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IEC 60077-5
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Electric equipment for rolling stock –
Part 5: Electrotechnical components – Rules for HV fuses
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IEC 60077-5
Edition 2.0 2019-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Electric equipment for rolling stock –
Part 5: Electrotechnical components – Rules for HV fuses
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060.01 ISBN 978-2-8322-7581-8
– 2 – IEC 60077-5:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Components . 7
3.2 Operational characteristics . 8
3.3 Abbreviated terms . 10
4 Classification . 11
4.1 Breaking range (see also Annex B) . 11
4.2 Utilisation category . 11
5 Characteristics . 11
6 Product information . 12
6.1 Documentation . 12
6.2 Marking . 12
7 Normal service conditions . 12
8 Constructional and performance requirements . 13
8.1 Constructional requirements . 13
8.1.1 General . 13
8.1.2 Fuse-link . 13
8.1.3 Fuse-base . 13
8.1.4 Spring-loaded contacts . 13
8.1.5 External terminals . 13
8.2 Performance requirements . 13
8.2.1 Operating conditions . 13
8.2.2 Temperature-rise limits . 14
8.2.3 Dielectric properties . 14
8.2.4 Rated voltage . 14
8.2.5 Rated current of the fuse-link . 14
8.2.6 Rated current of the fuse-base . 14
8.2.7 Breaking capacity . 14
8.2.8 Time-current characteristics . 15
9 Tests . 15
9.1 Kinds of tests . 15
9.1.1 General . 15
9.1.2 Type tests . 15
9.1.3 Routine tests . 15
9.1.4 Investigatory Investigation tests . 15
9.2 Tests for the verification of constructional requirements . 16
9.2.1 General . 16
9.2.2 Type tests . 16
9.2.3 Routine tests . 16
9.3 Type tests for the verification of performance requirements . 16
9.3.1 Test sequence . 16
9.3.2 General test conditions . 18
9.3.3 Test sequence for the verification of general performance
characteristics . 19
9.3.4 Description of tests for the fuse-link . 19
9.4 Routine tests for the verification of performance requirements . 23
9.4.1 General . 23
9.4.2 Resistance measurement . 24
Annex A (normative) Connection diagram for temperature rise tests . 25
Annex B (informative) Comparison between “a” and “g” fuse time current
characteristics . 26
Annex C (informative) Diagram of the test circuit for breaking capacity tests . 27
Annex D (informative) Verification of breaking capacity . 28
Bibliography . 30
Figure A.1 – Connection diagram for temperature rise tests . 25
Figure B.1 – Comparison between “a” and “g” fuse time current characteristics . 26
Figure C.1 – Diagram of the test circuit for breaking capacity tests . 27
Figure D.1 – Test circuit calibration . 28
Figure D.2 – Breaking operation when the instant of arc initiation is after the peak
value of the current . 29
Figure D.3 – Breaking operation when the instant of arc initiation is prior to the peak
value of the current . 29
Table 1 – Conventional times for “g” fuse-links . 12
Table 2 – Rated and test voltages for DC fuse-links supplied from the contact line . 14
Table 3 – Sequence of tests for the highest rating of a homogeneous series . 17
Table 4 – Sequence of tests for the lowest rating of a homogeneous series . 18
Table 5 – Sequence of tests for the intermediate ratings of a homogeneous series . 18
Table 6 – Tolerances on test values . 19
Table 7 – Parameters for breaking capacity tests of DC fuse-links . 21
Table 8 – Time constant of the test circuit . 22
– 4 – IEC 60077-5:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTRIC EQUIPMENT FOR ROLLING STOCK –
Part 5: Electrotechnical components –
Rules for HV fuses
FOREWORD
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