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IEC 60077-3
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway Applications – Electric equipment for rolling stock –
Part 3: Electrotechnical components – Rules for DC circuit-breakers
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IEC 60077-3
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway Applications – Electric equipment for rolling stock –
Part 3: Electrotechnical components – Rules for DC circuit-breakers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060.01 ISBN 978-2-8322-7565-8
– 2 – IEC 60077-3:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Components . 8
3.2 Component parts . 8
3.3 Operational features . 10
3.4 Breaking characteristics . 10
3.5 Abbreviated terms . 13
4 Classification . 13
5 Characteristics . 13
5.1 List of characteristics . 13
5.2 Type of circuit-breaker . 13
5.3 Rated values and limiting values for the main circuit . 13
5.3.1 General . 13
5.3.2 Rated voltages . 14
5.3.3 Rated currents . 14
5.3.4 Rated time constants . 14
5.3.5 Short-circuit characteristics (see also annex B) Rated short-circuit
making and breaking capacity . 15
5.4 Operational frequencies . 15
5.5 Electric and pneumatic control circuits . 15
5.6 Electric and pneumatic auxiliary circuits . 15
5.7 Overcurrent release . 15
5.8 Peak arc voltages . 16
6 Product information . 16
6.1 Component documentation . 16
6.2 Marking . 16
7 Normal service conditions . 16
8 Constructional and performance requirements . 16
8.1 Constructional requirements . 16
8.2 Performance requirements . 16
8.2.1 Operating conditions . 16
8.2.2 Temperature rise limits . 16
8.2.3 Operation following inactivity . 16
8.2.4 Electromagnetic compatibility (EMC) . 16
8.2.5 Acoustic noise emission . 16
8.2.6 Dielectric properties Clearances . 17
8.2.7 Creepage distances . 17
8.2.8 Switching overvoltages . 17
8.2.9 Operational performance capability . 17
8.2.10 Ability to withstand vibration and shock . 18
8.2.11 Ability to make and break under short-circuit conditions . 18
9 Tests . 19
9.1 Kinds of tests . 19
9.1.1 General . 19
9.1.2 Type tests . 19
9.1.3 Routine tests . 19
9.1.4 Investigatory Investigation tests . 19
9.2 Verification of constructional requirements . 19
9.2.1 General . 19
9.2.2 Type tests . 19
9.2.3 Routine tests . 20
9.3 Type tests for verification of performance requirements . 20
9.3.1 Test sequences . 20
9.3.2 General test conditions . 21
9.3.3 Test sequence I: General performance characteristics . 22
9.3.4 Test sequence II: Rated short-circuit making and breaking capacities . 23
9.3.5 Test sequence III: capability Ability to withstand vibration and shock . 25
9.3.6 Test sequence IV: Searching for critical currents . 26
9.3.7 Test sequence V: Climatic conditions . 26
9.3.8 Test sequence VI: Other tests. 26
9.4 Routine tests for verification of performance requirements . 27
9.4.1 General . 27
9.4.2 Mechanical operation Functional test . 27
9.4.3 Measurement of resistance . 27
9.4.4 Calibration of releases . 27
9.4.5 Air-tightness (for pneumatic circuit-breaker) . 27
9.4.6 Dielectric withstand . 27
Annex A (normative) Test circuit to verify the making and breaking capacities . 28
Annex B (informative) Verification of short-circuit making and breaking capacities . 29
Bibliography . 31
Figure A.1 – Diagram of the test circuit . 28
Figure B.1 – Calibration of the circuit to obtain the prospective peak making current . 29
Figure B.2 – Oscillogram corresponding to a break after the current has passed its
maximum value . 30
Figure B.3 – Oscillogram corresponding to a break before the current has reached its
maximum value (current-limiting circuit-breaker) . 30
Table 1 – Rated time constants . 14
Table 2 – Operational performance capability . 18
Table 3 – List of type test sequences for performance requirements . 20
Table 4 – Tolerances on test values . 21
– 4 – IEC 60077-3:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTRIC EQUIPMENT FOR ROLLING STOCK –
Part 3: Electrotechnical components –
Rules for DC circuit-breakers
FOREWORD
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...