BS EN 62271-107:2012
$198.66
High-voltage switchgear and controlgear – Alternating current fused circuit-switchers for rated voltages above 1 kV up to and including 52 kV
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 52 |
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 operated units for distribution systems that are functional assemblies of a circuit-switcher and current-limiting fuses designed so as to be capable of:
-
breaking, at the rated recovery voltage, any load or fault 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.
They are intended to be used for circuits or applications requiring only a normal mechanical and electrical endurance capability. Such applications cover protection of HV/LV transformers for instance, but exclude distribution lines or cables, as well as motor circuits and capacitor bank circuits.
Short-circuit conditions with low currents, up to the fused circuit-switcher rated take-over current, are dealt with by supplementary devices (strikers, relays, etc.), properly arranged, tripping the circuit-switcher. Fuses are incorporated in order to ensure that the short-circuit breaking capacity of the device is above that of the circuit-switcher.
NOTE 1 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 fused circuit-switchers 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. Comparison with other existing switching devices is provided in Clause 8.
NOTE 2 Other circuit-switchers exist; see reference [1]1.
Devices that require a dependent manual operation are not covered by this standard.
Fuses are covered by IEC 60282-1.
Earthing switches forming an integral part of a circuit-switcher are covered by IEC 62271-102.
Installation in enclosure, if any, is covered either by IEC 62271-200 or by IEC 62271-201.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 10 | 1 General 1.1 Scope 1.2 Normative references |
| 11 | 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 3.6 Operation |
| 13 | 3.7 Characteristic quantities |
| 15 | 3.101 Fuses 4 Ratings |
| 16 | 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 4.4.101 Rated maximum thermal current (Ith) 4.5 Rated short-time withstand current (Ik) 4.6 Rated peak withstand current (Ip) |
| 17 | 4.7 Rated duration of short circuit (tk) 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 Isc 4.102 Rated transient recovery voltage 4.103 Rated short-circuit making current |
| 18 | 4.104 Rated take-over current 5 Design and construction 5.1 Requirements for liquids in fused circuit-switchers 5.2 Requirements for gases in fused circuit-switchers 5.3 Earthing of fused circuit-switchers 5.4 Auxiliary and control equipment Figures Figure 1 – Characteristics for determining the take-over current |
| 19 | 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 Tables Table 1 – Nameplate markings |
| 20 | 5.11 Interlocking devices 5.12 Position indication 5.13 Degrees of protection by enclosures 5.14 Creepage distances for outdoor insulators 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 |
| 21 | 5.101 Linkages between the fuse striker(s) and the circuit-switcher release 5.102 Low over-current conditions (long fuse pre-arcing time conditions) 6 Type tests 6.1 General |
| 22 | 6.1.1 Grouping of tests 6.1.2 Information for identification of specimens 6.1.3 Information to be included in type-test reports 6.2 Dielectric tests 6.3 Radio interference voltage (r.i.v.) test 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 |
| 23 | 6.8 Tightness tests 6.9 Electromagnetic compatibility tests (EMC) 6.10 Additional tests on auxiliary and control circuits 6.11 X-radiation test procedure for vacuum interrupters 6.101 Making and breaking tests 6.101.1 Conditions for performing the tests |
| 25 | Figure 2 – Arrangement of test circuits for test duties TDIth, TDIsc, TDIto and TDIlow |
| 27 | Figure 3 – Representation of a specified TRV by a two-parameter reference line and a delay line |
| 28 | 6.101.2 Test duty procedures Figure 4 – Example of a two parameters envelope for a TRV |
| 30 | Figure 5 – Measurement of the power frequency recovery voltage with striker operation |
| 32 | Table 2 – Summary of test parameters for test duties |
| 33 | 6.101.3 Behaviour of the fused circuit-switcher during tests 6.101.4 Condition of the apparatus after tests |
| 34 | 6.102 Mechanical operation tests |
| 35 | 6.102.1 Condition of fused circuit-switcher during and after mechanical operation tests 6.102.2 Condition of the fuses during and after mechanical operation tests 6.103 Extension of validity of type tests 6.103.1 Dielectric properties 6.103.2 Temperature rise |
| 36 | 6.103.3 Making and breaking 7 Routine tests 7.101 Mechanical operating tests |
| 37 | 8 Guide for the selection of fused circuit-switchers 8.1 Selection of rated values 8.2 Continuous or temporary overload due to changed service conditions 8.101 Additional criteria 8.102 Short-circuit breaking current |
| 38 | 8.103 Rated maximum thermal current 8.104 Currents between thermal current and I3 of the fuses 8.105 Transfer current 8.106 Take-over current 8.107 Extension of the validity of type tests |
| 39 | 8.108 Operation 8.109 Comparison of performances of fused circuit-switchers with performances of switch-fuse combinations and circuit-breakers |
| 40 | 9 Information to be given with enquiries, tenders and orders 9.1 Information to be given with enquiries and orders 9.2 Information to be given with tenders Table 3 – Comparison between switch-fuse combination and fused circuit-switcher Table 4 – Comparison between fused circuit-switcher and circuit breaker |
| 41 | 10 Rules for transport, storage, installation, operation and maintenance 11 Safety 12 Influence of the product on the environment |
| 42 | Annex A (informative) Applicability of the rated take-over current test duty |
| 44 | Figure A.1 – Visualization of the application margin for a given fuse |
| 47 | Table A.1 – Minimum application margin Am according to fuse characteristic |
| 48 | Table A.2 – Minimum protection time delay Table A.3 – Examples of possible need for time delay |
| 50 | Bibliography |
