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BS EN IEC 62271-105:2023

BS EN IEC 62271-105:2023

$198.66

High-voltage switchgear and controlgear – Alternating current switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV

Published By Publication Date Number of Pages
BSI 2023 58
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IEC 62271-105:2021 is available as IEC 62271-105:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 62271-105:2021 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches composed of switches or switch-disconnectors and current-limiting fuses designed so as to be capable of – breaking, at the rated voltage, any current up to and including the rated short-circuit breaking current; – making, at the rated voltage, circuits to which the rated short-circuit breaking current applies. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – the document has been updated to be in alignment with the second edition of IEC 62271-1:2017; – rated TRV has been removed (TRV is only a test parameter), as in the latest revision of IEC 62271-100; – differentiation has been introduced between requirements expressed for fulfilling the function expected from a switch-fuse combination, from requirements only relevant when the function is performed by a stand-alone device. The goal is to avoid duplication or conflicts of requirements with a standard dealing with assemblies, when the function is implemented within such an assembly.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 Annex ZB (informative)A-deviations
7 English
CONTENTS
10 FOREWORD
12 1 Scope
13 2 Normative references
3 Terms and definitions
3.1 General terms and definitions
3.2 Assemblies of switchgear and controlgear
3.3 Parts of assemblies
3.4 Switching devices
14 3.5 Parts of switchgear and controlgear
15 3.6 Operational characteristics of switchgear and controlgear
3.7 Characteristic quantities
18 3.101 Fuses
19 4 Normal and special service conditions
5 Ratings
5.1 General
20 5.2 Rated voltage (Ur)
5.3 Rated insulation level (Ud, Up, Us)
5.4 Rated frequency (fr)
5.5 Rated continuous current (Ir)
5.6 Rated short-time withstand current (Ik)
5.7 Rated peak withstand current (Ip)
5.8 Rated duration of short-circuit (tk)
5.9 Rated supply voltage of auxiliary and control circuits (Ua)
5.10 Rated supply frequency of auxiliary and control circuits
5.11 Rated pressure of compressed gas supply for controlled pressure systems
21 5.101 Rated short-circuit breaking current
5.102 Rated short-circuit making current
5.103 Rated transfer current (striker operation) (Irtransfer)
5.104 Rated take-over current for release-operated combinations (Irto)
6 Design and construction
6.1 Requirements for liquids in switch-fuse combinations
6.2 Requirements for gases in switch-fuse combinations
6.3 Earthing of switch-fuse combinations
22 6.4 Auxiliary and control equipment and circuits
6.5 Dependent power operation
6.6 Stored energy operation
6.7 Independent unlatched operation (independent manual or power operation)
6.8 Manually operated actuators
6.9 Operation of releases
6.10 Pressure/level indication
6.11 Nameplates
23 Tables
Table 1 – Nameplate information
24 6.12 Locking devices
6.13 Position indication
6.14 Degrees of protection provided by enclosures
6.15 Creepage distances for outdoor insulators
6.16 Gas and vacuum tightness
6.17 Tightness for liquid systems
6.18 Fire hazard (flammability)
6.19 Electromagnetic compatibility (EMC)
6.20 X-ray emission
6.21 Corrosion
6.22 Filling levels for insulation, switching and/or operation
6.101 Linkages between the fuse striker(s) and the switch release
6.102 Low over-current conditions (long fuse-pre-arcing time conditions)
25 7 Type tests
7.1 General
7.1.1 Basics
7.1.2 Information for identification of test objects
7.1.3 Information to be included in type-test reports
26 7.2 Dielectric tests
7.3 Radio interference voltage (RIV) test
7.4 Resistance measurement
7.5 Continuous current tests
7.6 Short-time withstand current and peak withstand current tests
7.7 Verification of the protection
7.8 Tightness tests
7.9 Electromagnetic compatibility tests (EMC)
7.10 Additional tests on auxiliary and control circuits
7.11 X-radiation test for vacuum interrupters
27 7.101 Making and breaking tests
7.101.1 General
7.101.2 Conditions for performing the tests
28 Figures
Figure 1 – Arrangement of test circuits for test duties TDIsc and TDIWmax
Table 2 – Summary of the conditions for combining tests and alternative procedures
29 Figure 2 – Arrangement of test circuits for test-duty TDItransfer
Figure 3 – Arrangement of test circuits for test-duty TDIto
31 Figure 4 – Determination of power-frequency recovery voltage
32 Figure 5 – Representation of a specified TRV by a two-parameter reference line and a delay line
33 7.101.3 Test-duty procedures
Figure 6 – Example of a two-parameter reference line for a TRV
35 Table 3 – Values of prospective TRV for test-duty TDItransfer based on practice in Europe
36 Table 4 – Values of prospective TRV for test-duty TDItransfer based on practice in the United States of America
37 Figure 7 – Characteristics for determining take-over current
38 7.101.4 Behaviour of the combination during tests
Table 5 – Summary of test parameters for test duties
39 7.101.5 Condition of the apparatus after testing
40 7.102 Mechanical operation tests
7.103 Mechanical shock tests on fuses
7.104 Thermal test with long pre-arcing time of fuse
41 7.105 Extension of validity of type tests
7.105.1 Dielectric
7.105.2 Continuous current tests
7.105.3 Making and breaking
8 Routine tests
42 8.101 Mechanical operating tests
9 Guide to the selection of switch-fuse combinations (informative)
9.101 Guide to the selection of switch-fuse combination for transformer protection
9.101.1 General
43 9.101.2 Rated short-circuit breaking current
9.101.3 Primary fault condition caused by a solid short-circuit on the transformer secondary terminals
Figure 8 – Transfer current in relation to the primary fault current Isc due to a solid short circuit in the transformer secondary terminal
44 9.102 Coordination of switch and fuses for extension of the reference list of fuses
9.102.1 General
9.102.2 Rated continuous current
9.102.3 Low over-current performance
9.102.4 Transfer current
9.102.5 Take-over current
45 9.102.6 Extension of the validity of type tests
10 Information to be given with enquiries, tenders and orders (informative)
10.1 General
10.2 Information with enquiries and orders
10.3 Information with tenders
11 Transport, storage, installation, operating instructions and maintenance
46 12 Safety
13 Influence of the product on the environment
47 Annex A (informative) Example of the coordination of fuses, switch and transformer
48 Figure A.1 – Characteristics relating to theprotection of an 11 kV, 400 kVA transformer
49 Figure A.2 – Discrimination between HV and LV fuses
50 Annex B (normative) Procedures for determining transfer current
B.1 Background
B.2 Mathematical determination of T
51 Figure B.1 – Practical determination of the transfer current
53 B.3 Simplified method for determination of transfer current
Figure B.2 – Determination of the transfer current with the iterative method
55 Annex C (normative)Tolerances on test quantities for type tests
Table C.1 – Tolerances on test quantities for type tests
57 Bibliography

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BS EN IEC 62271-105:2023
$198.66