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BS EN IEC 62271-112:2021

BS EN IEC 62271-112:2021

$167.15

High-voltage switchgear and controlgear – Alternating current high-speed earthing switches for secondary arc extinction on transmission lines

Published By Publication Date Number of Pages
BSI 2021 34
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This part of IEC 62271 applies to AC high-speed earthing switches (hereafter termed HSES) designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having voltages of 550 kV and above. HSESs described in this document are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers. For more detailed information on HSESs, refer to Annex A.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
3 Terms and definitions
12 Figure 1 ā€“ Explanation of a multi-phase auto-reclosing scheme
13 4 Normal and special service conditions
5 Ratings
Figures
15 6 Design and construction
Figure 2 ā€“ Timing chart of HSES and circuit-breakers
16 Tables
Table 1 ā€“ Nameplate information
17 7 Type tests
18 Table 2 ā€“ Standard values of rated induced currents and voltages
20 8 Routine tests
9 Guide to the selection of HSESs (informative)
10 Information to be given with enquiries, tenders and orders (informative)
11 Transport, storage, installation, operating instructions and maintenance
21 12 Safety
22 Annex A (informative) Background information on the use of HSESs
23 Figure A.1 ā€“ Single-line diagram of a power system
Figure A.2 ā€“ Timing chart of the HSESs in relation to the transmission line circuit-breakers
24 Figure A.3 ā€“ Typical timing chart showing the time between fault initiation and a successful re-close of the transmission line circuit-breakers
25 Table A.1 ā€“ Comparison of earthing switches
26 Table A.2 ā€“ Comparison of a four-legged reactor and HSES
27 Annex B (informative) Induced current and voltage conditions for other cases
28 Figure B.1 ā€“ System condition to explain successive fault
Figure B.2 ā€“ Example of waveforms of delayed current zero phenomena
29 Table B.1 ā€“ Preferred values for single-phase earth fault with delayed current zero phenomena in the presence of a successive fault
30 Figure B.3 ā€“ Typical test circuit for electromagnetic coupling test-duty of a HSES with delayed current zero crossings
Figure B.4 ā€“ Typical test circuit for electrostatic coupling test-duty of HSES with delayed current zero crossings
31 Table B.2 ā€“ Preferred values for multi-phase earth faults in a double-circuit system
Table B.3 ā€“ Preferred values for covering the cases of categories 0 and 1
32 Bibliography

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BS EN IEC 62271-112:2021
$167.15