EN 60383-1:1996

SLOVENSKI STANDARD
01-november-1997
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Insulators for overhead lines with a nominal voltage above 1 kV -- Part 1: Ceramic or
glass insulator units for a.c. systems - Definitions, test methods and acceptance criteria
Isolatoren für Freileitungen mit einer Nennspannung über 1 kV -- Teil 1: Keramik- oder
Glas-Isolatoren für Wechselstromsysteme - Begriffe, Prüfverfahren und
Annahmekriterien
Isolateurs pour lignes aériennes de tension nominale supérieure à 1 kV -- Partie 1:
Eléments d'isolateurs en matière céramique ou en verre pour systèmes à courant
alternatif - Définitions, méthodes d'essai et critères d'acceptation
Ta slovenski standard je istoveten z: EN 60383-1:1996
ICS:
01.040.29 Elektrotehnika (Slovarji) Electrical engineering
(Vocabularies)
29.080.10 Izolatorji Insulators
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE IEC
383-1
INTERNATIONAL
Quatrième édition
STANDARD
Fourth edition
1993-04
Isolateurs pour lignes aériennes
de tension nominale supérieure à 1 000 V
Partie 1:
Eléments d'isolateurs en matière céramique
ou en verre pour systèmes à courant alternatif -
Définitions, méthodes d'essai et
critères d'acceptation
Insulators for overhead lines
with a nominal voltage above 1 000 V
Part 1:
Ceramic or glass insulator units for a.c. systems -
Definitions, test methods
and acceptance criteria
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383-1 ©IEC: 1993 - 3 -
CONTENTS
Page
FOREWORD 11
INTRODUCTION 13
Clause
Section 1: General
1 Scope and object 15
2 Normative references 17
3 Definitions 19
3.1 Insulator string 19
3.2 Pin insulator 19
3.3 Line post insulator 21
3.4 Traction insulator 21
3.5 Lot 21
3.6 Flashover 21
3.7 Dry lightning impulse withstand voltage 21
3.8 50 % dry lightning impulse flashover voltage 21
3.9 Wet power-frequency withstand voltage 21
3.10 Electromechanical failing load 21
3.11 Mechanical failing load 21
3.12 Puncture voltage 23
3.13 Creepage distance 23
3.14 Displacements 23
3.15 Sho rt standard string 23
3.16 Specified characteristics 23
Section 2: Insulators
4 Classification, types of insulators and insulating materials 25
4.1 Insulator classes 25
4.2 Insulator types 25
4.3 Insulating materials 25
5 Identification of insulators 27
Section 3 - Classification of tests,
sampling rules and procedures
6 Classification of tests 27
6.1 Type tests 27
6.2 Sample tests 29
6.3 Routine tests 29
7 Quality assurance 29
383-1 ©IEC: 1993 – 5 –
Clause Page
8 Procedures for type and sample tests 31
8.1 Insulator selection for type tests 31
8.2 Sampling rules and procedures for sample tests 31
8.3 Re-test procedure for sample tests 31
Section 4: Test procedures for electrical tests
9 General requirements for high voltage tests 33
10 Standard atmospheric conditions and correction factors
for electrical tests 35
10.1 Standard reference atmosphere 35
10.2 Correction factors for atmospheric conditions 35
11 Artificial rain parameters for wet tests 35
12 Mounting arrangements for electrical tests 35
13 Lightning impulse voltage tests (type test) 35
13.1 Test procedure 37
13.2 Acceptance criteria 37
14 Wet power-frequency voltage tests (type test) 37
14.1 Test procedure 37
14.2 Acceptance criteria 39
15 Puncture withstand test (sample test, for class B insulators only) 39
15.1 Power-frequency puncture withstand test 39
15.2 Impulse overvoltage puncture withstand test 41
16 Routine electrical test (only on class B insulators of ceramic material
or annealed glass)
Section 5: Test procedures for
mechanical and other tests
17 Verification of the dimensions (type and sample test) 43
18 Electromechanical failing load test (type and sample test) 43
18.1 Test procedure 43
18.2 Acceptance criteria 45
19 Mechanical failing load test (type and sample test) 45
19.1 Test procedure for pin and line post insulators 45
19.2 Test procedure for string insulator units 45
19.3 Acceptance criteria for pin insulators 45
19.4 Acceptance criteria for string insulator units and line post insulators 47

383-1 ©I EC: 1993 – 7 —
Clause Page
20 Thermal-mechanical performance test (type test) 49
20.1 Test procedure 49
20.2 Acceptance criteria 49
21 Verification of the axial, radial and angular displacements (sample test) 51
21.1 Test procedure 51
21.2 Acceptance criteria for cap and pin insulators 51
21.3 Acceptance criteria for long rod insulators 53
22 Verification of the locking system (sample test) 53
22.1 Conformity of the locking device 53
22.2 Verification of locking 53
22.3 Position of the locking device 55
22.4 Procedure for the operation test 55
22.5 Acceptance criteria for the operation test 55
23 Temperature cycle test (sample test)
23.1 Test procedure for string insulator units, pin insulators and
line post insulators composed of ceramic material 57
23.2 Test procedure for string insulator units, pin insulators and
line post insulators composed of annealed glass 57
23.3 Special test procedure for insulators with thick sections or very large
insulators 59
23.4 Complementary specifications 59
23.5 Acceptance criteria
24 Thermal shock test (sample test)
24.1 61
Test procedure
24.2 Acceptance criteria
25 Porosity test (sample test)
25.1 Test procedure
25.2 Acceptance criteria 61
26 Galvanizing test (sample test) 61
26.1 Test procedures 63
26.1.1 Appearance 63
26.1.2 Determination of the coating mass by the magnetic
test method
26.2 Acceptance criteria 63
26.2.1 Acceptance criteria for the appearance test 63
26.2.2 Acceptance criteria for the value of coating mass 65
27 Routine visual inspection 65
27.1 Insulators with ceramic insulating parts 65
27.2 67 Insulators with glass insulating parts
28 Routine mechanical test 67
28.1 Routine mechanical test on line post insulators 67
28.2 Routine mechanical test on string insulator units 69

383-1 ©
IEC: 1993 – 9 –
Clause Page
Section 6: Pin insulators
29 Mounting arrangements for tests on pin insulators 71
29.1 Standard mounting arrangement for electrical tests 71
29.2 Mounting arrangements for electrical tests reproducing
service conditions 73
29.3 Mounting arrangement for the mechanical failing load test 73
Section 7: Line post insulators
30 Coefficients for statistical analysis of the test results on
line post insulators 75
30.1 Coefficient for type tests 75
30.2 Coefficients for sample tests 75
31 Mounting arrangements for tests on line post insulators 77
31.1 Standard mounting arrangement for electrical tests 77
31.2 Mounting arrangements for electrical tests reproducing
service conditions 79
31.3 Mounting arrangement for the mechanical failing load test 79
Section 8: String insulator units
32 Prescriptions concerning type tests on string insulators 81
32.1 Electrical type tests on string insulators 81
32.2 Mechanical type tests 83
33 Coefficients for statistical analysis of the test results on string insulators 83
33.1 Coefficient for type tests 83
33.2 Coefficients for sample tests 83
34 Mounting arrangements for electrical tests on string insulator units 87
Section 9: Insulators for overhead electric traction lines
35 Mounting arrangements for electrical tests on insulators for
overhead electric traction lines 89
35.1 Standard mounting arrangement 89
35.2 Mounting arrangement representing service conditions 89
Figures 91
Annexes
A Method of comparison of the results of electromechanical or mechanical type
and sample tests 93
B Illustration of the mechanical and electromechanical test acceptance procedure
for string insulator units and line post insulators 97
C List of normative documents given for information 109

383-1 © IEC: 1993 -11 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INSULATORS FOR OVERHEAD LINES
WITH A NOMINAL VOLTAGE ABOVE 1 000 V
Part 1: Ceramic or glass insulator units
for a.c. systems -
Definitions, test methods and acceptance criteria
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 cooperation 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, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use 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.
International Standard IEC 383-1 has been prepared by sub-committee 36B: Insulators for
overhead lines, of IEC technical committee 36: Insulators.
Part 1, together with Part 2, replaces the third edition of IEC 393 (1983) and constitutes a
technical revision.
The text of this standard is based on the following documents:
Six Months' Rule Report on Voting Two Months' Procedure Repo rt on Voting
36B(CO)87-I and ll 36B(CO)91
36B(CO)95 36B(CO)97 and 97A
36B(CO)89 36B(CO)93
Full information on the voting for the approval of this standard can be found in the reports
on voting indicated in the above table.
IEC 383 consists of the following parts, under the general title: Insulators for overhead
lines with a nominal voltage above 1 000 V.
-
Part 1: Ceramic or glass insulator units for a.c. systems - Definitions, test methods
and acceptance criteria
- Part 2: Insulator strings and insulator sets for a.c. systems - Definitions, test
methods and acceptance criteria
Annexes A, B and C are for information only.

383-1 © IEC: 1993 –13 –
INTRODUCTION
This part of IEC 383 is divided into nine sections.
The first five sections cover general clauses, including general requirements and relevant
test procedures.
Sections six to nine deal with four different types of insulators:
Section 6: Pin insulators
Section 7: Line post insulators
Section 8: String insulator units
Section 9: Insulators for overhead electric traction lines.
Sections 6, 7 and 8 begin with a cross-reference table giving the tests applicable to the
insulators and the quantity of insulators to be tested.
Section 9, dealing with traction insulators, does not have a cross-reference table as
traction insulators can be referenced to one of the three other types of insulator dealt with
by this part of IEC 383.
The user of this part need only refer to the section dealing with the type of insulator to be
tested and to the general requirements and relevant test procedures contained in sections
one to five.
383-1 ©IEC: 1993 - 15 -
INSULATORS FOR OVERHEAD LINES
WITH A NOMINAL VOLTAGE ABOVE 1 000 V
Part 1: Ceramic or glass insulator units
for a.c. systems -
Definitions, test methods and acceptance criteria
Section 1: General
1 Scope and object
This pa rt of IEC 383 applies to insulators of ceramic material or glass for use on a.c.
overhead power lines and overhead traction lines with a nominal voltage greater than
1 000 V and a frequency not greater than 100 Hz.
It also applies to insulators for use on d.c. overhead electric traction lines.
This part applies to string insulator units, rigid overhead line insulators and to insulators o
...