IEC 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

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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
– 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

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 .
...