IEC 61869-5:2011

IEC 61869-5 ®
Edition 1.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Instrument transformers –
Part 5: Additional requirements for capacitor voltage transformers

Transformateurs de mesure –
Partie 5: Exigences supplémentaires concernant les transformateurs
condensateurs de tension
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IEC 61869-5 ®
Edition 1.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Instrument transformers –
Part 5: Additional requirements for capacitor voltage transformers

Transformateurs de mesure –
Partie 5: Exigences supplémentaires concernant les transformateurs
condensateurs de tension
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 17.220.20 ISBN 978-2-88912-543-2

– 2 – 61869-5  IEC:2011
CONTENTS
FOREWORD . 5
1 Scope . 8
2 Normative references . 8
3 Terms and Definitions . 8
3.1 General definitions .9
3.2 Definitions related to dielectric ratings and voltages . 14
3.4 Definitions related to accuracy . 14
3.5 Definitions related to other ratings . 14
3.7 Index of abbreviations . 15
5 Ratings . 15
5.3 Rated insulation levels . 16
5.3.3 Other requirements for primary terminals insulation . 16
5.3.5 Insulation requirements for secondary terminals. 17
5.3.501 Electromagnetic unit insulation requirements . 17
5.4 Rated frequency . 17
5.5 Rated output . 17
5.5.501 Rated output values . 17
5.5.502 Rated thermal limiting output . 18
5.5.503 Rated output values for residual voltage windings . 18
5.5.504 Rated thermal limiting output for residual voltage windings . 18
5.6 Rated accuracy class . 18
5.6.501 Accuracy requirements for measuring capacitor voltage transformer . 18
5.6.502 Accuracy requirements for protective capacitor voltage transformers . 19
5.501 Standard values of rated voltages . 20
5.501.1 Rated primary voltages U . 20
Pr
5.501.2 Rated secondary voltages . 20
5.501.3 Rated voltages for secondary winding intended to produce a residual
voltage . 21
5.501.4 Standard values of rated voltage factor . 21
6 Design and construction . 22
6.1 Requirements for liquids used in equipment . 22
6.1.4 Liquid tightness . 22
6.7 Mechanical requirements . 22
6.8 Multiple chopped impulse on primary terminals . 22
6.9 Internal arc fault protection requirements . 22
6.13 Markings . 22
6.13.501 Terminal markings . 22
6.13.502 Rating plate markings . 23
6.501 Short circuit withstand capability . 27
6.502 Ferro-resonance. 27
6.502.1 General . 27
6.502.2 Transients of ferro-resonance oscillations . 27
6.503 Transient response . 28
6.503.1 General . 28
6.503.2 Requirements for transient response . 28
6.503.3 Standard transient response classes . 28

61869-5  IEC:2011 – 3 –
6.504 Requirements for carrier – frequency accessories . 29
6.504.1 General . 29
6.504.2 Drain coil . 29
6.504.3 Voltage limitation device . 29
7 Tests . 30
7.1 General . 30
7.1.2 List of tests. 30
7.1.3 Sequence of tests . 31
7.2 Type tests . 33
7.2.2 Temperature-rise test . 33
7.2.3 Impulse voltage withstand test on primary terminals. 34
7.2.4 Wet test for outdoor type transformers . 35
7.2.6 Test for accuracy . 35
7.2.8 Enclosure tightness test at ambient temperature . 37
7.2.501 Capacitance and tanδ measurement at power-frequency . 37
7.2.502 Short-circuit withstand capability test . 38
7.2.503 Ferro-resonance tests . 39
7.2.504 Transient response test . 39
7.2.505 Type test for carrier frequency accessories . 41
7.3 Routine tests . 42
7.3.1 Power-frequency voltage withstand tests on primary terminals . 42
7.3.2 Partial discharge measurement . 44
7.3.5 Test for accuracy . 44
7.3.7 Enclosure tightness test at ambient temperature . 46
7.3.8 Pressure test for the enclosure . 46
7.3.501 Ferro-resonance check . 46
7.3.502 Routine tests for carrier frequency accessories . 46
7.4 Special tests . 47
7.4.1 Chopped impulse voltage withstand test on primary terminals . 47
7.4.2 Multiple chopped impulse test on primary terminals . 47
7.4.3 Measurement of capacitance and dielectric diss
...