SIST EN 62606:2014/oprA2:2021

General requirements for arc fault detection devices

CD draft assessment requested on 2020-02-05.

Allgemeine Anforderungen an Fehlerlichtbogen-Schutzeinrichtungen

Exigences générales des dispositifs pour la détection de défaut d'arcs

Splošne zahteve za obločne detektorje

General Information

• Status: Not Published
• Public Enquiry End Date: 04-Nov-2021
• ICS: 29.120 - Electrical accessories
• ICS: 29.120.01 - Electrical accessories in general
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: EPR - Electrical accessories
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 22-Jul-2022
• Due Date: 09-Sep-2022
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: EN 62606:2013/FprA2:2022 - Amendment 2 - General requirements for arc fault detection devices

RELATIONS

• Amends: SIST EN 62606:2014 - General requirements for Arc Fault Detection Devices (AFDD) (IEC 62606:2013, modified)
• Effective Date: 24-Dec-2019
• Amended By: SIST EN 62606:2014/oprAB:2021 - General requirements for arc fault detection devices
• Effective Date: 26-Jul-2021

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 62606:2014/oprA2:2021
01-november-2021
Splošne zahteve za obločne detektorje
General requirements for arc fault detection devices
Allgemeine Anforderungen an Fehlerlichtbogen-Schutzeinrichtungen
Exigences générales des dispositifs pour la détection de défaut d'arcs
Ta slovenski standard je istoveten z: EN 62606:2013/prA2:2021
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
SIST EN 62606:2014/oprA2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62606:2014/oprA2:2021
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SIST EN 62606:2014/oprA2:2021
23E/1237/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62606/AMD2 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-08-13 2021-11-05
SUPERSEDES DOCUMENTS:
23E/1160/CD, 23E/1214A/CC
IEC SC 23E : CIRCUIT-BREAKERS AND SIMILAR EQUIPMENT FOR HOUSEHOLD USE
SECRETARIAT: SECRETARY:
Italy Mr Giovanni Cassinelli
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 121A
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of

which they are aware and to provide supporting documentation.
TITLE:
Amendment 2 - General requirements for arc fault detection devices
PROPOSED STABILITY DATE: 2024
NOTE FROM TC/SC OFFICERS:

Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to

download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National

Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,

for any other purpose without permission in writing from IEC.
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SIST EN 62606:2014/oprA2:2021
62606/AMD2/Ed1/CDV © IEC(E) 2 23E/1237/CDV
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 TECHNICAL COMMITTEE 23: ELECTRICAL ACCESSORIES
3 SUB-COMMITTEE 23E: Circuit breakers and similar equipment for household use
7 FOREWORD

8 This amendment has been prepared by subcommittee 23E: Circuit-breakers and similar

9 equipment for household use, of IEC technical committee 23: Electrical accessories.

10 The text of this amendment is based on the following documents:
FDIS Report on voting
23E/XX/FDIS 23E/XX/RVD

12 Full information on the voting for the approval of this amendment can be found in the report on

13 voting indicated in the above table.

14 The committee has decided that the contents of this amendment and the base publication will

15 remain unchanged until the stability date indicated on the IEC website under

16 "http://webstore.iec.ch" in the data related to the specific publication. At this date, the

17 publication will be
18 • reconfirmed,
19 • withdrawn,
20 • replaced by a revised edition, or
21 • amended.
23 _____________
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26 INTRODUCTION
27 To replace the last paragraph by the following

28 This document covers devices designed to be installed in a distribution board at the origin of

29 one final circuits of a fixed installation.
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30 GENERAL REQUIREMENTS FOR ARC FAULT DETECTION DEVICES
31 Replace the existing title of this document with the following new title:
32 GENERAL REQUIREMENTS FOR ARC FAULT DETECTION AND
33 PROTECTION DEVICES (AFDDs)
36 1 Scope

37 Replace the existing second dash of second paragraph by the following new second dash:

38 – as a single device, with arc fault detection integrated in or assembled by manufacturer to a

39 protective device; or

40 In the second sentence of the last paragraph, after “pollution degree 2”, add “and overvoltage

41 category III”
42 2 Normative references

43 Replace the following existing normative references by the following new normative references:

44 IEC 60898-1:2015, Electrical accessories – Circuit-breakers for overcurrent protection for

45 household and similar installations – Part 1: Circuit-breakers for a.c. operation

46 IEC 60898-1:2015/AMD1:2019

47 IEC 61008-1:2010, Residual current operated circuit-breakers without integral overcurrent

48 protection for household and similar uses (RCCBs) – Part 1: General rules
49 IEC 61008-1:2010/AMD1:2012
50 IEC 61008-1:2010/AMD2:2013

51 IEC 61009-1:2010, Residual current operated circuit-breakers with integral overcurrent

52 protection for household and similar uses (RCBOs) – Part 1: General rules
53 IEC 61009-1:2010/AMD1:2012
54 IEC 61009-1:2010/AMD2:2013
55 Add the following normative references:

56 IEC 61000-4-2, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement

57 techniques - Electrostatic discharge immunity test

58 IEC 61000-4-3, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement

59 techniques - Radiated, radio-frequency, electromagnetic field immunity test

60 IEC 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement

61 techniques - Electrical fast transient/burst immunity test

62 IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement

63 techniques - Surge immunity test
64 IEC 61000-4-5:2014/AMD1:2017

65 IEC 61000-4-6, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement

66 techniques - Immunity to conducted disturbances, induced by radio-frequency fields

67 IEC 61000-4-8, Electromagnetic compatibility (EMC) - Part 4-8: Testing and measurement

68 techniques - Power frequency magnetic field immunity test
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69 IEC 61000-4-11, Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement

70 techniques - Voltage dips, short interruptions and voltage variations immunity tests for

71 equipment with input current up to 16 A per phase

72 IEC 61000-4-16:2015, Electromagnetic compatibility (EMC) - Part 4-16: Testing and

73 measurement techniques - Test for immunity to conducted, common mode disturbances in the

74 frequency range 0 Hz to 150 kHz

75 IEC 62873-2, Residual current operated circuit-breakers for household and similar use – Part

76 2: Residual current devices (RDCs) – Vocabulary
77 3 Terms and definitions
78 Replace the first sentence by the following sentence

79 For the purposes of this document, the terms and definitions given in IEC 62873-2 and the

80 following apply.
81 3.4 arc fault detection unit
82 Replace the existing Note 1 to entry by the following new Note 1 to entry:

83 Note 1 to entry The interruption of the current can either be provided by opening means (see 4.1.1) or by a protective

84 device integrating an AFD unit (see 4.1.2.1) or by a protective device assembled with an AFD unit (see 4.1.2.2 or

85 4.1.3).
86 4 Classification
87 4.1 According to the method of construction
88 Replace the existing subclause 4.1.2 by the following new subclause:

89 4.1.2 AFDD as one single device, comprising an AFD unit and a protective device.

90 4.1.2.1 AFD unit integrated in a protective device complying with one of the
91 following standards: IEC 60898-1, IEC 61008-1, IEC 61009-1 or IEC 62423.

92 4.1.2.2 AFD unit assembled by the manufacturer to a protective device complying

93 with one of the following standards: IEC 60898-1, IEC 61008-1, IEC 61009-1 or
94 IEC 62423.

95 For this classification, the protective device is unchanged from the existing compliant version

96 except for marking and/or catalogue/serial number.
97 5 Characteristics of AFDDs
99 5.4 Standard values of rated impulse withstand voltage (U )
imp

100 Replace, after Table 4, the existing paragraph by the following new paragraph:

101 In case an AFDD is intended to be connected (see 4.1.1) or integrated (see 4.1.2.1) or

102 assembled (see 4.1.2.2 or 4.1.3) with one or several declared protective devices whose

103 standard values of rated impulse withstand voltage are more severe than those mentioned in

104 Table 4, the standard conditions for operation in service and for installation of the most severe

105 protective device standard shall apply.
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106 5.5 Coordination with short-circuit protective devices (SCPDs)
107 5.5.1 General
108 Replace the first paragraph by the following:

109 AFDDs classified according to 4.1.2 and 4.1.3 using an RCCB as protective device (IEC 61008-

110 1 or IEC 62423) and AFDDs classified according to 4.1.1 shall be protected against short-

111 circuits by means of circuit-breakers or fuses complying with their relevant standards according

112 to the installation rules of IEC 60364 series.
113 6 Marking and other product information

114 To remove the sentence “the markings shall be on the AFDD …is installed” below Table 5

115 In the sixth paragraph after Table 5, to remove the sentence “provisionally the use of national

116 indications only is allowed”
117 To replace the last but two paragraph by the following:

118 The markings shall appear on the AFDD or, if the space available is not sufficient, on the

119 smallest package unit or in technical information.
120 7 Standard conditions for operation in service and for installation
121 7.1 Standard conditions
122 Modify note b of Table 6 as follows

123 Values outside the range are admissible where more severe climatic conditions prevail.

124 Replace, after Table 6, the existing paragraph by the following new paragraph:

125 In case an AFDD is connected (see 4.1.1) or integrated (see 4.1.2.1) or assembled (see 4.1.2.2

126 or 4.1.3) with one or several associated declared protective devices whose standard conditions

127 for operation in service and for installation are more severe than those mentioned in Table 6,

128 the standard conditions for operation in service and for installation of the most severe protective

129 device standard shall apply.
130 8 Requirements for construction and operation
131 8.1 General

132 Replace the existing tenth and eleventh paragraphs with the following new text:

133 AFDDs classified according to 4.1.2.1 shall comply with the relevant standard of the protective

134 device with which it is integrated (according to IEC 60898-1, IEC 61008-1, IEC 61009-1, or

135 IEC 62423 as applicable) and additionally to the requirements and tests given in this document.

136 Where tests included in this document are also included in IEC 60898-1, IEC 61008-1,

137 IEC 61009-1, or IEC 62423, a selection of the most stringent requirements and tests among all

138 applicable standards shall be applied only once.

139 AFDDs classified according to 4.1.2.2 shall comply with the requirements given in this document

140 which include the verification (according to IEC 60898-1, IEC 61008-1, IEC 61009-1, or

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141 IEC 62423 as applicable) of the correct operation of the protective device with which it is

142 assembled.
143 8.2.3 Clearances and creepage distances (see Annex B)
144 Remove in the third paragraph “e)”.
145 Remove in the second dash after third paragraph “e)”.
146 8.3 Protection against electric shock
147 To modify the third paragraph as follows

148 For AFDDs other than those of the plug-in type, external parts, other than screws or other

149 means for fixing covers and labels, which are accessible when the AFDDs are mounted and

150 wired as in normal conditions of use, shall either be of insulating material, or be lined throughout

151 with insulating material.
152 8.5 Temperature rise
153 8.5.1 Temperature-rise limits

154 Replace, after Table 9, the existing paragraph by the following new paragraph:

155 In case an AFDD is wired (see 4.1.1) or integrated (see 4.1.2.1) or assembled (see 4.1.2.2 or

156 4.1.3) with one or several associated declared protective devices whose standard conditions

157 for temperature rise are more severe than those mentioned in Table 9, the standard conditions

158 for operation in service and for installation of the most severe protective device standard shall

159 apply (IEC 60898-1, IEC 61008-1, IEC 61009-1 and IEC 62423).
160 8.6 Operating characteristics
161 8.6.1 Operating characteristics of the protective device part
162 Replace the existing second paragraph by the following new paragraph:

163 Compliance is checked by carrying out the relevant tests of the specified relevant standard,

164 according to 9.1.1.
165 8.15 Electromagnetic compatibility (EMC)
166 To replace the first paragraph by the following
167 AFDDs shall comply with the EMC requirements of this document.
168 9 Testing procedure
169 9.1 General
170 9.1.1 General testing procedure for the different type of AFDDs

171 Replace the existing fourth paragraph with the three following new paragraphs:

172 AFDDs classified according to 4.1.2.1 where the AFD unit is integrated in the MPD shall first

173 be tested according to IEC 60898-1, IEC 61008-1, IEC 61009-1, or IEC 62423, as applicable.

174 AFDDs classified according to 4.1.2.2 where the AFD unit is assembled to the MPD, the MPD

175 shall comply with IEC 60898-1, IEC 61008-1, IEC 61009-1 or IEC 62423, as applicable.

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176 The AFD unit assembled to the MPD shall not inhibit the correct operation of the main protective

177 device. The following verifications of the mechanism and the operating characteristics of the

178 combination shall be made on the devices having the largest number of poles, highest In and

179 lowest IΔn, as applicable:

180 a) 8.1.2, 9.10.2.1, 9.10.3 (only at the upper limit of instantaneous tripping current) and 9.11 of

181 IEC 60898-1:2015 and IEC 60898-1:2015/AMD1:2019 for circuit-breakers;

182 b) 8.1.2, 9.2.1, 9.9.2.2, 9.9.2.3a), 9.10 of IEC 61008-1:2010, IEC 61008-1:2010/AMD1:2012

183 and IEC 61008-1:2010/AMD2:2013 for RCCBs;

184 c) 8.1.2, 9.9.1.2a), 9.9.1.2b), 9.9.1.2c) 1), 9.9.2.1, 9.9.2.2 (only at the upper limit of

185 instantaneous tripping current), 9.10 of IEC 61009-1:2010, IEC 61009-1:2010/AMD1:2012

186 and IEC 61009-1:2010/AMD2:2013 for RCBOs.

187 For test according to 8.1.2 of relevant product standard, only inspection and manual tests apply.

188 Replace the existing fifth paragraph with the following new paragraph:

189 After completion of the required above tests of IEC 60898-1, IEC 61008-1, IEC 61009-1, or

190 IEC 62423, the additional tests given in this document shall be applied in order to show

191 conformity to this document.
192 9.1.2 The characteristics of AFDDs are checked by means of type tests
193 Table 10 - List of type tests
194 Remove, in Table 10, eighth row, the existing footnote after 9.10.
195 Replace, in Table 10, the existing footnote by the following new footnote:

196 For AFDDs classified according to 4.1.2.1, these tests are already covered by the tests according to the relevant

197 standard for RCDs or circuit breakers and need not to be repeated here.
198 9.7 Test of dielectric properties
199 9.7.3 Insulation resistance of the main circuit
200 Remove item d) and the note below
201 Rename item e) to item d)
202 9.7.4 Dielectric strength of the main circuit
203 Replace the fifth paragraph with the following paragraph:
204 The values of the test voltage shall be as follows:
205 – 2 000 V for a) to c) of 9.7.3;
206 – 2 500 V for d) of 9.7.3.

207 9.7.6 Capability of control circuits connected to the main circuit in respect of

208 withstanding high DC voltages due to insulation measurements
209 Replace the existing last paragraph by the following new paragraph:

210 After this treatment, the functionality of the AFDD is verified by repeating the test of 9.9.2.4 at

211 the lowest current of Table 1 or Table 2, as applicable, without measurement of break time.

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212 9.7.7 Verification of impulse withstand voltages (across clearances and across solid

213 insulation) and of leakage current across open contacts
214 9.7.7.2 Verification of clearances with the impulse withstand voltage
215 Remove in the first paragraph “e)”.
216 Remove in the sixth paragraph “e)”.

217 9.7.7.5 Verification of the behaviour of components bridging the basic insulation

218 Replace the existing last but one paragraph by the following new paragraph:

219 Then, the AFDD is connected to the mains in accordance with the manufacturer’s instructions.

220 The functionality of the AFDD is verified by the test of 9.9.2.4 at the lowest current of Table 1

221 or Table 2, as applicable, without measurement of break time.
222 9.9.2 Series arc fault tests
223 9.9.2.1 General

224 Replace the content of subclause 9.9.2.1, modified by Amendment 1, by the following new text:

225 A representative AFDD shall clear the arcing fault in the time specified in Table 1 or Table 2 for

226 the arc current level being tested. AFDDs shall be tested up to their rated current.

227 The AFDD being supplied with all phases and neutral (if any), the tests shall be performed, if

228 applicable, between one phase, chosen at random and neutral, and between two phases chosen

229 at random.

230 The tests shall be conducted by connecting a cable specimen (prepared in accordance with

231 9.9.2.6) in series with the AFDD according to Figure 4 for tests of 9.9.2.2 to 9.9.2.5 and

232 according to Figure 38 for tests of 9.9.2.8 and 9.9.2.9.

233 The adjustment of the test currents without arcing, in the line where the cable specimen is

234 placed, is achieved by application of the line to neutral voltage reduced by 50 V to take into

235 account the value of the arc voltage during the test. For two-pole AFDDs rated 400 V the

236 adjustment of the test current without arcing is achieved by application of the line to line voltage

237 reduced by 50 V. For three-pole AFDDs, and for the adjustment of the test current only, the

238 mid-point of the resistors in Figure 38 shall be connected directly to the neutral. For tests of

239 9.9.2.2, and at the rated current only, the adjustment of the test current in the cable specimen

240 without arcing is achieved by application of the rated voltage.

241 The break time is measured at each arc current level and the measured value shall not exceed

242 the times specified in Table 1 or Table 2.

243 When the break time exceeds the times specified in Table 1 or Table 2 because the arc is not

244 persistent during this test, the test shall be repeated.

245 An arc is considered as not persistent if during at least 2 cycles, not necessarily consecutive,

246 the arc peak current is less than 1.5 A or the arc peak voltage is less than 10 V.

247 Note: One cycle is 20ms for 50 Hz
248 9.9.2.5 Test at the temperature limits
249 Add, at the end of the first dash, the following new text:
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250 …, under the conditions of 9.9.2.1.

251 Add, at the end of the first sentence of the second dash, the following new text:

252 …, under the conditions of 9.9.2.1.

253 9.9.2.8 Verification of correct operation in case of arc in a three-phase system with

254 unbalanced load

255 Replace the existing second paragraph, modified by Amendment 1, with the following new

256 paragraph:

257 The detection test shall be performed for each phase. Whatever the rated current value, the

258 current in the three phases shall be adjusted at 2,5 A, 5 A and the rated current (see Figure 38),

259 by application of the rated line to neutral voltage reduced by 50 V for all phases, deviating from

260 the adjustment requirements in 9.9.2.1. The arc test shall then be performed on each phase, in

261 turn, at the rated voltage and at the previously adjusted current.
262 9.9.3 Parallel arc fault tests

263 9.9.3.1 Verification of correct operation in case of parallel arc with limited current

264 Replace the fourth paragraph by the following new paragraph:

265 The AFDD being supplied with all phases and neutral (if any), the tests shall be performed, if

266 applicable, between one phase, chosen at random and neutral, and between two phases chosen

267 at random

268 9.9.3.2 Verification of correct operation in case of parallel arc cable cutting test

269 Replace the sixth paragraph by the following new paragraph:

270 The steel blade shall be 1,2 mm thick (nominal) for a 120 V rated AFDD or 3 mm thick (nominal)

271 for a 230 V AFDD, with approximate dimensions of 32 mm by 140 mm. The blade shall be sharp

272 and shall be replaced or re-sharpened as necessary. The blade shall be attached to a lever arm

273 to maintain a cutting angle to produce the effect. Using the test apparatus shown in Figure 8,

274 or equivalent, the blade is to be positioned so that solid contact is made with one conductor

275 and arcing contact is made with the second conductor.
276 9.9.4 Masking test, verification of correct operation
277 9.9.4.1 General

278 Replace the last sentence of the first paragraph by the following new sentence:

279 Either an arc generator or carbonized cable specimen, as declared by the manufacturer, can

280 be used to generate an arc fault, this shall be indicated in the test report.

281 Replace the second paragraph by the following new paragraph:

282 The AFDD being supplied with all phases and neutral (if any), the tests shall be performed, if

283 applicable, between one phase, chosen at random and neutral, and between two phases chosen

284 at random.
285 9.9.4.2 Masking test with inhibition loads

286 Replace the existing first paragraph, modified by Amendment 1, with the following new paragraph:

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287 This test applies to single-pole AFDDs with two current paths, two-pole AFDDs and four-pole

288 AFDDs.

289 Replace the first sentence of the fifth paragraph and items a), b), c) and d), modified by

290 Amendment 1, with the following new text (items e), f), and g) being not modified):

291 The AFDD shall be tested with each of the following masking loads operating in a steady state:

292 a) a vacuum cleaner, rated at 5 A to 7 A for a 230 V rated voltage AFDD and at 10 A to 14 A

293 for a 120 V rated voltage AFDD, full load having a universal motor;

294 b) an electronic switching mode power supply (or power supplies), having a total load current

295 of at least 2,5 A for a 230 V rated voltage AFDD and 5 A for a 120 V rated voltage AFDD,

296 with a minimum total harmonic distortion (THD) of 100 %, and individual minimum current

297 harmonics of 75 % at the 3rd , 50 % at the 5th, and 25 % at the 7th;

298 NOTE 1 THD can be calculated with the formula of IEC 61000-3-2:2014, 3.14.2, for total harmonic distortion

299

300 c) a capacitor start (air compressor type) motor (compressor operating with open valve to

301 prevent pressure in the air tank).

302 – for AFDD rated 120 V, use a compressor motor with a peak inrush current of 130 A

303 ± 10 %;
304 – for AFDD rated 230 V, use a 2,2 kW compressor motor.

305 d) for AFDD with rated voltage of 120 V, an electronic lamp dimmer (thyristor type) 1 000 W

306 with a filtering coil controlling a 1 000 W tungsten load consisting of four 150 W bulbs and

307 four 100 W bulbs.

308 For AFDD with rated voltage of 230 V, an electronic lamp dimmer (thyristor type) 600 W with

309 a filtering coil controlling a 600 W tungsten load.

310 NOTE 2 In case incandescent tungsten bulbs cannot be found, they can be replaced by a resistive load with

311 the same power.
312 Five different tests at various conduction angle shall be done.

313 9.9.4.5 Masking test with inhibition loads for three-pole and four-pole AFDDs

314 Replace the existing first paragraph, added by Amendment 1, with the following new paragraph:

315 A series of tests, according to 9.9.2.9, is performed with the following inhibition loads. The

316 AFDD and arc fault tester are connected in the circuit according to Figure 39.

317 Replace the existing item b) and the two following paragraphs, added by Amendment 1, with

318 the following new text:

319 b) a variable speed drive with a three-phase asynchronous motor adjusted in such a way that

320 the voltage applied to the motor is equal to the 80 % of the AFDD rated voltage and the

321 ratio U /f on the motor remains constant where U is the rated voltage and f the rated

n n
322 frequency.

323 The asynchronous motor consumption shall be adjusted for consuming 2,5 A +0/+20 % per

324 AFDD pole for 400 V rated voltage AFDD and 5 A +0/+20% per AFDD pole for 230 V rated

325 voltage AFDD. The switching frequency of the variable speed drive shall be between 10 kHz

326 and 12 kHz.
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327 9.9.5 Unwanted tripping test

328 9.9.5.4 Test with various disturbing loads for single-pole AFDD with two current path

329 and two-pole AFDD

330 Replace the existing heading of subclause 9.9.5.4, modified by Amendment 1, by the following

331 new heading:

332 9.9.5.4 Test with various disturbing loads for single-pole AFDD with two current

333 paths, two-pole AFDDs and four-pole AFDDs
334

335 9.9.5.5 Test with various disturbing loads for three-pole and four-pole AFDDs

336 Replace the existing item b) and the two following paragraphs, added by Amendment 1, by the

337 following new text:

338 b) a variable speed drive with a three-phase asynchronous motor adjusted in such a way that

339 the voltage applied to the motor is equal to the 80 % of the AFDD rated voltage and the

340 ratio U /f on the motor remains constant where U is the rated voltage and f the rated

n n
341 frequency.

342 The asynchronous motor consumption shall be adjusted for consuming 2,5 A +0/+20% per

343 AFDD pole for 400 V rated voltage AFDD and 5 A +0/+20 % per AFDD pole for 230 V rated

344 voltage AFDD. The switching frequency of the variable speed drive shall be between 10 kHz

345 and 12 kHz.
346 9.10 Verification of mechanical and electrical endurance
347 9.10.3 Condition of the AFDD after test
348 Replace the existing second paragraph with the following new paragraph:

349 Afterward the functionality of the AFDD is verified by repeating the test of 9.9.2.4 at the lowest

350 current of Table 1 or Table 2, as applicable, without measurement of the break time.

351 9.11 Verification of the behaviour of the AFDD under short-circuit conditions

352 9.11.1 General
353 Replace the existing last paragraph with the following new paragraph:

354 Afterward, the functionality of the AFDD is verified by repeating the test of 9.9.2.4 at the lowest

355 current of Table 1 or Table 2, as applicable, without measurement of the break time.

356 9.11.2 Short-circuit tests for AFDDs according to 4.1.1
357 9.11.2.2 General conditions for test
358 Remove the last but one sentence of item a):

359 Unless otherwise stated in the test report, the resistance of the measuring circuits shall be at

360 least 100 Ω per volt of the power frequency recovery voltage.
361 Remove the end of the first paragraph of item f):

362 or, with the agreement of the manufacturer, according to f1) of this subclause.

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363 Replace the existing last paragraph of item i), modified by Amendment 1, with the following new

364 paragraph:

365 Under the test conditions of 9.9.2.4, the AFDD shall trip with a test current equal to the lowest

366 current of Table 1 or Table 2, as applicable, without measurement of break time. The

367 polyethylene sheet shall show no holes visible with normal or corrected vision without additional

368 magnification.
369 9.11.2.3 Verification of the rated making and breaking capacity (I )
370 Add, at the end of the existing item b), the following new text:

371 It is acceptable that the sample trips before the actuator moves to the OFF position.

372 9.11.2.4 Verification of the rated making and breaking capacity on one pole (Im1) of

373 AFDDs and their suitability for use in IT systems

374 Add, at the end of the existing first paragraph of item b), modified by Amendment 1, the following

375 new text:
376 It is acceptable that the sample trips before the
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