1、 IEC 60947-2 Edition 5.0 2016-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear Part 2: Circuit-breakers Appareillage basse tension Partie 2: Disjoncteurs IEC 60947-2:2016-06(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva,
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19、-nous: csciec.ch. IEC 60947-2 Edition 5.0 2016-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear Part 2: Circuit-breakers Appareillage basse tension Partie 2: Disjoncteurs INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.
20、130.20 ISBN 978-2-8322-3355-9 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obten
21、u cette publication via un distributeur agr. colour inside 2 IEC 60947-2:2016 IEC 2016 CONTENTS FOREWORD 14 1 General . 16 1.1 Scope and object 16 1.2 Normative references 17 2 Terms and definitions 18 3 Classification . 22 4 Characteristics of circuit-breakers 23 4.1 Summary of characteristics . 23
22、 4.2 Type of circuit-breaker 23 4.3 Rated and limiting values of the main circuit 23 4.3.1 General 23 4.3.2 Rated voltages . 23 4.3.3 Currents . 24 4.3.4 Rated frequency . 24 4.3.5 Rated duty . 24 4.3.6 Short-circuit characteristics 24 4.4 Selectivity categories 27 4.5 Control circuits 27 4.5.1 Elec
23、trical control circuits 27 4.5.2 Air-supply control circuits (pneumatic or electro-pneumatic) 27 4.6 Auxiliary circuits 27 4.7 Releases 28 4.7.1 Types 28 4.7.2 Characteristics . 28 4.7.3 Current setting of over-current releases 28 4.7.4 Tripping time setting of over-current releases . 29 4.8 Integra
24、l fuses (integrally fused circuit-breakers) 29 5 Product information . 29 5.1 Nature of the information . 29 5.2 Marking 29 5.3 Instructions for installation, operation and maintenance . 31 6 Normal service, mounting and transport conditions 31 7 Constructional and performance requirements . 31 7.1
25、Constructional requirements 31 7.1.1 General 31 7.1.2 Withdrawable circuit-breakers 31 7.1.3 Additional requirements for circuit-breakers suitable for isolation 32 7.1.4 Clearances and creepage distances . 32 7.1.5 Requirements for the safety of the operator 32 7.1.6 List of construction breaks . 32
26、 7.1.7 Additional requirements for circuit-breakers provided with a neutral pole . 33 7.1.8 Digital inputs and outputs for use with programmable logic controllers (PLCs) . 33 7.2 Performance requirements 33 7.2.1 Operating conditions 33 IEC 60947-2:2016 IEC 2016 3 7.2.2 Temperature-rise . 36 7.2.3 D
27、ielectric properties . 37 7.2.4 Ability to make and break under no load, normal load and overload conditions 37 7.2.5 Ability to make and break under short-circuit conditions 38 7.2.6 Vacant . 39 7.2.7 Additional requirements for circuit-breakers suitable for isolation 39 7.2.8 Specific requirements
28、 for integrally fused circuit-breakers. 39 7.2.9 Co-ordination between a circuit-breaker and another short-circuit protective device 39 7.3 Electromagnetic compatibility (EMC) . 39 8 Tests . 39 8.1 Kind of tests 39 8.1.1 General 39 8.1.2 Type tests 39 8.1.3 Routine tests 40 8.2 Compliance with const
29、ructional requirements 40 8.3 Type tests . 40 8.3.1 Test sequences 40 8.3.2 General test conditions 48 8.3.3 Test sequence I: General performance characteristics 56 8.3.4 Test sequence II: Rated service short-circuit breaking capacity 65 8.3.5 Test sequence III: Rated ultimate short-circuit breaking
30、 capacity 66 8.3.6 Test sequence IV: Rated short-time withstand current 68 8.3.7 Test sequence V: Performance of integrally fused circuit-breakers 69 8.3.8 Test sequence VI: combined test sequence 71 8.3.9 Critical d.c. load current test . 73 8.4 Routine tests 74 8.4.1 General 74 8.4.2 Mechanical op
31、eration tests . 74 8.4.3 Verification of the calibration of overcurrent releases 75 8.4.4 Verification of the operation of undervoltage and shunt releases . 75 8.4.5 Additional tests for CBRs . 75 8.4.6 Dielectric tests . 76 8.4.7 Test for the verification of clearances less than those corresponding
32、 to case A of Table 13 of IEC 60947-1:2007 77 8.5 Special tests Damp heat, salt mist, vibration and shock 77 Annex A (normative) Co-ordination between a circuit-breaker and another short- circuit protective device associated in the same circuit 79 A.1 General 79 A.2 Scope and object 79 A.3 General r
33、equirements for the co-ordination of a circuit-breaker with another SCPD . 80 A.3.1 General considerations 80 A.3.2 Take-over current . 80 A.3.3 Behaviour of C 1in association with another SCPD . 80 A.4 Type and characteristics of the associated SCPD 80 A.5 Verification of selectivity . 81 A.5.1 Gen
34、eral 81 A.5.2 Consideration of selectivity by desk study . 81 4 IEC 60947-2:2016 IEC 2016 A.5.3 Selectivity determined by test . 82 A.6 Verification of back-up protection 83 A.6.1 Determination of the take-over current 83 A.6.2 Verification of back-up protection . 83 A.6.3 Tests for verification of
35、back-up protection . 83 A.6.4 Results to be obtained . 84 Annex B (normative) Circuit-breakers incorporating residual current protection 90 B.1 General 90 B.1.1 Preamble . 90 B.1.2 Scope and object . 90 B.2 Terms and definitions 91 B.2.1 Terms and definitions relating to currents flowing from live p
36、arts to earth 91 B.2.2 Terms and definitions relating to the energization of a CBR 91 B.2.3 Terms and definitions relating to the operation and the functions of a CBR 92 B.2.4 Terms and definitions relating to values and ranges of energizing quantities . 93 B.3 Classification 94 B.3.1 Classification
37、 according to the method of operation of the residual current function 94 B.3.2 Classification according to the possibility of adjusting the residual operating current . 94 B.3.3 Classification according to time-delay of the residual current function . 94 B.3.4 Classification according to behaviour
38、in presence of a d.c. component 94 B.4 Characteristics of CBRs concerning their residual current function . 94 B.4.1 Rated values 94 B.4.2 Preferred and limiting values 95 B.4.3 Value of the rated residual short-circuit making and breaking capacity (I m ) . 96 B.4.4 Operating characteristics in case
39、 of an earth fault current in the presence or absence of a d.c. component 96 B.5 Marking 96 B.6 Normal service, mounting and transport conditions 97 B.7 Design and operating requirements . 98 B.7.1 Design requirements 98 B.7.2 Operating requirements 98 B.7.3 Electromagnetic compatibility . 100 B.8 T
40、ests 100 B.8.1 General 100 B.8.2 Verification of the operating characteristic 103 B.8.3 Verification of dielectric properties 105 B.8.4 Verification of the operation of the test device at the limits of rated voltage 105 B.8.5 Verification of the limiting value of the non-operating current under over
41、-current conditions 105 B.8.6 Verification of the resistance against unwanted tripping due to surge currents resulting from impulse voltages 106 B.8.7 Verification of the behaviour of CBRs of type A in the case of an earth fault current comprising a d.c. component 107 IEC 60947-2:2016 IEC 2016 5 B.8
42、.8 Verification of the behaviour of CBRs functionally dependent on line voltage classified under B.3.1.2.1 . 108 B.8.9 Verification of the behaviour of CBRs functionally dependent on line voltage as classified under B.3.1.2.2 in the case of failure of line voltage 109 B.8.10 Verification of the resi
43、dual short-circuit making and breaking capacity 110 B.8.11 Verification of the effects of environmental conditions . 111 B.8.12 Verification of electromagnetic compatibility . 111 B.8.13 Test for variations or interruptions of voltage and for voltage dips . 113 Annex C (normative) Individual pole sh
44、ort-circuit test sequence 121 C.1 General 121 C.2 Test of individual pole short-circuit breaking capacity 121 C.3 Verification of dielectric withstand . 121 C.4 Verification of overload releases . 121 Annex D Vacant 122 Annex E (informative) Items subject to agreement between manufacturer and user 1
45、23 Annex F (normative) Additional tests for circuit-breakers with electronic over-current protection . 124 F.1 General 124 F.2 List of tests . 124 F.2.1 General 124 F.2.2 Electromagnetic compatibility (EMC) tests 124 F.2.3 Suitability for multiple frequencies 125 F.2.4 Dry heat test 125 F.2.5 Damp h
46、eat test 125 F.2.6 Temperature variation cycles at a specified rate of change . 125 F.3 General test conditions . 125 F.3.1 General 125 F.3.2 Electromagnetic compatibility tests . 125 F.4 Immunity tests 126 F.4.1 Harmonic currents 126 F.4.2 Electrostatic discharges . 127 F.4.3 Radiated RF electromag
47、netic fields 127 F.4.4 Electrical fast transient/burst (EFT/B) . 127 F.4.5 Surges . 128 F.4.6 Conducted disturbances induced by RF fields (common mode) . 128 F.4.7 Current dips . 128 F.5 Emission tests 129 F.5.1 Harmonics . 129 F.5.2 Voltage fluctuations 129 F.5.3 Conducted RF disturbances (150 kHz
48、to 30 MHz) . 129 F.5.4 Radiated RF disturbances (30 MHz to 1 GHz) . 129 F.6 Suitability for multiple frequencies . 130 F.6.1 General 130 F.6.2 Test conditions. 130 F.6.3 Test procedure . 130 F.6.4 Test results 130 F.7 Dry heat test . 131 F.7.1 Test procedure . 131 6 IEC 60947-2:2016 IEC 2016 F.7.2 T
49、est results 131 F.7.3 Verification of overload releases 131 F.8 Damp heat test . 131 F.8.1 Test procedure . 131 F.8.2 Verification of overload releases 131 F.9 Temperature variation cycles at a specified rate of change 131 F.9.1 Test conditions. 131 F.9.2 Test procedure . 132 F.9.3 Test results 132 F.9.4 Verification of overload releases 132 Annex G (normative) Power loss 145 G.1 General 145 G.2 Test methods 145 G.2.1 General case . 145 G.2.2 AC circuit-breaker
