IEC TS 63053:2017

IEC TS 63053 ®
Edition 1.0 2017-06
TECHNICAL
SPECIFICATION
General requirements for residual current operated protective devices
for DC systems
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IEC TS 63053 ®
Edition 1.0 2017-06
TECHNICAL
SPECIFICATION
General requirements for residual current operated protective devices

for DC systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-4526-2

– 2 – IEC TS 63053:2017 © IEC 2017
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 Classification . 11
4.1 According to the type of installation . 11
4.2 According to the possibility of adjusting the residual operating current . 11
4.3 According to time-delay (in presence of a residual current) . 11
4.4 According to the protection against external influences . 12
4.5 According to the method of mounting . 12
4.6 According to the method of connection . 12
4.7 According to the type of terminals . 12
4.8 According to the number of poles and current paths . 12
4.9 According to the instantaneous tripping current . 13
4.10 According to the I²t characteristics . 13
4.11 According to overcurrent protection . 13
4.12 According to the method of construction . 13
4.13 According to the range of ambient air temperature . 13
4.14 According to the time constant . 13
4.15 According to the current direction through the poles. 13
5 Characteristics of residual current devices . 14
5.1 Summary of characteristics . 14
5.2 Rated quantities and other characteristics . 14
5.2.1 Rated voltages . 14
5.2.2 Rated direct current (I ) . 14
n
5.2.3 Rated making and breaking capacity (I ) . 14
m
5.2.4 Rated residual operating direct current (I ) . 15
∆n
5.2.5 Rated residual non-operating direct current (I ) . 15
∆no
5.2.6 Rated residual direct making and breaking capacity (I ) . 15
∆m
5.2.7 Rated conditional direct short-circuit current (I ) . 15
nc
5.2.8 Rated conditional residual direct short-circuit current (I ) . 15
∆c
5.2.9 Time-delay DC-RCD . 15
5.2.10 Operating characteristics . 15
5.3 Standard and preferred values . 15
5.3.1 Preferred values of rated operational voltage (U ) . 15
e
5.3.2 Preferred values of rated current (I ) . 16
n
5.3.3 Standard values of rated residual operating direct current (I ) . 16
∆n
5.3.4 Standard value of residual non-operating direct current (I ) . 16
∆no
5.3.5 Standard values of rated impulse withstand voltage (U ) . 16
imp
5.3.6 Standard values of operating time . 17
5.3.7 Minimum value of the rated making and breaking capacity (I ) . 18
m
5.3.8 Minimum value of the rated residual direct making and breaking
capacity (I ) . 18
∆m
5.4 Coordination with short-circuit protective devices (SCPDs) . 18
5.4.1 General . 18
5.4.2 Preferred values of the rated conditional direct short-circuit current (I ). 18
nc
5.4.3 Preferred values of the rated conditional residual direct short-circuit
current (I ) . 18
∆c
6 Marking and other product information . 19
7 Conditions for operation in service and for installation . 20
7.1 Preferred ranges of application, reference values of influencing
quantities/factors and associated test tolerances . 20
7.2 Conditions of installation . 21
7.3 Pollution degree . 21
8 Requirements for construction and operation . 21
8.1 Mechanical design . 21
8.1.1 General . 21
8.1.2 Mechanism . 22
8.1.3 Clearance and creepage distances . 23
8.1.4 Screws, current-carrying parts and connections . 23
8.1.5 Terminals for external conductors . 24
8.2 Protection against electric shock . 24
8.3 Dielectric properties and isolating capability . 24
8.4 Temperature-rise . 24
8.5 Operating characteristics . 25
8.5.1 General . 25
8.5.2 Operation in response to a residual current equal to and greater than
I . 25
∆n
8.5.3 Operation in response time in presence of a residual current equal to
and greater than I . 25
∆n
8.6 Mechanical and electrical endurance . 25
8.7 Performance at short-circuit currents . 25
8.8 Resistance to mechanical shock and impact . 26
8.9 Resistance to heat . 26
8.10 Resistance to abnormal heat and to fire . 26
8.11 Test device . 26
8.12 Requirements for DC-RCDs in case of loss of supply . 26
8.13 Behaviour of DC-RCDs in case of overcurrent in the main circuit . 27
8.14 Behaviour of DC-RCDs in the case of current surges caused by impulse
voltages . 27
8.15 Void . 27
8.16 Reliability . 27
8.17 Electromagnetic compatibility (EMC) . 27
8.18 Resistance to temporary overvoltages (TOVs) . 27
8.19 Performance of DC-RCDs at inrush currents . 28
9 Preparation of test clauses for DC-RCDs product standard . 28
9.1 General . 28
9.1.1 General test conditions . 28
9.1.2 Test clauses not specified in this document . 28
9.2 Operating characteristics . 29
9.2.1 General requirements for operating characteristics tests . 29
9.2.2 Steady increase of residual current . 29
9.2.3 Closing on a residual current . 29
9.2.4 Sudden appearance of residual current . 29
9.2.5 Residual current higher than 3 I . 29
∆n
– 4 – IEC TS 63053:2017 © IEC 2017
9.2.6 Tests with load . 29
9.2.7 Tests at the temperature limits . 29
9.2.8 Additional test for delay type RCDs . 30
9.3 Tests of electrical endurance .
...