IEC 61009-1:2024
(Main)Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules
IEC 61009-1:2024 gives general requirements and tests for residual current operated circuit‑breakers with integral overcurrent protection for household and similar uses (hereafter referred to as RCBOs), for rated operational voltages not exceeding 440 V AC, with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents not exceeding 125 A and rated short‑circuit capacities not exceeding 25 000 A.
This fourth edition cancels and replaces the third edition published in 2010, Amendment 1:2012 and Amendment 2:2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) harmonization of all clauses between the IEC 61008, IEC 61009 and IEC 60755 series using blocks and modules approach;
b) harmonization of all tables and figures between the IEC 61008, IEC 61009 and IEC 60755 series;
c) terms and definitions are now referred to IEC 62873-2;
d) modification of Subclause 4.1 for classification according to supply conditions;
e) new Subclauses 8.17 and 9.24 for requirements and tests for the resistance to temporary overvoltages (TOV);
f) improvement of Subclause 9.7 for test of dielectric properties;
g) tests for screwless, flat-quick terminals and aluminium conductors are now referred to in the IEC 62873-3 series.
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de protection contre les surintensités incorporé pour usages domestiques et analogues (DD) - Partie 1: Règles générales
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IEC 61009-1 ®
Edition 4.0 2024-11
INTERNATIONAL
STANDARD
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
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IEC 61009-1 ®
Edition 4.0 2024-11
INTERNATIONAL
STANDARD
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8327-0011-2
– 2 – IEC 61009-1:2024 © IEC 2024
CONTENTS
FOREWORD . 10
INTRODUCTION . 12
1 Scope . 13
2 Normative references . 15
3 Terms and definitions . 16
4 Classification . 16
4.1 According to the supply conditions . 16
4.1.1 RCBO operating correctly on the occurrence of residual current . 16
4.1.2 RCBO with 2 or 4 current paths operating correctly on the occurrence of
residual current within the voltage range of 1,1 U and 85 V . 17
e
4.1.3 RCBO according to 4.1.2 fitted with a functional earth (FE) and able to
continue to provide protection when supplied from just one phase and
FE . 17
4.1.4 RCBO with 3 current paths operating correctly on the occurrence of
residual current within the voltage range of 1,1 U and 0,7 U . 17
e e
4.1.5 RCBO operating correctly on the occurrence of residual current within
the voltage range 1,1 U and U . 17
e x
4.1.6 RCBO according to 4.1.5, however reclosing automatically after
restoration of the supply voltage . 17
4.2 According to the possibility of adjusting the residual operating current . 17
4.3 According to their operation in response to the type of residual current . 17
4.4 According to time-delay (in the presence of a residual current) . 18
4.5 According to the protection against external influences . 18
4.6 According to the method of mounting . 18
4.7 According to the method of connection . 18
4.8 According to the type of terminals . 18
4.9 According to the number of poles and current paths . 18
4.10 According to the instantaneous tripping current . 19
4.11 According to the I t characteristics . 19
5 Characteristics of RCBOs . 19
5.1 Summary of characteristics . 19
5.2 Rated quantities and other characteristics . 20
5.2.1 Rated voltages . 20
5.2.2 Rated current (I ) . 20
n
5.2.3 Rated frequency . 20
5.2.4 Rated short-circuit capacity (I ) . 20
cn
5.2.5 Rated residual operating current (I ) . 20
Δn
5.2.6 Rated residual non-operating current (I ) . 21
Δno
5.2.7 Rated residual making and breaking capacity (I ) . 21
Δm
5.2.8 Void . 21
5.2.9 Void . 21
5.2.10 Operating characteristics in response to the type of residual current . 21
5.2.11 RCBO type S . 21
5.3 Standard and preferred values . 21
5.3.1 Standard values of rated operational voltage (U ) . 21
e
5.3.2 Preferred values of rated current (I ) . 21
n
5.3.3 Standard values of rated residual operating current (I ) . 21
Δn
5.3.4 Standard value of residual non-operating current (I ) . 22
Δno
5.3.5 Preferred values of rated frequency . 22
5.3.6 Standard values of rated impulse withstand voltage (U ) . 22
imp
5.3.7 Standard limit values of break time and non-actuating time for RCBO of
type AC and A . 22
5.3.8 Void . 22
5.3.9 Void . 22
5.3.10 Void . 22
5.3.11 Minimum value of the rated residual making and breaking capacity
(I ) . 22
Δm
5.3.12 Void . 22
5.3.13 Void . 22
5.3.14 Values of rated short-circuit capacity . 22
5.3.15 Standard ranges of overcurrent instantaneous tripping . 23
6 Marking and other product information . 23
7 Standard conditions for operation in service and for installation . 24
7.1 Standard conditions . 24
7.2 Conditions of installation . 24
7.3 Pollution degree . 24
8 Requirements for construction and operation . 24
8.1 Mechanical design . 24
8.1.1 General . 24
8.1.2 Mechanism . 25
8.1.3 Clearances, creepage distances and solid insulation . 26
8.1.4 Screws, current-carrying parts and connections . 27
8.1.5 Terminals for external conductors . 28
8.1.6 Non-interchangeability . 30
8.2 Protection against electric shock . 30
8.3 Dielectric properties and isolating capability . 31
8.4 Temperature-rise . 31
8.4.1 General . 31
8.4.2 Temperature-rise limits . 31
8.4.3 Ambient air temperature . 31
8.5 Operating characteristics . 31
8.5.1 General . 31
8.5.2 Operation in response to the type of residual current . 31
8.5.3 Operation in presence of a residual current equal to or greater than I . 32
Δn
8.5.4 Operation under overcurrent conditions . 32
8.6 Mechanical and electrical endurance . 33
8.7 Performance at short-circuit currents . 33
8.8 Resistance to mechanical shock and impact . 33
8.9 Resistance to heat . 33
8.10 Resistance to abnormal heat and to fire . 34
8.11 Test device . 34
8.12 Void . 34
8.13 Void . 34
– 4 – IEC 61009-1:2024 © IEC 2024
8.14 Behaviour of RCBOs in the event of current surges caused by impulse
voltages . 34
8.15 Reliability . 35
8.16 Electromagnetic compatibility (EMC) . 35
8.17 Resistance to temporary overvoltages (TOV) . 35
9 Tests . 35
9.1 General . 35
9.2 Test conditions .
...
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