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IEC 63075
Edition 1.0 2019-02
INTERNATIONAL
STANDARD
colour
inside
Superconducting ac power cables and their accessories for rated voltages
from 6 kV to 500 kV – Test methods and requirements
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IEC 63075
Edition 1.0 2019-02
INTERNATIONAL
STANDARD
colour
inside
Superconducting ac power cables and their accessories for rated voltages
from 6 kV to 500 kV – Test methods and requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20 ISBN 978-2-8322-6522-2
– 2 – IEC 63075:2019 IEC 2019
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.) . 10
3.2 Definitions concerning tests . 10
3.3 Other definitions (general design and cryogenic system) . 11
4 Voltage and current designations . 13
4.1 Rated voltages . 13
4.2 Rated operating current . 13
5 Cable materials . 14
5.1 Cable conductor materials . 14
5.2 Cable insulating materials (dielectric insulation) . 14
5.3 Cable screen materials . 14
5.4 Cable cryostat materials (thermal insulation) . 14
5.5 Cable oversheathing materials (outside cryostat) . 14
6 Cable characteristics . 14
7 Accessory characteristics . 15
8 Test conditions . 16
8.1 Ambient temperature. 16
8.2 Frequency and waveform of power frequency test voltages . 16
8.3 Wave form of impulse test voltages . 16
8.3.1 Lightning impulse voltage . 16
8.3.2 Switching impulse voltage. 16
8.4 Relationship of test voltages to rated voltages . 16
8.5 Cryogen temperature and pressure . 17
9 Routine tests on cables and on prefabricated accessories . 17
9.1 General . 17
9.1.1 Tests on cable core samples . 17
9.1.2 Tests on cable cryostat . 17
9.1.3 Tests on prefabricated accessories . 17
9.2 AC voltage test for cable followed by partial discharge test . 18
9.2.1 General . 18
9.2.2 Procedure . 18
9.2.3 Requirement . 18
9.3 Critical current measurement . 18
9.3.1 General . 18
9.3.2 Procedure . 18
9.3.3 Requirement . 19
9.4 Pressure test . 19
9.4.1 General . 19
9.4.2 Procedure . 19
9.4.3 Requirement . 19
9.5 Vacuum leak test . 19
9.5.1 General . 19
9.5.2 Procedure . 19
9.5.3 Requirement . 19
9.6 Electrical test on oversheath of the cable . 19
9.7 Tests on prefabricated accessories . 19
9.7.1 Voltage test followed by partial discharge test . 19
9.7.2 Pressure test and vacuum leak test . 20
10 Sample tests on cables . 20
10.1 General . 20
10.2 Frequency of tests . 20
10.3 Repetition of tests . 20
10.4 Conductor examination . 20
10.5 Measurement of thickness of cable insulation . 21
10.5.1 General . 21
10.5.2 Procedure . 21
10.5.3 Requirement . 21
10.6 Measurement of thickness of oversheath . 21
10.6.1 General . 21
10.6.2 Requirement . 21
10.7 Measurement of diameters . 21
10.8 Measurement of capacitance . 21
10.9 Lightning impulse voltage test . 22
11 Sample tests on accessories . 22
11.1 Tests on components . 22
11.2 Tests on complete accessory . 22
12 Type tests on cable systems . 23
12.1 General . 23
12.2 Range of type approval . 23
12.3 Summary of type tests . 24
12.4 Electrical type tests on complete cable systems . 24
12.4.1 Test voltage values . 24
12.4.2 Tests and sequence of tests . 24
12.4.3 Bending test . 25
12.4.4 Critical current measurement . 25
12.4.5 Pressure test . 25
12.4.6 Thermal cycle test . 26
12.4.7 Partial discharge test . 26
12.4.8 Tan δ measurement . 26
12.4.9 Load cycle voltage test . 26
12.4.10 Impulse voltage tests . 26
12.4.11 Examination of cable and accessories . 27
12.5 Non-electrical type tests on cable components and on complete cable . 27
12.5.1 Overview on non-electrical type tests. 27
12.5.2 Check of cable construction . 28
12.5.3 Tests for determining the mechanical properties of oversheaths before
and after ageing . 28
12.5.4 Loss of mass test on PVC oversheaths of type ST . 28
12.5.5 Test on PVC oversheaths (ST and ST ) at low temperature . 28
1 2
12.5.6 Heat shock test for PVC oversheaths (ST and ST ) . 29
1 2
– 4 – IEC 63075:2019 IEC 2019
12.5.7 Measurement of carbon black content of black PE oversheaths (ST
and ST ) . 29
12.5.8 Test under fire condit
...