EN 60437:1997

SLOVENSKI STANDARD
01-november-1998
Radio interference test on high-voltage insulators (IEC 60437:1997)
Radio interference test on high-voltage insulators
Funkstörprüfungen an Hochspannungsisolatoren
Essais de perturbation radioélectrique des isolateurs pour haute tension
Ta slovenski standard je istoveten z: EN 60437:1997
ICS:
29.080.10 Izolatorji Insulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1997-09
Essai de perturbations radioélectriques
des isolateurs pour haute tension
Radio interference test
on high-voltage insulators
 IEC 1997 Droits de reproduction réservés  Copyright - all rights reserved
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60437 © IEC:1997 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 7
Clause
1 Scope . 9
2 Normative references . 9
3 Definitions . 11
4 Measurement frequency . 11
5 Radio noise limits and test voltage. 11
6 Measuring instruments . 11
6.1 Standard CISPR measuring apparatus . 11
6.2 Other measuring apparatus . 11
7 Measuring circuit . 11
8 Requirements for the test voltage . 13
9 Atmospheric conditions . 13
10 Test area . 13
11 Arrangement of insulators for test . 13
11.1 Mounting of insulators . 13
11.2 Condition of insulators before test . 15
12 Insulators for type test . 15
12.1 Number of insulators . 15
12.2 String insulator units . 17
13 Procedure for type tests. 17
13.1 Checking and calibration of test circuit . 17
13.2 Voltage application and RI characteristics . 17
13.3 Acceptance criterion . 19
14 Procedure for sample tests . 19
14.1 Insulators subject to sample tests . 19
14.2 Number of samples . 19
14.3 Mounting arrangement . 19
14.4 Test procedure . 19
14.5 Acceptance criterion . 19
15 Test report. 19

60437 © IEC:1997 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
RADIO INTERFERENCE TEST
ON HIGH-VOLTAGE INSULATORS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60437 has been prepared by IEC technical committee 36:
Insulators.
This second edition cancels and replaces the first edition which was issued as a technical
report in 1973. It constitutes a technical revision and now has the status of International
Standard.
The text of this standard is based on the following documents:
FDIS Report on voting
36/150/FDIS 36/154/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.

60437 © IEC:1997 – 7 –
INTRODUCTION
The first issue of IEC 60437 presented the then available information on a radio interference
test on high-voltage insulators as a technical report. This allowed further experience in
conducting the test and the interpretation of results to be gained.
This second edition incorporates that experience. It presents, in the form of an International
Standard, the recommended procedures for a radio interference test on high-voltage insulators.

60437 © IEC:1997 – 9 –
RADIO INTERFERENCE TEST
ON HIGH-VOLTAGE INSULATORS
1 Scope
This International Standard specifies the procedure for a radio interference (RI) test carried out
in a laboratory on clean and dry insulators at a frequency of 0,5 MHz or 1 MHz or, alternatively,
at other frequencies between 0,5 MHz and 2 MHz.
In service the RI characteristics of an insulator may be modified by the ambient conditions,
particularly rainfall and other moisture, and by pollution. It is not considered feasible to specify
reproducible test conditions to simulate a range of ambient conditions. Hence only tests on
clean and dry insulators are specified in this standard.
NOTE – The effects of insulator surface conditions, including pollution, are presented in Amendment 1 of
CISPR 18-2.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent edition of the normative documents indicated below. Members of
IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(471):1984, International Electrotechnical Vocabulary (IEV) – Chapter 471: Insulators
IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test require-
ments
IEC 60137:1995, Insulated bushings for alternating voltages above 1 000 V
IEC 60168:1994,Tests on indoor and outdoor post insulators of ceramic material or glass for
systems with nominal voltages greater than 1 000 V
IEC 60383-1:1993, Insulators for overhead lines with a nominal voltage above 1 000 V – Part 1:
Glass or ceramic insulator units for a.c. systems – Definitions, test methods and acceptance
criteria
IEC 60383-2:1993, Insulators for overhead lines with a nominal voltage above 1 000 V – Part 2:
Insulator strings and insulator sets for a.c. systems – Definitions, test methods and acceptance
criteria
CISPR 16-1:1993, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 1: Radio disturbance and immunity measuring apparatus
CISPR 18-2:1986, Radio interference characteristics of overhead power lines and high-voltage
equipment – Part 2: Methods of measurement and procedure for determining limits
Amendment 1 (1993)
60437 © IEC:1997 – 11 –
3 Definitions
For the purpose of this International Standard, the definitions given in IEC 60050(471) and
IEC 60383-1 are applicable.
4 Measurement frequency
Measurements of RI characteristics shall be made at a frequency of (0,5 ± 0,05) MHz or
(1,0 ± 0,1) MHz or alternatively by agreement between purchaser and manufacturer at other
frequencies between 0,5 MHz and 2 MHz.
NOTE – Although CISPR 18-2 gives the reference measurement frequency for the measurement of RI
characteristics as 0,5 MHz, the existing standard practice in some countries is to use 1 MHz or 2 MHz when
measuring radio interference characteristics of insulators.
The frequencies of 0,5 MHz or alternatively 1 MHz are preferred because, usually, the level of
radio noise at this part of the spectrum is representative of the higher levels and also because
0,5 MHz lies between the low and medium frequency radio broadcast bands.
The RI characteristics of insulators do not normally affect television broadcasts.
5 Radio noise limits and test voltage
This standard does not specify a limiting value for the radio interference characteristic of
insulators or the test voltage. When RI tests are required, the relevant values, depending on
product or national regulations or specifications, shall be agreed between the purchaser and
manufacturer.
NOTE – Guidance for establishing limit values is given in CISPR 18-2, Amendment 1.
6 Measuring instruments
6.1 Standard CISPR measuring apparatus
Unless otherwise agreed, the standard CISPR measuring apparatus, as specified in CISPR 16-1,
shall be used for all measurements of RI characteristics of insulators.
6.2 Other measuring apparatus
By agreement between the purchaser and manufacturer measuring apparatus differing from the
CISPR standard measuring apparatus may be used provided that conversion of the
measurements to quasi peak values is possible.
7 Measuring circuit
Laboratory measurements of radio noise shall be made by measuring the conducted quantities,
either current or voltage.
The relevant measuring circuits are specified in CISPR 18-2.
The basic test circuit is shown in figure 4 of CISPR 18-2, and a practical form of standard test
circuit in figure 5. Depending on the distance between the measuring set and the test circuit,
the arrangements shown in figure 6 or figure 7 of CISPR 18-2 may be incorporated into the test
circuit of figure 5.
60437 © IEC:1997 – 13 –
8 Requirements for the test voltage
RI measurements shall be made with a power-frequency voltage applied to the test object. The
test voltage and its method of measurement shall comply with the requirements of
IEC 60060-1. The radio noise level produced by the connections between the transformer and
test insulator shall be insignificant compared with the levels to be measured from the test
object at the test voltage.
9 Atmospheric conditions
The standard reference atmospheric conditions in accordance with IEC 60060-1 are not
applicable to radio interference tests.
Tests made in accordan
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