10 Protection against electric shock 10.1 For plug and socket outlet parts, tests shall be performed in accordance with the relevant national standards.. 11 Provision for protective ea
Trang 1Part 4-7: Portable low voltage
decoupling filters — Safety
requirements
ICS 31.160; 33.040.30; 97.120
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Trang 2This British Standard was
published under the authority
of the Standards Policy and
The start and finish of text introduced or altered by corrigendum is indicated
in the text by tags ˜™ Text altered by CENELEC corrigendum October
2006 is indicated in the text by ˆ‰
The UK participation in its preparation was entrusted to Technical Committee PEL/205, Mains signalling
A list of organizations represented on this committee can be obtained on request to its secretary
This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application
Compliance with a British Standard cannot confer immunity from legal obligations.
Amendments/corrigenda issued since publication
31 December 2007 See national foreword
Trang 3Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members
Safety requirements
Transmission de signaux sur les réseaux
électriques basse tension dans la bande
Teil 4-7: Bewegliche Entkopplungsfilter –
Niederspannungs-Sicherheitsanforderungen
This European Standard was approved by CENELEC on 2004-12-01 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
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member
This European Standard exists 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 Central Secretariat has the same status as the official versions
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom
Trang 4The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
– latest date by which the national standards conflicting
This safety standard EN 50065-4-7 has no frequency dependent content
It was originally conceived as a safety document within the EN 50065 set of standards, which have a frequency of 3 kHz to 148,5 kHz
When the scope of SC205A was extended to 30 MHz, SC 205A agreed that the scope of the published
safety standard, EN 50065-4-2, Low voltage decoupling filters - Safety requirements, should be amended
to include the band 1,6 MHz to 30 MHz in order to cover the additional set of standards for 1,6 MHz to
30 MHz This required no technical changes to the body of the document
In addition, it was agreed that Part 4-7, Portable low voltage decoupling filters - Safety requirements,
should also cover both frequency ranges For this reason the title of this part of EN 50065 covers the extended frequency ranges 3 kHz to 148,5 kHz and 1,6 MHz to 30 MHz
When certifying or making declaration of conformity to the Low Voltage Directive 73/23/EEC in order to
CE mark the device it is important to state that the CE marking is only valid for the filter parts of the product The plug parts and socket-outlets parts are not covered by the Low Voltage Directive and shall therefore comply with the relevant national standards
Structure of EN 50065 series:
Reference Title
EN 50065 Signalling on low voltage electrical installations in the frequency range 3 kHz to 148,5 kHz
EN 50065-1 Part 1: General requirements, frequency bands and electromagnetic disturbances
EN 50065-2-1 Part 2-1: Immunity requirements for mains communications equipment and systems
operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in residential, commercial and light industrial environments
EN 50065-2-2 Part 2-2: Immunity requirements for mains communications equipment and systems
operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments
EN 50065-2-3 Part 2-3: Immunity requirements for mains communications equipment and systems
operating in the range of frequencies 3 kHz to 95 kHz and intended for use by electricity suppliers and distributors
EN 50065-4-1 Part 4-1: Low voltage decoupling filters - Generic specification
EN 50065-4-2 Part 4-2: Low voltage decoupling filters - Safety requirements
EN 50065-4-3 Part 4-3: Low voltage decoupling filters - Incoming filter
EN 50065-4-4 Part 4-4: Low voltage decoupling filters - Impedance filter
EN 50065-4-5 Part 4-5: Low voltage decoupling filters - Segmentation filter
EN 50065-4-6 Part 4-6: Low voltage decoupling filters - Phase coupler
EN 50065-4-7 Part 4-7: Low voltage decoupling filters - Safety requirements
EN 50065-7 Part 7: Equipment impedance
The contents of the corrigendum of October 2006 have been included in this copy
Trang 5Contents
1 Scope 5
2 Normative references 5
3 Definitions 6
4 General requirements 9
5 General notes on tests 9
6 Rating 9
7 Classification 10
8 Marking 11
9 Dimensions 13
10 Protection against electric shock 13
11 Provision for protective earthing 14
12 Terminals 15
13 Construction 15
14 Resistance to ageing, protection provided by enclosures, and resistance to humidity 18
15 Insulation resistance and dielectric strength 20
16 Temperature rise 21
17 Breaking capacity 23
18 Normal operation 23
19 Force necessary to withdraw the plug 23
20 Flexible cables and their connections 23
21 Mechanical strength 26
22 Resistance to heat 27
23 Screws, current-carrying parts and connections 28
24 Creepage distances and clearances 30
25 Resistance to abnormal heat, to fire and to tracking 34
26 Resistance to rusting 36
27 Components 36
28 Abnormal conditions 38
29 Protection against short-circuit 39
30 Resistance to transients 40
Annex A (normative) Pollution degrees 45
Annex B (normative) Proof tracking test 46
Annex C (normative) Types of coatings for rigid printed board assemblies 47
Annex D (normative) Special national conditions 48
Trang 6Table 1 – Symbols for identification of the terminals 12
Table 2 – Connectable cross-sections of copper conductors 15
Table 3 – Minimum insulation resistances 20
Table 4 – Dielectric strength 21
Table 5 – Test current 21
Table 6 – Permissible temperature rise maximum temperatures 22
Table 7 – Make-up of cables suitable for the retention test of rewirable filter devices 23
Table 8 – Minimum cross-sectional area for cables for non-rewirable filter devices 24
Table 9 – Minimum clearances for basic insulation 31
Table 10 – Minimum creepage distances for basic insulation 32
Table 11 – Minimum creepage distances for functional insulation 33
Table 12 – Test levels and conditions 34
Figure 1 – Examples of types of connection classified according to 7.3 41
Figure 2 – Apparatus for testing the cord retention (20.2) 42
Figure 3 – Apparatus for flexing test (20.3.2) 43
Figure 4 – Apparatus for impact test at low temperature (21.2.3) 44
Trang 71 Scope
This European product safety standard applies to the filter part of portable devices for household and similar uses (hereafter referred to as portable decoupling filters) consisting of the filter part, a plug or an appliance inlet or a provision for connection by terminals or with a non-rewirable cord and one (multiple) socket-outlet or an appliance outlet They are intended for single-phase circuits for nominal currents not exceeding 16 A and for nominal voltages not exceeding 250 V a.c to neutral operating in the frequency range 3 kHz to 148,5 kHz and from 1,6 MHz to 30 MHz
The filtering functions are described in EN 50065-4-1
This standard does not cover phase couplers
Portable decoupling filters shall not be used as part of the fixed installation, where EN 50065-4-2 applies Plugs and socket-outlets connected to the filter part and plugs and socket-outlets integrated with the filter part shall comply with the relevant national standard(s)
Appliance inlets and appliance outlets connected to the filter part shall comply with the relevant parts of the EN 60320 series Appliance inlets and appliance outlets integrated with the filter parts are not covered
EN 60065 2002 Audio, video and similar electronic apparatus – Safety requirements
(IEC 60065:2001, mod)
EN 60068-2-32 Environmental testing – Part 2: Tests – Test Ed: Free fall (IEC 60068-2-32)
EN 60068-2-75 Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
(IEC 60068-2-75)
EN 60112 2003 Method for the determination of the proof and the comparative tracking indices
of solid insulating materials (IEC 60112:2003)
EN 60127 Series Miniature fuses (IEC 60127)
EN 60320 Series Appliance couplers for household and similar general purposes (IEC 60320)
EN 60529 Degrees of protection provided by enclosures (IP code) (IEC 60529)
EN 60664-1 2003 Insulation coordination for equipment within low-voltage systems –
Part 1: Principles, requirements and tests (IEC 60664-1:1992 + A1:2000 + A2:2002)
EN 60664-3 Insulation coordination for equipment within low-voltage systems –
Part 3: Use of coating, potting or moulding for protection against pollution (IEC 60664-3)
Trang 8EN 60695-2-11 Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (IEC 60695-2-11)
EN 60695-10-2 Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
(IEC 60695-10-2)
EN 60721-3-3 Classification of environmental conditions – Part 3: Classification of groups of
environmental parameters and their severity’s – Section 3: Stationary use at weather protected locations (IEC 60721-3-3)
EN 60893-1 Insulating materials - Industrial rigid laminated sheets based on thermosetting
resins for electrical purposes - Part 1: Definitions, designations and general requirements (IEC 60893-1)
EN 60999-1 2000 Connecting devices - Electrical copper conductors - Safety requirements for
screw-type and screwless-type clamping units – Part 1: General requirements and particular requirements for clamping units for conductors from 0,2 mm' up
EN 61180-1 High-voltage test techniques for low-voltage equipment – Part 1: Definitions,
test and procedure requirements (IEC 61180-1)
EN 61180-2 High-voltage test techniques for low-voltage equipment – Part 2:Test equipment
(IEC 61180-2)
EN 132400 Sectional Specification: Fixed capacitors for electromagnetic interference
suppression and connection to the supply mains (Assessment level D)
HD 21 Series Cables of rated voltages up to and including 450/750 V and having
thermoplastic insulation (IEC 60227, mod)
HD 22 Series Cables of rated voltages up to and including 450/750 V and having cross-linked
insulation (IEC 60245, mod) IEC 60085 Thermal evaluation and classification of electrical insulation
IEC 60417, database Graphical symbols for use on equipment
IEC 60884-1 2002 Plugs and socket-outlets for household and similar purposes - Part 1: General
requirements IEC 60884-2-5 1995 Plugs and socket-outlets for household and similar purposes - Part 2: Particular
requirements for adaptors
3 Definitions
For the purpose of this CENELEC standard, the following definitions apply
Where the terms "voltage" and "current" are used, they imply r.m.s values, unless otherwise specified Throughout this standard, the word "earthing" is used for "protective earthing"
The term "accessory" is used as a general term covering plugs and portable socket-outlets The use of the accessories is shown in Figure 1a of IEC 60884-1
Text deleted
ˆ
‰
Trang 93.1 Definitions (from IEC 60884-1) relating to plugs and socket-outlets
socket-outlet intended to be connected to, or integral with, flexible cables or cords, and which can easily
be moved from one place to another while connected to the supply
non-rewirable plug or a non-rewirable portable socket-outlet
accessory so constructed that it forms a complete unit with the flexible cable or cord after connection and assembly by the manufacturer of the accessory (see also 14.1 of IEC 60884-1)
cord extension set
assembly consisting of one flexible cable or cord fitted with one plug and one portable socket-outlet
clamping unit of a terminal
part or parts of a terminal necessary for the mechanical clamping and the electrical connection of the conductor(s)
3.1.12
adaptor
accessory constructed as an integral unit incorporating both plug pins and socket contacts
(IEC 60884-2-5)
Trang 103.2 Definitions related to decoupling filters
the nominal maximum operating current assigned to the filter device by the manufacturer
3.3 Definitions from (EN 61140 and EN 60664-1) related to insulation
insulation material interposed between two conductive parts
NOTE In the case of a printed board assembly with a coating, solid insulation consists of the printed board itself as well as the coating In other cases, solid insulation consists of the encapsulating material
Trang 114 General requirements
The portable filter devices including its accessories shall be so designed and constructed that, in normal use, their performance is reliable and without danger to the user or the surroundings
In general, compliance is checked by carrying out all the tests specified, where applicable
5 General notes on tests
Tests according to this standard are type tests
5.1 The samples are tested as delivered and under normal conditions of use, having regard to the
classification of the filter device and to the manufacturer's installation instructions
5.2 Unless otherwise specified, the tests are carried out in the order of the clauses at an ambient temperature of 20 °C ± 5 °C
5.3 The required number of samples with filter portion shall be 9
NOTE The number of samples with plug or socket-outlet parts shall be in accordance with the national standard(s) The number of samples with appliance coupler parts shall be in accordance with the EN 60320 standard(s)
Three samples are subjected to all the relevant tests, except the test of Clauses 27 and 28 where three other samples are used, and the tests of Clauses 29 and 30 where another three samples are used
5.4 Filter device is deemed not to comply with this standard if any sample does not pass the tests of 25.1, 25.2, Clauses 29 and 30, and if there are more failures than that of one sample in any of the other
tests
If no sample has failed during the tests of 25.1, 25.2, Clauses 29 and 30, but one sample has failed in another way during any of the other tests, the test which caused the failure and those preceding which may have influenced the result of that test, are repeated on another set of samples, as specified in 5.4, all
of which shall then comply with the repeated tests
NOTE 1 In general, it will be necessary only to repeat the test that caused the failure, unless the sample fails in the mechanical strength test of Clause 21, in which case the ageing test of Clause 14 is repeated
NOTE 2 The applicant may submit, together with the number of samples specified in 5.3, the additional set of samples, which may
be required, should one sample fail The testing laboratory will then, without further request, test the additional samples and will reject only if a further failure occurs If the additional set of samples is not submitted at the same time, a failure of one sample will entail a rejection
6 Rating
6.1 Rated value of nominal voltages are 230 V
6.2 Rated values of nominal currents are 10 A, 13 A and 16 A
For a filter accessory, the rated current of the socket-outlet part shall not be higher than the rated value of the nominal current for the filter part and the plug part
6.3 Rated cross-sectional areas of conductors are 0,75 mm², 1,0 mm² and 1,5 mm²
Compliance with the requirements of 6.1 to 6.3 is checked by inspection of the marking and the instruction sheet
Trang 127 Classification of filter devices
7.1 According to protection against direct contact and external influences
The degrees of protection are based on EN 60529
7.2 According to the degree of protection against ingress of water
The degrees of protection are based on EN 60529
7.3 According to the type of connection
See Figure 1
7.3.1 Intermediate adaptor
Filter incorporating one plug and one (multiple) socket-outlet
7.3.2 Cord extension sets
7.3.2.1 The filter portion of which incorporates the plug at one end and one non-rewirable cord with one portable (single or multiple) socket-outlet at the other end
7.3.2.2 The filter portion with one non-rewirable cable in both ends with one plug and one socket-outlet 7.3.2.3 The filter portion of which incorporates one portable (single or multiple) socket-outlet at one end and a non-rewirable cord with one plug at the other end
7.3.3 Filter plugs
7.3.3.1 Filter incorporating one plug and a set of terminals
7.3.3.2 The filter portion plug for appliances: Filter incorporating the plug and equipped with one rewirable cord with or without one appliance coupler
non-7.3.4.4 The filter portion of which is equipped on both sides with terminals
7.3.4.5 The filter portion of which is equipped on both sides with one non-rewirable cord and with or without on one side with an appliance inlet and on the other side with an appliance outlet
7.4 According to environmental temperature conditions
The classifications are based on EN 60721-3-3
Trang 137.5 According to the rated impulse withstand voltage
The rated impulse withstand voltages are based on EN 60664-1:
– 2 500 V according to overvoltage category II, for filter parts with normal reliability;
– 4 000 V according to overvoltage category III; for filter parts with high reliability
8 Marking
8.1 Plug and socket outlet parts
For plug and socket outlet parts, marking shall be in accordance with the relevant national standards
As a minimum the filter parts shall be marked on the outside as follows:
a) nominal voltage(s) in volts ~;
b) nominal current in amperes;
c) manufacturer's or responsible vendor's name, trade mark or identification mark;
d) type of filter and reference or catalogue number;
e) symbol for temperature range, if different from class 3K4;
f) symbol for degree of protection, if higher than IP4X;
g) symbol for degree of protection against ingress of water, if higher than IPX0 In such case the symbol
for degree of protection against harmful ingress of solid foreign bodies shall also be marked, even if
not higher than IP4X
The letter “X” shall be replaced by the relevant number
The figure for the current rating shall be placed before or above that for the nominal voltage and
separated from the latter by an oblique line or a dash
The marking for the nature of the supply shall be placed after and next to the marking for nominal current
and nominal voltage
NOTE The marking for current, voltage and nature of supply may be, for instance, as follows: 16 A 230 V~ or 16/230~
Compliance is checked by inspection
Trang 148.4 Instruction sheets
An instruction sheet shall be provided with the following information when appropriate:
a) a statement concerning the national plug and socket-outlets system to which the portable decoupling filter belongs;
b) adequate instructions for safe connection of any appropriate flexible cords, including references to
HD 21 and HD 22, the number and colour of cores, the minimum and maximum cross-sectional area
of the conductors and the length, if necessary
Compliance is checked by inspection
8.5 Terminals
If it is necessary to distinguish between the supply and the load terminals, they shall be clearly marked (e.g by "line" and "load" placed near the corresponding terminals or by arrows indicating the direction of power flow)
The letter ”N” shall indicate terminals exclusively intended for the connection of the neutral circuit
Terminals intended for the protective conductor shall be indicated by the symbol (IEC 60417-5019) These markings shall not be placed on screws or any other easily removable parts
NOTE "Easily removable parts" are those parts, which can be removed during the normal connection of the filter device
A marking scheme is given in Table 1
Table 1 – Symbols for identification of the terminals
Single phase
Line L Neutral N Earth
Marking shall be durable and easily legible
Compliance is checked by inspection and by the following test
The test is made by rubbing the marking by hand for 15 s with a piece of cloth soaked with water and again for 15 s with a piece of cloth soaked with petroleum spirit
Marking made by impression, moulding, pressing or engraving is not subjected to this test
NOTE 1 The petroleum spirit used should consist of a solvent hexane with a content of aromatics of maximum 0,1 % by volume, a value of 29 % for kauri-butanol, an initial boiling-point of approximately 65 °C, a dry-point of approximately 69 °C and a density of approximately 0,68 g/cm³
NOTE 2 The type reference may be marked with paint or ink, protected, if necessary, by varnish
Trang 159 Dimensions
Plug and socket outlet parts shall comply with the appropriate national standard sheets
Compliance is checked by inspection, by test, by measurement and by use of gauges according to the appropriate national standards
10 Protection against electric shock
10.1 For plug and socket outlet parts, tests shall be performed in accordance with the relevant national
standards
The tests below apply to all other filter parts
10.2 The filter devices shall be so designed that live parts are not accessible when the filter device is
mounted and wired as for normal use, even after removal of parts, which can be removed without the aid
of a tool
For filter parts with plug without earth connection, this requirement applies also to contact with metal parts separated from live parts by basic insulation only, or with basic insulation itself
Compliance is checked by inspection and, if necessary, by the following tests
The sample is connected as in normal use and fitted with conductors of the smallest cross-sectional area specified in Clause 12 The test is repeated using conductors of the largest cross-sectional area specified
in Clause 12
The standard test finger specified in EN 60529 is applied to the sample in every possible position, an electrical indicator, with a voltage not less than 40 V and not more than 50 V, being used to show contact with the relevant live parts
The insulating properties of lacquer, enamel, paper, cotton, oxide film on metal parts, beads and sealing compounds which soften in heat shall not be relied upon to give the required protection against contact with live parts
Openings in insulating material and in unearthed metal parts are tested with the test probe 13 according
to EN 61032 The test probe shall without force in every possible position not touch live parts
Devices, having enclosures or covers in thermoplastic or elastomeric material, is subjected to the following additional test, which is carried out at an ambient temperature according to the maximal temperature specified under the environmental classification ± 2 °C
The devices shall be connected as in normal use at this temperature and preheated with the nominal current and voltage connected for at least one hour
During this additional test, the filter device is subjected for 1 min to a force of 75 N, applied through the tip
of a straight unjointed test finger of the same dimensions as the standard test finger
This test finger, with an electrical indicator as described above, is applied to all places where yielding of insulating material could impair the safety of the filter device
During this test, the filter device with its associated mounting means shall not deform to such an extent that live parts can be touched by the unjointed test finger
10.3 Accessible parts shall be of reinforced or double insulated solid insulation with the exception of
small screws and the like which are isolated from live parts and which are used for fixing cover plates
However accessible parts may be made of metal if the requirements of either 10.3.1 or 10.3.2 are fulfilled
Trang 1610.3.1 Covers or cover plates shall be double or reinforced insulated from live parts and the reinforced
or supplementary insulation, shall be made by insulating linings or insulating barriers fixed to the covers
or cover plates, or to the body of the filter device in such a way that this supplementary solid insulation:
− cannot be removed without being permanently damaged, or
− is so designed that it cannot be replaced in an incorrect position and that, if omitted the filter device is rendered inoperable or manifestly incomplete There shall be no
− risk of accidental connection between live parts and metal covers or cover plates, for example through their fixing screws, even if a conductor should come away from its terminal,
− risk of a reduction of creepage distances or clearances below the values specified in Clause 24 10.3.2 Accessible conductive parts, which are not double or reinforced insulated from live parts by using reinforced or supplementary solid insulation, shall have basic insulation against live parts and be permanently and reliably connected to the protective earth terminal
Compliance with 10.3, 10.3.1 or 10.3.2 is checked by inspection and with the tests of Clauses 15 and 24 For 10.3.2 the additional requirements in Clause 11 shall be tested
10.3.3 Filters containing capacitors in excess of 0,1 µF connected between line conductors the voltage resulting from static charges shall fall below 120 V d.c in less than 5 s after disconnection from the power supply
Compliance with 10.3.3 is done by a test
11 Provision for protective earthing
11.1 For plug and socket parts, tests shall be performed in accordance with the relevant national
standards
The filter shall be provided with a plug for class I equipment if tested in accordance with 10.3.2
The tests below apply to all other filter parts
11.2 Earthing terminals of rewirable filter devices shall comply with the appropriate requirements of
Clause 12
They shall be of the same size as the corresponding terminals for the supply conductors
11.3 Decoupling filters having more than one cable inlet shall be provided with an internal earthing
terminal allowing the connection of an incoming and outgoing conductor for the continuity of the earthing
circuit
Compliance with the requirements of 11.2 and 11.3 is checked by inspection and by the tests of Clause 12
11.4 The connection between the earthing terminal and accessible metal parts to be connected thereto
shall be of low resistance
Compliance is checked by the following test:
A current derived from an a.c source having a no-load voltage not exceeding 12 V and equal to 1,5 times nominal current or 25 A, whichever is greater is passed between the earthing terminal and each of the accessible metal parts in turn
The voltage drop between the earthing terminal and the accessible metal part is measured, and the resistance calculated from the current and the voltage drop
The resistance shall not exceed 0,05 Ω
Trang 1712 Terminals
12.1 Plug and socket outlet parts
For plug and socket parts, tests shall be performed in accordance with the relevant national standards The tests below apply to all other filter parts
12.2 Rewirable filter devices
Rewirable filter devices shall be provided with terminals with screw clamping
12.2.1 Terminals shall allow the conductor to be connected without special preparation
12.2.2 Means for clamping the conductors in the terminals shall not serve to fix any other component, although they may hold the terminals in place or prevent them from turning
Compliance with 12.2.1 to 12.2.2 is checked by inspection and shall comply with EN 60999-1 All the tests shall be with the terminals mounted in the filter device
The terminals shall be tested with the cross-sectional area of conductors given in Table 2
Table 2 – Connectable cross-sections of copper conductors Ranges of nominal current
A
Flexible conductor and cross-sectional area
mm²
Up to and including 16 A 0,75 to 1,5
In addition to Subclauses 9.5 and 9.6 of EN 60999-1:
“During the test the terminals shall not work loose from their fixings to the filter device.”
Subclauses 8.16 and 9.9 of EN 60999-1 are not applicable
The test current in Subclause 9.10 of EN 60999-1 shall be according to Table 5 in Clause 16 in this standard
13 Construction
13.1 Plug and socket outlet parts
Plug and socket parts shall be in accordance with the relevant national standards
The tests below apply to all other filter parts
13.2 Filter parts
The filter devices shall be so designed and constructed that in normal use their performance is reliable and without danger to the user or surroundings, even in case of fault of the supply voltage
The earthing circuit PE within the filter device shall be continuous
The filter part shall be in one unit and its correct operation shall not depend on the location of the flexible cables and cords connected to it and shall have a minimum degree of protection IP4X after assembly as for normal use (see 14.3.2.1)
For filter devices the green-yellow conductor shall be used as the PE conductor
Compliance is checked by inspection and the relevant clauses
Trang 1813.3 Non-rewirable filter parts
A non-rewirable part of a filter device shall be such that
– the flexible cable or cord cannot be separated from that part without making the filter device permanently inoperable
– the part cannot be opened by hand or by using a general purpose tool, for example a screwdriver used as such
NOTE A filter device is considered to be permanently inoperable in normal condition, when parts or materials other than the original ones have to be used for re-assembling
Compliance is checked by inspection
13.4 Rewirable filter parts
13.4.1 The enclosure of rewirable filter parts shall completely enclose the terminals and the ends of flexible cables and cords
Compliance is checked by inspection
13.4.2 Terminals of filter devices shall be so located or shielded that they do not create a dangerous situation The construction of rewirable accessories shall be such that the conductors can be properly connected and that, when the accessory is wired and assembled as for normal use, there is no risk that – the conductors are pressed against each other;
– a core, the conductor of which is connected to a live terminal, comes into contact with accessible metal parts;
– a core, the conductor of which is connected to the earthing terminal, comes into contact with live parts
Compliance is checked by inspection and the following test:
An 8 mm length of insulation is removed from the end of a flexible conductor having the nominal sectional area specified in Table 2 One wire of the stranded conductor is left free and the remaining wires are fully inserted into the terminal and clamped as for normal use
cross-The free wire is bent, without tearing and pulling back the insulation, in every possible direction but without making sharp bends around barriers
The free wire of a conductor connected to a live terminal shall not touch any accessible metal part or be able to emerge from the enclosure when the accessory has been assembled
The free wire of a conductor connected to an earthing terminal shall not touch a live part
If necessary, the test is repeated with the free wire in another position
The prohibition against making sharp bends around barriers does not imply that the free wire shall be kept straight during the test Moreover, sharp bends are made if it is considered likely that such bends can occur during the normal assembly of the plug or portable socket-outlet, for example when a cover is pushed on
13.4.3 The rewirable filter part shall be so designed that terminal screws or nuts cannot become loose and fall out of position in such a way that they establish an electrical connection between live parts and the earthing terminal or metal parts connected to the earthing terminal
Compliance is checked by inspection and by manual test
Trang 1913.4.4 The rewirable filter part shall be designed with ample space for slack of the earthing conductor in such a way that, if the strain relief should fail, the connection of the earthing conductor is subjected to strain after the connections of the current-carrying conductors and that, in case of excessive stresses, the earthing conductor will break after the current-carrying conductors
Compliance is checked by the following test:
The flexible cable or cord is connected to the filter device in such a way that the current-carrying conductors are led from the strain relief to the corresponding terminals along the shortest possible path After they are connected, the core of the earthing conductor of the maximal cross-section according to Table 2 is led to its terminal and cut off at a distance 8 mm longer than necessary for its correct connection
The earthing conductor is then connected to the terminal as well It shall then be possible to house the loop, which is formed by the earthing conductor owing to its surplus length, freely in the wiring space without squeezing or pressing the core when the shell or cap of the filter device is remounted and fixed correctly
13.4.5 For rewirable filter parts:
– it shall be clear how the relief from strain and the prevention of twisting is intended to be effected; – inlet openings for flexible external cords shall be so designed and shaped, or shall be provided with a inlet bushing, so that the covering of the cord can be introduced without risk of damage;
– the cord anchorage, or at least part of it, shall be integral with or permanently fixed to one of the component parts of the filter part;
– makeshift methods, such as tying the cable or cord in a knot or tying the ends with string, shall not
be used;
– cord anchorages shall be suitable for the different types of flexible cable or cord which may be connected, and their effectiveness shall not depend upon the assembly of the parts of the body; – cord anchorages shall be of insulating material or be provided with an insulating lining fixed to the metal parts;
– metal parts of the cord anchorage, including clamping screws, shall be insulated from the earthing circuit
Compliance is checked by inspection
If covers of filter devices are provided with bushes for the entry holes for the pins, these bushes shall not
be allowed to be removed from the outside or to become detached inadvertently from the inside, when the cover is removed
Compliance is checked by inspection
Screws intended to allow access to the interior of the accessory shall be captive
Trang 20NOTE The use of tight-fitting washers of cardboard or the like is deemed to be an adequate method for securing screws, which are
to be captive
Compliance is checked by inspection
14 Resistance to ageing, protection provided by enclosures, and resistance to humidity
14.1 Plug and socket outlet parts
For plug and socket parts, tests shall be performed in accordance with the relevant national standards The tests below apply to all other filter parts
14.2 Resistance to ageing
The filter devices shall be resistant to ageing
Compliance is checked by the following test:
The filter device, complete with enclosure, and mounted as for normal use, is subjected to a test in a heating cabinet with an atmosphere having the composition and pressure of the ambient air and ventilated by natural circulation
The filter device, which is required to be marked with degree of protection, shall be tested after having been connected as delivered or as specified in 13.4.4
The temperature of the cabinet is 70 °C ± 2 °C
The samples are kept in the cabinet for 7 days (168 h)
The use of an electrically heated cabinet is recommended
Natural circulation may be provided by holes in the walls of the cabinet
After the treatment, the samples are removed from the cabinet and kept at room temperature and relative humidity between 45 % and 55 % for at least 4 days (96 h)
The samples shall show no crack visible to the naked eye, nor shall the material have become sticky or greasy, this being judged as follows:
With the forefinger wrapped in a dry piece of rough cloth the sample is pressed with a force of 5 N
No traces of the cloth shall remain on the sample and the material of the sample shall not stick to the cloth
After the test the samples shall show no damage that could impair compliance with this standard
NOTE The force of 5 N can be obtained in the following way: The sample is placed on one of the pans of a balance and the other pan is loaded with a mass equal to the mass of the sample plus 500 g Equilibrium is then restored by pressing the sample with the forefinger wrapped in a dry piece of rough cloth
14.3 Protection provided by enclosures
14.3.1 General
The enclosure of filter device shall provide protection against access to hazardous parts, harmful effects due to ingress of solid foreign objects and against harmful effects due to ingress of water in accordance with the IP classification of the filter device
Compliance is checked by the appropriate test specified below
NOTE The tests are based on EN 60529
Trang 2114.3.2 Protection against access to hazardous parts and against harmful effects due to ingress of solid
foreign objects
Parts which can be removed without the aid of a tool are removed
Compliance is checked by test in 14.3.2.1 and 14.3.2.2
14.3.2.1 Protection against access to hazardous parts
The appropriate test according to EN 60529 is performed with a minimum degree of protection IP4X as required in 13.2
14.3.2.2 Protection against harmful effects due to ingress of solid foreign objects
The appropriate test according to EN 60529 is performed
14.3.3 Protection against harmful effects due to ingress of water
The appropriate test according to EN 60529 is performed
Immediately after the tests specified in 14.3.2, the samples shall withstand an electric strength test as specified in Clause 15 and inspection shall show that water has not entered the samples to any appreciable extent and has not reached live parts
14.4 Resistance to humidity
Filter devices shall be resistant to the humid conditions which may occur in normal use
Compliance is checked by the humidity test described in this subclause, followed immediately by the measurement of the insulation resistance and by the electric field strength test specified in Clause 15
Inlet openings, if any, are left open; if knock-outs are provided, one of them is opened
Parts which can be removed without the aid of a tool, are removed and subjected to the humidity treatment with the main part; spring lids are open during this treatment
The humidity treatment is carried out in a humidity cabinet containing air with a relative humidity maintained between 91 % and 95 %
The temperature of the air in which the samples are placed is maintained within ± 1 °C of any convenient value between 20 °C and 30 °C
Before being placed in the humidity cabinet, the samples are brought to a temperature between
T (ambient temperature) and T + 4 °C
The samples are kept in the cabinet for:
2 days (48 h) For filter devices with degree of protection IP20;
7 days (168 h) For filter devices other than IP20
NOTE 1 In most cases, the samples may be brought to the specified temperature by keeping them at this temperature for at least
4 h before the humidity treatment
NOTE 2 A relative humidity between 91 % and 95 % can be obtained by placing in the humidity cabinet a saturated solution of sodium sulphate (Na2SO4) or potassium nitrate (KNO3) in water having a sufficiently large contact surface with the air
NOTE 3 In order to achieve the specified conditions within the cabinet, it is necessary to ensure constant circulation of the air within and, in general, to use a thermally insulated cabinet
After this test, the samples shall show no damage within the meaning of this standard
Trang 2215 Insulation resistance and dielectric strength
15.1 Plug and socket outlet parts
For plug and socket parts, tests shall be performed in accordance with the relevant national standards
The tests below apply to all other filter parts
15.2 Filter parts
The insulation resistance and the dielectric strength of filter devices shall be adequate
Compliance is checked by the tests of 15.2.1 and 15.2.2, these tests being made immediately after the test of 14.4
The test voltage according to Table 4 is applied in the case of:
– basic insulation: between all live parts connected together and a metal foil covering the outer accessible surface of the basic insulation and accessible metal parts in contact with the basic insulation;
– double insulation: between all live parts connected together and a metal foil covering the outer, normally not accessible surface of basic insulation and non-accessible metal parts; and following this: between two metal foils covering separately the inner, normally not accessible surface of supplementary insulation and connected to non-accessible metal parts, and the outer, accessible surface of supplementary insulation and connected to accessible metal parts;
– reinforced insulation: between all live parts connected together and a metal foil covering the outer accessible surface of reinforced insulation and accessible metal parts
The foils are not pressed into openings but are pushed into corners and the like by means of the standard test finger
In cases where basic insulation and supplementary insulation cannot be tested separately, the insulation provided is subjected to the test voltages specified for reinforced insulation
15.2.1 The insulation resistance is measured with a d.c voltage of approximately 500 V applied, the measurement being made 1 min after application of the voltage
The insulation resistance shall not be less than specified in Table 3
Electronic components connected between live parts of different polarity should be disconnected for the test
Table 3 – Minimum insulation resistances
MΩ
Basic Supplementary Reinforced
15.2.2 The insulation is subjected to a voltage of substantially sine wave form, having a frequency of
50 Hz or 60 Hz The test voltage shall be raised uniformly from 0 V to the value specified in Table 4 within not more than 5 s and held at that value for 5 s
No flashover or breakdown shall occur Glow discharges without drop in voltage are neglected
Trang 23Table 4 – Dielectric strength
V
Basic Supplementary Reinforced
NOTE 2 For the test of basic, supplementary and reinforced insulation, all live parts are connected together and care is taken to ensure that all moving parts are in the most onerous position
NOTE 3 For filter devices incorporated reinforced insulation as well as double insulation care is taken that the voltage applied to the reinforced insulation does not overstress the basic or the supplementary parts of the double insulation
NOTE 4 For basic and supplementary insulation the values are calculated with the formula: U N + 1200 V and rounded
16.1 Plug and socket outlet parts
For plug and socket parts, tests shall be performed in accordance with the relevant national standards
The tests below apply to all other filter parts
16.2 Filter parts
The filter devices shall be so constructed that the temperature rise in normal and abnormal use is not
excessive
Compliance is checked by inspection and by the following test
The filter device is connected as in normal use and as specified in Table 3, the terminal screws or nuts being tightened with a torque equal to two-thirds of that specified in Table 4 of EN 60999-1
The conductors connected to the terminals shall have a length of at least 1 m
Parts of the filter device, through which the load current is passing, are loaded with alternating current having the value shown in Table 5 Parts with no load current passing are loaded with 1,1 times the nominal voltage for the relevant part
In normal use the temperature rise is measured when the steady-state temperature has been reached, but not later than within 4 h of operation
Table 5 – Test current Cross-sectional area of
The temperature is determined by means of melting particles, colour changing indicators or thermocouples, so chosen and positioned that they have negligible effect on the temperature being determined
Trang 24The temperature rise under normal use and abnormal conditions according Clause 28 shall not exceed
the values given in Table 6, where Tmax is the maximum ambient temperature according to 7.4
The temperature rise measured on components and insulating material added to Tmax shall not exceed
the limits for their maximum working temperature and shall be in accordance with Table 6
During the test the temperature rises necessary to perform the tests of 22.2.2 and 22.2.3 shall be
determined
Table 6 – Permissible temperature rise maximum temperatures
Terminals and parts which may come into contact with cable
Maximum temperature °C
Rubber or polyvinyl chloride insulation of non-detachable
cables and cords:
Rubber other than synthetic, used for gaskets or other parts,
the deterioration of which could affect safety:
- when used as supplementary insulation or as reinforced
Material used as insulation other than that specified for wires:
Windings with thermal classification f:
a This limit applies to cables, cords and wires complying with the relevant HD standards; for others it may be different
b This limit will become applicable as soon as there are EN/HD or IEC standards for high temperature cables, cords and wires
c The material shall be according to IEC 60893-1 The maximum permissible temperature shall not exceed values, which can
be proved to be safe in service for the materials in question
d There is no specific limit The material shall withstand the test of Clause 25, for which purpose the temperature shall be
measured
e The permissible temperature rises at the inside of enclosures of insulating material are those indicated for the relevant
materials
f The thermal classification is the thermal class according to IEC 60085 with the following deductions which take into
consideration the conventional difference between the average temperature and the maximum temperature:
- Classes A and E 5°C
- Classes B and F 10°C
- Classes H to 250 15°C
Trang 2517 Breaking capacity
For plug and socket parts, tests shall be performed in accordance with the relevant national standards
For plug and socket parts, tests shall be performed in accordance with the relevant national standards
19 Force necessary to withdraw the plug
For plug and socket parts, tests shall be performed in accordance with the relevant national standards
20 Flexible cables and their connections
20.1 Plug and socket outlet parts
For plug and socket parts, test shall be performed in accordance with the relevant national standards
The tests below apply to all other filter parts
20.2 Filter parts
Any filter device part shall be provided with a cord anchorage such that the conductors are relieved from
strain, including twisting, when they are connected to the terminals or terminations, and that their covering
is protected from abrasion
The sheath, if any, of the cord shall be clamped within the cord anchorage
Compliance is checked by inspection and by the following test:
The effectiveness of the retention is checked by the following test by means of an apparatus as shown in
Figure 2
Non-rewirable filter devices are tested as delivered
Rewirable accessories are tested with each of the types of cable or cord complying with HD 21 and
HD 22 shown in Table 7
Table 7 – Make-up of cables suitable for the retention test of rewirable filter devices
Conductors of the flexible cable or cord of rewirable accessories are introduced into the terminals and the
terminal screws are tightened just sufficiently to prevent the position of the conductors from easily
3 x 1,5
11
11
Trang 26The cord anchorage is used in the normal way Clamping screws, if any, are tightened with a torque equal
to two-thirds of that specified in Table 4 of EN 60999-1
After reassembly of the sample, the component parts shall fit snugly and it shall not be possible to push the cable or cord into the sample to any appreciable extent
The sample is placed in the test apparatus so that the axis of the cable or cord is vertical where it enters the sample
The cable or cord is then subjected 100 times to a pull of 60 N
The pulls are applied each time for 1 s without jerks
NOTE Care should be taken to exert the same pull simultaneously on all parts (core, insulation and sheath) of the flexible cable or cord
Immediately afterwards, the cable or cord is subjected for 1 min to a torque of 0,25 Nm
After the tests, the cable or cord shall not have been displaced by more than 2 mm with the cable subjected to the pull of 60 N For rewirable accessories, the end of the conductors shall not have moved noticeably in the terminals For non-rewirable accessories, there shall be no break in the electrical connections
For the measurement of the longitudinal displacement, a mark is made on the cable or cord while it is subjected to the pull, at a distance of approximately 2 cm from the end of the sample or the cord guard, before starting the tests If, for non-rewirable accessories, there is no definite end to the cord-connected part of the filter devices an additional mark is made on the body of this part
20.3 Non-rewirable parts
20.3.1 Non-rewirable parts of filter devices shall be provided with a flexible cable or cord complying with
HD 21 or HD 22 The minimum cross-sectional areas of the conductors in relation to the rating of the plug part and the socket-outlet part are given in the relevant columns of Table 8
Table 8 – Minimum cross-sectional area for cables for non-rewirable filter devices
Rating of the plug part and of the socket-outlet parts Minimum cross-section for non-rewirable accessories
Guards provided for this purpose shall be of insulating material and shall be fixed in a reliable manner
NOTE 1 Helical metal springs, whether bare or covered with insulating material, should not be used as cord guards