical EN 61010 Series
equipment for measurement, control,
and laboratory use
IEC 61010-1 - Safety requirements for electrical EN 61010-1 -
equipment for measurement, control
and laboratory use -
Part 1: General requirements
IEC 61010-2-030 - Safety requirements for electrical EN 61010-2-030 -
equipment for measurement, control
and laboratory use -
Part 2-030: Particular requirements for
testing and measuring circuits
IEC 61326 Series Electrical equipment for measurement, EN 61326 Series
control and laboratory use -
EMC requirements
IEC 61326-1 - Electrical equipment for measurement, EN 61326-1 -
control and laboratory use -
EMC requirements -
Part 1: General requirements
IEC 61557-12 - Electrical safety in low voltage distribution EN 61557-12 -
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 12: Performance measuring and
monitoring devices (PMD)
IEC 60417-DB Graphical symbols for use on equipment - -
IEC 60688 ®
Edition 3.0 2012-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical measuring transducers for converting A.C. and D.C. 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
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 17.220.20 ISBN 978-2-83220-435-1
– 2 – 60688 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
3.1 General terms . 8
3.2 Description of transducers according to the measurand . 11
3.3 Description of transducers according to their output load . 12
3.4 Nominal values . 12
3.5 User adjustment . 13
3.6 Influence quantities and reference conditions . 14
3.7 Errors and variations . 14
3.8 Accuracy, accuracy class, class index . 14
4 Class index, permissible limits of intrinsic error, auxiliary supply and reference
conditions . 15
4.1 Transducer general architecture . 15
4.2 Class index . 15
4.3 Class index for transducer used with sensors . 16
4.4 Intrinsic error . 16
4.5 Conditions for the determination of intrinsic error . 16
4.6 Auxiliary supply . 18
4.7 Safety requirements: Clearances and creepage distances . 19
5 Requirements . 19
5.1 Input values . 19
5.2 Analogue output signals . 19
5.3 Output transfer function . 20
5.4 Digital output signals . 23
5.5 Ripple (for analogue outputs) . 23
5.6 Response time . 23
5.7 Variation due to over-range of the measurand . 23
5.8 Limiting value of the output signal . 23
5.9 Limiting conditions of operation . 23
5.10 Limits of the measuring range . 24
5.11 Limiting conditions for storage and transport . 24
5.12 Sealing . 24
5.13 Stability . 24
Tests . 24
6.1 General . 24
6.2 Variations due to auxiliary supply voltage . 25
6.3 Variations due to auxiliary supply frequency . 26
6.4 Variations due to ambient temperature . 27
6.5 Variations due to the frequency of the input quantity(ies) . 27
6.6 Variations due to the input voltage . 28
6.7 Variations due to the input current . 29
6.8 Variations due to power factor . 29
6.9 Variation due to output load . 30
60688 © IEC:2012 – 3 –
6.10 Variations due to distortion of the input quantity(ies) . 30
6.11 Variation due to magnetic field of external origin .
...
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