IEC 60898-1-2015 Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1 Circuit-breakers for a.c .pdf

1、 IEC 60898-1 Edition 2.0 2015-03 INTERNATIONAL STANDARD Electrical accessories Circuit-breakers for overcurrent protection for household and similar installations Part 1: Circuit-breakers for a.c. operation IEC 60898-1:2015-03(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, S

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11、rs for overcurrent protection for household and similar installations Part 1: Circuit-breakers for a.c. operation INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.120.50 ISBN 978-2-8322-2422-9 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained

12、this publication from an authorized distributor. 2 IEC 60898-1:2015 IEC 2015 CONTENTS FOREWORD . 9 1 Scope 11 2 Normative references 12 3 Terms and definitions 13 3.1 Devices . 13 3.2 General terms . 14 3.3 Constructional elements 16 3.4 Conditions of operation . 18 3.5 Characteristic quantities . 1

13、9 3.6 Definitions related to insulation co-ordination 23 4 Classification . 25 4.1 General . 25 4.2 According to the number of poles: . 25 4.3 According to the protection against external influences: 26 4.4 According to the method of mounting: . 26 4.5 According to the methods of connection 26 4.5.1

14、 According to the fixation system: . 26 4.5.2 According to the type of terminals: . 26 4.6 According to the instantaneous tripping current (see 3.5.17) . 26 4.7 According to the I 2 t characteristic. 26 5 Characteristics of circuit-breakers 26 5.1 List of characteristics 26 5.2 Rated quantities 27 5

15、.2.1 Rated voltages 27 5.2.2 Rated current (I n ) 27 5.2.3 Rated frequency 27 5.2.4 Rated short-circuit capacity (I cn ) . 28 5.2.5 Rated making and breaking capacity of an individual pole (I cn1 ) . 28 5.3 Standard and preferred values 28 5.3.1 Preferred values of rated voltage . 28 5.3.2 Preferred

16、 values of rated current . 29 5.3.3 Standard values of rated frequency . 29 5.3.4 Values of rated short-circuit capacity . 29 5.3.5 Standard ranges of instantaneous tripping . 30 5.3.6 Standard values of rated impulse withstand voltage (U imp ) . 30 6 Marking and other product information . 30 7 Sta

17、ndard conditions for operation in service 32 7.1 General . 32 7.2 Ambient air temperature range 32 7.3 Altitude . 32 7.4 Atmospheric conditions . 33 7.5 Conditions of installation . 33 7.6 Pollution degree 33 8 Requirements for construction and operation . 33 8.1 Mechanical design 33 IEC 60898-1:201

18、5 IEC 2015 3 8.1.1 General . 33 8.1.2 Mechanism 33 8.1.3 Clearances and creepage distances (see Annex B) . 35 8.1.4 Screws, current-carrying parts and connections . 37 8.1.5 Terminals for external conductors 38 8.1.6 Non-interchangeability . 40 8.1.7 Mechanical mounting of plug-in type circuit-break

19、ers . 41 8.2 Protection against electric shock . 41 8.3 Dielectric properties and isolating capability 41 8.3.1 General . 41 8.3.2 Dielectric strength at power frequency . 42 8.3.3 Isolating capability . 42 8.3.4 Dielectric strength at rated impulse withstand voltage (U imp ) 42 8.4 Temperature-rise

20、 42 8.4.1 Temperature-rise limits 42 8.4.2 Ambient air temperature 42 8.5 Uninterrupted duty 43 8.6 Automatic operation 43 8.6.1 Standard time-current zone . 43 8.6.2 Conventional quantities . 44 8.6.3 Tripping characteristic . 44 8.7 Mechanical and electrical endurance 45 8.8 Performance at short-c

21、ircuit currents 45 8.9 Resistance to mechanical shock and impact . 45 8.10 Resistance to heat 45 8.11 Resistance to abnormal heat and to fire 46 8.12 Resistance to rusting 46 8.13 Power loss 46 9 Tests . 46 9.1 Type tests and test sequences 46 9.2 Test conditions . 47 9.3 Test of indelibility of mar

22、king 48 9.4 Test of reliability of screws, current-carrying parts and connections 48 9.5 Tests of reliability of screw-type terminals for external copper conductors. 50 9.6 Test of protection against electric shock . 51 9.7 Test of dielectric properties . 52 9.7.1 Resistance to humidity . 52 9.7.2 I

23、nsulation resistance of the main circuit . 52 9.7.3 Dielectric strength of the main circuit . 53 9.7.4 Insulation resistance and dielectric strength of auxiliary circuits. 54 9.7.5 Verification of impulse withstand voltages (across clearances and across solid insulation) and of leakage current acros

24、s open contacts . 54 9.8 Test of temperature-rise and measurement of power loss . 57 9.8.1 Ambient air temperature 57 9.8.2 Test procedure 58 9.8.3 Measurement of the temperature of parts 58 9.8.4 Temperature-rise of a part . 58 9.8.5 Measurement of power loss . 58 9.9 28-day test 58 4 IEC 60898-1:2

25、015 IEC 2015 9.10 Test of tripping characteristic 59 9.10.1 General . 59 9.10.2 Test of time-current characteristic 59 9.10.3 Test of instantaneous tripping, of correct opening of the contacts and of the trip-free function 59 9.10.4 Test of effect of single-pole loading on the tripping characteristi

26、c of multipole circuit-breakers . 60 9.10.5 Test of effect of ambient temperature on the tripping characteristic . 60 9.11 Verification of mechanical and electrical endurance 61 9.11.1 General test conditions 61 9.11.2 Test procedure 61 9.11.3 Condition of the circuit-breaker after test . 62 9.12 Sh

27、ort-circuit tests 62 9.12.1 General . 62 9.12.2 Values of test quantities 63 9.12.3 Tolerances on test quantities . 63 9.12.4 Test circuit for short-circuit performance 63 9.12.5 Power factor of the test circuit . 65 9.12.6 Measurement and verification of I 2 t and of the peak current (I p ) . 65 9.

28、12.7 Calibration of the test circuit 65 9.12.8 Interpretation of records 65 9.12.9 Condition of the circuit-breaker for test 66 9.12.10 Behaviour of the circuit-breaker during short-circuit tests . 67 9.12.11 Test procedure 67 9.12.12 Verification of the circuit breaker after short circuit tests.: 7

29、2 9.13 Mechanical stresses . 73 9.13.1 Mechanical shock 73 9.13.2 Resistance to mechanical stresses and impact 74 9.14 Test of resistance to heat 77 9.15 Resistance to abnormal heat and to fire 78 9.16 Test of resistance to rusting 79 Annex A (informative) Determination of short-circuit power factor

30、 93 A.1 General . 93 A.2 Method 1 Determination from d.c. component 93 A.3 Method 2 Determination with pilot generator 93 Annex B (normative) Determination of clearances and creepage distances 94 B.1 General . 94 B.2 Orientation and location of a creepage distance 94 B.3 Creepage distances where mor

31、e than one material is used . 94 B.4 Creepage distances split by floating conductive part . 94 B.5 Measurement of creepage distances and clearances 94 Annex C (normative) Test sequences and number of samples . 99 C.1 Test sequences 99 C.2 Number of samples to be submitted for full test procedure and

32、 acceptance criteria 101 C.3 Number of samples to be submitted for simplified test procedure 101 Annex D (informative) Co-ordination under short-circuit conditions between a circuit- breaker and another short-circuit protective device (SCPD) associated in the same circuit 105 IEC 60898-1:2015 IEC 20

33、15 5 D.1 General . 105 D.2 Overview. 105 D.3 General requirements for the co-ordination of a circuit-breaker with another SCPD . 106 D.3.1 General consideration 106 D.3.2 Take-over current 106 D.3.3 Behaviour of C 1in association with another SCPD 106 D.4 Type and characteristics of the associated S

34、CPD . 106 D.5 Verification of selectivity . 107 D.6 Verification of back-up protection 107 D.6.1 Determination of the take-over current . 107 D.6.2 Verification of back-up protection . 107 D.6.3 Tests for verification of back-up protection 108 D.6.4 Results to be obtained . 109 Annex E (normative) S

35、pecial requirements for auxiliary circuits for safety extra-low voltage 112 Annex F (informative) Examples of terminals . 113 Annex G (informative) Correspondence between ISO and AWG copper conductors . 116 Annex H (normative) Arrangement for short-circuit test 117 Annex I (normative) Routine tests

36、120 I.1 General . 120 I.2 Tripping tests 120 I.3 Verification of clearances between open contacts . 120 Annex J (normative) Particular requirements for circuit-breakers with screwless type terminals for external copper conductors. 121 J.1 Scope . 121 J.2 Normative references 121 J.3 Terms and defini

37、tions 121 J.4 Classification 122 J.5 Characteristics of circuit-breakers . 122 J.6 Marking . 122 J.7 Standard conditions for operation in service 122 J.8 Constructional requirements . 123 J.8.1 Connection or disconnection of conductors 123 J.8.2 Dimensions of connectable conductors 123 J.8.3 Connect

38、able cross-sectional areas 124 J.8.4 Insertion and disconnection of conductors . 124 J.8.5 Design and construction of terminals . 124 J.8.6 Resistance to ageing . 125 J.9 Tests 125 J.9.1 Test of reliability of screwless terminals . 125 J.9.2 Tests of reliability of terminals for external conductors:

39、 mechanical strength . 126 J.9.3 Cycling test 126 J.10 Reference documents . 128 Annex K (normative) Particular requirements for circuit-breakers with flat quick- connect terminations . 130 K.1 Scope . 130 K.2 Normative references 130 6 IEC 60898-1:2015 IEC 2015 K.3 Terms and definitions 130 K.4 Cla

40、ssification 131 K.5 Characteristics of circuit-breakers . 131 K.6 Marking . 131 K.7 Standard conditions for operation in service 131 K.8 Constructional requirements . 131 K.8.1 Clearances and creepage distances (see Annex B) . 131 K.8.2 Terminals for external conductors 132 K.9 Tests 132 K.9.1 Mecha

41、nical overload-force . 132 K.10 Reference documents . 136 Annex L (normative) Specific requirements for circuit-breakers with screw-type terminals for external untreated aluminium conductors and with aluminium screw-type terminals for use with copper or with aluminium conductors 137 L.1 Scope . 137

42、L.2 Normative references 137 L.3 Terms and definitions 137 L.4 Classification 138 L.5 Characteristics of circuit-breakers . 138 L.6 Marking . 138 L.7 Standard conditions for operation in service 138 L.8 Constructional requirements . 139 L.9 Tests 139 L.9.1 Test conditions 141 L.9.2 Current cycling t

43、est 141 Bibliography 147 Figure 1 Thread forming tapping screw (3.3.22) . 79 Figure 2 Thread cutting tapping screw (3.3.23) 79 Figure 3 Typical diagram for all short circuit tests except for 9.12.11.2.2) . 80 Figure 4 Typical diagram for short circuit tests according to 9.12.11.2.2) . 81 Figure 5 De

44、tail of impedance Z and Z 181 Figure 6 Example of short-circuit making or breaking test record in the case of a single-pole device on single phase a.c. . 83 Figure 7 Mechanical shock test apparatus (9.13.1) 84 Figure 8 Standard test finger (9.6) . 85 Figure 9 Mechanical impact test apparatus (9.13.2

45、) . 86 Figure 10 Striking element for pendulum for mechanical impact test apparatus (9.13.2) . 87 Figure 11 Mounting support for mechanical impact test (9.13.2) . 88 Figure 12 Example of mounting for a rear fixed circuit-breaker for mechanical impact test (9.13.2) 89 Figure 13 Example of mounting of

46、 a panel board type circuit-breaker for mechanical impact test (9.13.2) . 90 Figure 14 Application of force for mechanical test on a rail-mounted circuit-breaker (9.13.2.3) 91 Figure 15 Ball-pressure test apparatus. 91 IEC 60898-1:2015 IEC 2015 7 Figure 16 Example of application of force for mechani

47、cal test on two-pole plug-in circuit-breaker, the holding in position of which depends solely on the plug-in connections (9.13.2.4) 92 Figure 17 Diagrammatic representation (9.15) . 92 Figure B.1 Examples of methods of measuring creepage distances and clearances . 98 Figure D.1 Overcurrent co-ordina

48、tion between a circuit-breaker and a fuse or back- up protection by a fuse Operating characteristics . 110 Figure D.2 Total selectivity between two circuit-breakers . 110 Figure D.3 Back-up protection by a circuit-breaker Operating characteristics . 111 Figure F.1 Examples of pillar terminals 113 Fi

49、gure F.2 Examples of screw terminals and stud terminals . 114 Figure F.3 Examples of saddle terminals 115 Figure F.4 Examples of lug terminals . 115 Figure H.1 Test arrangement . 118 Figure H.2 Grid circuit 118 Figure H.3 Grid circuit 119 Figure J.1 Connecting samples 126 Figure J.2 Examples of screwless-type terminals . 128 Figure K.1 Example of position of the thermocouple for measurement of the temperature-rise . 133 Figure K.2 Dimensions of male tabs . 134 Figur