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 16: Equipment for testing the effectiveness of the protective measures of electrical equipment and/or medical electrical equipment (IEC 61557-16:2014)

This part of IEC 61557 defines performance requirements for test and measurement
equipment to determine the effectiveness of the protective measures of electrical measures
for electrical equipment and/or medical electrical equipment described in IEC 62353.

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 16: Geräte zur Prüfung der Wirksamkeit der Schutzmassnahmen von elektrischen Geräten und/oder medizinisch elektrischen Geräten (IEC 61557-16:2014)

Sécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection - Partie 16: Équipement pour les essais de bon fonctionnement des mesures de protection de l'équipement électrique et/ou de l'équipement médical électrique (IEC 61557-16:2014)

L'IEC 61557-16:2014 définit les exigences de performance pour les matériels d'essai et de mesure pour déterminer l'efficacité des mesures de protection des mesures électriques pour les matériels électriques et/ou les matériels électriques médicaux décrits dans l'IEC 62353. La présente norme vise à obtenir des résultats de mesure comparables, une sécurité supplémentaire pour la personne réalisant les essais et une contrainte électrique négligeable pour l'unité soumise à essai. Mots clé: courant de fuite, partie appliquée au patient

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 kV in enosmerne napetosti do 1,5 kV - Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov - 16. del: Oprema za preskušanje učinkovitosti zaščitnih ukrepov električne opreme oziroma medicinske električne opreme (IEC 61557-16:2014)

General Information

Status
Published
Publication Date
18-May-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Feb-2015
Due Date
18-Apr-2015
Completion Date
19-May-2015

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SLOVENSKI STANDARD
SIST EN 61557-16:2015
01-junij-2015

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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 16:
Equipment for testing the effectiveness of the protective measures of electrical
equipment and/or medical electrical equipment (IEC 61557-16:2014)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 16: Geräte

zur Prüfung der Wirksamkeit der Schutzmassnahmen von elektrischen Geräten und/oder

medizinisch elektrischen Geräten (IEC 61557-16:2014)
Ta slovenski standard je istoveten z: EN 61557-16:2015
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.080.01 (OHNWULþQDL]RODFLMDQD Electrical insulation in
VSORãQR general
29.240.01 2PUHåMD]DSUHQRVLQ Power transmission and
GLVWULEXFLMRHOHNWULþQHHQHUJLMH distribution networks in
QDVSORãQR general
SIST EN 61557-16:2015 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61557-16:2015
---------------------- Page: 2 ----------------------
SIST EN 61557-16:2015
EUROPEAN STANDARD EN 61557-16
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2015
ICS 17.220.20; 29.080.01
English Version
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 16: Equipment for
testing the effectiveness of the protective measures of electrical
equipment and/or medical electrical equipment
(IEC 61557-16:2014)

Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen

tension de 1 000 V c.a. et 1 500 V c.c. - Dispositifs de bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen,

contrôle, de mesure ou de surveillance de mesures de Messen oder Überwachen von Schutzmaßnahmen -

protection - Partie 16: Équipement pour les essais de bon Teil 16: Geräte zur Prüfung der Wirksamkeit der

fonctionnement des mesures de protection de l'équipement Schutzmassnahmen von elektrischen Geräten und/oder

électrique et/ou de l'équipement médical électrique medizinisch elektrischen Geräten

(IEC 61557-16:2014) (IEC 61557-16:2014)

This European Standard was approved by CENELEC on 2015-01-15. 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.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61557-16:2015 E
---------------------- Page: 3 ----------------------
SIST EN 61557-16:2015
EN 61557-16:2015 - 2 -
Foreword
The text of document 85/487/FDIS, future edition 1 of IEC 61557-16, 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 61557-16:2015.
The following dates are fixed:
(dop) 2015-10-15
• 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) 2018-01-15
standards conflicting with the
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 [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 61557-16:2014 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 61557-16:2015
- 3 - EN 61557-16:2015
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 1 When 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.cenelec.eu
Publication Year Title EN/HD Year
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 61000-4-8 - Electromagnetic compatibility (EMC) - EN 61000-4-8 -
Part 4-8: Testing and measurement
techniques - Power frequency magnetic
field immunity test
IEC 61010-1 - Safety requirements for electrical EN 61010-1 -
equipment for measurement, control
and laboratory use -
Part 1: General requirements
IEC 61010-031 - Safety requirements for electrical EN 61010-031 -
equipment for measurement, control
and laboratory use -
Part 031: Safety requirements for hand-
held probe assemblies for electrical
measurement and test
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 61010-2-032 - Safety requirements for electrical EN 61010-2-032 -
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
IEC 61326-1 - Electrical equipment for measurement, EN 61326-1 -
control and laboratory use - EMC
requirements -
Part 1: General requirements
---------------------- Page: 5 ----------------------
SIST EN 61557-16:2015
EN 61557-16:2015 - 4 -
Publication Year Title EN/HD Year
IEC 61326-2-2 - Electrical equipment for measurement, EN 61326-2-2 -
control and laboratory use - EMC
requirements -
Part 2-2: Particular requirements - Test
configurations, operational conditions
and performance criteria for portable test,
measuring and monitoring equipment used
in low-voltage distribution systems
IEC 61557-1 2007 Electrical safety in low voltage distribution EN 61557-1 2007
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -
Part 1: General requirements
IEC 61557-2 - Electrical safety in low voltage distribution EN 61557-2 -
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -
Part 2: Insulation resistance
IEC 61557-4 2007 Electrical safety in low voltage distribution EN 61557-4 2007
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -
Part 4: Resistance of earth connection
and equipotential bonding
IEC 61557-10 - Electrical safety in low voltage distribution EN 61557-10 -
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -
Part 10: Combined measuring equipment
for testing, measuring or monitoring of
protective measures

IEC 61557-13 2011 Electrical safety in low voltage distribution EN 61557-13 2011

systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -
Part 13: Hand-held and hand-manipulated
current clamps and sensors for
measurement of leakage currents in
electrical distribution systems
IEC 62353 - Medical electrical equipment - Recurrent EN 62353 -
test and test after repair of medical
electrical equipment
---------------------- Page: 6 ----------------------
SIST EN 61557-16:2015
IEC 61557-16
Edition 1.0 2014-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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 16: Equipment for testing the effectiveness of the protective measures of
electrical equipment and/or medical electrical equipment
Sécurité électrique dans les réseaux de distribution basse tension de
1 000 V c.a. et 1 500 V c.c. – Dispositifs de contrôle, de mesure ou de
surveillance de mesures de protection –
Partie 16: Équipement pour les essais de bon fonctionnement des mesures de
protection de l'équipement électrique et/ou de l'équipement médical électrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 17.220.20; 29.080.01 ISBN 978-2-8322-1979-9

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: 7 ----------------------
SIST EN 61557-16:2015
– 2 – IEC 61557-16:2014 © IEC 2014
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 8

4 Requirements .................................................................................................................. 9

4.1 Measurement requirements for measuring equipment ............................................. 9

4.1.1 General ........................................................................................................... 9

4.1.2 Measurement of the resistance of the protective bonding or the

protective earth resistance ............................................................................... 9

4.1.3 Measurement of insulation resistance ............................................................ 10

4.1.4 Measurement of protective conductor current and/or equipment leakage

current with the alternative method ................................................................ 10

4.1.5 Measurement of touch current, patient leakage current and applied part

leakage current with the alternative method ................................................... 10

4.1.6 Measurement of protective conductor current and or equipment leakage

current with the direct method or differential method (residual method) ......... 11

4.1.7 Measurement of touch current, patient leakage current and applied part
leakage current with the direct method or differential method (residual

method) ......................................................................................................... 11

4.2 Construction requirements for testing equipment .................................................. 12

4.2.1 Overload capability ........................................................................................ 12

4.2.2 Terminals ...................................................................................................... 12

4.2.3 Sockets for service purposes ......................................................................... 12

4.2.4 Degree of protection ...................................................................................... 12

4.2.5 Class of protection ......................................................................................... 12

4.2.6 Resistance of protective bonding ................................................................... 12

4.2.7 Battery control ............................................................................................... 12

4.2.8 Mechanical requirements ............................................................................... 13

4.2.9 Pollution degree ............................................................................................ 13

4.2.10 Safety ............................................................................................................ 13

4.2.11 Electromagnetic compatibility (EMC) ............................................................. 13

4.2.12 Accessories ................................................................................................... 13

5 Markings and operating instructions .............................................................................. 13

5.1 Markings ............................................................................................................... 13

5.2 Operating instructions ........................................................................................... 14

6 Tests ............................................................................................................................. 14

6.1 General ................................................................................................................. 14

6.2 Operating uncertainty ............................................................................................ 14

6.3 Variations ............................................................................................................. 16

6.3.1 Variation due to position ................................................................................ 16

6.3.2 Variation due to supply voltage ...................................................................... 16

6.3.3 Variation due to temperature ......................................................................... 16

6.3.4 Variation due to harmonics ............................................................................ 16

6.3.5 Variations due to external low frequency magnetic field ................................. 16

6.3.6 Variations due to load current ........................................................................ 16

---------------------- Page: 8 ----------------------
SIST EN 61557-16:2015
IEC 61557-16:2014 © IEC 2014 – 3 –
6.3.7 Variations due to touch current caused by common mode voltage (if

applicable) ..................................................................................................... 16

6.3.8 Variations due to frequency of measured leakage current with direct

method or differential method ........................................................................ 17

6.3.9 Variations due to repeated clamping (if applicable) ........................................ 17

6.4 Tests of measuring circuits according to measuring functions ............................... 17

6.5 Test of construction requirements of test and measurement equipment ................. 17

Annex A (normative) Measuring circuit MD .......................................................................... 18

A.1 Current measuring circuit MD ................................................................................ 18

A.2 Frequency characteristic of current measuring circuit MD ..................................... 18

Figure A.1 – Example of a current measuring circuit MD ....................................................... 18

Figure A.2 – Example of a frequency characteristic of current measuring circuit MD ............ 19

Table 1 – Determination of operating uncertainty .................................................................. 15

Table 2 – Compliance tests of measuring circuits according to measuring function .............. 17

Table 3 – Compliance test of construction requirements of test and measuring

equipment ............................................................................................................................. 17

---------------------- Page: 9 ----------------------
SIST EN 61557-16:2015
– 4 – IEC 61557-16:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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 16: Equipment for testing the effectiveness of the protective
measures of electrical equipment and/or medical electrical equipment
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 61557-16 has been prepared by IEC technical committee 85:

Measuring equipment for electrical and electromagnetic quantities.
The text of this standard is based on the following documents:
FDIS Report on voting
85/487/FDIS 85/504/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 10 ----------------------
SIST EN 61557-16:2015
IEC 61557-16:2014 © IEC 2014 – 5 –
This part of IEC 61557 shall be used in conjunction with Part 1.

A list of all parts in the IEC 61557 series, published under the general title 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, 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 web site 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.
---------------------- Page: 11 ----------------------
SIST EN 61557-16:2015
– 6 – IEC 61557-16:2014 © IEC 2014
INTRODUCTION

This part of IEC 61557 defines performance requirements for measuring equipment using

measuring methods described in IEC 62353, especially for evaluation of leakage currents

within electrical equipment. It is the intention of this standard to achieve comparable

measuring results, additional safety for the testing person and negligible electrical stress for

the unit under test.
---------------------- Page: 12 ----------------------
SIST EN 61557-16:2015
IEC 61557-16:2014 © IEC 2014 – 7 –
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 16: Equipment for testing the effectiveness of the protective
measures of electrical equipment and/or medical electrical equipment
1 Scope
This part of IEC 61557 defines performance requirements for test and measurement

equipment to determine the effectiveness of the protective measures of electrical measures

for electrical equipment and/or medical electrical equipment described in IEC 62353.

2 Normative references

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.
IEC 60529, Degrees of protection provided by enclosures (IP Code)

IEC 61000-4-8, Electromagnetic compatibility (EMC) – Part 4-8: Testing and measurement

techniques – Power frequency magnetic field immunity test

IEC 61010-1, Safety requirements for electrical equipment for measurement, control, and

laboratory use – Part 1: General requirements

IEC 61010-031, Safety requirements for electrical equipment for measurement, control and

laboratory use – Part 031: Safety requirements for hand-held probe assemblies for electrical

measurement and test

IEC 61010-2-030, Safety requirements for electrical equipment for measurement, control, and

laboratory use – Part 2-030: Particular requirements for testing and measuring circuits

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

IEC 61326-1, Electrical equipment for measurement, control and laboratory use – EMC

requirements – Part 1: General requirements

IEC 61326-2-2, Electrical equipment for measurement, control and laboratory use – EMC

requirements – Part 2-2: Particular requirements – Test configurations, operational conditions

and performance criteria for portable test, measuring and monitoring equipment used in low-

voltage distribution systems

IEC 61557-1:2007, 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 1:

General requirements
---------------------- Page: 13 ----------------------
SIST EN 61557-16:2015
– 8 – IEC 61557-16:2014 © IEC 2014

IEC 61557-2, 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 2:

Insulation resistance

IEC 61557-4:2007, 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 4:

Resistance of earth connection and equipotential bonding

IEC 61557-10, 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

10: Combined measuring equipment for testing, measuring or monitoring of protective

measures

IEC 61557-13:2011, 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 13: Hand-held and hand-manipulated current clamps and sensors for measurement of

leakage currents in electrical distribution systems

IEC 62353, Medical electrical equipment – Recurrent test and test after repair of medical

electrical equipment
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61557-1,

IEC 61557-2, IEC 61557-4, IEC 61557-10 and, IEC 61557-13 (if applicable) and the following

apply.
3.1
test socket outlet

socket outlet on the test equipment for the unit under test, separated from the active parts of

the mains circuit by double insulation
3.2
mains socket outlet

socket outlet on the test equipment used to supply mains to the equipment under test

3.3
combined test-mains socket outlet

socket outlet on the test equipment that can be switched to either test-condition and/or supply

condition
3.4
service socket

socket outlet on the test equipment to supply mains to further test equipment or additional

equipment
3.5
test terminal
terminal used independently, in parallel or in combination, with the test socket
3.6
measuring circuit MD
electric circuit with defined components and defined frequency characteristic
3.7
peak factor

ratio of the maximum absolute value of an alternating quantity to its root-mean-square value

---------------------- Page: 14 ----------------------
SIST EN 61557-16:2015
IEC 61557-16:2014 © IEC 2014 – 9 –
[SOURCE: IEC 60050-103:2009, 103-06-15]
4 Requirements
4.1 Measurement requirements for measuring equipment
4.1.1 General

The measuring equipment shall be capable of measuring at least the following quantities:

– resistance of protective bonding and/or protective earth resistance,
– insulation resistance,
– protective conductor current and/or equipment leakage current,
– touch current and/or applied part leakage current.

The operating uncertainty for all measured parameters within the required ranges at the

applicable limits according to IEC 62353 shall be ± 15 % at the maximum. This requirement

shall be fulfilled for the measurement of leakage currents within a frequency range given by

the frequency characteristic of the measuring circuit MD.

If external current clamps are connected to the test and measurement equipment, they shall

comply with the requirements of IEC 61557-13 and their operating uncertainty shall be

included in the operating uncertainty of the measurement. In case of current clamps of class 2

and class 1 and external magnetic fields of 30 A/m and 1
...

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