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IEC 62962
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Particular requirements for load-shedding equipment (LSE)
Exigences spécifiques pour les délesteurs (LSE)
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IEC 62962
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Particular requirements for load-shedding equipment (LSE)
Exigences spécifiques pour les délesteurs (LSE)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.015; 29.020 ISBN 978-2-8322-7385-2
– 2 – IEC 62962:2019 IEC 2019
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 13
3 Terms and definitions . 14
4 General requirements . 22
4.1 General . 22
4.2 Architecture . 23
4.3 Standard conditions for operation in service . 24
5 General remarks on tests . 25
5.1 Environmental conditions . 25
5.1.1 General . 25
5.1.2 Ambient temperature range in normal use. 25
5.1.3 Relative humidity . 25
5.1.4 Altitude . 25
5.2 General testing procedure and samples . 26
6 Ratings . 27
6.1 Rated values . 27
6.1.1 Rated operational voltages . 27
6.1.2 Rated insulation voltage . 27
6.1.3 Rated impulse voltage . 27
6.1.4 Maximum value of rated current . 27
6.1.5 Preferred rated current values (I ) . 27
n
6.1.6 Minimum value of rated making and breaking capacity (I ) . 28
RMS
6.1.7 Rated frequency . 28
6.1.8 Rated conditional short-circuit current . 28
6.1.9 Preferred rated load-shedding current (power) values (I L , P L ) . 28
n s n s
6.2 Time-current characteristic for LSEs monitoring the current . 28
6.2.1 LSE operating principle . 28
6.2.2 Current limits (I L ) . 30
n s
6.2.3 Minimum switch OFF-time . 30
6.2.4 Reclosing conditions . 31
6.3 Time-power characteristic . 32
6.4 LSE shedding sequence . 32
7 Classification . 33
7.1 General . 33
7.2 According to the LSE functional category . 33
7.3 According to the switching means . 34
7.4 According to the possibility of adjusting the rated load-shedding current(s)
(or power) . 34
7.5 According to the shedding sequence . 34
7.6 According to the design . 34
7.6.1 Stand-alone LSE with internal or external sensors or measuring units . 34
7.6.2 LSE with external sensor . 34
7.6.3 Combined LSE (or assembled LSE) . 34
7.7 According to the method of mounting . 34
7.8 According to the type of terminals . 34
7.9 According to the contact openings . 34
7.10 According to the protection against external influences . 35
7.11 According to the number of poles . 35
7.12 According to the type of monitored parameters . 35
8 Markings and information . 35
8.1 General . 35
8.2 Test of markings . 36
9 Protection against electric shock . 36
9.1 General . 36
9.2 Test for protection against electric shock . 37
10 Terminals for external copper conductors . 40
10.1 General . 40
10.2 Terminals with screw clamping for external copper conductors . 40
10.2.1 General . 40
10.2.2 Conductor fitting . 46
10.2.3 Mechanical strength of terminals . 46
10.2.4 Resistance to corrosion of terminals . 46
10.2.5 Clamping effects on conductors . 46
10.2.6 Clamping reliability of terminals . 47
10.2.7 Clamping length of terminals . 48
10.2.8 Reliability of terminals . 49
10.2.9 Accidental loosening of earthing terminals . 49
10.2.10 Resistance to corrosion of earthing terminals . 49
10.2.11 Additional requirements for the design of pillar terminals . 50
10.2.12 Additional requirements for the design of lug terminals . 50
10.2.13 Additional requirements for terminals for the connection of external
conductors . 50
10.3 Screwless terminals for external copper conductors . 50
10.3.1 General .
...