IEC 62054-11:2004

IEC 62054-11 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering (a.c.) – Tariff and load control –
Part 11: Particular requirements for electronic ripple control receivers

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IEC 62054-11 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering (a.c.) – Tariff and load control –

Part 11: Particular requirements for electronic ripple control receivers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 91.140.50 ISBN 978-2-8322-3767-0

IEC 62054-11 ®
Edition 1.1 2016-11
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Electricity metering (a.c.) – Tariff and load control –
Part 11: Particular requirements for electronic ripple control receivers

– 2 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
INTRODUCTION TO AMENDMENT 1 . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Standard electrical values . 8
5 Mechanical requirements and tests . 8
5.1 Operation status indicator . 8
6 Climatic conditions, requirements and tests . 8
7 Electrical requirements and tests . 8
7.1 Supply voltage . 8
7.2 Heating . 9
7.3 Insulation . 9
7.4 Output elements . 9
7.5 Functional requirements and tests – Control performance . 9
7.6 Electromagnetic compatibility (EMC) . 11
7.7 Radio interference suppression . 17
8 Test conditions and type test . 17
Annex A (normative) Harmonic levels for testing ripple control receivers . 18
Annex B (normative) Selection of frequency for tests with harmonics . 19
Annex C (normative) Combination of parameters for operation and non-operation tests . 20
Annex D (informative) Acceptance tests . 21
Annex E (informative) Code terms . 22
Annex F (informative) Example of a test configuration for operation and non-operation
tests and for measurement of disturbance-limit curves . 23
Annex G (informative) Values of the influence quantities for the different tests . 24

Figure B.1 – Examples for selection of the frequency H . 19
c
Figure B.2 – Frequency deviations for measurement of the disturbance-limit curves . 19
Figure F.1 − Test configuration . 23

Table A.1 − Recommended values for 50 Hz networks . 18
Table C.1 − Combination of parameters . 20

 IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––
ELECTRICITY METERING (AC) –
TARIFF AND LOAD CONTROL –
Part 11: Particular requirements for electronic ripple
control receivers
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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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
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6) All users should ensure that they have the latest edition of this publication.
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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.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 62054-11 edition 1.1 contains the first edition (2004-05) [documents 13/1306/FDIS and
13/1315/RVD] and its amendment 1 (2016-11) [documents 13/1697/FDIS and 13/1711/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text. A
separate Final version with all changes accepted is available in this publication.

– 4 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
International Standard IEC 62054-11 has been prepared by IEC technical committee 13:
Equipment for electrical energy measurement and load control. This standard, in conjunction
with IEC 62052-21, cancels and replaces IEC 61037:1990, Electricity metering – Tariff and
load control – Particular requirements for electronic ripple control receivers.
This standard is to be used in conjunction with IEC 62052-21 and the relevant parts of the
IEC 62059 series.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of the base publication and its amendment 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.
A bilingual version of this publication may be issued at a later date.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 2 years from the date of publication.
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.
 IEC 2016
INTRODUCTION
This standard distinguishes between protective class I and protective class II equipment
The test levels are regarded as minimum values to guarantee the proper functioning of the
equipment under normal working conditions. For special applications, other test levels might
be necessary and should be agreed on between the user and the manufacturer.
Ripple control receivers are components of a system of remote control permitting the
simultaneous operation of a large number of receivers from a central point. The signal
generally used for this purpose is an audio-frequency voltage superimposed on the mains
frequency and coded in the form of pulses, which can provide a multiplicity of control
functions. Other types of signals, such as frequency modulation, deformation of the mains
frequency, etc. may also be used. These signals are propagated through the electricity supply
network, from the injection point to the receiver sites.
Some characteristics of such systems, for example, the value of the frequency or the method
of coding, are not standardized here.
To facilitate the application of this standard the following principles should be applied.
1) The requirements of this standard are not limiting. If it is absolutely unavoidable, a user
can add additional technical requirements in his specification.
The technical requirements and tests relate to the general functioning of the receiver. The
method of operation of the functional elements is not specified. These requirements and
tests may, however, be the subject of additional technical agreements.
2) Ripple control systems are auxiliary equipment for network operation. Their design is
determined by the network characteristics and other factors. At the present time rapid
development of power electronic equipment is leading to a parallel increase in the amount
of harmonic distortion in the supply voltage. The harmonic levels indicated in this standard
take account of this development. They are not to be considered as values that could be
regarded as permissible on the network but as recommended values for designing and
testing receivers. These recommended levels could be adapted to particular
characteristics of networks under consideration.
Receivers designed for use with transmitters already in operation and having a control
frequency equal, or very close, to a harmonic, need not conform to the whole of the
requirements of this standard.
For information, the relevant parts of IEC 62052, IEC 62054 and IEC 62059 are listed below.
IEC 62052-21:2004, Electricity metering equipment (AC) – General requirements, tests and
test conditions – Part 21: Tariff and load control equipment (Replaces the general
requirements of IEC 61037 and IEC 61038.)
Amendment 1 (2016)
IEC 62052-31:2015, Electricity metering equipment (AC) – General requirements, tests and
test conditions – Part 31: Product safety requirements and tests
IEC 62054-11, Electricity metering – Tariff and load control – Part 11: Particular requirements
for electronic ripple control receivers (Replaces the particular requirements of IEC 61037.)
IEC 62054-21, Electricity metering – Tariff and load control – Part 21: Particular requirements
for time switches (Replaces the particular requirements of IEC 61038.)
IEC 62059-11, Electricity metering equipment – Dependability – Part 11: General concepts

– 6 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
IEC 62059-21, Electricity metering equipment – Dependability – Part 21: Collection of meter
dependability data from the field
IEC 62059-41, Electricity metering equipment – Dependability – Part 41: Reliability prediction

INTRODUCTION TO AMENDMENT 1
The purpose of this amendment is to identify and remove all safety related requirements and
tests of IEC 62054-11:2004 that are replaced and extended by the complete set of
requirements and tests in IEC 62052-31:2015.

———————
To be published.
 IEC 2016
ELECTRICITY METERING (AC) –
TARIFF AND LOAD CONTROL –
Part 11: Particular requirements for electronic ripple
control receivers
1 Scope
This part of IEC 62054 specifies particular requirements for the type test of newly
manufactured indoor electronic ripple control receivers for the reception and interpretation of
pulses of a single audio frequency superimposed on the voltage of the electricity distribution
network and for the execution of the corresponding switching operations. In this system the
mains frequency is generally used to synchronize the transmitter and receivers. Neither the
control frequency nor the encoding are standardized in this standard.
This standard gives no requirements for constructional details internal to the receiver.
In the case where ripple control functionality is integrated in multifunction electricity metering
equipment, the relevant parts of this standard apply.
This standard does not cover the acceptance tests and the conformity tests. Nevertheless, an
example of what could be an acceptance test is given in Annex D.
The dependability aspect is covered by the documents of the IEC 62059 series.
The safety aspect is covered by IEC 62052-31:2015.
When using this standard in conjunction with IEC 62052-21, the requirements of this standard
take precedence over those of IEC 62052-21 with regard to any item already covered in it.
2 Normative references
The following referenced documents are indispensable for the application 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 62052-21:2004, Electricity metering equipment (AC) – General requirements, tests and
test conditions – Part 21: Tariff and load control equipment
Amendment 1 (2016)
IEC 62052-31:2015, Electricity metering equipment (AC) – General requirements, tests and
test conditions – Part 31: Product safety requirements and tests
3 Terms and definitions
For the purposes of this document, the definitions of IEC 62052-21 apply.
———————
To be published
– 8 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
4 Standard electrical values
The values given in IEC 62052-21 apply.
5 Mechanical requirements and tests
The requirements and tests specified in IEC 62052-21 and the following apply.
5.1 Operation status indicator
The receiver shall have an operation status indicator to indicate the quiescent state, the
message reception or the command execution.
6 Climatic conditions, requirements and tests
The conditions, requirements and tests specified in IEC 62052-21 apply.
7 Electrical requirements and tests
The requirements and tests specified in IEC 62052-21 and the following apply.
7.1 Supply voltage
7.1.1 Supply voltage range
The values specified in IEC 62052-21 apply.
7.1.2 Supply frequency range
IEC 62052-21 applies.
7.1.3 Power consumption
IEC 62052-21 applies.
7.1.4 Voltage dips and short interruptions
See 7.6.8.
7.1.5 Long interruptions of supply voltage
7.1.5.1 Requirements
If the position of the output elements is controlled only by the information received from the
decoding element – the ripple control messages – the output elements shall not change their
position at an interruption of the supply voltage, the length of which is to be agreed on
between user and supplier, or shall take up the pre-determined position within 5 s after the
restoration of the nominal supply voltage.
If the position of the output elements is also affected by the timers of the ripple control
receiver, then the output elements shall take up their position according to the timer
programme.
 IEC 2016
7.1.5.2 Test of effect of a long interruption of the supply voltage
The test consists of verifying that, after interrupting the supply voltage for an agreed length of
time and when the supply is restored to the receiver, the output elements retain or return to
the position that they had before the interruption or that they take up the predetermined
position agreed between the user and the supplier.
This test shall be carried out for all possible positions of the output switches.
The restoration of voltage shall be made with switching devices free from bounce.
7.1.6 Operation reserve
7.1.6.1 Requirements
If the ripple control receiver is equipped with a back-up power supply, IEC 62052-21 applies.
7.1.6.2 Tests
The test consists of verifying that, after interrupting the supply for a time period of 36 h, the
internal timers of the ripple control receiver maintain their value and when the supply is
restored to the receiver, the output elements take up the position according to the timer
programme.
7.1.7 Life of back-up power supply
If the ripple control receiver is equipped with a back-up power supply, IEC 62052-21 applies.
7.1.8 Back up power supply replacement
If the ripple control receiver is equipped with a back-up power supply, IEC 62052-21 applies.
7.2 Heating
IEC 62052-21 applies.
7.3 Insulation
IEC 62052-21 applies.
7.4 Output elements
IEC 62052-21 applies.
7.5 Functional requirements and tests – Control performance
7.5.1 General test conditions
Place the ripple control receiver under test in its normal operating position and, if necessary,
in a climatic chamber and supply it from an apparatus free of short interruptions and voltage
dips. Unless otherwise indicated, the reference conditions shown in Annex B of IEC 62052-21
shall be maintained.
The sources providing the neighbouring harmonics shall conform to the requirements of
7.6.12.2.1.
– 10 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
7.5.2 Operate voltage
7.5.2.1 Requirements
The operate voltage shall be agreed upon case by case taking into account the characteristics
of the ripple control system, the supply network, the manufacturing tolerances and the
variations of the influence quantities:
– supply voltage;
– supply frequency;
– temperature;
– harmonics/interharmonics;
– control frequency.
7.5.2.2 Test of operation
The correct operation of the receiver shall be tested successively for all the combinations of
parameters, which are shown in Table C.1 in accordance with the requirements of 7.6.11, the
control frequency varying within limits agreed between the user and the supplier.
For all these combinations, the receiver tested shall operate faultlessly and carry out the
commands corresponding to messages transmitted according to their codes, both at the
operate voltage U and at the maximum control voltage U .
max
f
NOTE It is assumed that if the ripple control receiver passes the test both at U and U , it will work correctly
f max
between these limits.
7.5.3 Non-operate voltage
7.5.3.1 Requirements
The non-operate voltage shall be agreed upon case by case taking into account the
characteristics of the ripple control system, the supply network, the manufacturing tolerances
and the variations of the influence quantities:
– supply voltage;
– supply frequency;
– temperature;
– harmonics/interharmonics;
– control frequency.
7.5.3.2 Test of non-operation
For this test, apply all the combinations of parameters given in Annex C in accordance with
the requirements of 7.6.11, the control frequency varying within the limits agreed between the
user and the supplier.
For all these combinations, the receiver tested shall not switch in response to a correctly
coded message at the non-operate voltage U .
nf
7.5.4 Maximum control voltage
For control frequencies below 250 Hz, the maximum voltage shall be at least 8 times and, for
frequencies above 750 Hz, at least 15 times greater than the operate voltage. For
intermediate frequencies, a linear interpolation shall be made according to the following
formula:
 IEC 2016
 ( f − 250) × 7 
s
U = U 8 + 
max f
 
 
where f is expressed in hertz.
s
7.5.5 Tolerance on the message
7.5.5.1 Requirements
The receiver shall operate correctly up to the specific timing tolerance limits of the code. The
tolerances and the test shall be agreed between the user and the supplier.
7.5.5.2 Test
This test shall be adapted and agreed between the user and the supplier.
7.6 Electromagnetic compatibility (EMC)
The requirements and values defined in IEC 62052-21 and the following apply.
7.6.1 Immunity to electromagnetic disturbances
IEC 62052-21 applies.
7.6.2 General test conditions
IEC 62052-21 applies.
7.6.3 Test of immunity to electrostatic discharges
In addition to IEC 62052-21, the following applies.
The application of the electrostatic discharge shall not affect the receiver:
– in a quiescent state, the receiver shall not start;
– during a transmission cycle, the output elements shall operate correctly, according to the
commands of the message.
7.6.4 Test of immunity to electromagnetic r.f. fields
In addition to IEC 62052-21, the following applies.
• Field strength of the unmodulated signal: 10 V/m: the application of the electromagnetic
r.f. fields shall not affect the receiver
– in a quiescent state, the receiver shall not start and the timers must not be disturbed;
– during a transmission cycle, the output elements shall operate correctly according to
the commands of the message, and the internal timers, if any.
• Field strength of the unmodulated signal: 30 V/m: during the test, a temporary degradation
or loss of function or performance is acceptable.
If the r.f. field is applied while the receiver is in a quiescent state, it shall be verified that the
receiver does not start as an effect of the r.f. field. For this purpose, 3 s after removing the r.f.
field, a message is transmitted with operate voltage U . The output elements shall operate
f
correctly according to the commands of the message.

– 12 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
If the r.f. field is applied during a transmission cycle, it is accepted that no operation is carried
out.
The application of the r.f. field shall not affect the internal timers. It shall be verified that, after
the test, the operations carried out on the basis of such internal timers are correctly executed.
7.6.5 Fast transient burst test
In addition to IEC 62052-21, the following applies.
The receiver shall be tested in a quiescent state and during transmission cycles, each time for
1 min and each time for both positive and negative polarities.
If the bursts are applied while the receiver is in a quiescent state, it shall be verified that the
receiver does not start as an effect of the bursts. For this purpose, 3 s after the bursts have
been applied a message is transmitted with operate voltage U . The output elements shall
f
operate correctly according to the commands of the message.
If the bursts are applied in such a way that bursts occur during a transmission cycle, it shall
be verified that bursts did not impede the operation capability of the receiver. For this
purpose, the receiver is started by a message with the operate voltage U . It shall be verified
f
that, despite the application of the bursts, no wrong operation occurs. In cases where the
disturbance coincides with the start bit or an information pulse related to this command, or is
adjacent to it, it is accepted that no operation is carried out. In all other cases, the command
must be carried out.
However, in non-operation or even with some kinds of codes, a malfunction may be accepted
if the transient coincides with a pulse position or is adjacent to it.
The application of the bursts shall not affect the internal timers. It shall be verified that after
the test, operations carried out based on such internal timers are correctly executed.
7.6.6 Test of immunity to conducted disturbances, induced by r.f. fields
In addition to IEC 62052-21, the following applies.
The receiver shall be tested in a quiescent state and during transmission cycles.
If the conducted r.f. disturbances are applied while the receiver is in a quiescent state, it shall
be verified that the receiver does not start as an effect of the conducted r.f. disturbances. For
this purpose, 3 s after removing the conducted r.f. disturbances, a message is transmitted
with operate voltage U. The output elements shall operate correctly according to the
f
commands of the message.
If the conducted r.f. disturbances are applied during a transmission cycle, it shall be verified
that the conducted r.f. disturbances did not impede the operation capability of the receiver.
For this purpose, the receiver is started by a message with the operate voltage U . It shall be
f
verified that, despite the application of the conducted r.f. disturbances, no wrong operation
occurs.
The application of the conducted r.f. disturbances shall not affect the internal timers. It shall
be verified that operations carried out on the basis of such internal timers are correctly
executed.
 IEC 2016
7.6.7 Surge immunity test
In addition to IEC 62052-21, the following applies.
The receiver shall be tested in a quiescent state and during transmission cycles, each time for
both positive and negative polarities.
If the surges are applied while the receiver is in a quiescent state, it shall be verified that the
receiver does not start as an effect of the surges. For this purpose, 3 s after the surges have
been applied a message is transmitted with operate voltage U . The output elements shall
f
operate correctly according to the commands of the message.
If the surges are applied in such a way that surges occur during a transmission cycle, it shall
be verified that the surges did not impede the operation capability of the receiver. For this
purpose, the receiver is started by a message with the operate voltage U . It shall be verified
f
that, despite the application of the surges, no wrong operation occurs. In cases where the
disturbance coincides with the start bit or an information pulse related to this command, or is
adjacent to it, it is accepted that no operation is carried out. In all other cases, the command
must be carried out.
However, in non-operation or even with some kinds of codes, a malfunction may be accepted
if the transient coincides with a pulse position or is adjacent to it.
The application of the surges shall not affect the internal timers. It shall be verified that after
the test, the operations carried out based on such internal timers are correctly executed.
7.6.8 Test of immunity to voltage dips and short interruptions
7.6.8.1 Requirements
When the receiver is in quiescent state, voltage dips or short interruptions lower than 500 ms
shall not affect, or initiate the starting of the receiver. For short interruptions longer than
500 ms, the receiver and its internal timers may stop and are re-initialized.
When the receiver is receiving a transmission cycle, voltage dips or short interruptions lower
than 500 ms must not impede the operation capability of the receiver. For short interruptions
longer than 500 ms, it is accepted that the receiver and its timers stop and are re-initialized.
If the receiver is equipped with a back-up power supply, voltage dips and short interruptions
shall not affect the timers.
7.6.8.2 Test of effect of short interruptions of supply and voltage dips in operation
The aim of the test is to check that the operation of the receiver is not unduly disturbed by a
voltage interruption of maximum 0,5 s ± 20 ms and that nothing other than the reset of the
receiver occurs when the voltage interruption is longer than 0,5 s. Two situations have to be
considered:
– the interruption takes place while the receiver is connected to the network in a quiescent
state;
– the interruption takes place during a transmission cycle.
a) The 0,5 s interruption takes place while the receiver is in a quiescent state. It shall be
verified that the receiver does not start as an effect of the voltage interruption and that
internal timers are not affected. For this purpose, 3 s after the voltage interruption, a
message is transmitted with the operate voltage U . The output elements should operate
f
correctly according to the commands of the message.

– 14 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
b) The 0,5 s interruption takes place during a transmission cycle. It shall be verified that the
interruption does not impede the operation capability of the receiver. For this purpose, the
receiver is started by a message with the operate voltage U , the other influence quantities
f
having their reference values. At a certain point of the cycle, the supply voltage is
interrupted for 0,5 s, whereby this point can be placed at different positions in subsequent
cycles (for instance, at the position of the start pulse, of an information pulse or of a pulse
interval). The message is to be composed in such a manner that a command to change
the state of the output element(s) is placed after the interruption.
It shall be verified that no wrong operation occurs. In the case where the disturbance
coincides with the start bit or an information pulse related to this command, or is adjacent
to it, it is accepted that no operation is carried out. In all other cases, the command must
be carried out.
7.6.9 Test of immunity to d.c. magnetic fields
In addition to IEC 62052-21, the following applies.
During the test, the receiver must retain its operational capacities (test of operation with U ,
f
test of non-operation with U , the control voltage being correctly coded, the other influence
nf
quantities having reference values as given in Annex B of IEC 62052-21).
7.6.10 Test of immunity to a.c. magnetic fields
In addition to IEC 62052-21, the following applies.
During the test, the receiver must retain its operational capacities (test of operation with U ,
f
test of non-operation with U , the control voltage being correctly coded, the other influence
nf
quantities having reference values as given in Annex B of IEC 62052-21).
7.6.11 Test of influence of harmonics
The receivers shall be designed in such a way that their operation is not disturbed by the
presence of voltage harmonics on the distribution network. The levels of harmonics, which
shall not disturb the function of the receivers, are shown in Table A.1.
In the case of receivers intended for use on existing ripple control installations having control
frequencies very close to a harmonic, the harmonics to be considered and their levels are to
be the subject of agreement between the user and the supplier.
The receivers shall not be disturbed in their operation when a correctly coded operate control
voltage is applied and shall not be disturbed with regard to their non-operation when a
correctly coded non-operate control voltage is applied over the temperature range specified in
Clause 6, over the supply voltage range specified in 7.1.1 and when they are subjected to the
following harmonics.
of the network voltage immediately below the control frequency,
a) Singly, the harmonic H
a
having the amplitude indicated in Table C.1 (or being the subject of agreement).
b) Singly, the harmonic H of the network voltage immediately above the control frequency,
b
having the amplitude indicated in Annex C (or being the subject of agreement).
c) Singly, the harmonic H of the network voltage immediately below H or immediately
c a
above H with the amplitude shown in Annex A. The choice of this harmonic and, where
b
appropriate its amplitude, shall be the subject of agreement between the user and the
supplier (see Figure B.1).
d) The combination of the harmonics H , H , H . Their amplitudes, whether taken from
a b c
Annex F or obtained by agreement between the user and the supplier, shall be multiplied
by a factor k = 0,6.
 IEC 2016
7.6.12 Test of immunity to interharmonics (quasi-steady voltages of non harmonic
frequencies)
7.6.12.1 Requirements
These voltages are produced by certain high-power industrial equipment (for example, cyclo-
converters or induction furnaces) or by overspill from neighbouring transmitters.
The ability of the receiver to resist these voltages is represented by a curve called the
"disturbance-limit curve". It represents the maximum value of these voltages as a function of
frequency which the receiver can withstand in the presence of the combination of
neighbouring harmonics given in 7.6.11d) and
– still function correctly under a coded control voltage equal to αU (α = parameter >1)
f
(disturbance-limit curve relative to operation);
– certainly not operate under a coded control voltage equal to βU (β = parameter <1)
nf
(disturbance-limit curve relative to non-operation);
where U and U are coded according to the message of the command to which the receiver
f nf
is set. The behaviour of the receiver at the frequencies f = f ± n f where n = 1 and 2 shall
s n
also be verified.
The limit values of the disturbance voltage limit curves shall be agreed between the user and
the supplier.
7.6.12.2 Test of influence of interharmonics (quasi-steady disturbing voltages of non
harmonic frequencies)
7.6.12.2.1 Disturbance-limit curve relative to operation
In order to determine the limits of disturbing voltages which still allow the receiver to operate
faultlessly, the disturbance-limit curve shall be plotted under the following conditions (see
Annex F for an example of test configuration).
a) Submit the receiver under test to a control voltage U = α U , α being equal to 1,5. The
s f
control voltage shall be coded according to the message for which the receiver is set.
b) Apply simultaneously three harmonics near to the control frequency as indicated in 7.6.11
d). One of these harmonics may be suppressed if the effect on the test results of its
removal is negligible due to its distance from the control frequency.
The phases of these harmonics in the supply system are normally not fixed. This effect
may be reproduced by taking harmonic frequencies slightly different from their exact
values without, however, the difference not exceeding ± 0,2 %. The phases of the
harmonics are also not fixed between themselves, and, to simulate this effect, the
frequency differences are adjusted in relation to each other by a displacement of
approximately ±0,1 % to ±0,3 % (see Annex B).
c) The other quantities shall have their reference values (see Annex B of IEC 62052-21).
d) In the range of frequencies between the harmonics, apply a voltage U of variable
v
frequency and amplitude. For each frequency, the limit of U for which the receiver
v
functions correctly shall be determined. U shall not exceed U .
v max
e) The performance of the receiver shall also be tested at the frequencies f = f ± n f where
s n
n = 1 and 2. In this case also U will be limited to U .
v max
NOTE 1 Beating, which is not synchronous with the code, occurs between the control voltage, the harmonic
voltages and the variable non-harmonic voltage U . The limit is the value of U for which no more than one mal-
v v
operation occurs during 10 messages.
NOTE 2 Among a number of receivers the threshold of operation varies over a certain range as a result of
manufacturing tolerances. It follows that the disturbance limit curves of a group of receivers will vary over a certain
band even with homogeneous manufacture.

– 16 – IEC 62054-11:2004+AMD1:2016 CSV
 IEC 2016
The supplier should provide an envelope curve that takes account of manufacturing tolerances.
7.6.12.2.2 Disturbance-limit curve relative to non-operation
The limit of disturbance voltages, which affect the non-operation of the receiver is determined
by the same method of measurement and under the same conditions as in 7.6.12.2.1, taking
account of the following differences.
a) The receiver under test is submitted to a control voltage β.U , β being equal to 0,67. The
nf
control voltage shall be coded according to the message for which the receiver is set.
b) As in 7.6.12.2.1b).
c) As in 7.6.12.2.1c).
d) In the range of frequencies between harmonics apply a voltage U of variable frequency
v
and amplitude. For each frequency, the limit of U for which the receiver just does not
v
carry out the operation is determined. U shall not exceed U .
v max
e) As in 7.6.12.2.1e).
NOTE The same remarks as in 7.6.12.2.1 apply.
7.6.13 Test of immunity to disturbing pulses
7.6.13.1 Requirements
The operation of the receivers in the presence of such pulses shall be represented by
two curves called "sensitivity curves". One relates to the starting of a receiver and the other to
the behaviour of a receiver that has started. These curves represent the maximum amplitude
(as a function of the duration) of a pulse at the rated control frequency, which causes the
same operation as a normal starting pulse or control pulse.
NOTE These curves are determined by the characteristics of the input element and the decoding element. In
considering the overall sensitivity of the receivers to disturbing pulses, it should be noted that additional protection
may be given by the particular properties of the code and that non-execution of an order is considered less
important than a mal-operation.
7.6.13.2 Test of effect of disturbing pulses on operation
a) Plotting of the sensitivity curve relative to the starting of the receiver
Submit the receivers under test, being in a quiescent state, to a pulse at the rated control
frequency of which the amplitude and length are variable. This pulse is followed after a
time approximately equal to half a cycle by a message comprising only the number of
pulses of level U necessary to carry out the command for which the receiver is adjusted.
f
The other influencing quantities shall have their reference values (see Annex B of
IEC 62052-21).
For each chosen length of the disturbing pulse, the amplitude shall be found for which the
command is just not carried out. This limiting amplitude shall be shown on a diagram as a
function of the length of the pulse.
b)
...