prEN IEC 61009-1:2026/prAA:2026

SLOVENSKI STANDARD
01-februar-2026
Odklopniki na preostali (residualni) tok z vgrajeno nadtokovno zaščito za
gospodinjsko in podobno rabo (RCBO's) - 1. del: Splošna pravila
Residual current operated circuit-breakers with integral overcurrent protection for
household and similar uses (RCBOs) - Part 1: General rules
Fehlerstrom-/Differenzstrom-Schutzschalter mit eingebautem Überstromschutz (RCBOs)
für Hausinstallationen und für ähnliche Anwendungen - Teil 1: Allgemeine Anforderungen
Ta slovenski standard je istoveten z: prEN IEC 61009-1:2026/prAA:2026
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
oSIST prEN IEC 61009- en
1:2026/oprAA:2026
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 61009-1:2026
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
January 2026
ICS 29.120.50 -
English Version
Residual current operated circuit-breakers with integral
overcurrent protection for household and similar uses (RCBOs) -
Part 1: General rules
To be completed Fehlerstrom-/Differenzstrom-Schutzschalter mit
eingebautem Überstromschutz (RCBOs) für
Hausinstallationen und für ähnliche Anwendungen - Teil 1:
Allgemeine Anforderungen
This draft amendment prAA, if approved, will modify the European Standard prEN IEC 61009-1:2026; it is submitted to CENELEC members
for enquiry.
Deadline for CENELEC: 2026-04-24.
It has been drawn up by CLC/TC 23E.
If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
This draft amendment was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 82333 Ref. No. prEN IEC 61009-1:2026/prAA:2026 E

15 Contents Page
16 European foreword . 5
17 1 Modification to the Introduction . 6
18 2 Modifications to Clause 1, “Scope” . 6
19 3 Modification to Clause 2, “Normative references” . 6
20 4 Modifications to Clause 3, “Terms and definitions” . 6
21 5 Modification to 4.1.2, “RCBO with 2 or 4 current paths operating correctly on the
22 occurrence of residual current within the voltage range of 1,1 U and 85 V” . 6
e
23 6 Modification to 4.2, “According to the possibility of adjusting the residual operating
24 current” . 7
25 7 Deletion of 4.8.4, “RCBO with screw-type terminals for aluminium conductors” . 7
26 8 Modifications to 4.9, “According to the number of poles and current paths” . 7
27 9 Modification to 4.11, “According to the I t characteristic” . 7
28 10 Addition of 4.Z1, “According to the range of ambient air temperature” . 7
29 11 Modification to 5.1, “Summary of characteristics” . 7
30 12 Modification to 5.2.1.3, “Rated impulse withstand voltage (U )” . 7
imp
31 13 Modification to 5.2.5, “Rated residual operating current (I )” . 7
Δn
32 14 Modification to 5.3.3, “Standard values of rated residual operating current (I )” . 7
Δn
33 15 Modification to 5.3.6, “Standard values of rated impulse withstand voltage (U )” . 7
imp
34 16 Modifications to 5.3.7.1, “Standard limit values of break time and non-actuating time for
35 alternating residual currents (RMS values) of type AC and A” . 8
36 17 Modification to 5.3.11, “Minimum value of the rated residual making and breaking
37 capacity (I )” . 8
Δm
38 18 Modification to 5.3.14, “Values of rated short-circuit capacity” . 8
39 19 Addition of 5.3.Z1, “Standard ranges of ambient air temperature” . 8
40 20 Modification to Clause 6, “Marking and other product information” . 8
41 21 Modifications to 8.1.1, “General” . 9
42 22 Modification to 8.1.2, “Mechanism” . 9
43 23 Modification to 8.1.5, “Terminals for external conductors” . 9
44 24 Addition of 8.1.Z1, “Mechanical mounting of plug-in RCBOs” . 9
45 25 Addition of 8.5.4.Z1, “Effect of single-phase loading of multi-pole RCBO on the tripping
46 characteristic” . 9
47 26 Modifications to 8.11, “Test device” . 10
48 27 Addition of 8.Z1, “Behaviour of RCBOs at low ambient air temperatures” . 10
49 28 Modification to 9.1, “General” . 10
50 29 Modification to 9.2, “Test conditions” . 10
51 30 Modification to 9.4, “Test of reliability of screws, current-carrying parts and connections” . 10
52 31 Modification to 9.5, “Test of reliability of screw-type terminals for external copper
53 conductors” . 10
54 32 Modification to 9.7.7.2, “Verification of clearances with the impulse withstand voltage” . 10
55 33 Modification to 9.7.7.3, “Verification of resistance of the insulation of open contacts
56 against an impulse voltage (suitability for isolation)” . 10
57 34 Modification to 9.8.2, “Test procedure” . 11
58 35 Addition of 9.9.2.Z1, “Test of effect of single-phase loading on the over-current tripping
59 characteristic of RCBO with three or four current paths” . 11
60 36 Modification to 9.10.2, “Test procedure” . 11
61 37 Modification to 9.10.3, “Condition of the RCBO after test” . 11
62 38 Modification to 9.11.1, “General conditions for test” . 11
63 39 Modification to 9.11.2, “Test circuit for short-circuit performance” . 11
64 40 Modification to 9.11.3, “Values of test quantities” . 11
65 41 Modification to 9.11.4, “Tolerances on test quantities” . 12
66 42 Modification to 9.11.9.1, “General” . 12
67 43 Modification to 9.11.9.2, “Test in free air”. 12
68 44 Modification to 9.11.11.2.1 “Tests on all RCBOs” . 12
69 45 Modification to 9.11.11.2.2, “Short-circuit test on RCBOs for verifying their suitability for
70 use in IT systems” . 12
71 46 Modification to 9.11.11.3, “Test at 1 500 A” . 12
72 47 Modification to 9.11.11.4, “Test above 1 500 A” . 12
73 48 Modification to 9.11.12.2, “Verification of the RCBO after short-circuit test”. 13
74 49 Deletion of 9.11.13, “Verification of the rated residual making and breaking capacity (I )” . 13
Δm
75 50 Modification to 9.12.2.1, “General” . 13
76 51 Modification to 9.12.2.3, “Test for RCBOs intended to be mounted on a rail” . 14
77 52 Addition of 9.12.2.4, “Test for plug-in RCBOs” . 14
78 53 Modification to 9.13.1, “Test on complete RCBOs” . 14
79 54 Modification to 9.16, “Verification of the operation of the test device at the limits of rated
80 operational voltage” . 14
81 55 Modification to 9.20.1.3, “Test procedure” . 14
82 56 Modification to 9.20.1.5, “Final verification” . 14
83 57 Modifications to 9.20.2, “Test with temperature of 40 °C” . 15
84 58 Modifications to 9.21, “Verification of withstand against ageing” . 15
85 59 Modification to 9.24.3, “Additional tests for RCBOs with a terminal intended to be
86 connected to the PE” . 15
87 60 Modifications to Table 1, “Marking” . 15
88 61 Modifications to Table 11, “Standard limit values of break time and non-actuating time for
89 alternating residual currents (RMS values) for type AC and A” . 16
90 62 Modification to Table 19, “Rated impulse withstand voltage as a function of the nominal
91 voltage of the installation” . 16
92 63 Modifications to Table 23, “Test voltage for verifying the suitability for isolation, with
93 reference to the rated impulse withstand voltage of the RCBO and the altitude where the
94 test is carried out” . 16
95 64 Modifications to Table 37, “Standard values of rated short circuit capacity” . 16
96 65 Modifications to Table 38, “Ranges of overcurrent instantaneous tripping” . 16
97 66 Modifications to Table 39, “Time-current operating characteristics” . 16
98 67 Modification to Table 42, “Test procedure for I in the case of single- and two-pole
cs
99 RCBOs” . 17
100 68 Modification to Table 46, “Standard values of rated operational voltage” . 17
101 69 Modification to Table 47, “Values of influencing quantities” . 17
102 70 Modification to Figure 5, “Typical diagram for all short circuit tests except for the
103 verification of the suitability in IT systems” . 17
104 71 Addition of Figure Z5, “Example of application of force for mechanical test on two-pole
105 plug-in RCBO, the holding in position of which depends solely on the plug-in
106 connections (9.12.2.4)” . 17
107 72 Modification to Annex A, “Test sequence and number of samples to be submitted for
108 certification purposes” . 18
109 73 Modification to Annex C, “Arrangement for the detection of the emission of ionized gases
110 during short-circuit tests” . 18
111 74 Modification to Annex D, “Routine tests” . 18
112 75 Modification to Annex I, “Correspondence between ISO and AWG copper conductors” . 18
113 76 Addition of Annex ZA, “Normative references to international publications with their
114 corresponding European publications” . 19
115 77 Addition of Annex ZB, “Special national conditions” . 20
116 78 Addition of Annex ZC, “A-deviations” . 23
117 79 Addition of Annex ZD, “Classification of RCBOs Type B and C up to and including 63A
118 into energy limiting classes” . 24
119 80 Addition of Annex ZE, “List of clauses that require retesting” . 27
120 81 Addition of Annex ZN, “Additional requirements and tests for RCBOs consisting of one
121 residual current protection function and several independent two-pole overcurrent
122 protection functions” . 27
123 European foreword
124 This document (prEN IEC 61009-1:2026/prAA:2026) has been prepared by CLC/TC 23E “Circuit breakers and
125 similar devices for household and similar applications”.
126 This document is currently submitted to the Enquiry.
127 The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 60 months (to
conflicting with this document have to be be confirmed or
withdrawn modified when voting)
128 This document is read in conjunction with prEN IEC 61009-1:2026.
129 This document includes the following significant technical modifications with respect to
130 prEN IEC 61009-1:2026:
131 — Only the essential common changes existing in EN 61009-1:2012 and all of its amendments and
132 corrigenda (if any) are maintained in this document.
133 1 Modification to the Introduction
134 Replace list item 2) with the following:
135 “2) IEC 61009-2-1, Residual current operated circuit-breakers with integral overcurrent protection for
136 household and similar uses (RCBOs) – Part 2-1: RCBOs according to classification 4.1.1”
137 2 Modifications to Clause 1, “Scope”
138 Delete the second sentence of the 6th paragraph “Additional requirements can be necessary for RCBOs used
139 in locations which have severe environmental conditions”.
140 Add in the 6th paragraph, after “RCBOs within the scope of this document are intended for use in an
141 environment with pollution degree 2 (see 7.3)” the following: “and overvoltage category III”.
142 Delete in the third paragraph after Note 6: “, with the exception of those with an uninterrupted neutral,”.
143 Delete in the first paragraph after Note 7 “It also applies to RCBOs having more than one rated current,
144 provided that the means for changing from one discrete rating to another is not accessible in normal service
145 and that the rating cannot be changed without the use of a tool”.
146 Add the following paragraph after NOTE 10:
147 “Particular requirements for RCBOs consisting of one residual current protection function and several
148 independent two-pole overcurrent protection functions are given in Annex ZN.”
rd nd
149 Delete in the 3 but last paragraph in the 2 list item “without a tool”.
150 Replace the last paragraph with the following:
151 “This document is not intended to be used alone; it is intended to be used in conjunction with IEC 61009-2-1.”
152 3 Modification to Clause 2, “Normative references”
153 Delete the following reference:
154 IEC 62873-3-3, Residual current operated circuit-breakers for household and similar use – Part 3-3: Specific
155 requirements for devices with screw-type terminals for external untreated aluminium conductors and with
156 aluminium screw-type terminals for use with copper or with aluminium conductors
157 4 Modifications to Clause 3, “Terms and definitions”
158 Add the following new term entries:
159 “3.Z1
160 plug-in RCBO
161 RCBO having one or more plug-in terminals (see 3.Z2) and designed for use with appropriate means for the
162 plug-in connection
163 3.Z2
164 plug-in terminal
165 terminal the electrical connection and disconnection of which can be made without displacing the conductors
166 of the corresponding circuit
167 Note 1 to entry: The connection is made without the use of a tool and is provided by the resilience of the fixed and/or
168 moving parts and/or by springs”
169 5 Modification to 4.1.2, “RCBO with 2 or 4 current paths operating correctly on the
170 occurrence of residual current within the voltage range of 1,1 Ue and 85 V”
171 Delete Note 1.
172 6 Modification to 4.2, “According to the possibility of adjusting the residual
173 operating current”
174 Replace the title with “Void” and delete the text.
175 7 Deletion of 4.8.4, “RCBO with screw-type terminals for aluminium conductors”
176 Delete 4.8.4, including the note.
177 8 Modifications to 4.9, “According to the number of poles and current paths”
178 Delete 4.9.1 and 4.9.5.
179 Renumber accordingly.
180 9 Modification to 4.11, “According to the I t characteristic”
181 Replace the text with the following:
182 “RCBOs of B-type and C-type, having rated current up to and including 63 A and having short-circuit breaking
183 capacity of 3 000 A, 4 500 A, 6 000 A and 10 000 A, shall be classified according to the limits of their I t
184 characteristics, measured according to 9.11.6 (see Annex ZD).
185 Other ratings and D-type RCBOs cannot be classified according to Annex ZD.”
186 10 Addition of 4.Z1, “According to the range of ambient air temperature”
187 Add the following subclause:
188 “4.Z1 According to the range of ambient air temperature
189 — RCBOs for use at ambient air temperatures between −5 °C and +40 °C;
190 — RCBOs for use at ambient air temperatures between −25 °C and +40 °C.”
191 11 Modification to 5.1, “Summary of characteristics”
192 Add the following item to the list of characteristics:
193 — ranges of ambient air temperature (see 5.3.Z1)
194 12 Modification to 5.2.1.3, “Rated impulse withstand voltage (U )”
imp
195 Replace “Table 19” with “5.3.6”.
196 13 Modification to 5.2.5, “Rated residual operating current (I )”
Δn
nd
197 Delete the 2 paragraph.
198 14 Modification to 5.3.3, “Standard values of rated residual operating current (I )”
Δn
199 Add “1 A” to the standard values.
200 Delete the note.
201 15 Modification to 5.3.6, “Standard values of rated impulse withstand voltage (U )”
imp
202 Replace the text of 5.3.6 with the following:
203 “The standard value of the rated impulse voltage is 4 kV.”
204 16 Modifications to 5.3.7.1, “Standard limit values of break time and non-actuating
205 time for alternating residual currents (RMS values) of type AC and A”
206 Delete the note.
207 17 Modification to 5.3.11, “Minimum value of the rated residual making and breaking
208 capacity (I )”
Δm
209 Replace the title of 5.3.11 with “Void” and delete the text.
210 18 Modification to 5.3.14, “Values of rated short-circuit capacity”
211 Replace the title with the following:
212 “5.3.14 Values of rated short-circuit capacity (I ) and of rated residual making and breaking capacity
cn
213 (I )”
∆m
st
214 Replace the 1 paragraph with the following:
215 “Standard values of rated short-circuit capacities and of rated residual making and breaking capacity up to and
216 including 10 000 A are given in Table 37. The values of Icn and I∆m may be different on the same product.”
217 19 Addition of 5.3.Z1, “Standard ranges of ambient air temperature”
218 Add the following subclause:
219 “5.3.Z1 Standard ranges of ambient air temperature
220 The standard ranges of ambient air temperature are:
221 — −5 °C to +40 °C;
222 — −25 °C to +40 °C.”
223 20 Modification to Clause 6, “Marking and other product information”
224 Add after the title of Clause 6 the following subclause title:
225 “6.Z1 Standard marking”
226 Delete the note.
227 Add after the paragraph that starts with “The markings of non-universal terminals …” the following:
228 “The base for plug-in RCBOs shall be marked with the following:
229 — rated current or maximum rated current;
230 — trade mark.”
231 Add the following subclause:
232 “6.Z2 Additional marking
233 Additional marking to other standards (EN or IEC or other) or additional requirements are allowed under the
234 following conditions:
235 — the RCBO shall comply with all the requirements of the additional standard;
236 — the relevant standard to which the additional marking refers shall be indicated adjacent to this marking
237 and shall be clearly differentiated or separated from the standard marking according to 6.Z1.
238 Compliance is checked by inspection and by carrying out all the test sequences required by the relevant
239 standard. Equivalent or less severe test sequences do not need to be repeated.”
240 21 Modifications to 8.1.1, “General”
rd
241 Delete in the 3 paragraph “other than those specifically intended for changing the setting of the residual
242 operating current or of the time delay”.
st th
243 Delete the 1 sentence of the 4 paragraph “Changing from … a tool”.
244 Delete Note 1.
245 Delete the sentence after Note 1.
246 Delete Note 4.
247 Renumber the notes accordingly.
248 22 Modification to 8.1.2, “Mechanism”
249 Delete the note.
250 23 Modification to 8.1.5, “Terminals for external conductors”
251 Replace in the last paragraph of 8.1.5.1 “IEC 62873-3-1, IEC 62873-3-2, and IEC 62873-3-3, as relevant for
252 the type of connection” with “IEC 62873-3-1 and IEC 62873-3-2, as relevant for the type of connection”.
253 Delete in 8.1.5.2 the last list item “—  terminal for untreated aluminium conductors …”.
254 24 Addition of 8.1.Z1, “Mechanical mounting of plug-in RCBOs”
255 Add the following subclause:
256 “8.1.Z1 Mechanical mounting of plug-in RCBOs
257 8.1.Z1.1 General
258 The mechanical mounting of plug-in RCBOs shall be reliable and have adequate stability in accordance with
259 8.1.Z1.2 and 8.1.Z1.3.
260 8.1.Z1.2 Plug-in RCBOs, the holding in position of which does not depend solely on their plug-in
261 connection(s)
262 Compliance of the mechanical mounting is checked by the relevant tests of 9.12.
263 8.1.Z1.3 Plug-in RCBOs, the holding in position of which depends solely on their plug-in connection(s)
264 Compliance of the mechanical mounting is checked by the relevant tests of 9.12.”
265 25 Addition of 8.5.4.Z1, “Effect of single-phase loading of multi-pole RCBO on the
266 tripping characteristic”
267 Add the following subclause:
268 “8.5.4.Z1 Effect of single-phase loading of multi-pole RCBO on the tripping characteristic
269 Single-phase loading of RCBO with more than 2 current paths shall not have a significant effect on the
270 overcurrent tripping characteristic.
271 Compliance is checked by the tests of 9.9.2.Z1.”
272 26 Modifications to 8.11, “Test device”
nd
273 Replace the 2 paragraph with the following:
274 “For RCBOs with rated residual current of 30 mA the ampere-turns produced when operating the test device
275 of a RCBO, supplied at rated voltage or at the highest value of the voltage range, if applicable, shall not
276 exceed 1,66 times the ampere-turns produced, when a residual current equal to I is passed through one of
Δn
277 the poles of the RCBO.
278 For RCBOs with rated residual currents other than 30 mA the ampere-turns produced when operating the test
279 device of an RCBO supplied at rated operational voltage or at the highest value of the voltage range, if
280 applicable, shall not exceed 2,5 times the ampere-turns produced, when a residual current equal to I is
Δn
281 passed through one of the poles of the RCBO.”
rd
282 Delete the 3 paragraph “In the case of RCBOs having . shall be used.”
283 27 Addition of 8.Z1, “Behaviour of RCBOs at low ambient air temperatures”
284 Add the following subclause:
285 “8.Z1 Behaviour of RCBOs at low ambient air temperatures
286 RCBOs for use in the range of –25 °C to +40 °C (see 4.Z1) shall operate reliably at low temperatures.
287 Compliance is checked by the tests of 9.Z1.”
288 28 Modification to 9.1, “General”
st
289 Add the following note after the 1 paragraph:
290 “NOTE  To verify compliance of additional marking to 6.Z2, if any, tests are carried out according to the relevant
291 standard.”
292 29 Modification to 9.2, “Test conditions”
293 Delete Note 2 and Note 3.
294 30 Modification to 9.4, “Test of reliability of screws, current-carrying parts and
295 connections”
th
296 Add after the 6 paragraph the following paragraph:
297 “Plug-in connections are tested by plugging the RCBO in and pulling it out five times. After the test the
298 connections shall not have become loose, nor shall their electrical function be impaired.”
299 31 Modification to 9.5, “Test of reliability of screw-type terminals for external copper
300 conductors”
301 Delete the note in 9.5.2.
302 32 Modification to 9.7.7.2, “Verification of clearances with the impulse withstand
303 voltage”
th
304 Replace in the 4 paragraph “Table 19” with “5.3.6”.
305 33 Modification to 9.7.7.3, “Verification of resistance of the insulation of open
306 contacts against an impulse voltage (suitability for isolation)”
nd
307 Replace the 2 paragraph with the following:
308 “The test impulse voltage values are given in Table 23, in accordance with the rated impulse voltage given in
309 5.3.6. These values are corrected for barometric pressure and/or altitude.”
310 34 Modification to 9.8.2, “Test procedure”
th
311 Replace the 4 paragraph with the following note:
312 “NOTE  For testing 4-pole devices, a single test with all poles in series, including the N pole, is more stringent than the
313 required test.”
314 35 Addition of 9.9.2.Z1, “Test of effect of single-phase loading on the over-current
315 tripping characteristic of RCBO with three or four current paths”
316 Add the following new subclause:
317 “9.9.2.Z1 Test of effect of single-phase loading on the over-current tripping characteristic of RCBO
318 with three or four current paths
319 This test does not apply to RCBOs obtained by the assembly of an adaptable residual current unit on a circuit-
320 breaker complying with EN 60898-1.
321 RCBOs with three or four current paths are loaded on 2 current paths. Where a switched neutral pole exists,
322 the test circuit shall include the neutral pole. The test current having the value of 1,2 times the conventional
323 tripping current is applied, starting from cold.
324 Except for the neutral pole if applicable, the test is carried out on different poles for each sample.
325 The RCBO shall trip within the conventional times as for test b according to Table 39.”
326 36 Modification to 9.10.2, “Test procedure”
327 Delete the last paragraph.
328 37 Modification to 9.10.3, “Condition of the RCBO after test”
nd
329 Replace the last sentence of the 2 paragraph with the following:
330 “One test only is carried out, on one pole taken at random, with measurement of break time: the latter shall not
331 exceed the value specified in Table 11 at l .”
∆n
332 38 Modification to 9.11.1, “General conditions for test”
rd
333 Delete the 3 paragraph.
334 39 Modification to 9.11.2, “Test circuit for short-circuit performance”
st th st
335 Delete the 1 and the 4 list items of the 1 paragraph.
rd
336 Replace the last sentence of the 3 paragraph “This resistor may be omitted …” with the following note:
337 “NOTE  The test is more stringent than the required test if this resistor is omitted.”
th
338 Replace in the 9 paragraph “9.11.13” with “9.11.11.4 d)”.
339 Delete the first list item in the last but one paragraph.
340 40 Modification to 9.11.3, “Values of test quantities”
rd
341 Replace in the 3 paragraph “105%” with “110 %”.
th
342 Replace in the 4 paragraph “105 %” with “110 % (0, - 5 %)”.
th
343 Replace the last sentence of the 4 paragraph “The upper limit value may be increased with the approval of
344 the manufacturer” with the following note:
345 “NOTE  The test is more stringent than the required test if the upper limit is increased.”
346 41 Modification to 9.11.4, “Tolerances on test quantities”
347 Replace, in the last list item, “±5 %” with “0, - 5 %”.
348 42 Modification to 9.11.9.1, “General”
st
349 Delete, at the end of the 1 paragraph “or, with the agreement of the manufacturer, according to 9.11.9.2”.
350 43 Modification to 9.11.9.2, “Test in free air”
th
351 Add the following note after the 4 paragraph:
352 “NOTE  Ionized gases are emitted from circuit breakers during short-circuit disconnection. These gases can cause
353 flashovers at the terminals of the circuit breakers or other live parts mounted above or below, depending on the location of
354 the gas vents.”
th
355 Replace in the 7 paragraph “1 500 A” with “3 000 A”.
356 Replace the last paragraph with the following:
357 “For higher short-circuit currents up to Icn the distance “a” may be increased and/or additional barriers or
358 insulating means may be fitted, as stated by the manufacturer; “a”, if increased, shall be chosen from the
359 series 40 mm, 45 mm, 50 mm, 55 mm, etc. but not exceeding 250 mm and stated by the manufacturer
360 according to Clause 6.”
361 44 Modification to 9.11.11.2.1 “Tests on all RCBOs”
nd
362 Replace in the 2 paragraph “105 %” with “110 %”.
nd
363 Add after the 2 paragraph the following:
364 “Phases which do not carry the short circuit current during this test shall be connected to the supply voltage at
365 the line terminals.”
366 Add at the end of 9.11.11.2.1 the following:
367 “The measurement of the breaking time shall be carried out at every test and the values shall comply with the
368 values of Table 11.”
369 45 Modification to 9.11.11.2.2, “Short-circuit test on RCBOs for verifying their
370 suitability for use in IT systems”
nd
371 Replace in the 2 paragraph “105 % of the rated phase to phase voltage value” with “105 % of 400 V”.
rd
372 Replace in the 3 paragraph “105 % of U ” with “105 % of 230 V”.
o
373 Delete the last paragraph.
374 46 Modification to 9.11.11.3, “Test at 1 500 A”
th
375 Delete in the 7 paragraph “single-pole and”.
376 47 Modification to 9.11.11.4, “Test above 1 500 A”
377 Delete in b) 2) “single-pole and”.
378 Add the following new list number item:
379 “
380 d) Test at the residual making and breaking capacity I∆m
381 The test circuit is calibrated according to 9.11.7.1 and 9.11.7.4
382 The test is carried out on one pole taken at random which shall not be the switched neutral or the
383 overcurrent unprotected pole.
384 In addition, phases which do not carry the short-circuit current during this test shall be connected to their
385 supply voltage at the corresponding terminals.
386 The sequence of operation is:
387 O - t - CO
388 For the “O” operations, the making switch T is synchronized with respect to the voltage wave so that the
389 circuit is closed on the point 15° on the wave for the “O” operation on the first sample.
390 This point is then shifted by 30° for the “O” operation on the second sample and by a further 30° for the
391 “O” operation on the third sample.
392 The synchronization tolerance shall be ± 5°.
393 For three- and four-pole RCBOs, the same pole shall be used as reference for the purpose of
394 synchronization.
395 The test procedure is shown in Table 44.”
396 48 Modification to 9.11.12.2, “Verification of the RCBO after short-circuit test”
st
397 Add in the 1 sentence, after “After the tests according to 9.11.11.4 c) ”and 9.11.11.4 d)”.
398 Add the following list number item d):
399 “
400 d) After the test of 9.12.11.4 d), under the conditions of IEC 61009-2-1:2024, 9.9.1.2.3 or
401 IEC 61009-2-2:2024, 9.9.1.2.3, the RCBO shall trip with a test current of 1,25 IΔn. One test only is made
402 on one pole, taken at random, with measurement of break time. This shall not exceed the value specified
403 in Table 11 at I∆n.”
404 49 Deletion of 9.11.13, “Verification of the rated residual making and breaking
405 capacity (IΔm)”
406 Delete the subclause 9.11.13.
407 50 Modification to 9.12.2.1, “General”
st
408 Replace the 1 paragraph with the following:
409 “Compliance is checked on those exposed parts of the RCBO mounted as for normal use (see note in 8.2),
410 which may be subjected to mechanical impact in normal use,
411 — by the test of 9.12.2.2, for all types of RCBO;
412 — by the tests of 9.12.2.3 for RCBOs intended to be mounted on a rail and for all types of plug-in RCBOs
413 designed for surface mounting;
414 — by the tests of 9.12.2.4 for plug-in RCBOs, the holding in position of which depends solely on their
415 connections.”
416 51 Modification to 9.12.2.3, “Test for RCBOs intended to be mounted on a rail”
417 Add after the first paragraph the following:
418 “Plug-in RCBOs designed for surface mounting are mounted complete with the appropriate means for the
419 plug-in connection but without cables being connected and without any cover plate.”
420 52 Addition of 9.12.2.4, “Test for plug-in RCBOs”
421 Add the following subclause:
422 “9.12.2.4 Test for plug-in RCBOs
423 Plug-in RCBOs, the holding in position of which depends solely on their connections, are mounted, complete
424 with the appropriate plug-in base but without cables being connected and without any cover-plate, on a
425 vertical rigid wall.
426 A force of 20 N is applied to the RCBO portion at a point equidistant between the plug-in connections, without
427 jerks for 1 min (see Figure Z5).
428 During this test the RCBO portion shall not become loose and shall not move from the base portion and after
429 the test both portions shall show no damage impairing their further use.”
430 53 Modification to 9.13.1, “Test on complete RCBOs”
th
431 Replace the second sentence of the 4 paragraph with the following:
432 “One test only is made on one pole taken at random, with measurement of break lime: the latter shall not
433 exceed the value specified in Table 11 at I ∆n.”
434 54 Modification to 9.16, “Verification of the operation of the test device at the limits
435 of rated operational voltage”
rd
436 Replace the 3 paragraph with the following:
437 “In order to verify that at rated voltage or the highest voltage of the voltage range, if applicable, the ampere-
438 turns due to the operation of the test device are less than
439 — 1,66 times the ampere turns produced at rated residual current for RCBO 30 mA; and
440 — 2,5 times the ampere turns produced at rated residual current for all other RCBO
441 the impedance of the circuit is measured and the test ampere turns are calculated, taking into account the
442 configuration of the circuit of the test device.”
443 55 Modification to 9.20.1.3, “Test procedure”
st
444 Delete the 1 paragraph.
445 56 Modification to 9.20.1.5, “Final verification”
nd
446 Replace the 2 sentence with the following:
447 “One test only is made on one pole taken at random, with measurement of the break time: the latter shall not
448 exceed the value specified in Table 11 at I .”
∆n
449 57 Modifications to 9.20.2, “Test with temperature of 40 °C”
st
450 Delete the 1 paragraph.
nd
451 Replace the 2 sentence of the last paragraph with the following:
452 “One test only is made on one pole taken at random, with measurement of the break time: the latter shall not
453 exceed the value specified in Table 11 at I .”
∆n
454 58 Modifications to 9.21, “Verification of withstand against ageing”
nd
455 Replace the 2 sentence of the last paragraph with the following:
456 “One test only is made on one pole taken at random, with measurement of the break time: the latter shall not
457 exceed the value specified in Table 11 at I .”
∆n
458 59 Modification to 9.24.3, “Additional tests for RCBOs with a terminal intended to be
459 connected to the PE”
st
460 Delete the 1 paragraph.
461 60 Modifications to Table 1, “Marking”
462 Replace, respectively, the rows C, D, G, H and T with the following:
C Rated operational voltage(s) with the symbol ~
a
D Rated current without symbol “A”, preceded by the symbol of overcurrent instantaneous tripping (B, C or
D), for example B16
G “Void“
H Rated short-circuit capacity (in amperes) for RCBO in a rectangle without symbol “A”
T “Void”
468 Add after the row W the following rows:
469 “
f
X energy limiting class (e.g. 3) in a square in accordance with Annex ZD as applicable
Y RCBOs according to 4.Z1 shall be marked with the symbol (the value −25 included in the snowflake
symbol according to Figure 0027 of ISO 7000) if relevant
Z Additional marking of performance to other standards or additional requirements according to 6.Z2
AA Indication of grid distance “a” according to 9.11.9.2, if different from 35 mm
AB Information related to the grid distance “a” if different from 35 mm or if requiring additional barrier(s) to
achieve the grid distance “a”
g
470 Add in row X “X ” in the column “On the product”.
471 Add in rows Y and Z an “X” in the column “On the product”.
472 Add in rows AA and AB an “X” in the column “In the product information”.
473 Add the following footnotes f and g:
474 “
475 f  If Annex ZD is not applicable to the device, I t characteristics shall be available on request.
476 g  Icn and the energy limiting class shall be on the device and combined together.”
477 61 Modifications to Table 11, “Standard limit values of break time and non-actuating
478 time for alternating residual currents (RMS values) for type AC and A”
nd a a
479 Replace in the 2 row, “5 I or 0,25 A ” with “0,25 A ”.
Δn
a
480 Replace footnote “a” with “  A test at 5 I is more stringent than the test required.”
Δn
nd c, d
481 Replace in the 2 row “I ” with “I ”.
Δt Δt
482 Add the following footnote:
“d
483  For the tests of 9.11.11.2.1, for a test current higher than I , the break time of I applies.”
Δt Δt
484 62 Modification to Table 19, “Rated impulse withstand voltage as a function of the
485 nominal voltage of the installation”
486 Replace the title of Table 19 with “Void”.
487 Delete Table 19.
488 63 Modifications to Table 23, “Test voltage for verifying the suitability for isolation,
489 with reference to the rated impulse withstand voltage of the RCBO and the
490 altitude where the test is carried out”
a
491 Delete the two rows corresponding to “Single-phase system with mid-point earthed 120/240 ” and “Single-
b
492 phase system 120/240 240 ”.
493 Delete footnotes a and b.
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