IEC 63075:2019

Superconducting AC power cables and their accessories for rated voltages from 6 kV to 500 kV - Test methods and requirements

IEC 63075:2019 specifies test methods and requirements for high-temperature superconducting (HTS) AC power cable systems, cables and their accessories, for fixed installations, for rated voltages from 6 kV (Um = 7,2 kV) up to and including 500 kV (Um = 550 kV).
The requirements apply to single-core, three-core and three-phase concentric cables with cold dielectric and their accessories that are not intended for fault current limitation purposes.
This document does not cover special cables and their accessories, such as fault current limiting cables or submarine cables, for which modifications to the standard tests may be necessary or special test conditions may need to be devised.
This document does not cover test methods and requirements for the cooling system.

General Information

• Status: Published
• Publication Date: 04-Feb-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.060.20 - Cables
• Technical Committee: TC 20 - Electric cables
• Drafting Committee: PT 63075 - TC 20/PT 63075
• Current Stage: PPUB - Publication issued
• Start Date: 08-Mar-2019
• Completion Date: 05-Feb-2019

Standards Content (Sample)

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
...