BS EN 62271-105:2012:2013 Edition
$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 | 2013 | 56 |
Subclause 1.1 of IEC 62271-1:2007 is not applicable, and is replaced as follows:.
This part of IEC 62271 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches including switch-disconnectors and current-limiting fuses designed so as to be capable of
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breaking, at the rated recovery voltage, any current up to and including the rated short-circuit breaking current;
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making, at the rated voltage, circuits to which the rated short-circuit breaking current applies.
It does not apply to fuse-circuit-breakers, fuse-contactors, combinations for motor-circuits or to combinations incorporating single capacitor bank switches.
In this standard, the word “combination” is used for a combination in which the components constitute a functional assembly. Each association of a given type of switch and a given type of fuse defines one type of combination.
In practice, different types of fuses may be combined with one type of switch, which give several combinations with different characteristics, in particular concerning the rated currents. Moreover, for maintenance purposes, the user should know the types of fuses that can be combined to a given switch without impairing compliance to the standard, and the corresponding characteristics of the so-made combination.
A switch-fuse combination is then defined by its type designation and a list of selected fuses is defined by the manufacturer, the so-called “reference list of fuses”. Compliance with this standard of a given combination means that every combination using one of the selected fuses is proven to be in compliance with this standard.
The fuses are incorporated in order to extend the short-circuit breaking rating of the combination beyond that of the switch alone. They are fitted with strikers in order both to open automatically all three poles of the switch on the operation of a fuse and to achieve a correct operation at values of fault current above the minimum melting current but below the minimum breaking current of the fuses. In addition to the fuse strikers, the combination may be fitted with either an over-current release or a shunt release.
NOTE In this standard the term “fuse” is used to designate either the fuse or the fuse-link where the general meaning of the text does not result in ambiguity.
This standard applies to combinations designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz.
Fuses are covered by IEC 60282-1.
Devices that require dependent manual operation are not covered by this standard.
Switches, including their specific mechanism, shall be in accordance with IEC 62271-103 except for the short-time current and short-circuit making requirements where the currentlimiting effects of the fuses are taken into account.
Earthing switches forming an integral part of a combination are covered by IEC 62271-102.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 10 | 1 General 1.1 Scope |
| 11 | 1.2 Normative references 2 Normal and special service conditions 3 Terms and definitions 3.1 General terms 3.2 Assemblies of switchgear and controlgear 3.3 Parts of assemblies 3.4 Switching devices |
| 12 | 3.5 Parts of switchgear and controlgear |
| 13 | 3.6 Operation 3.7 Characteristic quantities |
| 17 | 3.101 Fuses |
| 18 | 4 Ratings 4.1 Rated voltage (Ur) 4.2 Rated insulation level 4.3 Rated frequency (fr) 4.4 Rated normal current and temperature rise 4.4.1 Rated normal current (Ir) 4.4.2 Temperature rise 4.5 Rated short-time withstand current (Ik) 4.6 Rated peak withstand current (Ip) 4.7 Rated duration of short-circuit (tk) |
| 19 | 4.8 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (Ua) 4.9 Rated supply frequency of closing and opening devices and of auxiliary circuits 4.10 Rated pressure of compressed gas supply for controlled pressure systems 4.11 Rated filling levels for insulation and/or operation 4.101 Rated short-circuit breaking current 4.102 Rated transient recovery voltage 4.103 Rated short-circuit making current |
| 20 | 4.104 Rated transfer current (striker operation) (Irtransfer) 4.105 Rated take-over current for release-operated combinations (Ito) 5 Design and construction 5.1 Requirements for liquids in switch-fuse combinations 5.2 Requirements for gases in switch-fuse combinations 5.3 Earthing of switch-fuse combinations 5.4 Auxiliary and control equipment 5.5 Dependent power operation 5.6 Stored energy operation 5.7 Independent manual or power operation (independent unlatched operation) 5.8 Operation of releases 5.9 Low- and high-pressure interlocking and monitoring devices 5.10 Nameplates |
| 21 | 5.11 Interlocking devices 5.12 Position indication 5.13 Degrees of protection provided by enclosures 5.14 Creepage distances for outdoor insulators Tables Table 1 – Nameplate markings |
| 22 | 5.15 Gas and vacuum tightness 5.16 Liquid tightness 5.17 Fire hazard (flammability) 5.18 Electromagnetic compatibility (EMC) 5.19 X-ray emission 5.20 Corrosion 5.101 Linkages between the fuse striker(s) and the switch release 5.102 Low over-current conditions (long fuse-pre-arcing time conditions) |
| 23 | 6 Type tests 6.1 General 6.1.1 Grouping of tests |
| 24 | 6.1.2 Information for identification of specimens 6.1.3 Information to be included in the type-test reports 6.2 Dielectric tests 6.3 Radio interference voltage (r.i.v.) tests 6.4 Measurement of the resistance of circuits 6.5 Temperature-rise tests 6.6 Short-time withstand current and peak withstand current tests 6.7 Verification of the protection 6.8 Tightness tests 6.9 Electromagnetic compatibility tests (EMC) 6.10 Additional tests on auxiliary and control circuits |
| 25 | 6.11 X-radiation test procedure for vacuum interrupters 6.101 Making and breaking tests 6.101.1 General 6.101.2 Conditions for performing the tests |
| 26 | Figures Figure 1 – Arrangement of test circuits for test duties TDIsc and TDIWmax |
| 27 | Figure 2 – Arrangement of test circuits for test-duty TDItransfer Figure 3 – Arrangement of test circuits for test-duty TDIto |
| 29 | Figure 4 – Determination of power-frequency recovery voltage |
| 30 | Figure 5 – Representation of a specified TRV by a two-parameter reference line and a delay line |
| 31 | 6.101.3 Test-duty procedures Figure 6 – Example of a two-parameter reference line for a TRV |
| 33 | Table 2 – Standard values of prospective TRV for test-duty TDItransfer basedon practice in Europe |
| 34 | Table 3 – Standard values of prospective TRV for test-duty TDItransfer based on practice in the United States of America and Canada |
| 35 | Figure 7 – Characteristics for determining take-over current Table 4 – Summary of test parameters for test duties |
| 36 | 6.101.4 Behaviour of the combination during tests 6.101.5 Condition of the apparatus after testing |
| 37 | 6.102 Mechanical operation tests 6.103 Mechanical shock tests on fuses |
| 38 | 6.104 Thermal test with long pre-arcing time of fuse 6.105 Extension of validity of type tests 6.105.1 Dielectric 6.105.2 Temperature rise 6.105.3 Making and breaking |
| 39 | 7 Routine tests 7.101 Mechanical operating tests 8 Guide for the selection of switch-fuse combinations 8.1 Selection of rated values |
| 40 | 8.2 Continuous or temporary overload due to changed service conditions 8.101 Guide for the selection of switch-fuse combination for transformer protection 8.101.1 General 8.101.2 Rated short-circuit breaking current 8.101.3 Primary fault condition caused by a solid short-circuit on the transformer secondary terminals |
| 41 | 8.102 Coordination of switch and fuses for extension of the reference list 8.102.1 General 8.102.2 Rated normal current Figure 8 – Transfer current in relation to the primary fault current Isc due to a solid short circuit in the transformer secondary terminal |
| 42 | 8.102.3 Low over-current performance 8.102.4 Transfer current 8.102.5 Take-over current 8.102.6 Extension of the validity of type tests 8.103 Operation |
| 43 | 9 Information to be given with enquiries, tenders and orders 9.1 Information with enquiries and orders 9.2 Information with tenders 10 Transport, storage, installation, operation and maintenance |
| 44 | 11 Safety 12 Influence of the product on the environment |
| 45 | Annex A (informative) Example of the coordination of fuses, switch and transformer |
| 46 | Figure A.1 – Characteristics relating to the protection of an 11 kV – 400 kVA transformer |
| 47 | Figure A.2 – Discrimination between HV and LV fuses |
| 48 | Annex B (normative) Procedure for determining transfer current |
| 49 | Figure B.1 – Practical determination of the transfer current |
| 51 | Figure B.2 – Determination of the transfer current with the iterative method |
| 53 | Annex C (normative) Tolerances on test quantities for type tests Table C.1 – Tolerances on test quantities for type tests |
| 54 | Bibliography |
