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BS EN 63075:2019

BS EN 63075:2019

$198.66

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

Published By Publication Date Number of Pages
BSI 2019 52
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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 ( U m = 7,2 kV) up to and including 500 kV ( U m = 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.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
8 FOREWORD
10 INTRODUCTION
11 1 Scope
2 Normative references
12 3 Terms and definitions
3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.)
3.2 Definitions concerning tests
13 3.3 Other definitions (general design and cryogenic system)
15 4 Voltage and current designations
4.1 Rated voltages
4.2 Rated operating current
16 5 Cable materials
5.1 Cable conductor materials
5.2 Cable insulating materials (dielectric insulation)
5.3 Cable screen materials
5.4 Cable cryostat materials (thermal insulation)
5.5 Cable oversheathing materials (outside cryostat)
6 Cable characteristics
17 7 Accessory characteristics
18 8 Test conditions
8.1 Ambient temperature
8.2 Frequency and waveform of power frequency test voltages
8.3 Wave form of impulse test voltages
8.3.1 Lightning impulse voltage
8.3.2 Switching impulse voltage
8.4 Relationship of test voltages to rated voltages
19 8.5 Cryogen temperature and pressure
9 Routine tests on cables and on prefabricated accessories
9.1 General
9.1.1 Tests on cable core samples
9.1.2 Tests on cable cryostat
9.1.3 Tests on prefabricated accessories
20 9.2 AC voltage test for cable followed by partial discharge test
9.2.1 General
9.2.2 Procedure
9.2.3 Requirement
9.3 Critical current measurement
9.3.1 General
9.3.2 Procedure
21 9.3.3 Requirement
9.4 Pressure test
9.4.1 General
9.4.2 Procedure
9.4.3 Requirement
9.5 Vacuum leak test
9.5.1 General
9.5.2 Procedure
9.5.3 Requirement
9.6 Electrical test on oversheath of the cable
9.7 Tests on prefabricated accessories
9.7.1 Voltage test followed by partial discharge test
22 9.7.2 Pressure test and vacuum leak test
10 Sample tests on cables
10.1 General
10.2 Frequency of tests
10.3 Repetition of tests
10.4 Conductor examination
23 10.5 Measurement of thickness of cable insulation
10.5.1 General
10.5.2 Procedure
10.5.3 Requirement
10.6 Measurement of thickness of oversheath
10.6.1 General
10.6.2 Requirement
10.7 Measurement of diameters
10.8 Measurement of capacitance
24 10.9 Lightning impulse voltage test
11 Sample tests on accessories
11.1 Tests on components
11.2 Tests on complete accessory
25 12 Type tests on cable systems
12.1 General
12.2 Range of type approval
26 12.3 Summary of type tests
12.4 Electrical type tests on complete cable systems
12.4.1 Test voltage values
12.4.2 Tests and sequence of tests
27 12.4.3 Bending test
12.4.4 Critical current measurement
12.4.5 Pressure test
28 12.4.6 Thermal cycle test
12.4.7 Partial discharge test
12.4.8 Tan δ measurement
12.4.9 Load cycle voltage test
12.4.10 Impulse voltage tests
29 12.4.11 Examination of cable and accessories
12.5 Non-electrical type tests on cable components and on complete cable
12.5.1 Overview on non-electrical type tests
30 12.5.2 Check of cable construction
12.5.3 Tests for determining the mechanical properties of oversheaths before and after ageing
12.5.4 Loss of mass test on PVC oversheaths of type ST2
12.5.5 Test on PVC oversheaths (ST1 and ST2) at low temperature
31 12.5.6 Heat shock test for PVC oversheaths (ST1 and ST2)
12.5.7 Measurement of carbon black content of black PE oversheaths (ST3 and ST7)
12.5.8 Test under fire conditions
12.5.9 Pressure test of cable cryostat
32 12.5.10 Pressure test of components of accessories
13 Prequalification test of the cable system
14 Type test on cables
15 Type test on accessories
16 Tests after installation
16.1 General
33 16.2 Tests at ambient temperature
16.2.1 Vacuum test
16.2.2 Pressure test
34 16.3 Tests at operating temperature
16.3.1 General
16.3.2 DC current test
16.3.3 AC voltage test of the insulation
35 16.3.4 DC voltage test of the oversheath
36 Tables
Table 1 – Test voltages
37 Table 2 – Non-electrical type tests for oversheathing compounds for cables
38 Table 3 – Test requirements for mechanical characteristics ofoversheathing compounds for cables (before and after ageing)
Table 4 – Test requirements for particular characteristics of PVC oversheathing for cables
39 Annex A (informative)Cooling system considerations
A.1 Introductory remarks
A.2 Cryogenic refrigeration
A.2.1 General process
Figures
Figure A.1 – General refrigeration process with indication of temperature and energy flows
40 A.2.2 General hardware components
41 A.3 Recommendations for tests after installation
A.3.1 General
A.3.2 Pressure test followed by vacuum leak test
Figure A.2 – General system components and process flow
42 A.3.3 Cooling capacity test and efficiency measurement
A.3.4 Circulation pump mass flow and pressure test
A.3.5 Temperature and pressure control test
A.3.6 Noise measurements
A.3.7 Other measurements
43 Annex B (normative)Critical current measurement
B.1 Critical current measurement test
B.1.1 General
B.1.2 Procedure
B.1.3 Test method
Figure B.1 – Test setup for electrical four-probe method
44 Figure B.2 – Voltage-current characteristic for superconductor
45 Annex C (informative)Tests for engineering information
C.1 Overview
C.2 AC loss
C.2.1 General
C.2.2 Electrical method
C.2.3 Calorimetric – vaporization method
C.2.4 Calorimetric – cryogen mass flow method
46 C.3 Heat invasion of cryostat
C.3.1 General
C.3.2 Calorimetric – vaporization of liquid cryogen
C.3.3 Calorimetric – liquid cryogen mass flow method
C.4 Electrical parameters
C.5 Short-circuit tests (fault current)
47 Annex D (informative)List of type tests on cable systems
Table D.1 – Type tests on cable systems
48 Annex E (normative)Tests on outer protection for joints
E.1 General
E.2 Range of approval
E.3 Voltage tests
E.3.1 General
E.3.2 Assemblies embodying accessories without sheath sectionalizing insulation
E.3.3 Assemblies embodying sheath sectionalizing insulation
49 E.4 Examination of test assembly
Table E.1 – Impulse voltage tests
50 Annex F (informative)Prequalification test of the cable system
51 Bibliography

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BS EN 63075:2019
$198.66