SIST EN IEC 61010-2-030:2021

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits (IEC 61010-2-030:2017)

This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and
lSO/lEC Guide 51.
This part of IEC 61010 specifies safety requirements for equipment having testing or
measuring circuits which are connected for test or measurement purposes to devices or
circuits outside the measurement equipment itself.
These include measuring circuits which are part of electrical test and measurement
equipment, laboratory equipment, or process control equipment. The existence of these
circuits in equipment requires additional protective means between the circuit and an
OPERATOR.
NOTE These testing and measuring circuits can, for example:
– measure voltages in circuits of other equipment,
– measure temperature of a separate device via a thermocouple,
– measure force on a separate device via a strain gauge,
– inject a voltage onto a circuit to analyse a new design.
Equipment having these testing and measuring circuits may be intended for performing tests
and measurements on hazardous conductors, including MAINS conductors and
telecommunication network conductors. See Annex BB for considerations of HAZARDS involved
in various tests and measurements.

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2-030: Besondere Bestimmungen für Prüf- und Messstromkreise (IEC 61010-2-030:2017)

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-030: Exigences particulières pour les circuits de test et de mesure (IEC 61010-2-030:2017)

NEW!IEC 61010-2-030:2017 est disponible sous forme de IEC 61010-2-030:2017 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 61010-2-030:2017 La présente publication groupée de sécurité est avant tout destinée à être utilisée en tant que norme en matière de sécurité des produits pour les produits cités dans le domaine d'application. Elle doit également être utilisée par les comités d'études dans le cadre de l'élaboration de leurs publications pour des produits similaires à ceux cités dans le domaine d'application de la présente norme, conformément aux principes établis dans le Guide IEC 104 et le Guide ISO/IEC 51.
La présente partie de l'IEC 61010 spécifie les exigences de sécurité pour les appareils équipés de circuits d'essai ou de mesure qui sont reliés à des fins d'essai ou de mesurage à des dispositifs ou à des circuits extérieurs à l'appareil de mesure.
Ceux-ci comprennent les circuits de mesure qui font partie d'appareils électriques d'essai et de mesure, d'appareils de laboratoire ou d'appareils de contrôle de processus. L’existence de ces circuits dans l'appareil exige des moyens de protection additionnels entre le circuit et un opérateur.
Cette deuxième édition annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:

   
1. 
         Une référence à l’IEC 61010-031 pour les sondes équipées et à l’IEC 61010-2-032 pour les capteurs de courant a été ajoutée.

   
2. 
         La liaison indirecte pour les circuits d’essai et de mesure a été modifiée, notamment pour prendre en compte la durée de l’écoulement du courant par rapport au courant passant par le corps pour le courant alternatif et le courant continu conformément à l’IEC TS 60479-1 et l’IEC TS 60479-2.

   
3. 
         Des lignes de fuite et distances d'isolement pour les emplacements humides et pour la borne du circuit de mesure de tension supérieure à 1000 V en courant alternatif ou en courant continu ont été spécifiées.

   
4. 
         La source de tension pour les essais du composant ou du circuit de limitation des surtensions peut être limitée à 400 V.

   
5. 
         Des exigences relatives aux surtensions transitoires applicables aux circuits de mesure de la tension réseau ont été ajoutées.

   
6. 
         Des exigences applicables aux circuits de mesure entre 1 000 V et 1 500 V en courant continu ont été ajoutées.

   
7. 
         Le corrigendum a été inclus dans les Tableaux K.102 à K.104.

   
8. 
         Les exigences applicables à la réduction des surtensions transitoires ont été modifiées.

   
9. 
         Une Annexe CC informative relative aux dimensions des bornes «banane» a été ajoutée.

   
10. 
          Un organigramme de l’isolation selon le type de circuit a été ajouté dans une nouvelle Annexe DD.

Elle a le statut d'une publication groupée de sécurité conformément au Gu

Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko uporabo - 2-030. del: Posebne zahteve za preskusna in merilna vezja (IEC 61010-2-030:2017)

General Information

• Status: Published
• Publication Date: 25-May-2021
• ICS: 19.080 - Electrical and electronic testing
• ICS: 71.040.10 - Chemical laboratories. Laboratory equipment
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Apr-2021
• Due Date: 19-Jun-2021
• Completion Date: 26-May-2021
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• 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/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: EN IEC 61010-2-030:2021 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits

Relations

• Revised: kSIST FprEN 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
• Effective Date: 24-May-2022
• Replaces: SIST EN 61010-2-030:2010 - Safety requirements for electrical equipment for measurement, control and laboratory use - Part 2-030: Particular requirements for testing and measuring circuits (IEC 61010-2-030:2010)
• Effective Date: 13-Apr-2021
• Amended By: SIST EN IEC 61010-2-030:2021/A11:2021 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits
• Effective Date: 15-Apr-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61010-2-030:2021
01-julij-2021
Nadomešča:
SIST EN 61010-2-030:2010
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-030. del: Posebne zahteve za preskusna in merilna vezja (IEC 61010-2-
030:2017)
Safety requirements for electrical equipment for measurement, control, and laboratory
use - Part 2-030: Particular requirements for equipment having testing or measuring
circuits (IEC 61010-2-030:2017)
Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2
-030: Besondere Bestimmungen für Prüf- und Messstromkreise (IEC 61010-2-030:2017)
Règles de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire - Partie 2-030: Exigences particulières pour les circuits de test et de mesure
(IEC 61010-2-030:2017)
Ta slovenski standard je istoveten z: EN IEC 61010-2-030:2021
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
SIST EN IEC 61010-2-030:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61010-2-030:2021

---------------------- Page: 2 ----------------------
SIST EN IEC 61010-2-030:2021


EUROPEAN STANDARD EN IEC 61010-2-030

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2021
ICS 19.080; 71.040.10 Supersedes EN 61010-2-030:2010 and all of its
amendments and corrigenda (if any)
English Version
Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-030: Particular requirements
for equipment having testing or measuring circuits
(IEC 61010-2-030:2017)
Exigences de sécurité pour appareils électriques de Sicherheitsbestimmungen für elektrische Mess-, Steuer-,
mesurage, de régulation et de laboratoire - Partie 2-030: Regel- und Laborgeräte - Teil 2-030: Besondere
Exigences particulières pour les appareils équipés de Anforderungen für Geräte mit Prüf- oder Messstromkreis
circuits d'essai ou de mesure (IEC 61010-2-030:2017)
(IEC 61010-2-030:2017)
This European Standard was approved by CENELEC on 2017-02-16. 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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61010-2-030:2021 E

---------------------- Page: 3 ----------------------
SIST EN IEC 61010-2-030:2021
EN IEC 61010-2-030:2021 (E)
European foreword
The text of document 66/613/FDIS, future edition 2 of IEC 61010-2-030, prepared by IEC/TC 66
"Safety of measuring, control and laboratory equipment" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN IEC 61010-2-030:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-10-02
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-04-02
document have to be withdrawn

This document supersedes EN 61010-2-030:2010 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.
This document has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s).
For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of
EN IEC 61010-2-030:2021/A11:2021.
Endorsement notice
The text of the International Standard IEC 61010-2-030:2017 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61010-2-033 NOTE Harmonized as EN 61010-2-033


2

---------------------- Page: 4 ----------------------
SIST EN IEC 61010-2-030:2021




IEC 61010-2-030

®


Edition 2.0 2017-01




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside



GROUP SAFETY PUBLICATION

PUBLICATION GROUPÉE DE SÉCURITÉ






Safety requirements for electrical equipment for measurement, control, and

laboratory use –

Part 2-030: Particular requirements for equipment having testing or measuring


circuits



Exigences de sécurité pour appareils électriques de mesurage, de régulation


et de laboratoire –

Partie 2-030: Exigences particulières pour les appareils équipés de circuits

d'essai ou de mesure










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 19.080; 71.040.10 ISBN 978-2-8322-3791-5



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 5 ----------------------
SIST EN IEC 61010-2-030:2021
– 2 – IEC 61010-2-030:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Tests . 9
5 Marking and documentation . 9
6 Protection against electric shock . 11
7 Protection against mechanical HAZARDS . 15
8 Resistance to mechanical stresses . 15
9 Protection against the spread of fire . 15
10 Equipment temperature limits and resistance to heat . 16
11 Protection against HAZARDS from fluids and solid foreign objects . 16
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 16
13 Protection against liberated gases and substances, explosion and implosion . 16
14 Components and subassemblies . 16
15 Protection by interlocks . 17
16 HAZARDS resulting from application . 17
17 RISK assessment . 17
101 Measuring circuits . 17
Annexes . 23
Annex K (normative) Insulation requirements not covered by 6.7 . 23
Annex L (informative) Index of defined terms . 30
Annex AA (normative) MEASUREMENT CATEGORIES . 31
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 33
Annex CC (informative) 4 mm “banana” TERMINALS . 36
Annex DD (informative) Flowchart for insulation according to the type of circuit . 38
Bibliography . 41

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 13
Figure AA.1 – Example to identify the locations of measuring circuits . 32
Figure CC.1 – Recommended dimensions of 4 mm TERMINALS . 37
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 40

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS
with HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c . 14
Table 102 – Impulse voltages . 17
Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III
and IV . 24
Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II . 25

---------------------- Page: 6 ----------------------
SIST EN IEC 61010-2-030:2021
IEC 61010-2-030:2017 © IEC 2017 – 3 –
Table K.103 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY III . 26
Table K.104 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY IV . 26
Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits . 26
Table K.106 – Maximum TRANSIENT OVERVOLTAGES . 29
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 32

---------------------- Page: 7 ----------------------
SIST EN IEC 61010-2-030:2021
– 4 – IEC 61010-2-030:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment
having testing or measuring circuits

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 participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61010-2-030 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
It has the status of a group safety publication in accordance with IEC Guide 104.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Reference to IEC 61010-031 for probe assemblies and IEC 61010-032 for current sensors
has been added.

---------------------- Page: 8 ----------------------
SIST EN IEC 61010-2-030:2021
IEC 61010-2-030:2017 © IEC 2017 – 5 –
b) Indirect bonding for testing and measuring circuits has been modified, in particular to take
into account the duration of current flow versus body current for a.c. and d.c. currents
according to IEC TS 60479-1 and IEC TS 60479-2.
c) CLEARANCE and CREEPAGE DISTANCE for WET LOCATIONS and for measuring circuit TERMINAL
exceeding 1 000 V a.c. or d.c have been specified.
d) The voltage source for testing overvoltage limiting component or circuit may be limited to
400 V.
e) Requirements against TRANSIENT OVERVOLTAGES for MAINS voltage measuring circuits have
been added.
f) Requirements for measuring circuits from 1 000 V d.c. to 1 500 V d.c. have been added.
g) The corrigendum has been included in Tables K.102 to K.104.
h) Requirements for reduction of TRANSIENT OVERVOLTAGES have been modified.
i) An informative Annex CC about the dimensions of banana TERMINALS has been added.
j) Flowchart for insulation according to the type of circuit has been added in a new Annex
DD.
The text of this standard is based on the following documents:
FDIS Report on voting
66/613/FDIS 66/621/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This Part 2-030 is to be used in conjunction with the latest edition of IEC 61010-1. It was
established on the basis of the third edition (2010) of IEC 61010-1, including its amendment 1
(2016).
This Part 2-030 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for equipment having
testing or measuring circuits.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. Where this part states “addition”, “modification”, “replacement”, or
“deletion” the relevant requirement, test specification or note in Part 1 should be adapted
accordingly.
In this standard:
a) the following print types are used:
– requirements: in roman type;
NOTES: in small roman type;
–
– conformity and test: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS;
b) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered
starting from 101. Additional annexes are lettered starting from AA and additional list
items are lettered from aa).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 9 ----------------------
SIST EN IEC 61010-2-030:2021
– 6 – IEC 61010-2-030:2017 © IEC 2017
A list of all parts of the IEC 61010 series, under the general title Safety requirements for
electrical equipment for measurement, control, and laboratory use, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

---------------------- Page: 10 ----------------------
SIST EN IEC 61010-2-030:2021
IEC 61010-2-030:2017 © IEC 2017 – 7 –
INTRODUCTION
IEC 61010-1 specifies the safety requirements that are generally applicable to all equipment
within its scope. For certain types of equipment, the requirements of IEC 61010-1 and its
amendment will be supplemented or modified by the special requirements of one, or more
than one, particular Part 2 of the standard which are read in conjunction with the Part 1
requirements.
This Part 2-030 specifies the safety requirements for equipment with testing or measuring
circuits which are connected for test or measurement purposes to devices or circuits outside
the measurement equipment itself.
Part 2-032 specifies the safety requirements for HAND-HELD and hand-manipulated current
sensors (see Clause 1 of Part 2-032). Requirements of Part 2-030 have been included in Part
2-032. Equipment within the scopes of Part 2-030 and Part 2-032 are considered to be
covered by the requirements of Part 2-032.
Part 2-033 specifies the safety requirements for HAND-HELD MULTIMETERS and other METERS
that have a primary purpose of measuring voltage on a live MAINS. Requirements of Part 2-030
have been included in Part 2-033. Parts of equipment within the scopes of Part 2-030 and
Part 2-033 are considered to be covered by the requirements of Part 2-033.
Part 2-034 specifies the safety requirements for measurement equipment for insulation
resistance and test equipment for electric strength which are connected to units, lines or
circuits for test or measurement purposes. Requirements of Part 2-030 have been included in
Part 2-034. Equipment within the scopes of Part 2-030 and Part 2-034 are considered to be
covered by the requirements of Part 2-034.
However, for equipment within the scope of Part 2-032, Part 2-033 and Part 2-034, the
standards are read in conjunction.

---------------------- Page: 11 ----------------------
SIST EN IEC 61010-2-030:2021
– 8 – IEC 61010-2-030:2017 © IEC 2017
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment
having testing or measuring circuits



1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the text with the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and
lSO/lEC Guide 51.
This part of IEC 61010 specifies safety requirements for equipment having testing or
measuring circuits which are connected for test or measurement purposes to devices or
circuits outside the measurement equipment itself.
These include measuring circuits which are part of electrical test and measurement
equipment, laboratory equipment, or process control equipment. The existence of these
circuits in equipment requires additional protective means between the circuit and an
OPERATOR.
NOTE These testing and measuring circuits can, for example:
– measure voltages in circuits of other equipment,
– measure temperature of a separate device via a thermocouple,
– measure force on a separate device via a strain gauge,
– inject a voltage onto a circuit to analyse a new design.
Equipment having these testing and measuring circuits may be intended for performing tests
and measurements on hazardous conductors, including MAINS conductors and
telecommunication network conductors. See Annex BB for considerations of HAZARDS involved
in various tests and measurements.
2 Normative references
This clause of Part 1 is applicable except as follows:
Replacement:
Replace
IEC 60364-4-44, Low-voltage electrical installations – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances

---------------------- Page: 12 ----------------------
SIST EN IEC 61010-2-030:2021
IEC 61010-2-030:2017 © IEC 2017 – 9 –
with the following new reference:
IEC 60364-4-44:2007, Low-voltage electrical installations – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-4-44:2007/AMD1:2015
Addition:
Add the following new normative reference:
IEC 61010-2-032, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-032: Particular requirements for hand-held and hand-manipulated
current sensors for electrical test and measurement
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.5 Safety terms
Replacement:
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
low-voltage electricity supply system
Addition:
Add the following new definition:
3.5.101
MEASUREMENT CATEGORY
classification of testing and measuring circuits according to the type of MAINS to which they
are intended to be connected
Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current
levels, the location in the building installation where the test or measurement is to be made, and some forms of
energy limitation or transient protection included in the building installation. See Annex AA for more information.
4 Tests
This Clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.1.5 TERMINALS, connections and operating devices
Addition:
Add the following new subclause:

---------------------- Page: 13 ----------------------
SIST EN IEC 61010-2-030:2021
– 10 – IEC 61010-2-030:2017 © IEC 2017
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General
Except as permitted in 5.1.5.101.4:
a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked,
and
b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of
measuring circuit TERMINALS that are intended to be used together shall be marked, and
c) the pertinent MEASUREMENT CATEGORY for each individual pair or set of measuring circuit
TERMINALS or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and
5.1.5.101.3, if applicable.
Measuring circuit TERMINALS are usually supplied in pairs or sets. Each pair or set of
TERMINALS may have a RATED voltage or a RATED current, or both, within that set, and each
individual TERMINAL may have a RATED voltage to earth. For some equipment, the RATED
voltage between TERMINALS may be different from the RATED voltage to earth. Markings shall
be clear to avoid misunderstanding.
Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for
connection to current transformers without internal protection (see 101.2).
Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space (as
in multi-input equipment), the marking may be on the RATING plate or scale plate, or the
TERMINAL may be marked with symbol 14 of Table 1.
For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be marked
TERMINALS.
more than once, if it is close to the
Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2 and
5.1.5.101.3, taking the exceptions in 5.1.5.101.4 into account.
5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES II, III or IV
The relevant MEASUREMENT CATEGORY shall be marked for measuring circuit TERMINALS RATED
for measurements within MEASUREMENT CATEGORIES II, III or IV. The MEASUREMENT CATEGORY
markings shall be “CAT II”, “CAT III” or “CAT IV” as applicable.
Marking more than one type of MEASUREMENT CATEGORY and its RATED voltage to earth is
permissible.
Conformity is checked by inspection.
5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
levels of 6.3.1
Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to
voltages above the levels of 6.3.1, but that are not RATED for measurements within
MEASUREMENT CATEGORIES II, III or IV (see also 5.4.1 bb)).
Conformity is checked by inspection.
5.1.5.101.4 Permanently connected, dedicated, or low voltage measuring circuit
TERMINALS
Measuring circuit TERMINALS do not need to be marked if:

---------------------- Page: 14 ----------------------
SIST EN IEC 61010-2-030:2021
IEC 61010-2-030:2017 © IEC 2017 – 11 –
a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa) and
bb)), or
b) they are dedicated only for connection to specific TERMINALS of other equipment, or
c) it is obvious from other indications that the RATED voltage is below the levels of 6.3.1.
NOTE Examples of acceptable indications that the inputs are intended to be below the levels of 6.3.1 include:
– the full scale deflection marking of a single-range indicating voltmeter or ammeter or maximum marking of
a multi-range multimeter;
– the maximum range marking of a voltage selector switch;
– a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in
the documentation, is below 30 V a.c.
Conformity is checked by inspection.
5.4.1 General
Addition:
Add the following new items to the list and a new paragraph:
aa) information about each relevant MEASUREMENT CATEGORY if the measuring circui
...