Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for reactive energy at fundamental frequency (classes 0,5 S, 1S and 1)

IEC 62053-24:2014 applies only to newly manufactured transformer operated static var-hour meters of accuracy classes 0,5 S, and 1 S as well as direct connected static var-hour meters of accuracy class 1, for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It uses a conventional definition of reactive energy where the reactive power and energy is calculated from the fundamental frequency components of the currents and voltages only.

Equipement de comptage de l'éléctricité (c.a.) - Exigences particulières - Partie 24: Compteurs statiques d'énergie réactive à la fréquence fondamentale (classes 0,5 S, 1 S et 1)

L'IEC 62053-24:2014 est applicable uniquement aux compteurs d'énergie réactive statiques neufs des classes de précision 0,5 S et 1 S alimentés par transformateurs ainsi qu'aux compteurs d'énergie réactive statiques neufs à branchement direct de classe de précision 1, destinés à la mesure de l'énergie électrique réactive en courant alternatif sur les réseaux électriques en 50 Hz et 60 Hz, et à leurs essais de type. Elle est fondée sur une définition conventionnelle de l'énergie réactive pour laquelle la puissance et l'énergie réactives ne sont calculées qu'à partir des composantes de fréquence fondamentale des courants et des tensions.

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Publication Date
18-Jun-2014
Current Stage
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Completion Date
17-Jun-2020
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IEC 62053-24
Edition 1.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment (a.c.) – Particular requirements –
Part 24: Static meters for reactive energy at fundamental frequency (classes
0,5 S, 1 S and 1)
Équipement de comptage de l’électricité (c.a.) – Exigences particulières –
Partie 24: Compteurs statiques d’énergie réactive à la fréquence fondamentale
(classes 0,5 S, 1 S et 1)
IEC 62053-24:2014-06(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62053-24
Edition 1.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment (a.c.) – Particular requirements –
Part 24: Static meters for reactive energy at fundamental frequency (classes
0,5 S, 1 S and 1)
Équipement de comptage de l’électricité (c.a.) – Exigences particulières –
Partie 24: Compteurs statiques d’énergie réactive à la fréquence fondamentale
(classes 0,5 S, 1 S et 1)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 17.220.20; 91.140.50 ISBN 978-2-8322-1560-9

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: 3 ----------------------
– 2 – IEC 62053-24:2014 © IEC 2014
CONTENTS

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

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

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

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

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

4 Standard electrical values ............................................................................................... 8

5 Mechanical requirements ................................................................................................. 8

6 Climatic conditions .......................................................................................................... 8

7 Electrical requirements .................................................................................................... 8

7.1 General ................................................................................................................... 8

7.2 Power consumption................................................................................................. 9

7.2.1 General ........................................................................................................... 9

7.2.2 Voltage circuits ................................................................................................ 9

7.2.3 Current circuits ................................................................................................ 9

Influence of short-time overcurrents ........................................................................ 9

7.3

7.4 Influence of self-heating ........................................................................................ 10

7.5 AC voltage test ..................................................................................................... 11

8 Accuracy requirements .................................................................................................. 11

8.1 General ................................................................................................................. 11

8.2 Limits of error due to variation of the current ......................................................... 11

8.3 Limits of error due to influence quantities .............................................................. 12

8.3.1 General ......................................................................................................... 12

8.3.2 Tests of the influence of DC and even harmonics in the current circuit .......... 14

8.3.3 Continuous magnetic induction of external origin ........................................... 14

8.3.4 Harmonics ..................................................................................................... 14

8.4 Test of starting and no-load condition ................................................................... 15

8.4.1 General ......................................................................................................... 15

8.4.2 Initial start-up of the meter ............................................................................. 15

8.4.3 Test of no-load condition ............................................................................... 15

8.4.4 Starting.......................................................................................................... 16

8.5 Meter constant ...................................................................................................... 16

8.6 Accuracy test conditions ....................................................................................... 16

8.7 Interpretation of test results .................................................................................. 17

Annex A (normative) Test circuit diagram for DC and even harmonics ................................. 18

Annex B (normative) Electromagnet for testing the influence of externally produced

magnetic fields ..................................................................................................................... 20

Annex C (informative) Geometric representation of active and reactive power ..................... 21

Annex D (informative) Effect of phase displacement ............................................................ 23

D.1 Phase displacement and matching of current transformers and meters for

reactive energy ..................................................................................................... 23

Annex E (informative) Treatment of harmonics and tests for harmonics ............................... 24

E.1 Non-sinusoidal conditions and reactive power definition ........................................ 24

E.2 Tests for accuracy under non-sinusoidal conditions .............................................. 24

E.3 Fifth harmonic test ................................................................................................ 25

.......................................................................................................................... 26

Bibliography
---------------------- Page: 4 ----------------------
IEC 62053-24:2014 © IEC 2014 – 3 –

Figure A.1 – Test circuit diagram for half-wave rectification .................................................. 18

Figure A.2 – Half-wave rectified waveform ............................................................................ 19

Figure B.1 – Electromagnet for testing the influence of externally produced magnetic

fields..................................................................................................................................... 20

Figure C.1 – Recommended geometric representation .......................................................... 21

Figure C.2 – Alternative geometric representation ................................................................ 22

Table 1 – Power consumption in voltage circuits for single-phase and polyphase

meters including the power supply .......................................................................................... 9

Table 2 – Power consumption in current circuits ..................................................................... 9

Table 3 – Variations due to short-time overcurrents .............................................................. 10

Table 4 – Variations due to self-heating ................................................................................ 10

Table 5 – AC voltage tests .................................................................................................... 11

Table 6 – Percentage error limits (single-phase meters and polyphase meters with

balanced loads) .................................................................................................................... 12

Table 7 – Percentage error limits (polyphase meters carrying a single-phase load, but

with balanced polyphase voltages applied to voltage circuits) ............................................... 12

Table 8 – Influence quantities ............................................................................................... 13

Table 9 – Starting current ..................................................................................................... 16

Table 10 – Voltage and current balance ................................................................................ 16

Table 11 – Reference conditions ........................................................................................... 17

Table 12 – Interpretation of test results ................................................................................. 17

Table D.1 – Limits of phase displacement for measuring current transformers and

corresponding measurement error for reactive energy measurement .................................... 23

---------------------- Page: 5 ----------------------
– 4 – IEC 62053-24:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING EQUIPMENT (a.c.) –
PARTICULAR REQUIREMENTS –
Part 24: Static meters for reactive energy at fundamental frequency
(classes 0,5 S, 1 S and 1)
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

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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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 62053-24 has been prepared by IEC technical committee 13:

Electrical energy measurement and control.
The text of this standard is based on the following documents:
FDIS Report on voting
13/1569/FDIS 13/1578/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: 6 ----------------------
IEC 62053-24:2014 © IEC 2014 – 5 –

A list of all parts of IEC series 62053, under the general title Electricity metering equipment

(a.c.) – Particular requirements, 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: 7 ----------------------
– 6 – IEC 62053-24:2014 © IEC 2014
INTRODUCTION

This part of IEC 62053 is to be used with the following relevant parts of the IEC 62052,

IEC 62053 and IEC 62059 series, Electricity metering equipment:

IEC 62052-11:2003, Electricity metering equipment (a.c.) – General requirements, tests and

test conditions – Part 11: Metering equipment

IEC 62053-21:2003, Electricity metering equipment (a.c.) – Particular requirements – Part 21:

Static meters for active energy (classes 1 and 2)

IEC 62053-22:2003, Electricity metering equipment (a.c.) – Particular requirements – Part 22:

Static meters for active energy (classes 0,2 S and 0,5 S)

IEC 62053-31:1998, Electricity metering equipment (a.c.) – Particular requirements – Part 31:

Pulse output devices for electromechanical and electronic meters (two wires only)

IEC 62053-52:2005, Electricity metering equipment (a.c.) – Particular requirements – Part 52:

Symbols

IEC 62053-61:1998, Electricity metering equipment (a.c.) – Particular requirements – Part 61:

Power consumption and voltage requirements

IEC 62059-11:2002, Electricity metering equipment (a.c.) – Dependability – Part 11: General

concepts

IEC 62059-21:2002, Electricity metering equipment (a.c.) – Dependability – Part 21:

Collection of meter dependability data from the field

IEC 62059-31-1:2008, Electricity metering equipment – Dependability –Part 31-1: Accelerated

reliability testing – Elevated temperature and humidity

IEC 62059-32-1:2011, Electricity metering equipment – Dependability – Part 32-1: Durability –

Testing of the stability of metrological characteristics by applying elevated temperature

IEC 62059-41:2006, Electricity metering equipment – Dependability – Part 41: Reliability

prediction

This part is a standard for type testing electricity meters. It covers the particular requirements

for meters, used indoors and outdoors. It does not deal with special implementations (such as

metering-part and/or displays in separate housings).

This standard is intended to be used in conjunction with IEC 62052-11. When any requirement

in this standard concerns an item already covered in IEC 62052-11, the requirements of this

standard take precedence over the requirements of IEC 62052-11.
This standard distinguishes:

• between transformer operated meters of accuracy class index 0,5 S and 1 S and direct

connected meters of accuracy class index 1;
• between protective class I and protective class II meters;

• between meters for use in networks equipped with or without earth fault neutralizers.

The test levels are regarded as minimum values that provide for the proper functioning of the

meter under normal working conditions. For special application, other test levels might be

necessary and should be agreed on between the user and the manufacturer.
---------------------- Page: 8 ----------------------
IEC 62053-24:2014 © IEC 2014 – 7 –
ELECTRICITY METERING EQUIPMENT (a.c.) –
PARTICULAR REQUIREMENTS –
Part 24: Static meters for reactive energy at fundamental frequency
(classes 0,5 S, 1 S and 1)
1 Scope

This part of IEC 62053 applies only to newly manufactured transformer operated static var-

hour meters of accuracy classes 0,5 S, and 1 S as well as direct connected static var-hour

meters of accuracy class 1, for the measurement of alternating current electrical reactive

energy in 50 Hz or 60 Hz networks and it applies to their type tests only.

This standard uses a conventional definition of reactive energy where the reactive power and

energy is calculated from the fundamental frequency components of the currents and voltages

only. See Clause 3.

NOTE 1 This differs from the approach of IEC 62053-23, where reactive power and energy is defined only for

sinusoidal signals. In this standard reactive power and energy is defined for all periodic signals. Reactive power

and energy is defined in this way to achieve proper reproducibility of measurements with meters of different

designs. With this definition, reactive power and energy reflects the generally unnecessary current possible to

compensate with capacitors rather than the total unnecessary current.

It applies only to static var-hour meters for indoor and outdoor application consisting of a

measuring element and register(s) enclosed together in a meter case. It also applies to

operation indicator(s) and test output(s). If the meter has a measuring element for more than

one type of energy (multi-energy meters), or when other functional elements, like maximum

demand indicators, electronic tariff registers, time switches, ripple control receivers, data

communication interfaces, etc., are enclosed in the meter case, then the relevant standards

for these elements also apply.

NOTE 2 IEC 61869-2:2012 describes transformers having a measuring range of 0,05 I to I for accuracy

n max

classes 0,2, 0,5, 1 and 2, and transformers having a measuring range of 0,01 I to I for accuracy classes 0,2 S

n max

and 0,5 S. As the measuring range of a meter and its associated transformers have to be matched and as only

transformers of classes 0,2 S / 0,5 S have the current error and phase displacement characteristics suitable to

operate a class 0,5 S / 1 S meter respectively as specified in this standard, the measuring range of the transformer

operated meters will be 0,01 I to I . Reactive meters intended to be used together with non-S transformers are,

n max
therefore, not covered by this standard.
It does not apply to:

• var-hour meters where the voltage across the connection terminals exceeds 600 V (line-

to-line voltage for meters for polyphase systems);
• portable meters;
• data interfaces to the register of the meter;
• reference meters.
The dependability aspect is covered by the standards of the IEC 62059 series.
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.
---------------------- Page: 9 ----------------------
– 8 – IEC 62053-24:2014 © IEC 2014

IEC 62052-11:2003, Electricity metering equipment (a.c.) – General requirements, tests and

test conditions – Part 11: Metering equipment
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 62052-11 apply with

the following exception:
3.1
reactive power

reactive power Q in a single phase system is defined for steady-state and periodic signals as

Q = U ∗ I ∗sinϕ
1 1 1

where U and I are the r.m.s. values of the fundamental frequency components of the

1 1
voltage and the current respectively, and

φ is the phase angle between them. The reactive power in poly-phase system is the

algebraic sum of the per-phase reactive powers:
Q = U ∗ I ∗sinϕ +U ∗ I ∗sinϕ + .....
L1 L1 L1 L2 L2 L2
where
L1 and L2 are the first and second phase of the system.
Note 1 to entry: For direction of flow and sign of reactive power, see Annex C.

Note 2 to entry: The actual algorithm used for the calculation of reactive power is not of importance as long as the

meter meets requirements of this standard. See also Annex E.

Note 3 to entry: While meters for active energy have to measure active energy including harmonic components,

reactive energy meters according to this standard have to measure fundamental component reactive energy, with

minimum influence from harmonics.
4 Standard electrical values
The values given in IEC 62052-11 apply.
5 Mechanical requirements
The requirements of IEC 62052-11 apply.
6 Climatic conditions
The conditions given in IEC 62052-11 apply.
7 Electrical requirements
7.1 General

In addition to the electrical requirements in IEC 62052-11, meters shall fulfil the following

requirements.
---------------------- Page: 10 ----------------------
IEC 62053-24:2014 © IEC 2014 – 9 –
7.2 Power consumption
7.2.1 General

The power consumption in the voltage and current circuit shall be determined at reference

values of the influence quantities given in 8.6 by any suitable method. The overall uncertainty

of the measurement of the power consumption shall not exceed 5 %.
7.2.2 Voltage circuits

The active and apparent power consumption in each voltage circuit of a meter at reference

voltage, reference temperature and reference frequency shall not exceed the values shown in

Table 1.
Table 1 – Power consumption in voltage circuits for single-phase
and polyphase meters including the power supply
Meters Power supply connected Power supply not connected
to the voltage circuits to the voltage circuits
Voltage circuit 2 W and 10 VA 0,5 VA
Auxiliary power supply – 10 VA

NOTE 1 In order to match voltage transformers to meters, the meter manufacturer should state whether the

burden is inductive or capacitive (for transformer operated meters only).

NOTE 2 The above figures are mean values. Switching power supplies with peak values in excess of these

specified values are permitted, but it should be ensured that the rating of associated voltage transformers is

adequate.
NOTE 3 For multifunctional meters, see IEC 62053-61.
7.2.3 Current circuits

The apparent power taken by each current circuit of a direct connected meter at basic current,

reference frequency and reference temperature shall not exceed the values shown in Table 2.

The apparent power taken by each current circuit of a meter connected through a current

transformer shall not exceed the value shown in Table 2, at a current value that equals the

rated secondary current of the corresponding transformer, at reference temperature and

reference frequency of the meter.
Table 2 – Power consumption in current circuits
Class of meter
Meters
0,5 S 1 S 1
Single-phase and polyphase direct connected meter – – 4,0 VA
Single-phase and polyphase transformer operated meters 1,0 VA
...

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