SIST EN 60137:2008

SLOVENSKI STANDARD
SIST EN 60137:2008
01-december-2008
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SIST EN 60137:2004
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Insulated bushings for alternating voltages above 1 000 V (IEC 60137:2008)
Isolierte Durchführungen für Wechselspannungen über 1 000 V (IEC 60137:2008)
Traversées isolées pour tensions alternatives supérieures à 1 000 V (CEI 60137:2008)
Ta slovenski standard je istoveten z: EN 60137:2008
ICS:
29.080.20 Skoznjiki Bushings
SIST EN 60137:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60137:2008

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SIST EN 60137:2008

EUROPEAN STANDARD
EN 60137

NORME EUROPÉENNE
October 2008
EUROPÄISCHE NORM

ICS 29.080.20 Supersedes EN 60137:2003


English version


Insulated bushings for alternating voltages above 1 000 V
(IEC 60137:2008)


Traversées isolées pour tensions Isolierte Durchführungen
alternatives supérieures à 1 000 V für Wechselspannungen über 1 000 V
(CEI 60137:2008) (IEC 60137:2008)




This European Standard was approved by CENELEC on 2008-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60137:2008 E

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SIST EN 60137:2008
EN 60137:2008 - 2 -
Foreword
The text of document 36A/134/FDIS, future edition 6 of IEC 60137, prepared by SC 36A, Insulated
bushings, of IEC TC 36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved
by CENELEC as EN 60137 on 2008-10-01.
This European Standard supersedes EN 60137:2003.
EN 60137:2008 includes the following significant technical changes with respect to EN 60137:2003:
– long duration power-frequency voltage for transformer bushings;
– special requirements for type and acceptance tests applicable to transformer and GIS bushings;
– specific insulation levels for bushings fitted to transformers and GIS;
– according to IEC Guide 111, clauses relating to safety and the environment have been added;
– the altitude correction procedure has been revised ( > 1 000 m).
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60137:2008 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 60076-1 NOTE  Harmonized as EN 60076-1:1997 (modified).
IEC 60076-2 NOTE  Harmonized as EN 60076-2:1997 (modified).
IEC 60076-3 NOTE  Harmonized as EN 60076-3:2001 (not modified).
IEC 60296 NOTE  Harmonized as EN 60296:2004 (not modified).
IEC 60507 NOTE  Harmonized as EN 60507:1993 (not modified).
IEC 60517 NOTE  Harmonized as EN 60517:1996 (not modified).
IEC 60694 NOTE  Harmonized as EN 60694:1996 (not modified).
IEC 60836 NOTE  Harmonized as EN 60836:2005 (not modified).
IEC 60867 NOTE  Harmonized as EN 60867:1994 (not modified).
IEC 62271-203 NOTE  Harmonized as EN 62271-203:2004 (not modified).
__________

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SIST EN 60137:2008
- 3 - EN 60137:2008
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

1)
IEC 60038 (mod) 1983 IEC standard voltages HD 472 S1 1989
- - + corr. February 2002
- - A1 1995
A1 1994
A2 1997


IEC 60050-212 1990 International Electrotechnical Vocabulary - -
(IEV) -
Chapter 212: Insulating solids, liquids and
gases


2) 3)
IEC 60059 - IEC standard current ratings EN 60059 1999


2) 3)
IEC 60060-1 - High-voltage test techniques - HD 588.1 S1 1991
Part 1: General definitions and test
requirements


3)
IEC 60068-2-17 1994 Environmental testing - EN 60068-2-17 1994
Part 2: Tests - Test Q: Sealing


2) 3)
IEC 60071-1 - Insulation co-ordination - EN 60071-1 2006
Part 1: Definitions, principles and rules


2) 3)
IEC 60076-5 - Power transformers - EN 60076-5 2006
Part 5: Ability to withstand short circuit


2)
IEC 60076-7 - Power transformers - - -
Part 7: Loading guide for oil-immersed power
transformers


2) 3)
IEC 60216-2 - Electrical insulating materials - Thermal EN 60216-2 2005
endurance properties -
Part 2: Determination of thermal endurance
properties of electrical insulating materials -
Choice of test criteria


2) 3)
IEC 60270 - High-voltage test techniques - Partial EN 60270 2001
discharge measurements


2) 3)
IEC 60376 - Specification of technical grade sulfur EN 60376 2005
hexafluoride (SF ) for use in electrical
6
equipment


2) 3)
IEC 60480 - Guidelines for the checking and treatment of EN 60480 2004
sulphur hexafluoride (SF ) taken from
6
electrical equipment and specification for its
re-use



1)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.
2)
Undated reference.
3)
Valid edition at date of issue.

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SIST EN 60137:2008
EN 60137:2008 - 4 -
Publication Year Title EN/HD Year

2) 3)
IEC 60505 - Evaluation and qualification of electrical EN 60505 2004
insulation systems


2)
IEC/TR 60815 - Guide for the selection of insulators in respect - -
of polluted conditions


2) 3)
IEC 61462 - Composite hollow insulators - EN 61462 2007
Pressurized and unpressurized insulators for
use in electrical equipment with rated voltage
greater than 1 000 V - Definitions, test
methods, acceptance criteria and design
recommendations


2)
IEC 61463 - Bushings - Seismic qualification - -


2) 3)
IEC 62155 (mod) - Hollow pressurized and unpressurized EN 62155 2003
ceramic and glass insulators for use in
electrical equipment with rated voltages
greater than 1 000 V


2) 3)
IEC 62217 - Polymeric insulators for indoor and outdoor EN 62217 2006
use with a nominal voltage > 1 000 V - + corr. December 2006
General definitions, test methods and
acceptance criteria


IEC 62271 Series High-voltage switchgear and controlgear EN 62271 Series


2) 4)
IEC 62271-1 - High-voltage switchgear and controlgear - EN 62271-1 200X
Part 1: Common specifications


2)
IEC Guide 109 - Environmental aspects - Inclusion in - -
electrotechnical product standards


2)
IEC Guide 111 - Electrical high-voltage equipment in high-- -
voltage substations - Common
recommendations for product standards


CISPR 16-1 Series Specification for radio disturbance and EN 55016-1 Series
immunity measuring apparatus and methods -
Part 1: Radio disturbance and immunity
measuring apparatus


2)
CISPR 18-2 - Radio interference characteristics of overhead - -
power lines and high-voltage equipment -
Part 2: Methods of measurement and
procedure for determining limits




4)
To be ratified.

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SIST EN 60137:2008
IEC 60137
Edition 6.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Insulated bushings for alternating voltages above 1 000 V

Traversées isolées pour tensions alternatives supérieures à 1 000 V

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XA
CODE PRIX
ICS 29.080.20 ISBN 2-8318-9916-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60137:2008
– 2 – 60137 © IEC:2008
CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope.9
2 Normative references .9
3 Terms and definitions .10
4 Ratings.16
4.1 Standard values of highest voltage for equipment (U ).16
m
4.2 Standard values of rated current (I ).16
r
4.3 Standard values of rated thermal short-time current (I ).16
th
4.4 Standard values of rated dynamic current (I ) .17
d
4.5 Minimum withstand values of cantilever load .17
4.6 Angle of mounting .18
4.7 Minimum nominal creepage distance .18
4.8 Temperature limits and temperature rise .18
4.9 Standard insulation levels .20
4.10 Test tap on transformer bushings .22
5 Operating conditions .22
5.1 Temporary overvoltages .22
5.2 Altitude.22
5.3 Temperature of ambient air and immersion media .23
5.4 Seismic conditions .24
6 Ordering information and markings .24
6.1 Enumeration of characteristics .24
6.1.1 Application .24
6.1.2 Classification of bushings .24
6.1.3 Ratings.24
6.1.4 Operating conditions.24
6.1.5 Design.25
6.2 Markings .26
7 Test requirements .27
7.1 General requirements.27
7.2 Test classification.27
7.2.1 Type tests .28
7.2.2 Routine tests .29
7.2.3 Special tests.29
7.3 Condition of bushings during dielectric and thermal tests .29
8 Type tests .31
8.1 Dry or wet power-frequency voltage withstand test .31
8.1.1 Applicability .31
8.1.2 Test method and requirements .31
8.1.3 Acceptance .31
8.2 Long duration power-frequency voltage withstand test (ACLD) .32
8.2.1 Applicability .32
8.2.2 Test method and requirements .32
8.2.3 Acceptance .32
8.3 Dry lightning impulse voltage withstand test (BIL).33

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SIST EN 60137:2008
60137 © IEC:2008 – 3 –
8.3.1 Applicability .33
8.3.2 Test method and requirements .33
8.3.3 Acceptance .33
8.4 Dry or wet switching impulse voltage withstand test (SIL).34
8.4.1 Applicability .34
8.4.2 Test method and requirements .34
8.4.3 Acceptance .34
8.5 Thermal stability test .35
8.5.1 Applicability .35
8.5.2 Test method and requirements .35
8.5.3 Acceptance .36
8.6 Electromagnetic compatibility tests (EMC).36
8.6.1 Emission test.36
8.6.2 Immunity test.37
8.7 Temperature rise test .37
8.7.1 Applicability .37
8.7.2 Test method and requirements .37
8.7.3 Acceptance .39
8.8 Verification of thermal short-time current withstand .39
8.8.1 Applicability .39
8.8.2 Verification method and requirements.39
8.8.3 Acceptance .40
8.9 Cantilever load withstand test.41
8.9.1 Applicability .41
8.9.2 Test method and requirements .41
8.9.3 Acceptance .41
8.10 Tightness test on liquid-filled, compound-filled and liquid-insulated bushings .41
8.10.1 Applicability .41
8.10.2 Test method and requirements .42
8.10.3 Acceptance .42
8.11 Internal pressure test on gas-filled, gas-insulated and gas-impregnated
bushings .42
8.11.1 Applicability .42
8.11.2 Test method and requirements .42
8.11.3 Acceptance .42
8.12 External pressure test on partly or completely gas-immersed bushings .42
8.12.1 Applicability .42
8.12.2 Test method and requirements .42
8.12.3 Acceptance .43
8.13 Verification of dimensions .43
8.13.1 Applicability .43
8.13.2 Acceptance .43
9 Routine tests .43
9.1 Measurement of dielectric dissipation factor (tan δ) and capacitance at
43
ambient temperature .
9.1.1 Applicability .43
9.1.2 Test method and requirements .43
9.1.3 Acceptance .43
9.2 Dry lightning impulse voltage withstand test (BIL).44

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SIST EN 60137:2008
– 4 – 60137 © IEC:2008
9.2.1 Applicability .44
9.2.2 Test method and requirements .44
9.2.3 Acceptance .44
9.3 Dry power-frequency voltage withstand test .44
9.3.1 Applicability .44
9.3.2 Test method and requirements .45
9.3.3 Acceptance .45
9.4 Measurement of partial discharge quantity .45
9.4.1 Applicability .45
9.4.2 Test method and requirements .45
9.4.3 Acceptance .45
9.5 Tests of tap insulation .46
9.5.1 Applicability and test requirements .46
9.5.2 Acceptance .46
9.6 Internal pressure test on gas-filled, gas-insulated and gas-impregnated
bushings .46
9.6.1 Applicability .46
9.6.2 Test method and requirements .47
9.6.3 Acceptance .47
9.7 Tightness test on liquid-filled, compound-filled and liquid-insulated bushings .47
9.7.1 Applicability .47
9.7.2 Test method and requirements .47
9.7.3 Acceptance .47
9.8 Tightness test on gas-filled, gas-insulated and gas-impregnated bushings .47
9.8.1 Applicability .47
9.8.2 Test method and requirements .47
9.8.3 Acceptance .48
9.9 Tightness test at the flange or other fixing device.48
9.9.1 Applicability .48
9.9.2 Test method and requirements .48
9.9.3 Acceptance .48
9.10 Visual inspection and dimensional check.49
9.10.1 Applicability .49
9.10.2 Acceptance .49
10 Requirements and tests for bushings of highest voltages for equipment equal to or
less than 52 kV made of ceramic, glass or inorganic materials, resin or combined
insulation.49
10.1 Temperature requirements .49
10.2 Level of immersion medium .49
10.3 Markings .49
10.4 Test requirements .50
10.4.1 Type tests .50
10.4.2 Routine tests .50
11 Recommendations for transport, storage, erection, operation and maintenance.51
11.1 Conditions during transport, storage and installation .51
11.2 Installation .51
11.3 Unpacking and lifting.51
11.4 Assembly .52
11.4.1 Mounting .52

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SIST EN 60137:2008
60137 © IEC:2008 – 5 –
11.4.2 Connections .52
11.4.3 Final installation inspection.52
11.5 Operation .53
11.6 Maintenance.53
11.6.1 General .53
11.6.2 Recommendation for the manufacturer .53
11.6.3 Recommendations for the user .53
11.6.4 Failure report.54
12 Safety.55
12.1 Electrical aspects .55
12.2 Mechanical aspects.55
12.3 Thermal aspects.55
13 Environmental aspects .55
Bibliography.57

Figure 1 – Altitude correction factor .23
Figure 2 – Marking plate for bushings for highest voltage for equipment greater than
100 kV (see 6.2) .26
Figure 3 – Marking plate for bushings for highest voltage for equipment equal to or
less than 100 kV, except for bushings for which Figure 2 is applicable (see 6.2).27
Figure 4 – Marking plate for bushings for highest voltage for equipment equal to or
less than 52 kV made of ceramic, glass or inorganic materials, resin or combined
insulation (see 10.3) .27
Figure 5 – Voltage profile for long duration test ACLD .32

Table 1 – Minimum values of cantilever withstand load (see 4.5 and 8.9).17
Table 2 – Maximum values of temperature and temperature rise above ambient air
(see 4.8) .19
Table 3 – Temperature of ambient air and immersion media (see 5.3) .20
Table 4 – Insulation levels for highest voltage for equipment (see 4.9, 8.1, 8.3, 8.4, 9.2
and 9.3) .21
Table 5 – Applicability of
...