FprEN 50065-4-7

SLOVENSKI STANDARD
01-julij-2021
Signalizacija po nizkonapetostnih električnih napeljavah v frekvenčnem območju
od 3 kHz do 148,5 kHz - 4-7. del: Prenosni nizkonapetostni ločilni filtri - Varnostne
zahteve
Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5
kHz Part 4-7: Portable low voltage decoupling filters - Safety requirements
Signalübertragung auf elektrischen Niederspannungsnetzen im Frequenzbereich 3 kHz
bis 148,5 kHz Teil 4-7: Bewegliche Niederspannungs-Entkopplungsfilter -
Sicherheitsanforderungen
Transmission de signaux sur les réseaux électriques basse tension dans la bande de
fréquences de 3 kHz à 148,5 kHz - Partie 4-7: Filtres de découplage basse tension
mobiles - Exigences de sécurité
Ta slovenski standard je istoveten z: prEN 50065-4-7
ICS:
31.160 Električni filtri Electric filters
33.040.30 Komutacijski in signalizacijski Switching and signalling
sistem systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN 50065-4-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS  Will supersede EN 50065-4-7:2005 and all of its
amendments and corrigenda (if any)
English Version
Signalling on low-voltage electrical installations in the frequency
range 3 kHz to 148,5 kHz Part 4-7: Portable low voltage
decoupling filters - Safety requirements
Transmission de signaux sur les réseaux électriques basse Signalübertragung auf elektrischen Niederspannungsnetzen
tension dans la bande de fréquences de 3 kHz à 148,5 kHz im Frequenzbereich 3 kHz bis 148,5 kHz Teil 4-7:
- Partie 4-7: Filtres de découplage basse tension mobiles - Bewegliche Niederspannungs-Entkopplungsfilter -
Exigences de sécurité Sicherheitsanforderungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-07-16.

It has been drawn up by CLC/TC 219.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard 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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 69663 Ref. No. prEN 50065-4-7 E

prEN 50065-4-7:2021 (E)
1 Contents
2 European foreword 5
3 Introduction 7
4 1 Scope .8
5 2 Normative references.8
6 3 Definitions .9
7 4 General requirements . 12
8 5 General notes on tests. 12
9 6 Rating . 12
10 7 Classification of filter devices . 13
11 7.1 According to environmental temperature conditions . 14
12 7.2 According to the rated impulse withstand voltage . 14
13 8 Marking . 14
14 8.1 Plug and socket outlet parts . 14
15 8.2 Filter parts . 14
16 8.3 Symbols . 14
17 8.4 Instruction sheets . 15
18 8.5 Terminals . 15
19 8.6 Durability . 15
20 9 Dimensions . 16
21 10 Protection against electric shock . 16
22 11 Provision for protective earthing . 16
23 12 Terminals . 17
24 12.1 Plug and socket outlet parts . 17
25 12.2 Rewirable filter devices . 17
26 13 Construction . 17
27 13.1 Plug and socket outlet parts . 17
28 13.2 Filter parts . 18
29 13.3 Non-rewirable filter parts . 18
30 13.4 Rewirable filter parts . 18
31 13.5 Insulating parts . 19
32 13.6 Filter covers . 20
33 13.7 Securing screws . 20
34 14 Resistance to ageing, protection provided by enclosures, and resistance to humidity . 20
35 14.1 Plug and socket outlet parts . 20
36 14.2 Resistance to ageing . 20
37 14.3 Resistance to harmful ingress of water . 20
38 14.4 Resistance to humidity . 20
prEN 50065-4-7:2021 (E)
39 15 Insulation resistance and dielectric strength . 21
40 15.1 Plug and socket outlet parts . 21
41 15.2 Filter parts . 21
42 16 Temperature rise . 22
43 16.1 Plug and socket outlet parts . 22
44 16.2 Filter parts . 22
45 17 Breaking capacity . 23
46 18 Normal operation . 23
47 19 Force necessary to withdraw the plug . 23
48 20 Flexible cables and their connections . 23
49 20.1 Plug and socket outlet parts . 23
50 20.2 Filter parts . 23
51 20.3 Non-rewirable parts. 24
52 20.4 Moulded-on filter device parts . 26
53 21 Mechanical strength. 26
54 21.1 Plug and socket parts . 26
55 21.2 Filter parts . 26
56 22 Resistance to heat . 27
57 22.1 Plug and socket parts . 27
58 22.2 Filter parts . 28
59 23 Screws, current-carrying parts and connections . 28
60 23.1 Plug and socket parts . 28
61 23.2 Filter parts . 28
62 24 Creepage distances and clearances . 30
63 24.1 Plug and socket parts . 30
64 24.2 Filter parts . 30
65 24.2.1 Clearances . 30
66 24.2.2 Creepage distances . 32
67 24.2.3 Solid insulation . 34
68 24.2.4 Coatings of rigid printed board assemblies . 34
69 25 Resistance to abnormal heat, to fire and to tracking . 35
70 25.1 Plug and socket parts . 35
71 25.2 Filter parts . 35
72 25.2.1 Resistance to abnormal heat and to fire . 35
73 25.2.2 Resistance to tracking . 36
74 26 Resistance to rusting . 36
75 26.1 Plug and socket parts . 36
76 26.2 Filter parts . 36
77 27 Components . 36
prEN 50065-4-7:2021 (E)
78 27.1 General . 36
79 27.2 Fuses . 37
80 27.3 Capacitors . 37
81 27.4 Resistors . 37
82 27.5 Components reducing the required impulse voltage . 38
83 28 Abnormal conditions . 38
84 28.1 General . 38
85 28.2 Fault test . 38
86 28.3 Overload test . 39
87 28.4 Protection against electric shock . 39
88 29 Protection against short-circuit . 39
89 30 Resistance to transients . 40
90 Annex A (normative) Pollution degrees . 45
91 Annex B (normative) Proof tracking test . 46
92 Annex C (normative) Types of coatings for rigid printed board assemblies . 47
93 Annex D (normative) Special national conditions . 48
94 Annex ZZ (informative) Relationship between this European standard and the safety objectives
95 of Directive 2014/35/EU [2014 OJ L96] aimed to be covered . 49
96 Bibliography . 50
prEN 50065-4-7:2021 (E)
99 European foreword
100 This document (prEN 50065-4-7:2021) has been prepared by WG 12 “Filters” of CLC/TC 205A “Mains
101 communicating systems”.
102 This document is currently submitted to the Enquiry.
103 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
104 This document will supersede EN 50065-4-7:2005 and all of its amendments and corrigenda (if any).
105 prEN 50065-4-7:2021 includes the following significant technical changes with respect to
106 EN 50065-4-7:2005:
107 The main changes introduced in this document are in Clauses 10, 14, 16, 22, 25, 30 and in the addition of
108 an Annex ZZ.
109 This document has been prepared under a mandate given to CENELEC by the European Commission
110 and the European Free Trade Association, and supports essential requirements of EU Directive(s).
111 For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
112 document.
113 Structure of EN 50065 series:
114 EN 50065 Signalling on low voltage electrical installations in the frequency range 3 kHz to
115 148,5 kHz
116 EN 50065-1 Part 1: General requirements, frequency bands and electromagnetic disturbances
117 EN 50065-2-1 Part 2-1: Immunity requirements for mains communications equipment and systems
118 operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in residential, commercial
119 and light industrial environments
120 EN 50065-2-2 Part 2-2: Immunity requirements for mains communications equipment and systems
121 operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments
122 EN 50065-2-3 Part 2-3: Immunity requirements for mains communications equipment and systems
123 operating in the range of frequencies 3 kHz to 95 kHz and intended for use by electricity suppliers and
124 distributors
125 EN 50065-4-1 Part 4-1: Low voltage decoupling filters - Generic specification
126 EN 50065-4-2 Part 4-2: Low voltage decoupling filters - Safety requirements
127 EN 50065-4-3 Part 4-3: Low voltage decoupling filters - Incoming filter
prEN 50065-4-7:2021 (E)
128 EN 50065-4-4 Part 4-4: Low voltage decoupling filters - Impedance filter
129 EN 50065-4-5 Part 4-5: Low voltage decoupling filters - Segmentation filter
130 EN 50065-4-6 Part 4-6: Low voltage decoupling filters - Phase coupler
131 EN 50065-4-7 Part 4-7: Portable low voltage decoupling filters - Safety requirements
132 EN 50065-7 Part 7: Equipment impedance
prEN 50065-4-7:2021 (E)
133 Introduction
134 When certifying or making declaration of conformity to the Low Voltage Directive 2014/35/EU in order to
135 CE mark the device it is important to state that the CE marking is only valid for the filter parts of the
136 product. The plug parts and socket-outlets parts are not covered by the Low Voltage Directive and are
137 therefore expected to comply with the relevant national standards.
prEN 50065-4-7:2021 (E)
138 1 Scope
139 This document applies to the filter part of portable devices for household and similar uses (hereafter
140 referred to as portable decoupling filters) consisting of the filter part, a plug or an appliance inlet or a
141 provision for connection by terminals or with a non-rewirable cord and a socket-outlet or an appliance
142 outlet. They are intended for single-phase circuits for nominal currents not exceeding 16 A and for
143 nominal voltages not exceeding 250 V a.c.
144 The filtering functions are described in EN 50065-4-1.
145 This document does not cover phase couplers.
146 Portable decoupling filters are not used as part of the fixed installation, where EN 50065-4-2 applies.
147 Plugs and socket-outlets connected to the filter part and plugs and socket-outlets integrated with the filter
148 part are expected to comply with the relevant national standard(s).
149 Appliance inlets and appliance outlets connected to the filter part are expected to comply with the relevant
150 parts of the EN 60320 series. Appliance inlets and appliance outlets integrated with the filter parts are not
151 covered by this document.
152 This document can be used for portable mains communication devices when no other product standard
153 exists.
154 This document can be used for other portable mains filters other than those described in EN 50065-4-1
155 when no other product standard exists.
156 Filters including batteries are not covered by this document.
157 2 Normative references
158 The following documents are referred to in the text in such a way that some or all of their content
159 constitutes requirements of this document. For dated references, only the edition cited applies. For
160 undated references, the latest edition of the referenced document (including any amendments) applies.
161 EN 50065-4-1, Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz
162 - Part 4-1: Low voltage decoupling filters - Generic specification
163 EN 60065:2002, Audio/video, information and communication technology equipment - Part 1: Safety
164 requirements (IEC 60065:2001, mod)
165 EN 60068-2-30, Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
166 (IEC 60068-2-30)
167 EN 60068-2-32, Basic environmental testing procedures - Part 2: Tests - Test Ed: Free fall
168 (IEC 60068-2-32)
169 EN 60068-2-75, Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests (IEC 60068-2-75)
170 EN 60068-2-78, Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state
171 (IEC 60068-2-78)
172 EN 60112, Method for the determination of the proof and the comparative tracking indices of solid
173 insulating materials (IEC 60112)
174 EN 60127 (series), Miniature fuses (IEC 60127 series)
175 EN 60320 (series), Appliance couplers for household and similar general purposes (IEC 60320)
176 EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
prEN 50065-4-7:2021 (E)
177 EN IEC 60664-1, Insulation coordination for equipment within low-voltage systems – Part 1: Principles,
178 requirements and tests (IEC 60664-1)
179 EN 60664-3:2017, Insulation coordination for equipment within low-voltage systems - Part 3: Use of
180 coating, potting or moulding for protection against pollution (IEC 60664-3:2016)
181 EN 60695-2-11, Fire hazard testing - Part 2-11: Glowing/hot-wire based test methods - Glow-wire
182 flammability test method for end-products (GWEPT) (IEC 60695-2-11)
183 EN 60695-10-2, Fire hazard testing - Part 10-2: Abnormal heat - Ball pressure test method
184 (IEC 60695-10-2)
185 EN 60721-3-3, Classification of environmental conditions - Part 3: Classification of groups of
186 environmental parameters and their severities - Section 3: Stationary use at weatherprotected locations
187 (IEC 60721-3-3)
188 EN 60947-1:2007, Low-voltage switchgear and controlgear - Part 1: General rules (IEC 60947-1:2007)
189 EN 60999-1:2000, Connecting devices - Electrical copper conductors - Safety requirements for screw-
190 type and screwless-type clamping units - Part 1: General requirements and particular requirements for
2 2
191 clamping units for conductors from 0,2 mm up to 35 mm (included) (IEC 60999-1:1999)
192 EN 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques -
193 Electrical fast transient/burst immunity test (IEC 61000-4-4)
194 EN 132400, Sectional Specification: Fixed capacitors for electromagnetic interference suppression and
195 connection to the supply mains (Assessment level D)
196 HD 21 series, Cables of rated voltages up to and including 450/750 V and having thermoplastic insulation
197 (IEC 60227, mod)
198 HD 22 series, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation
199 (IEC 60245, mod)
200 IEC 60417, Graphical symbols for use on equipment
201 ISO 2081, Metallic and other inorganic coatings — Electroplated coatings of zinc with supplementary
202 treatments on iron or steel
203 ISO 1456, Metallic and other inorganic coatings — Electrodeposited coatings of nickel, nickel plus
204 chromium, copper plus nickel and of copper plus nickel plus chromium
205 ISO 2093, Electroplated coatings of tin — Specification and test methods
206 3 Definitions
207 For the purposes of this document, the following terms and definitions apply.
208 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
209 — ISO Online browsing platform: available at https://www.iso.org/obp
210 — IEC Electropedia: available at http://www.electropedia.org/
211 NOTE 1 Where the terms “voltage” and “current” are used, they imply r.m.s. values, unless otherwise specified.
212 NOTE 2 Throughout this document, the word “earthing” is used for “protective earthing”.
prEN 50065-4-7:2021 (E)
213 NOTE 3 The term “accessory” is used as a general term covering plugs and portable socket-outlets. The use of
214 the accessories is shown in IEC 60884-1:2002, Figure 1a.
215 3.1 Definitions (from IEC 60884-1) relating to plugs and socket-outlets
216 3.1.1
217 plug
218 accessory having pins designed to engage with the contacts of a socket-outlet, also incorporating means
219 for the electrical connection and mechanical retention of flexible cables or cords
220 3.1.2
221 socket-outlet
222 accessory having socket-contacts designed to engage with the pins of a plug and having terminals for the
223 connection of cable
224 3.1.3
225 portable socket-outlet
226 socket-outlet intended to be connected to, or integral with, flexible cables or cords, and which can easily
227 be moved from one place to another while connected to the supply
228 3.1.4
229 multiple socket-outlet
230 combination of two or more socket-outlets
231 3.1.5
232 rewirable plug
233 accessory so constructed that the flexible cable or cord can be replaced
234 3.1.6
235 non-rewirable plug
236 non-rewirable portable socket-outlet
237 accessory so constructed that it forms a complete unit with the flexible cable or cord after connection and
238 assembly by the manufacturer of the accessory
239 Note 1 to entry: See also IEC 60884-1:2002, 14.1.
240 3.1.7
241 moulded-on accessory
242 non-rewirable accessory, the manufacture of which is completed by insulating material moulded around
243 pre-assembled component parts and the terminations of the flexible cable or cord
244 3.1.8
245 cord extension set
246 assembly consisting of one flexible cable or cord fitted with one plug and one portable socket-outlet
247 3.1.9
248 terminal
249 insulated or non-insulated connecting device intended for reusable electrical connection of the external
250 conductors
251 3.1.10
252 termination
253 insulated or non-insulated connecting device intended for non-reusable electrical connection of the
254 external conductors
255 3.1.11
256 clamping unit of a terminal
257 part or parts of a terminal necessary for the mechanical clamping and the electrical connection of the
258 conductor(s)
prEN 50065-4-7:2021 (E)
259 3.1.12
260 adaptor
261 accessory constructed as an integral unit incorporating both plug pins and socket contacts
262 [SOURCE: IEC 60884-2-5]
263 3.2 Definitions related to decoupling filters
264 3.2.1
265 decoupling filter
266 device installed in an electrical network or installation in order to make possible reliable data transmission
267 over the low voltage mains network
268 3.2.2
269 intermediate adaptor
270 adaptor which has a decoupling filter incorporated
271 3.2.3
272 fault condition
273 abnormal condition which could occur during normal operation
274 3.2.4
275 screw-type terminal
276 clamping unit for the connection and subsequent disconnection of one conductor or the interconnection
277 and subsequent disconnection of two or more conductors, the connection being made, directly or
278 indirectly, by means of screws or nuts of any kind
279 3.2.5
280 nominal voltage
281 voltage assigned to the filter device by the manufacturer
282 3.2.6
283 nominal current
284 nominal maximum operating current assigned to the filter device by the manufacturer
285 3.3 Definitions from (EN 61140 and EN IEC 60664-1) related to insulation
286 3.3.1
287 basic insulation
288 insulation applied to live parts to provide basic protection against electric shock
289 3.3.2
290 supplementary insulation
291 independent insulation applied in addition to the basic insulation in order to provide protection against
292 electric shock in the event of a failure of the basic insulation (fault protection)
293 3.3.3
294 double insulation
295 insulation comprising both basic insulation and supplementary insulation
296 3.3.4
297 reinforced insulation
298 single insulation system applied to live parts which provides a degree of protection against electric shock
299 equivalent to double insulation
300 Note 1 to entry: The term “insulation system” does not imply that the insulation should be one homogeneous piece.
301 It may comprise several layers which cannot be tested separately as supplementary or basic insulation.
prEN 50065-4-7:2021 (E)
302 3.3.5
303 functional insulation
304 insulation between live parts which is necessary only for the proper functioning of the filter part
305 3.3.6
306 solid insulation
307 insulation material interposed between two conductive parts
308 Note 1 to entry: In the case of a printed board assembly with a coating, solid insulation consists of the printed board
309 itself as well as the coating. In other cases, solid insulation consists of the encapsulating material.
310 4 General requirements
311 The portable filter devices including its accessories shall be so designed and constructed that, in normal
312 use, their performance is reliable and without danger to the user or the surroundings.
313 In general, compliance is checked by carrying out all the tests specified, where applicable.
314 5 General notes on tests
315 5.1 General
316 Tests according to this document are type tests.
317 5.2 The samples are tested as delivered and under normal conditions of use, having regard to the
318 classification of the filter device and to the manufacturer's installation instructions.
319 5.3 Unless otherwise specified, the tests are carried out in the order of the clauses at an ambient
320 temperature of 20 °C ± 5 °C.
321 5.4 The required number of samples with filter portion shall be 9.
322 The number of samples with plug or socket-outlet parts shall be in accordance with the national
323 standard(s). The number of samples with appliance coupler parts shall be in accordance with the
324 EN 60320 series
325 Three samples are subjected to all the relevant tests, except the test of Clauses 27 and 28 where three
326 other samples are used, and the tests of Clauses 29 and 30 where another three samples are used.
327 5.5 Equipment is deemed not to comply with this document if any sample does not pass any of the
328 listed tests.
329 6 Rating
330 6.1 Rated value of nominal voltages are 230 V.
331 6.2 Rated values of nominal currents are 10 A, 13 A and 16 A.
332 For a filter accessory, the rated current of the socket-outlet part shall not be higher than the rated value of
333 the nominal current for the filter part and the plug part.
2 2 2
334 6.3 Rated cross-sectional areas of conductors are 0,75 mm , 1,0 mm and 1,5 mm .
335 Compliance with the requirements of 6.1 to 6.3 is checked by inspection of the marking and the
336 instruction sheet.
prEN 50065-4-7:2021 (E)
337 7 Classification of filter devices
338 7.1 According to protection against direct contact and external influences
339 The degrees of protection are based on EN 60529.
340 7.2 According to the degree of protection against ingress of water
341 The degrees of protection are based on EN 60529.
342 7.3 According to the type of connection
343 7.3.1 General
344 See Figure 1.
345 7.3.2 Intermediate adaptor
346 Filter incorporating one plug and one (multiple) socket-outlet.
347 7.3.3 Cord extension sets
348 7.3.3.1 The filter portion of which incorporates the plug at one end and one non-rewirable cord with
349 one portable (single or multiple) socket-outlet at the other end.
350 7.3.3.2 The filter portion with one non-rewirable cable in both ends with one plug and one socket-
351 outlet
352 7.3.3.3 The filter portion of which incorporates one portable (single or multiple) socket-outlet at one
353 end and a non-rewirable cord with one plug at the other end.
354 7.3.4 Filter plugs
355 7.3.4.1 Filter incorporating one plug and a set of terminals
356 7.3.4.2 The filter portion plug for appliances: Filter incorporating the plug and equipped with one non-
357 rewirable cord with or without one appliance coupler
358 7.3.5 In-line filters
359 7.3.5.1 Filter equipped, on the supply side, with one non-rewirable cord with one plug and, on the
360 output side, with a set of terminals
361 7.3.5.2 Filter for appliances equipped, on the supply side, with one non-rewirable cord and one non-
362 rewirable plug, and, on the output side, with one non-rewirable cord
363 7.3.5.3 Filter for appliances equipped, on the supply side, with one non-rewirable cord and one non-
364 rewirable plug, and, on the output side, with one non-rewirable cord with a appliance connector
365 7.3.5.4 The filter portion of which is equipped on both sides with terminals
366 7.3.5.5 The filter portion of which is equipped on both sides with one non-rewirable cord and with or
367 without on one side with an appliance inlet and on the other side with an appliance outlet
prEN 50065-4-7:2021 (E)
368 7.4 According to environmental temperature conditions
369 The classifications are based on EN 60721-3-3.
370 — class 3K4 + 5 °C to + 40 °C for indoor locations
371 — class 3K5 - 5 °C to + 45 °C for unprotected indoor locations
372 — class 3K6 - 25 °C to + 55 °C for outdoor locations
373 7.5 According to the rated impulse withstand voltage
374 The rated impulse withstand voltages are based on EN IEC 60664-1:
375 — 2 500 V according to overvoltage category II, for filter parts with normal reliability;
376 — 4 000 V according to overvoltage category III; for filter parts with high reliability.
377 8 Marking
378 8.1 Plug and socket outlet parts
379 For plug and socket outlet parts, marking shall be in accordance with the relevant national standards.
380 8.2 Filter parts
381 As a minimum the filter parts shall be marked on the outside as follows:
382 a) nominal voltage(s) in volts ~;
383 b) nominal current in amperes;
384 c) manufacturer's or responsible vendor's name, trade mark or identification mark;
385 d) type of decoupling filter and reference or catalogue number;
386 e) symbol for temperature range, if different from class 3K4;
387 f) symbol for degree of protection;
388 g) symbol for degree of protection against ingress of water.
389 8.3 Symbols
390 Symbols for marking shall be used as follows:
Amperes A
Volt V
Alternating current ~
Neutral N
Protective earth
Degree of protection, when relevant IPXX
391 The letter “X” shall be replaced by the relevant number.
prEN 50065-4-7:2021 (E)
392 The figure for the current rating shall be placed before or above that for the nominal voltage and
393 separated from the latter by an oblique line or a dash.
394 The marking for the nature of the supply shall be placed after and next to the marking for nominal current
395 and nominal voltage.
396 NOTE The marking for current, voltage and nature of supply could be, for instance, as follows: 16 A 230 V~ or
397 16/230~.
398 Compliance is checked by inspection.
399 8.4 Instruction sheets
400 An instruction sheet shall be provided with the following information when appropriate:
401 a) a statement concerning the national plug and socket-outlets system to which the portable decoupling
402 filter belongs;
403 b) adequate instructions for safe connection of any appropriate flexible cords, including references to
404 HD 21 series and HD 22 series, the number and colour of cores, the minimum and maximum cross-
405 sectional area of the conductors and the length, if necessary.
406 Compliance is checked by inspection.
407 8.5 Terminals
408 If it is necessary to distinguish between the supply and the load terminals, they shall be clearly marked
409 (e.g. by “line” and “load” placed near the corresponding terminals or by arrows indicating the direction of
410 power flow).
411 The letter ”N” shall indicate terminals exclusively intended for the connection of the neutral circuit.
412 Terminals intended for the protective conductor shall be indicated by the symbol  (IEC 60417-5019).
413 These markings shall not be placed on screws or any other easily removable parts.
414 NOTE “Easily removable parts” are those parts, which can be removed during the normal connection of the filter
415 device.
416 A marking scheme is given in Table 1.
417 Table 1 — Symbols for identification of the terminals
Single phase
Point of connection Identification
Line L
Neutral N
Earth
IEC 60417, symbol 5019
418 Terminals associated with any one pole shall have similar identification differing from that of the terminals
419 associated with the other poles, unless the relationship is self-evident.
420 Compliance is checked by inspection.
421 8.6 Durability
422 Marking shall be durable and easily legible.
423 Compliance is checked by inspection and by the following test.
prEN 50065-4-7:2021 (E)
424 The test is made by rubbing the marking by hand for 15 s with a piece of cloth soaked with water and
425 again for 15 s with a piece of cloth soaked with petroleum spirit.
426 Marking made by impression, moulding, pressing or engraving is not subjected to this test.
427 The petroleum spirit used should consist of a solvent hexane with a content of aromatics of maximum
428 0,1 % by volume, a value of 29 % for kauri-butanol, an initial boiling-point of approximately 65 °C, a dry-
429 point of approximately 69 °C and a density of approximately 0,68 g/cm .
430 The type reference may be marked with paint or ink, protected, if necessary, by varnish.
431 9 Dimensions
432 Plug and socket outlet parts shall comply with the appropriate national standard sheets.
433 Compliance is checked by inspection, by test, by measurement and by use of gauges according to the
434 appropriate national standards.
435 10 Protection against electric shock
436 10.1 For plug and socket outlet parts, tests shall be performed in accordance with the relevant national
437 standards.
438 The tests below apply to all other filter parts.
439 10.2 The filter devices shall be so designed that live parts are not accessible when the filter device is
440 mounted and wired as for normal use, even after removal of parts, which can be removed without the aid
441 of a tool.
442 For filter parts with plug without earth connection, this requirement applies also to contact with metal parts
443 separated from live parts by basic insulation only, or with basic insulation itself.
444 The test is carried out according to EN 60529, with the degree of protection IP2X.
445 During the test, live parts of the equipment shall not be accessible to the test finger.
446 11 Provision for protective earthing
447 11.1 For plug and socket parts, tests shall be performed in accordance with the relevant national
448 standards.
449 The filter shall be provided with a plug for class I equipment if tested in accordance with 10.3.2.
450 The tests below apply to all other filter parts.
451 11.2 Earthing terminals of rewirable filter devices shall comply with the appropriate requirements of
452 Clause 12.
453 They shall be of the same size as the corresponding terminals for the supply conductors.
454 11.3 Decoupling filters having more than one cable inlet shall be provided with an internal earthing
455 terminal allowing the connection of an incoming and outgoing conductor for the continuity of the earthing
456 circuit.
457 Compliance with the requirements of 11.2 and 11.3 is checked by inspection and by the tests of
458 Clause 12.
459 11.4 The connection between the earthing terminal and accessible metal parts to be connected thereto
460 shall be of low resistance.
461 Compliance is checked by the following test:
prEN 50065-4-7:2021 (E)
462 A current derived from an a.c. source having a no-load voltage not exceeding 12 V and equal to 1,5 times
463 nominal current or 25 A, whichever is greater is passed between the earthing terminal and each of the
464 accessible metal parts in turn.
465 The voltage drop between the earthing terminal and the accessible metal part is measured, and the
466 resistance calculated from the current and the voltage drop.
467 The resistance shall not exceed 0,05 Ω.
468 12 Terminals
469 12.1 Plug and socket outlet parts
470 For plug and socket parts, tests shall be performed in accordance with the relevant national standards.
471 The tests below apply to all other filter parts.
472 12.2 Rewirable filter devices
473 12.2.1 General
474 Rewirable filter devices shall be provided with terminals with screw clamping.
475 12.2.2 Terminals shall allow the conductor to be connected without special preparation.
476 12.2.3 Means for clamping the conductors in the termi
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