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IEC 61009-1 Ed. 4.0 en:2024 Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1: General rules, 2024
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Classification [Go to Page]
- 4.1 According to the supply conditions [Go to Page]
- 4.1.1 RCBO operating correctly on the occurrence of residual current
- 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 Ue and 85 V
- 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
- 4.1.4 RCBO with 3 current paths operating correctly on the occurrence of residual current within the voltage range of 1,1 Ue and 0,7 Ue
- 4.1.5 RCBO operating correctly on the occurrence of residual current within the voltage range 1,1 Ue and Ux
- 4.1.6 RCBO according to 4.1.5, however reclosing automatically after restoration of the supply voltage
- 4.2 According to the possibility of adjusting the residual operating current
- 4.3 According to their operation in response to the type of residual current
- 4.4 According to time-delay (in the presence of a residual current)
- 4.5 According to the protection against external influences
- 4.6 According to the method of mounting
- 4.7 According to the method of connection
- 4.8 According to the type of terminals
- 4.9 According to the number of poles and current paths
- 4.10 According to the instantaneous tripping current
- 4.11 According to the I2t characteristics
- 5 Characteristics of RCBOs [Go to Page]
- 5.1 Summary of characteristics
- 5.2 Rated quantities and other characteristics [Go to Page]
- 5.2.1 Rated voltages
- 5.2.2 Rated current (In)
- 5.2.3 Rated frequency
- 5.2.4 Rated short-circuit capacity (Icn)
- 5.2.5 Rated residual operating current (IΔn)
- 5.2.6 Rated residual non-operating current (IΔno)
- 5.2.7 Rated residual making and breaking capacity (IΔm)
- 5.2.8 Void
- 5.2.9 Void
- 5.2.10 Operating characteristics in response to the type of residual current
- 5.2.11 RCBO type S
- 5.3 Standard and preferred values [Go to Page]
- 5.3.1 Standard values of rated operational voltage (Ue)
- 5.3.2 Preferred values of rated current (In)
- 5.3.3 Standard values of rated residual operating current (IΔn)
- 5.3.4 Standard value of residual non-operating current (IΔno)
- 5.3.5 Preferred values of rated frequency
- 5.3.6 Standard values of rated impulse withstand voltage (Uimp)
- 5.3.7 Standard limit values of break time and non-actuating time for RCBO of type AC and A
- 5.3.8 Void
- 5.3.9 Void
- 5.3.10 Void
- 5.3.11 Minimum value of the rated residual making and breaking capacity (IΔm)
- 5.3.12 Void
- 5.3.13 Void
- 5.3.14 Values of rated short-circuit capacity
- 5.3.15 Standard ranges of overcurrent instantaneous tripping
- 6 Marking and other product information
- 7 Standard conditions for operation in service and for installation [Go to Page]
- 7.1 Standard conditions
- 7.2 Conditions of installation
- 7.3 Pollution degree
- 8 Requirements for construction and operation [Go to Page]
- 8.1 Mechanical design [Go to Page]
- 8.1.1 General
- 8.1.2 Mechanism
- 8.1.3 Clearances, creepage distances and solid insulation
- 8.1.4 Screws, currentcarrying parts and connections
- 8.1.5 Terminals for external conductors
- 8.1.6 Non-interchangeability
- 8.2 Protection against electric shock
- 8.3 Dielectric properties and isolating capability
- 8.4 Temperature-rise [Go to Page]
- 8.4.1 General
- 8.4.2 Temperature-rise limits
- 8.4.3 Ambient air temperature
- 8.5 Operating characteristics [Go to Page]
- 8.5.1 General
- 8.5.2 Operation in response to the type of residual current
- 8.5.3 Operation in presence of a residual current equal to or greater than IΔn
- 8.5.4 Operation under overcurrent conditions
- 8.6 Mechanical and electrical endurance
- 8.7 Performance at short-circuit currents
- 8.8 Resistance to mechanical shock and impact
- 8.9 Resistance to heat
- 8.10 Resistance to abnormal heat and to fire
- 8.11 Test device
- 8.12 Void
- 8.13 Void
- 8.14 Behaviour of RCBOs in the event of current surges caused by impulse voltages
- 8.15 Reliability
- 8.16 Electromagnetic compatibility (EMC)
- 8.17 Resistance to temporary overvoltages (TOV)
- 9 Tests [Go to Page]
- 9.1 General
- 9.2 Test conditions
- 9.3 Test of indelibility of marking
- 9.4 Test of reliability of screws, current-carrying parts and connections
- 9.5 Test of reliability of screw-type terminals for external copper conductors
- 9.6 Verification of protection against electric shock
- 9.7 Test of dielectric properties [Go to Page]
- 9.7.1 Resistance to humidity
- 9.7.2 Insulation resistance of the main circuit
- 9.7.3 Dielectric strength of the main circuit
- 9.7.4 Insulation resistance and dielectric strength of auxiliary circuits
- 9.7.5 Secondary circuit of detection transformers
- 9.7.6 Capability of control circuits connected to the main circuit to withstand high DC voltages due to insulation measurements
- 9.7.7 Verification of impulse withstand voltages
- 9.8 Test of temperature-rise [Go to Page]
- 9.8.1 Ambient air temperature
- 9.8.2 Test procedure
- 9.8.3 Measurement of the temperature of parts
- 9.8.4 Temperature-rise of a part
- 9.9 Verification of the operating characteristics [Go to Page]
- 9.9.1 Verification of the operating characteristics under residual current conditions
- 9.9.2 Verification of the operating characteristic under overcurrent conditions
- 9.10 Verification of mechanical and electrical endurance [Go to Page]
- 9.10.1 General test conditions
- 9.10.2 Test procedure
- 9.10.3 Condition of the RCBO after test
- 9.11 Short-circuit tests [Go to Page]
- 9.11.1 General conditions for test
- 9.11.2 Test circuit for short-circuit performance
- 9.11.3 Values of test quantities
- 9.11.4 Tolerances on test quantities
- 9.11.5 Power factor of the test circuit
- 9.11.6 Measurement and verification of I2t and of the peak current (Ip)
- 9.11.7 Calibration of the test circuit
- 9.11.8 Interpretation of records
- 9.11.9 Condition of the RCBO for test
- 9.11.10 Behaviour of the RCBO during shortcircuit tests
- 9.11.11 Test procedure
- 9.11.12 Verification of the RCBO after short-circuit test
- 9.11.13 Verification of the rated residual making and breaking capacity (IΔm)
- 9.12 Verification of resistance to mechanical shock and impact [Go to Page]
- 9.12.1 Mechanical shock
- 9.12.2 Mechanical impact
- 9.13 Test of resistance to heat [Go to Page]
- 9.13.1 Test on complete RCBOs
- 9.13.2 Ball pressure test
- 9.14 Test of resistance to abnormal heat and to fire
- 9.15 Verification of the trip-free mechanism
- 9.16 Verification of the operation of the test device at the limits of rated operational voltage
- 9.17 Void
- 9.18 Void
- 9.19 Verification of the behaviour of RCBOs in the event of current surges caused by impulse voltages [Go to Page]
- 9.19.1 Current surge test for all RCBOs (0,5 µs/100 kHz ring wave test)
- 9.19.2 Verification of the behaviour at surge currents up to 3 000 A (8/20 µs surge current test)
- 9.20 Verification of reliability [Go to Page]
- 9.20.1 Climatic test
- 9.20.2 Test with temperature of 40 °C
- 9.21 Verification of withstand against ageing
- 9.22 Electromagnetic compatibility (EMC)
- 9.23 Test of resistance to rusting
- 9.24 Verification of the behaviour of the RCBO under temporary overvoltage (TOV) conditions [Go to Page]
- 9.24.1 General
- 9.24.2 TOV test for all RCBOs
- 9.24.3 Additional tests for RCBOs with a terminal intended to be connected to the PE
- 9.24.4 Verification after the tests
- Annex A (normative) Test sequence and number of samples to be submitted for certification purposes
- Annex B (normative) Determination of clearances and creepage distances [Go to Page]
- B.1 General
- B.2 Creepage distances where more than one material is used
- B.3 Creepage distances split by floating conductive part
- B.4 Measurement of creepage distances and clearances
- Annex C (normative) Arrangement for the detection of the emission of ionized gases during short-circuit tests
- Annex D (normative) Routine tests [Go to Page]
- D.1 General
- D.2 Tripping test
- D.3 Dielectric strength test
- D.4 Performance of the test device
- Annex E (informative) Methods for determination of short-circuit power-factor [Go to Page]
- E.1 General
- E.2 Method I – Determination from DC components
- E.3 Method II – Determination with pilot generator
- Annex F (informative) Co-ordination under short-circuit conditions between an RCBO and another short-circuit protective device (SCPD) associated in the same circuit [Go to Page]
- F.1 General
- F.2 Overview
- F.3 General requirements for the co-ordination of an RCBO with another SCPD [Go to Page]
- F.3.1 General consideration
- F.3.2 Take-over current
- F.3.3 Behaviour of C1 in association with another SCPD
- F.4 Type and characteristics of the associated SCPD
- F.5 Verification of selectivity
- F.6 Verification of back-up protection [Go to Page]
- F.6.1 Determination of the take-over current
- F.6.2 Verification of back-up protection
- F.6.3 Tests for verification of back-up protection
- F.6.4 Results to be obtained
- Annex G (normative) Additional requirements and tests for RCBOs consisting of a circuit-breaker and a residual current unit designed for assembly on site [Go to Page]
- G.1 General
- G.2 Marking and other product information [Go to Page]
- G.2.1 Manufacturer's name or trade mark
- G.2.2 Marking
- G.2.3 Instructions for assembly and operation
- G.3 Constructional requirements [Go to Page]
- G.3.1 General
- G.3.2 Degree of protection
- G.3.3 Mechanical requirements
- G.3.4 Electrical compatibility
- G.4 Type tests and verifications [Go to Page]
- G.4.1 Tests on circuit-breakers
- G.4.2 Tests on RC units
- G.4.3 Tests on assembled circuit-breaker and RC unit (RCBO)
- G.4.4 Verification of marking and constructional requirements of RCBOs
- G.5 Routine tests on the RC unit
- Annex H (informative) Examples of terminal designs
- Annex I (informative) Correspondence between ISO and AWG copper conductors
- Annex J (informative) Follow-up testing program for RCBOs [Go to Page]
- J.1 General
- J.2 Follow-up testing program [Go to Page]
- J.2.1 General
- J.2.2 Quarterly follow-up testing program
- J.2.3 Annual follow-up testing program
- J.2.4 Sampling procedure
- Bibliography
- Figures [Go to Page]
- Figure 1 – Standard test finger
- Figure 2 – Void
- Figure 3 – Void
- Figure 4 – Void
- Figure 5 – Typical diagram for all short circuit tests except for the verification of the suitability in IT systems
- Figure 6 – Typical diagram for the verification of the suitability in IT systems
- Figure 7 – Detail of impedances Z, Z1 and Z2
- Figure 8 – Mechanical shock test apparatus
- Figure 9 – Mechanical impact test apparatus
- Figure 10 – Striking element for pendulum impact test apparatus
- Figure 11 – Mounting support for sample for mechanical impact test
- Figure 12 – Example of mounting an unenclosed or flush-type RCBO for mechanical impact test
- Figure 13 – Example of mounting of panel mounting type RCBO for the mechanical impact test
- Figure 14 – Application of force for mechanical test of rail mounted RCBO
- Figure 15 – Ball-pressure test apparatus
- Figure 16 – Current ring wave 0,5 µs/100 kHz
- Figure 17 – Test circuit for the ring wave test on RCBOs
- Figure 18 – Surge current impulse 8/20 µs
- Figure 19 – Test circuit for the surge current test of RCBOs
- Figure 20 – Stabilizing period for reliability test
- Figure 21 – Reliability test cycle
- Figure 22 – Void
- Figure 23 – Example of records for short-circuit tests
- Figure 24 – Test circuit for the verification of the behaviour under temporary over voltage (TOV) conditions for RCBOs with a terminal intended to be connected to the PE
- Figure 25 – Void
- Figure 26 – Void
- Figure 27 – Diagrammatic representation for glow-wire test
- Figure B.1 – Measuring creepage distances and clearances: Example 1
- Figure B.2 – Measuring creepage distances and clearances: Example 2
- Figure B.3 – Measuring creepage distances and clearances: Example 3
- Figure B.4 – Measuring creepage distances and clearances: Example 4
- Figure B.5 – Measuring creepage distances and clearances: Example 5
- Figure B.6 – Measuring creepage distances and clearances: Example 6
- Figure B.7 – Measuring creepage distances and clearances: Example 7
- Figure B.8 – Measuring creepage distances and clearances: Example 8
- Figure B.9 – Measuring creepage distances and clearances: Example 9
- Figure B.10 – Measuring creepage distances and clearances: Example 10
- Figure B.11 – Measuring creepage distances and clearances: Example 11
- Figure C.1 – Example of test arrangement
- Figure C.2 – Grid
- Figure C.3 – Grid circuit
- Figure F.1 – Overcurrent co-ordination between an RCBO and a fuse or back-up protection by a fuse – Operating characteristics
- Figure F.2 – Total selectivity
- Figure F.3 – Back-up protection – Operating characteristics
- Figure H.1 – Examples of pillar terminals
- Figure H.2 – Examples of screw terminals and stud terminals
- Figure H.3 – Examples of saddle terminals
- Figure H.4 – Examples of lug terminals
- Tables [Go to Page]
- Table 1 – Marking
- Table 2 – Void
- Table 3 – Void
- Table 4 – Void
- Table 5 – Void
- Table 6 – Void
- Table 7 – Void
- Table 8 – Void
- Table 9 – Void
- Table 10 – Void
- Table 11 – Standard limit values of break time and non-actuating time for alternating residual currents (RMS values) for type AC and A
- Table 12 – Standard maximum values of break time for half-wave residual currents (RMS values) for type A
- Table 13 – Void
- Table 14 – Tripping current limits
- Table 15 – Void
- Table 16 – Void
- Table 17 – Void
- Table 18 – Void
- Table 19 – Rated impulse withstand voltage as a function of the nominal voltage of the installation
- Table 20 – Minimum clearances and creepage distances
- Table 21 – Test voltage of auxiliary circuits
- Table 22 – Test voltage for verification of rated impulse withstand voltage
- Table 23 – Test voltage for verifying the suitability for isolation, with reference to the rated impulse withstand voltage of the RCBO and the altitude where the test is carried out
- Table 24 – Connectable cross-sections of copper conductors for screw-type terminals
- Table 25 – Test copper conductors corresponding to the rated currents
- Table 26 – Screw thread diameters and applied torques
- Table 27 – Pulling forces
- Table 28 – Temperature-rise values
- Table 29 – Power factor ranges of the test circuit
- Table 30 – Withstand values and duration of temporary overvoltages
- Table 31 – Void
- Table 32 – Void
- Table 33 – Void
- Table 34 – Void
- Table 35 – Void
- Table 36 – Void
- Table 37 – Standard values of rated short circuit capacity
- Table 38 – Ranges of overcurrent instantaneous tripping
- Table 39 – Time-current operating characteristics
- Table 40 – List of short-circuit tests
- Table 41 – Ratio between service short-circuit capacity (Ics) and rated short-circuit capacity (Icn) – (factor k)
- Table 42 – Test procedure for Ics in the case of single- and two-pole RCBOs
- Table 43 – Test procedure for Ics in the case of three- and four-pole RCBOs
- Table 44 – Test procedure for Icn
- Table 45 – Void
- Table 46 – Standard values of rated operational voltage
- Table 47 – Values of influencing quantities
- Table J.1 – Test sequences during follow-up inspections
- Table J.2 – Number of samples to be tested [Go to Page]
