SIST EN IEC 62271-215:2021

SLOVENSKI STANDARD
01-november-2021
Visokonapetostne stikalne in krmilne naprave - 215. del: Fazni primerjalnik,
uporabljen z VDIS (IEC 62271-215:2021)
High-voltage switchgear and controlgear - Part 215: Phase comparator used with VDIS
(IEC 62271-215:2021)
Hochspannungs-Schaltgeräte und -Schaltanlagen – Teil 215: Phasenvergleicher (IEC
62271-215:2021)
Appareillage à haute tension - Partie 215: Comparateur de phase utilisé avec un VDIS
(IEC 62271-215:2021)
Ta slovenski standard je istoveten z: EN IEC 62271-215:2021
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62271-215

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 13.260; 29.130.10; 29.240.20

English Version
High-voltage switchgear and controlgear - Part 215: Phase
comparator used with VDIS
(IEC 62271-215:2021)
Appareillage à haute tension - Partie 215: Comparateur de Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil
phase utilisé avec un VDIS 215: Phasenvergleicher in Kombination mit einem
(IEC 62271-215:2021) Spannungsprüf- und -anzeigegerät
(IEC 62271-215:2021)
This European Standard was approved by CENELEC on 2021-08-03. 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 62271-215:2021 E

European foreword
The text of document 17C/788/FDIS, future edition 1 of IEC 62271-215, prepared by SC 17C
“Assemblies” of IEC/TC 17 “High-voltage switchgear and controlgear” was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62271-215:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–05–03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–08–03
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 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 62271-215:2021 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 61481-1:2014 NOTE Harmonized as EN 61481-1:2014 (not modified)
IEC 61481-2:2014 NOTE Harmonized as EN 61481-2:2014 (not modified)
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60060-1 - High-voltage test techniques - Part 1: EN 60060-1 -
General definitions and test requirements
IEC 60068-2-1 2007 Environmental testing - Part 2–1: Tests - EN 60068-2-1 2007
Test A: Cold
IEC 60068-2-2 2007 Environmental testing - Part 2–2: Tests - EN 60068-2-2 2007
Test B: Dry heat
IEC 60068-2-6 - Environmental testing - Part 2–6: Tests - EN 60068-2-6 -
Test Fc: Vibration (sinusoidal)
IEC 60068-2-31 - Environmental testing - Part 2–31: Tests - EN 60068-2-31 -
Test Ec: Rough handling shocks, primarily
for equipment-type specimens
IEC 60068-2-38 - Environmental testing - Part 2–38: Tests - EN IEC 60068-2-38 -
Test Z/AD: Composite
temperature/humidity cyclic test
IEC 60417 - Graphical symbols for use on equipment - -
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 61000-4-2 - Electromagnetic compatibility (EMC) - Part EN 61000-4-2 -
4–2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-3 -
4–3: Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-5 - Electromagnetic compatibility (EMC) - Part EN 61000-4-5 -
4–5: Testing and measurement techniques
- Surge immunity test
IEC 62262 - Degrees of protection provided by EN 62262 -
enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62271-1 - High-voltage switchgear and controlgear - EN 62271-1 -
Part 1: Common specifications
IEC 62271-213 - High-voltage switchgear and controlgear - - -
Part 213: Voltage detecting and indicating
system
IEC 62271-215 ®
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –

Part 215: Phase comparator used with VDIS

Appareillage à haute tension –

Partie 215: Comparateur de phase utilisé avec un VDIS

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.260; 29.130.10; 29.240.20 ISBN 978-2-8322-9892-3

– 2 – IEC 62271-215:2021  IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Normal and special service conditions . 13
4.1 Normal service conditions . 13
4.2 Special service conditions . 13
5 Ratings . 13
6 Design and construction . 13
6.1 General . 13
6.2 Parts of phase comparator . 13
6.3 Phase comparator description . 14
6.3.1 General . 14
6.3.2 Phase comparator for simultaneous connected operation . 14
6.3.3 Phase comparator for sequential connected operation . 15
6.4 Connection to VDIS . 15
6.5 Indication and perceptibility . 16
6.5.1 General . 16
6.5.2 Phase comparator providing only one active signal . 17
6.5.3 Phase comparator providing two or more active signals . 17
6.5.4 Indication of phase comparator with built-in power supply . 17
6.5.5 Indication of sequential phase comparators . 17
6.5.6 Response time of indication . 17
6.5.7 Perceptibility . 18
6.6 Phase comparator with built-in power supply . 18
6.7 Testing element . 18
6.8 Additional functions. 18
6.9 Probes . 18
6.10 Settings . 19
6.11 Tolerance of rated frequency . 20
6.12 Frequency shift of phase comparators with sequential operation . 20
6.13 Degree of protection (IP code) . 20
6.14 Climatic requirements . 20
6.14.1 General . 20
6.14.2 Temperature . 20
6.14.3 Composite temperature/humidity . 20
6.15 Mechanical requirements . 20
6.15.1 General . 20
6.15.2 Assembly . 20
6.15.3 Vibrations . 20
6.15.4 Mechanical impact (IK code) . 21
6.15.5 Fall . 21
6.16 Electromagnetic compatibility . 21
6.16.1 General . 21
6.16.2 Electrostatic discharge . 21

IEC 62271-215:2021  IEC 2021 – 3 –
6.16.3 Immunity against radiated electromagnetic fields . 21
6.17 Dielectric strength . 21
6.17.1 General . 21
6.17.2 Lightning impulse withstand voltage. 21
6.17.3 Power-frequency withstand voltage . 21
6.17.4 Insulation withstand voltage . 22
6.18 Marking . 22
7 Type tests . 22
7.1 General . 22
7.1.1 Information to be included in the type test report . 22
7.1.2 Test conditions . 22
7.1.3 List of tests . 23
7.2 Test values . 24
7.3 Inspection . 24
7.4 Dielectric tests . 24
7.4.1 General . 24
7.4.2 Lightning impulse voltage test. 24
7.4.3 Power-frequency voltage test . 25
7.4.4 Voltage withstand test of the phase comparator . 25
7.5 Indication and perceptibility . 25
7.5.1 Test set-up and procedure for clear indication . 25
7.5.2 Test for correct phase relationship . 26
7.5.3 Test for incorrect phase relationship . 27
7.5.4 Absence of voltage on one VDIS . 27
7.5.5 Absence of voltage on both VDIS . 27
7.5.6 Test of impedance of the phase comparator . 27
7.6 Test for maximum phase rotation . 28
7.6.1 Test set-up for maximum phase rotation with capacitive coupling
element . 28
7.6.2 Test set-up for maximum phase rotation with resistive coupling element . 28
7.6.3 Test result for maximum phase rotation . 29
7.7 Tolerance of rated frequency . 29
7.7.1 Test set-up . 29
7.7.2 Test procedure . 30
7.8 Frequency shift for sequential operation phase comparator. 30
7.8.1 Test set-up . 30
7.8.2 Test procedure . 30
7.9 Response time . 30
7.9.1 Test set-up . 30
7.9.2 Procedure . 31
7.10 Clear perceptibility of visual indication . 31
7.10.1 General . 31
7.10.2 Test set-up . 31
7.10.3 Procedure . 32
7.11 Test for frequency selection (where relevant) . 32
7.12 Temperature dependence of indication . 32
7.13 Composite temperature/humidity cyclic test . 33
7.14 Degree of protection (IP code) . 33
7.15 Vibrations . 33

– 4 – IEC 62271-215:2021  IEC 2021
7.16 Mechanical impact (IK code) . 33
7.17 Fall . 33
7.18 Electrostatic discharge . 33
7.19 Radiated electromagnetic fields . 34
7.20 Phase comparator when built-in power supply is exhausted . 34
7.20.1 Preparation . 34
7.20.2 Operation . 34
7.21 Efficiency of testing element . 34
7.21.1 Preparation . 34
7.21.2 Operation . 34
7.22 Durability of marking . 35
8 Routine tests . 35
9 Guide to the selection of phase comparator (informative) . 35
10 Information to be given with enquiries, tenders and orders (informative) . 35
10.1 General . 35
10.2 Information with enquiries and orders . 35
10.3 Information with tenders . 36
11 Transport, storage, installation, operation, maintenance and instructions for use . 36
11.1 General . 36
11.2 Instructions for use . 36
11.3 Maintenance . 37
11.3.1 General . 37
11.3.2 Maintenance period . 37
11.3.3 Maintenance by testing . 37
12 Safety . 37
13 Influence of the phase comparator on the environment . 37
Annex A (informative) Example of design . 38
A.1 General . 38
A.2 Wireless connection . 38
Annex B (informative) Example of use . 39
Bibliography . 40

Figure 1 – Example of typical structure of simultaneous operating phase comparator . 14
Figure 2 – Simultaneous connected operation with two earth connections . 14
Figure 3 – Simultaneous connected operation with one earth connection . 15
Figure 4 – Example of typical structure of sequential operating phase comparator . 15
Figure 5 – Sequential connected operation . 15
Figure 6 – Classes of phase comparators with only positive angle values shown . 16
Figure 7 – Plug size and design without insulation shield . 19
Figure 8 – Plug size and design with insulation shield . 19
Figure 9 – Connection of test set-up for clear indication . 26
Figure 10 – Connection of test set-up for clear indication for sequential operation . 26
Figure 11 – Connection of test set-up for phase rotation . 28
Figure 12 – Connection of test set-up for phase rotation for sequential operation . 28
Figure 13 – Connection of test set-up for phase rotation . 29
Figure 14 – Connection of test set-up for phase rotation for sequential operation . 29

IEC 62271-215:2021  IEC 2021 – 5 –
Figure 15 – Test set-up for perceptibility of visual indication . 32
Figure A.1 – Phase comparator with a wireless connection . 38

Table 1 – Sequence of type tests . 23
Table 2 – List of type tests without sequence . 24
Table 3 – List of routine tests . 35
Table B.1 – Results and conclusions of a cable checking. 39

– 6 – IEC 62271-215:2021  IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 215: Phase comparator used with VDIS

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 62271-215 has been prepared by sub-committee SC17C:
Assemblies, of IEC technical committee 17: High-voltage switchgear and controlgear in liaison
with IEC TC 78: Live working.
This first edition cancels and replaces the first edition of IEC 61243-5 published in 1997 and
the first edition of IEC 62271-206 published in 2011. This edition constitutes a merging of the
content of IEC 61243-5 and IEC 62271-206.
This edition includes the following significant technical changes with respect to the previous
editions of IEC 61243-5 and IEC 62271-206:
a) the document does not include the specific phase comparators (SPCs) as defined in
IEC 61243-5, which was specific to manufacturers, and takes back the technical principles
of the universal phase comparator (UPC) for VDIS of all manufacturers;
b) the phase comparator for sequential connected operation is introduced to facilitate the
operation of phase comparation of large MV panels.

IEC 62271-215:2021  IEC 2021 – 7 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
17C/788/FDIS 17C/795/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard is to be used in conjunction with IEC 62271-13:2021.
In this document, the following print types are used:
• Terms defined in Clause 3: in italic type.
A list of all parts in the IEC 62271 series, published under the general title High-voltage
switchgear and controlgear, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.

– 8 – IEC 62271-215:2021  IEC 2021
INTRODUCTION
This part of IEC 62271 has been prepared based on IEC 62271-1 and is linked to IEC 62271-
213 for its functionality.
The products designed and manufactured in accordance with this document contribute to the
safety of the users, provided they are used by skilled or instructed persons, in accordance with
safe methods of work and the instructions for use.
The product covered by this document can have an impact on the environment during some or
all stages of its life cycle. These impacts can range from slight to significant, be of short-term
or long-term duration, and occur at the global, regional or local level.
The principle of phase comparison is compatible with the one developed by IEC TC 78 in the
standard IEC 61481-1.
IEC 62271-215:2021  IEC 2021 – 9 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 215: Phase comparator used with VDIS

1 Scope
This part of IEC 62271 is applicable to phase comparators designed to be plugged into the
testing points of a voltage detecting and indicating system (VDIS) according to IEC 62271-213,
to give an indication of the result of a phase comparison.
The main usage is to provide clear evidence of the phase relationship between two energized
parts of a high-voltage network, at the same nominal voltage and frequency before coupling
them.
This document or parts of the document can also be applied to the phase comparison function
of other devices connected to the VDIS upon agreement between manufacturer and user.
This document does not cover phase comparators to be used directly on bare parts of live
electrical installation at the nominal voltage of the networks. These phase comparators are
covered by IEC 61481-1 and IEC 61481-2.
2 Normative references
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.
IEC 60060-1, High-voltage test techniques – Part 1: General definitions and requirements
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-38, Environmental testing – Part 2-38: Tests – Test Z/AD: Composite
temperature/humidity cyclic test
IEC 60417, Graphical symbols for use on equipment
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test

– 10 – IEC 62271-215:2021  IEC 2021
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 62262, degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62271-1, High-voltage switchgear and controlgear – Part 1: Common specifications
IEC 62271-213, High-voltage switchgear and controlgear – Part 213: Voltage detecting and
indicating system
3 Terms and definitions
For the purposes of this document, the following terms, definitions and symbols apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
active signal
visual (optionally audible) phenomenon, whose presence, absence or variation is considered
as representing a specific state, for example the phase comparison result
3.2
equipment
single apparatus or set of devices or apparatuses, or the set of main devices of an installation,
or all devices necessary to perform a specific task
[SOURCE: IEC 60050-151:2001 [1] , 151-11-25, modified – the Note is removed.]
3.3
front
part of VDIS accessible during functional operation
[SOURCE: IEC 62271-213:2021, 3.9]
3.4
indicator
part of the phase comparator which indicates the phase comparison result
3.5
input impedance
X
c
impedance of the input circuit measured between the input terminals of the phase comparator
under normal operating conditions
Note 1 to entry: The impedance can be expressed in terms of admittance.
Note 2 to entry: The impedance can be either linear or non-linear.
___________
Numbers in square brackets refer to the Bibliography.

IEC 62271-215:2021  IEC 2021 – 11 –
[SOURCE: IEC 60050-312:2001, 312-06-18 modified – Note 2 is removed and Note 3 is
simplified and becomes Note 2 to entry, and the symbol "X " has been added.]
c
3.6
maintenance test
test carried out periodically on an item to verify that its performance remains within specified
limits, after having made certain adjustments, if necessary
[SOURCE: IEC 60050-151:2001 [1], 151-16-25]
3.7
measuring voltage
value of the voltage measured at the testing point or the connecting point if it exists
[SOURCE: IEC 62271-213, 3.16]
3.8
memory holding time
Δt
maximum available time of the sequential operation phase comparator to contact the second
part to be compared, after the indication “memory ready” appears when the phase comparator
is in contact with the first part to be tested
[SOURCE: IEC 61481-1:2014, 3.20, modified – “Δt” added; “for a single-pole phase comparator"
removed; "of the sequential operation phase comparator" added.]
3.9
nominal voltage
U
n
value of the voltage by which the electrical installation or part of the electrical installation is
designated and identified
[SOURCE: IEC 60050-826:2004 [7], 826-11-01]
3.10
normal operating condition
operating condition that represents as closely as possible the range of normal use that can
reasonably be expected
[SOURCE IEC 60050-903:2014 [8], 903-01-21]
3.11
phase comparator
diagnostic device used to provide clear evidence of the presence or the absence of the correct
phase relationship between two energized parts at the same nominal voltage and frequency
[SOURCE: IEC 60050-651:2014 [6], 651-24-03]
3.12
plug
accessory having pins designed to engage with the contacts of a socket-outlet, also
incorporating means for the electrical connection and mechanical retention of flexible cables or
cords
[SOURCE IEC 60050-442:1998 [4], 442-03-01]

– 12 – IEC 62271-215:2021  IEC 2021
3.13
probe
input device of a measuring instrument, generally made as a separate unit and connected to it
by means of flexible cable, which transmit the measurand in a suitable form.
[SOURCE: IEC 60050-313:2001 [3], 313-09-11]
3.14
rated value
value of a quantity used for specification purposes, established for a specified set of operating
conditions of a component, device, equipment or system
[SOURCE: IEC 60050-151:2001 [1], 151-16-08]
3.15
response time
delay between the time when the phase comparator makes contact with the second part to be
compared and the relevant indication of the result of a phase comparison
3.16
routine test
conformity test made on each individual item during or after manufacture
[SOURCE: IEC 60050-151:2001 [1], 151-16-17]
3.17
socket outlet
accessory having socket-contacts designed to engage with the pins of a plug and having
terminals for the connection of cables or cords
[SOURCE IEC 60050-442:1998 [4], 442-03-02]
3.18
testing element
built-in or external device or procedure, by means of which the functioning of the indicator can
be checked by the user
3.19
testing point
front accessible socket outlet of a VDIS, which provides access to the signal
[SOURCE: IEC 62271-213:2021, 3.29]
3.20
threshold parameter
φ
p
phase angle φ between two VDIS testing points voltage signals which causes a change of the
p
result of the phase comparison
3.21
type test
conformity test made on one or more items representative of the production
[SOURCE: IEC 60050-151:2001 [1], 151-16-16]

IEC 62271-215:2021  IEC 2021 – 13 –
3.22
voltage detecting and indicating system
VDIS
device used to detect and indicate the presence or absence of operating voltage and to deliver
a signal for other functions
Note 1 to entry: The other functions can be for example phase comparison or voltage measurement.
[SOURCE: IEC 62271-213:2021, 3.32]
4 Normal and special service conditions
4.1 Normal service conditions
Unless otherwise specified, the phase comparator is intended to be used in accordance with its
rated characteristics and the normal service conditions listed hereafter.
Operation under normal service conditions is covered by the type tests in accordance with this
document.
The normal service conditions are as follows:
a) the ambient air temperature is between -25 °C and +40 °C;
b) there is no influence from solar radiation;
c) the altitude does not exceed 1 000 m;
d) the average value of the relative humidity, measured over a period of 24 h, does not exceed
95 %.
4.2 Special service conditions
Special environmental conditions should be defined by agreement between the end user and
the manufacturer of the phase comparator.
5 Ratings
The following rating of the phase comparator shall be in accordance with the common ratings
of the VDIS to which it is connected:
– the preferred rated values of the frequency of the phase comparator are 16,7 Hz, 25 Hz, 50
Hz, 60 Hz.
6 Design and construction
6.1 General
The phase comparator is a portable device that shall be plugged into two VDIS testing points
to perform the phase comparison.
The phase comparator shall be designed and constructed according to the following
requirements:
6.2 Parts of phase comparator
A phase comparator shall include:
– an indicator;
– probes;
– 14 – IEC 62271-215:2021  IEC 2021
– a built-in power source (optional);
– a testing element, if a built-in power source is present.
A phase comparator may include additional functions according to 6.8.
6.3 Phase comparator description
6.3.1 General
Phase comparators are classified into two types of operation:
– simultaneous connected operation, by which the phase comparator is connected to two
VDIS at the same time;
– sequential connected operation, by which the phase comparator is connected to one VDIS
first, disconnected, and then connected to the other VDIS.
6.3.2 Phase comparator for simultaneous connected operation
The typical generic structure is described in the following Figure 1 for simultaneous operation.

Key
1 Phase comparator
2 Input signal plugs
3 Earth signals plugs
4 Indicator
Figure 1 – Example of typical structure of simultaneous operating phase comparator
Figure 2 and Figure 3 show two examples of a phase comparator used with two earth
connections and one earth connection, respectively.

Figure 2 – Simultaneous connected operation with two earth connections

IEC 62271-215:2021  IEC 2021 – 15 –

Figure 3 – Simultaneous connected operation with one earth connection
An example of design of a simultaneous operating phase comparator is show in Annex A.
6.3.3 Phase comparator for sequential connected operation
Figure 4 shows a sequential connected system with one set of plugs.

Key
1 Phase comparator
2 Input signal plugs
3 Earth signal plugs
4 Indicator
Figure 4 – Example of typical structure of sequential operating phase comparator
Figure 5 shows one example of a phase comparator used in sequential operation.

Figure 5 – Sequential connected operation
6.4 Connection to VDIS
The phase comparator shall comply with the requirements of the VDIS testing points conditions
in accordance with IEC 62271-213:2021, 6.7.
The maximum measuring voltage can be 60 V AC at the testing points of VDIS.

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