Bsi bs en 50521 2008 + a1 2012

BS EN 50521:2008+A1:2012 BS EN 50521:2008 BSI Standards Publication Connectors for photovoltaic systems — Safety requirements and tests BS BS EN EN 50521:2008+A1:2012 50521:2008 BRITISH BRITISHSTANDARD STANDARD National foreword This British is the UKUK implementation of ENof 50521:2008 This BritishStandard Standard is the implementation EN 50521:2008+A1:2012 It supersedes BS EN 50521:2008, which is The UK participation in its preparation was entrusted to Technical Committee withdrawn GEL/82, Solar photovoltaic energy systems The start and finish of text introduced or altered by amendment is A list of organizations represented on this committee can be obtained on indicated in the text by tags Tags indicating changes to CENELEC text request to its secretary carry the number of the CENELEC amendment For example, text altered by amendment A1 is indicated by the  ThisCENELEC publication does not purport to include all necessary provisions of a contract Users are responsible for its correctwas application The UK participation in its preparation entrusted to Technical Committee GEL/82, Solar Photovoltaic Energy Systems © BSI 2009 A list978 of organizations ISBN 580 62315 represented on this committee can be obtained on request to its secretary ICS 29.120.30 This publication does not purport to include all the necessary provisions of a contract Users are for its correct Compliance with a responsible British Standard cannotapplication confer immunity from legal obligations © The British Standards Institution 2012 Published by BSI Standards Limited 2012 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2009 ISBN 978 580 78452 Amendments issued since publication ICS 29.120.30 Amd No Date Text affected Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2009 Amendments/corrigenda issued since publication Date Text affected 30 September 2012 Implementation of CENELEC amendment A1:2012 BS EN 50521:2008 EUROPEAN STANDARD EN 50521:2008+A1 50521 NORME EUROPÉENNE EUROPÄISCHE NORM July 2012 2008 November ICS 29.120.30 English version Connectors for photovoltaic systems Safety requirements and tests Connecteurs pour systèmes photovoltaïques Exigences de sécurité et essais Steckverbinder für Photovoltaik-Systeme Sicherheitsanforderungen und Prüfungen This European Standard was approved by CENELEC on 2008-10-01 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50521:2008 E BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 –2– Foreword This European Standard was prepared by the Technical Committee CENELEC TC 82, Solar photovoltaic energy systems The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50521 on 2008-10-01 The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-10-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-10-01 EN 50521:2008/A1:2012 -2 Foreword Foreword to amendment A1 This document (EN 50521:2008/A1:2012) has been prepared by CLC/TC 82 "Solar photovoltaic energy systems" The following dates are fixed: • • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with this document have to be withdrawn (dop) 2013-06-25 (dow) 2015-06-25 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights –3– BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 Contents Scope Normative references Definitions Classification 10 4.1 General 10 4.2 Type of connector 10 4.3 Additional characteristics 10 Constructional requirements and performance 11 5.1 General 11 5.2 Marking and identification .11 5.3 Provision against incorrect mating (non-intermateable) 12 5.4 Protection against electric shock 12 5.5 Terminations and connection methods 12 5.6 Resistance to ageing 13 5.7 General design 13 5.8 Design of a free connector 14 5.9 Degree of protection (IP-Code) .14 5.10 Dielectric strength 14 5.11 Mechanical and electrical durability 14 5.12 Range of ambient temperature .14 5.13 Temperature rise 14 5.14 Cable anchorage 15 5.15 Mechanical strength 15 5.16 Connector without locking device 15 5.17 Connector with locking device 16 5.18 Clearances and creepage distances 16 5.19 Insulation 17 5.20 Insulation parts 18 5.21 Current carrying parts and resistance against corrosion 18 Tests 18 6.1 General 18 6.2 Preparation of specimens 19 6.3 Performance of tests 20 6.4 Test schedule (routine test) for non-rewirable free connectors .25 6.5 Test schedule 26 Annex A (normative) Symbol 33 Bibliography 34 Figures Figure – Device for the bending test 23 Figure A.1 – Symbol "DO NOT DISCONNECT UNDER LOAD" 33 BS EN 5021:2008 50521:2008+A1:2012 EN 50521:2008 EN 50521:2008+A1:2012 –4– Tables Table – Values for cable anchorage testing 15 Table – Rated impulse voltages 16 Table – Plan of specimens required for tests 19 Table – Values of torque for screw-type clamping units 20 Table – Test voltages 24 Table – Mechanical test group A (test group A are for themselves separate tests) 26 Table – Service life test group B 28 Table – Thermal test group C (mated test specimen) 29 Table – Climatic test group D (mated test specimen) 30 Table 10 – Degree of protection, test group E 31 Table 11 – Insulation material, test group F 32 –5– BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 Scope This Standard applies to connectors of connectors application of Class A according 61730-1 in photovoltaic This European Standard applies to application ClasstoA EN according to for ENuse 61730-1 for use in systems withsystems rated voltages up to 000 Vup d.c currents up to 125 A up pertocontact photovoltaic with rated voltages to and 1 500rated V DC and rated currents 125 A per contact. This standard applies to connectors without breaking capacity but might be engaged and disengaged under voltage NOTE For connectors according to Class B and C of EN 61730 as well as for protection for Class II equipment intended for use between V and 120 V d.c in photovoltaic-systems this standard may be used as a guide Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 50262:1998, Cable glands for electrical installations A1:2001 A2:2004 EN 60068-1:1994, Environmental testing – Part 1: General and guidance (IEC 60068-1:1988 + A1:1992 + corr 1988) EN 60068-2-14, Environmental testing – Part 2: Tests – Test N: Change of temperature (IEC 60068-2-14) EN 60068-2-70:1996, Environmental testing – Part 2: Tests – Test Xb: Abrasion of marking and letterings caused by rubbing of fingers and hands (IEC 60068-2-70:1995) EN 60068-2-75, Environmental testing – Part 2: Tests – Test Eh: Hammer tests (IEC 60068-2-75) EN 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state (IEC 60068-2-78) EN 60228, Conductors of insulated cables (IEC 60228) EN 60309-1:1999, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General requirements (IEC 60309-1:1999) EN 60352-2, Solderless connections – Part 2: Solderless crimped connections – General requirements, test methods and practical guidance (IEC 60352-2) EN 60352-3:1994, Solderless connections – Part 3: Solderless accessible insulation displacement connections –General requirements, test methods and practical guidance (IEC 60352-3:1993) EN 60352-4:1994, Solderless connections – Part 4: Solderless non-accessible insulation displacement connections – General requirements, test methods and practical guidance (IEC 60352-4:1994) EN 60352-5, Solderless connections – Part 5: Solderless press-in connections – General requirements, test methods and practical guidance (IEC 60352-5) EN 60352-6, Solderless connections – Part 6: Insulation piercing connections – General requirements, test methods and practical guidance (IEC 60352-6) EN 60352-7, Solderless connections – Part 7: Spring clamp connections – General requirements, test methods and practical guidance (IEC 60352-7) EN 60512 series, Connectors for electronic equipment – Tests and measurements (IEC 60512 series) EN 60512-1, Electromechanical components for electronic equipment – Basic testing procedures and measuring methods – Part 1: General (IEC 60512-1) BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 –6– EN 60512-11-7:2003, Connectors for electronic equipment – Tests and measurements – Part 11- 7: Climatic tests – Test 11g: Flowing mixed gas corrosion test (IEC 60512-11-7:2003) EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989) 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 60695-2-10, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods – Glow-wire apparatus and common test procedure (IEC 60695-2-10) EN 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical flame test methods (IEC 60695-11-10) EN 60998-2-3, Connecting devices for low-voltage circuits for household and similar purposes – Part 2-3: Particular requirements for connecting devices as separate entities with insulation-piercing clamping units (IEC 60998-2-3) 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 mm2 up to 35 mm2 (included) (IEC 60999-1:1999) EN 60999-2:2003, Connecting devices – Electrical copper conductors – Safety requirements for screw-type and screwless-type clamping units – Part 2: Particular requirements for clamping units for conductors above 35 mm² up to 300 mm² (included) (IEC 60999-2:2003) EN 61140:2002, Protection against electric shock – Common aspects for installation and equipment (IEC 61140:2001) EN 61210:1995, Connecting devices – Flat quick-connect terminations for electrical copper conductors – Safety requirements (IEC 61210:1993, mod.) EN 61215:2005, Crystalline silicon terrestrial photovoltaic (PV) modules – Design qualification and type approval (IEC 61215:2005) EN 61730-1, Photovoltaic (PV) module safety qualification – Part 1: Requirements for construction (IEC 61730-1, mod.) EN 61984, Connectors – Safety requirements and tests (IEC 61984) HD 60364-7-712, Electrical installations of buildings – Part 7-712: Requirements for special installations or locations – Solar photovoltaic (PV) power supply systems (IEC 60364-7-712) EN ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc sources (ISO 4892-2) EN ISO 6988:1994, Metallic and other non organic coatings – Sulfur dioxide test with general condensation of moisture (ISO 6988:1985) IEC 60050-581:1978, International Electrotechnical Vocabulary (IEV) – Chapter 581: Electromechanical components for electronic equipment IEC 60050-826:1982, International Electrotechnical Vocabulary (IEV) – Chapter 826: Electrical installations IEC 60060-1:1989, High-voltage test techniques – Part 1: general definitions and test requirements 1) IEC/TR 60629 , Standard sheets for a modular system (for installation accessories for use in domestic and similar installations) IEC 60760:1989, Flat, quick-connect terminations ——————— 1) Withdrawn publication –7– BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 IEC/TR 60943, Guidance concerning the permissible temperature rise for parts of electrical equipment, in particular for terminals Definitions For the purposes of this document, definitions from IEC 60050-581, IEC 60050-826, EN 60309-1, EN 60664-1, EN 60999-1 and EN 61140, together with the following, apply 3.1 connector component which terminates conductors for the purpose of providing connection to and disconnection from a suitable mating component [IEV 581-06-01] 3.2 multi-way connector connector with more than one contact NOTE Multiple single-way connectors used in a PV-junction box are not to be regarded as a multi-way connector according to this standard 3.3 connector under voltage (CuV) connector specially designed to be engaged or disengaged in normal use when live but not under load NOTE In this standard, the term "live" is used if contacts are under an applied voltage, but not necessarily carrying current The term "load" is used if a current is flowing through the contacts 3.4 free connector connector for attachment to the free end of a wire or cable [IEV 581-06-12] 3.5 fixed connector connector for attachment to a rigid surface [IEV 581-06-10] 3.6 non-rewirable connector connector so constructed that the cable cannot be separated from the connector without making it permanently useless [EN 60309-1, definition 2.5, modified] 3.7 connector for Class II equipment connector in which the protection against indirect contact is realised by double or reinforced insulation NOTE Class II according to EN 61140 3.8 intended use application conditions of connectors which are included within the permissible rated values and environmental conditions and characteristics assigned by the manufacturer 3.9 interlock device, either electrical or mechanical, which prevents the contacts of a connector from becoming live before it is in proper engagement with its counterpart, and which either prevents the connector from being withdrawn while its contacts are live or makes the contacts dead before separation [EN 60309-1, definition 2.9, modified] BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 –8– 3.10 cycle of mechanical operation one insertion and one withdrawal of the connector with his counterpart 3.11 clamping unit part(s) of the terminal necessary for the mechanical clamping and the electrical connection of the conductor(s), including the parts which are necessary to ensure the correct contact pressure [EN 60999-1, definition 3.1] 3.12 upper limiting temperature maximum temperature of a connector as defined by the manufacturer, in which the connector is intended to operate NOTE The abbreviation ULT is often used 3.13 ambient temperature maximum temperature of the ambient assigned from the manufacturer, in which the connector is able to operate permanently without the upper limiting temperature being exceeded 3.14 lower limiting temperature minimum temperature of a connector as defined by the manufacturer in which a connector is intended to operate NOTE The abbreviation LLT is often used 3.15 clearance the shortest distance in air between two conductive parts [EN 60664-1, definition 1.3.2] 3.16 creepage distance shortest distance along the surface of the insulating material between two conductive parts [EN 60664-1, definition 1.3.3] 3.17 overvoltage category numeral defining a transient overvoltage condition [EN 60664-1, definition 1.3.10] 3.18 pollution any addition of foreign matter, solid, liquid, or gaseous, that can result in a reduction of electric strength or surface resistivity of the insulation [EN 60664-1, definition 1.3.11] 3.19 pollution degree numeral characterizing the expected pollution of the micro-environment [EN 60664-1, definition 1.3.13] 3.20 rated voltage value of voltage assigned by the manufacturer to the connector and to which operation and performance characteristics are referred [EN 60664-1, definition 1.3.9, modified] NOTE Rated voltage is equivalent to the rated system voltage according to EN 61730-1 BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 6.3.6 – 22 – Bending (flexing) test (see EN 60309-1, 24.4, modified) Non-rewirable connectors shall be subjected to a bending test in an apparatus similar to that shown in Figure The specimen is fixed to the oscillating member of the apparatus so that, when this is at the midpoint of its travel, the axis of the flexible cable, where it enters the specimen, is vertical and passes through the axis of oscillation The oscillating member is so positioned that the flexible cable makes a minimum lateral movement when the oscillating member of the test apparatus is moved over its full travel The cable is loaded with a weight such that the force applied is • 20 N for non-rewirable connectors with a conductor cross-section > 0,75 mm², • 10 N for non-rewirable connectors with a conductor cross-section ≤ 0,75 mm² A current equal to the rated current of the connector is passed through the conductors, the voltage between them being the rated voltage The oscillating member is moved backwards and forwards through an angle of 90° (45° on either side of the vertical) The rate of bendings shall be 60 per minute One bending is one movement, either backwards or forwards Specimens with cables of circular cross-section shall be rotated approximately 90° around the vertical axis within the oscillating part after 50 % of flexings; specimens with flat flexible cables are only bent in a direction perpendicular to the plane containing the axis of the conductor During this test, there shall be no interruption of the test current and no short-circuit between the conductors, if any After the test there shall be no damage; the cable support sleeve shall not be loosened from the body and the insulation shall show no signs of abrasion or of wear and tear Broken strands shall not pierce the insulation – 23 – BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 Figure – Device for the bending test 6.3.7 Measurement of clearances and creepage distances Clearances and creepage distances shall be measured according to EN 60664-1 with following additional requirements For connectors without breaking capacity, clearances and creepage distances to the accessible surface shall be measured only in the mated position For multi-way connectors the requirements for double or reinforced isolation between active parts with different potential shall be determined in mated and unmated condition The surface of an unenclosed connector to be incorporated into an equipment or a device shall not be regarded as accessible, unless otherwise claimed by the manufacturer BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 6.3.8 – 24 – Dielectric strength The insulation shall be tested according to the following tests: a) Impulse withstand test The impulse withstand test shall be carried out with a voltage having a 1,2/50 µs waveform according to IEC 60060-1 with three impulses of each polarity and an interval of at least s between impulses The output impedance of the impulse generator should not be higher than 500 Ω The test voltage shall be taken from Table Table - Test voltages Impulse test voltage a Rated voltage kV (1,2/50 µs) a V At 000 m At sea level 100 1,5 1,75 150 2,5 2,95 300 4,0 4,8 600 6,0 7,3 000 8,0 9,8 If the test laboratory is located between sea level and an altitude of 000 m above sea level, interpolation of the impulse withstand voltage is allowed b) Voltage proof (EN 60512-4-1, test 4a) The voltage proof shall be performed by applying a r.m.s withstand voltage (50/60 Hz) with a r.m.s value of 000 V + times rated voltage The test duration shall be 6.3.9 Corrosion test For testing the protection of contacts against the influence of a corrosive atmosphere, one of the two alternative tests shall be selected In both cases, the specimens shall be mated Test 1: Flowing mixed gas corrosion according to test 11g of EN 60512, with a choice of method or method (see EN 60512-11-7, Table 1) The test duration shall be four days Test 2: Sulphur dioxide test with general condensation of moisture according to EN ISO 6988 The test duration shall be 24 h (1 test cycle) 6.3.10 Mechanical strength at lower temperatures The specimens and the test apparatus shall be stored for h at a temperature of –40 °C on a steel plate of 20 mm thickness The test shall be carried out immediately after the storage duration in the cold chamber Test shall be carried according to the following procedure: Four impacts on the specimen, an energy of joule with an appropriate impact test apparatus according to EN 60068-2-75 shall be carried out at four uniformly distributed positions on the circumference The test is passed successfully if no damage appeared which may impair the function of the connector – 25 – BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 6.3.11 Thermal cycle test (EN 60068-2-14 test Nb) The test shall be carried in climatic chamber without any pre-treatment of the specimens as follows: - 30 at upper temperature of + 85 °C ± °C; - 30 at lower temperature of - 40 °C ± °C; - transfer duration t2 ≤ min; - number of test cycles: 200 6.3.12 Damp heat test The test shall be carried out according to EN 60068-2-78 with the following test conditions: Severity according to EN 61215, 10.13: - test temperature: + 85 °C ± °C - relative humidity: + 85 % ± % - test duration: 000 h 6.3.13 Insertion and withdrawal force The test shall be carried out with the relevant counterpart according to EN 60512, test 13b The actuation speed shall be 50 mm/min 6.3.14 Effectiveness of connector coupling device The test shall be carried out according to EN 60512, test 15f The specified force shall be applied in the direction of the separation of the mated pair with the rate of 10 N/sec 6.4 Test schedule (routine test) for non-rewirable free connectors For non-rewirable free connectors, it shall be ensured that live parts, e.g loose strands, cannot become accessible If this cannot be ensured by design or by the manufacturing process, each manufactured connector shall be subjected to the following test The accessible outer surface of the connector, with the exception of the engagement face of the male connector, shall be scanned by plane electrodes with a force of 20 N and each time the specified impulse withstand voltage of the connector shall be applied between all live parts and these electrodes according to 6.3.8 Alternatively, the specified r.m.s withstand voltage according to 6.3.8 shall be applied for a minimum of three full cycles (60 ms) No breakdown or flashover shall occur BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 6.5 – 26 – Test schedule Table – Mechanical test group A (test group A are for themselves separate tests) Test phase Designation EN 60512 test no Test according to Severity or conditions A1 A2 Durability of marking A3 Polarisation A4 Terminations A5 Contact retention in insert 6.3.2 13e Measurements to be performed Designation or title EN 60512 test no Any existing cover shall be removed, if required Visual and dimensional examination 1a, 1b With the naked eye Visual examination 1a Test force: 20 N or 1,5 times the insertion force, whichever is higher, but not higher than 80 N Requirements 5.2 Dimensions shall comply with the manufacturer's specification Markings according to 5.2 5.3 Visual examination 1a Verification by test report or minimum test 15a No damage likely to impair function 5.5 5.15.2 Test load shall be three times the specified insertion force (mating) of one contact or the specified insertion force of one contact plus 50 N, whichever is less The minimum test load shall not be less than 20 N A6.1 Cable clamp (pull) 17c Visual examination 1a No axial displacement likely to impair normal operation 5.14, Table A6.2 Cable clamp (torsion) 17d Visual examination 1a 5.14, Table Visual examination 1a BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 27 – Table – Mechanical test group A (test group A are for themselves separate tests) (continued) Test phase Designation EN 60512 test no Test according to Severity or conditions A7 Mechanical strength impact 7b Measurements to be performed Designation or title EN 60512 test no Visual examination 1a Visual examination 1a Requirements Only free connectors Dropping height: – 750 mm for specimens of mass ≤ 250 g, – 500 mm for specimens of mass > 250 g Dropping cycles: Positions in 45° steps, one cycle per position A8 Mechanical strength at lower temperature 6.3.10 Test temperature: lower limiting temperature specified for the specimen Test duration: h A9 Insertion and withdrawal force 13b 6.3.13 Only for connectors without coupling device or locking means A10 Effectiveness of connector coupling device 15f 6.3.14 Only for connectors with coupling device or locking means NOTE Test group A consists of separate tests There is no required test sequence Parts used for protection against electric shock shall not be damaged A reduction of clearances and creepage distances is not allowed 5.15 5.16 Visual examination 5.17 No damage likely to impair function BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 28 – Table – Service life test group B Test phase Designation EN 60512 test no Test according to Severity or conditions B1 Initial measurement Test current: A a Measuring points : Measurements to be performed Designation or title EN 60512 test no Contact resistance 2b Requirements Reference value for subsequent measurement At the end of the termination Maximum three contacts per specimen B2 B3 Mechanical operation 9a 5.11 6.3.5 Final measurement Same conditions as for test phase B1 6.3.8 b) contact/earth b Bending test 6.3.6 1a No damage likely to impair function Contact resistance 2b b) Voltage proof 4a Deviation of the contact resistance shall be no more than 50 % of the reference value or ≤  5mΩ The higher value is permissible 5.18.2 There shall be no breakdown or flashover Measuring points a: contact/contact B4 Visual examination 6.3.6 Only non-rewirable connectors Visual examination 1a No damage likely to impair function a Measuring points: At the conductors as close as possible to the termination If this is not possible, the conductor resistance shall be recalculated b Earth in the sense of non live metal parts (e.g fixing devices/housings/accessible surfaces) BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 29 – Table – Thermal test group C (mated test specimen) Test phase Designation EN 60512 test no Test according to Severity or conditions C1 Initial measurement Measurements to be performed Designation or title Test current: A a Measuring points : Contact resistance Requirements EN 60512 test no 2b Reference value for subsequent measurement At the end of the termination Maximum three contacts per specimen C2 C3 Temperature rise test 5a Dry heat 11i 5.13 6.3.4 The upper specified temperature shall not be exceeded Test temperature: Upper limiting temperature specified for the specimen Test duration: 000 h C4 a Final measurement Any existing cover shall be removed if required Visual examination 1a No damage likely to impair function Same conditions as in C1 Contact resistance 2b Deviation of the contact resistance shall be no more than 50 % of the reference value or ≤ mΩ The higher value is permissible Measuring points: At the conductors as close as possible to the termination If this is not possible, the conductor resistance shall be recalculated BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 30 – Table – Climatic test group D (mated test specimen) Test phase Designation EN 60512 test no Test according to Severity or conditions D1 Initial measurement Measurements to be performed Designation or title Test current: A a Measuring points : Requirements EN 60512 test no Contact resistance 2b Reference value for subsequent measurement Visual examination 1a No damage likely to impair function Visual examination 1a No damage likely to impair function At the end of the termination Maximum three contacts per specimen D2 Thermal cycle test 6.3.11 Upper temperature: +85 °C Lower temperature: -40 °C Number of test cycles: 200 D3 Damp heat 6.3.12 Test temperature: +85 °C Relative humidity: 85 % Test duration: 000 h D4 Dielectric strength 6.3.8 a) and b) Measuring points a: contact/contact contact/earth b 5.8.1.2 No breakdown or flashover a) Impulse withstand voltage Test voltage (impulse withstand voltage) according to Table shall be applied Measuring points a: contact/contact b) Voltage proof 4a contact/earth b D5 D6 Corrosion test Final measurement 11g 6.3.9 Alternative: Corrosion test 6.3.9 according to EN ISO 6988 5.21.1 Test Test Visual examination 1a No damage likely to impair function Same conditions as for test phase D1 Contact resistance 2b Deviation of the contact resistance shall be no more than 50 % of the reference value or ≤ mΩ The higher value is permissible a Measuring points: At the conductors as close as possible to the termination If this is not possible, the conductor resistance shall be recalculated b Earth in the sense of non live metal parts (e.g fixing devices/housings/accessible surfaces) BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 31 – Table 10 – Degree of protection, test group E Test phase Designation EN 60512 test no Test according to Severity or conditions Measurements to be performed Designation or title Requirements EN 60512 test no E1 Degree of protection 6.3.3.1 Test finger according to IEC/TR 60629 with test force of 10 N No live part shall be accessible 5.4.1 E2 Degree of protection IP code 6.3.3.2 IP code as specified by the manufacturer 5.9 Mated connector E3 Dielectric strength 6.3.8 b) The test voltage shall be applied between all live parts and accessible surface b) Voltage proof 4a 5.10 No breakdown or flashover BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 EN 50521:2008+A1:2012 – 32 – Table 11 – Insulation material, test group F Test phase Designation EN 60512 test no Test according to Severity or conditions F1 Weather resistance Measurements to be performed Designation or title Test according to method EN ISO 4892-2 Requirements EN 60512 test no 5.20.2 b) No cracks Visual examination Irradiance: 550 W/m² Wave band: 290 nm - 800 nm Black standard temperature: 65 °C Relative humidity: 65 % Cycle: 18 spraying, 102 drying with Xenonlamp Total duration: 500 h F2 Dielectric strength 6.3.8 b) The test voltage shall be applied between all live parts and accessible surface F3 Flammability b) Voltage proof 4a 5.10 No breakdown or flashover Insulation material for outer housing material Certificate of material supplier or test according to EN 61695-11-10 5.20.2 a) Glow wire test according to EN 60695-2-10 5.20.2 c) No inflame Test temperature: 650 °C F4 Flammability Insulation material keeping active parts in position 5.20.3 a) Certificate of supplier or test according to EN 61695-11-10 Glow wire test according to EN 60695-2-10 Test temperature: 750 °C 5.20.3 c) No inflame – 33 – BS EN 50521:2008+A1:2012 BS EN 50521:2008 EN 50521:2008 EN 50521:2008+A1:2012 Annex A (normative) Symbol Figure A.1 – Symbol "DO NOT DISCONNECT UNDER LOAD" This European Standard applies to connectors of application Class A according to EN 61730-1 for use in photovoltaic systems with rated voltages up to 500 V DC and rated currents up to 125 A per contact BS EN 50521:2008+A1:2012 5021:2008 EN 50521:2008 – 34 – EN 50521:2008+A1:2012 Constructional requirements and performance 5.18.1.2 Overvoltage category Bibliography Replace the text and Table by the following: EN 50262:1998 + A1:2001, Cable glands for electrical installations The assignment of connectors may be carried out according to the rules as given in EN 60664-1 in conjunction with IEC/TR Annexof D, the for overvoltage Category III EN 60112:2003, Method60664-2-1:2011, for the determination proof and the comparative tracking indices of solid insulating materials (IEC 60112:2003) Table – Rated impulse voltage EN 61730-2, Photovoltaic (PV) module safety qualification – Part 2: Requirements for testing Values for the rated impulse voltage Values for the rated impulse voltage Ratedmod.) voltage (IEC 61730-2, for basic insulation for reinforced insulation kV (1,2/50 µs) V DC HD 60364-4-41:2007, Low-voltage electrical installations – Part 4-41: Protection kV for(1,2/50 safetyµs) – Protection 1,5 2,5 against electric 100 shock (IEC 60364-4-41:2005, mod.) 150 2,5 4,0 600 6,0 8,0 HD 60364-5-51:2006, Electrical installations of buildings – Part 5-51: Selection and erection of electrical 300 4,0 6,0 equipment – Common rules (IEC 60364-5-51:2001, mod.) 000 8,0 HD 60364-5-54:2007, Low-voltage electrical installations – Part 5-54: Selection and 12,0 erection of electrical equipment – Earthing arrangements, protective conductors and protective bonding conductors 500 10,0 16,0 (IEC 60364-5-54:2002, mod.) NOTE Values are for overvoltage category III IEC 60417 Database, Graphical symbols for use on equipment Bibliography IEC 60884-1:2006, Plugs and socket-outlets for household and similar purposes – Part 1: General requirements Add the following reference:  IEC/TR 60664-2-1:2011, Insulation coordination for equipment within low-voltage systems – Part 2-1: Application guide – Explanation of the application of the IEC 60664 series, dimensioning examples and dielectric testing  This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and across all sectors choose standards to help them achieve their goals Information on standards We can provide you with the knowledge that your organization needs to succeed Find out more about British Standards by visiting our website at bsigroup.com/standards or contacting our Customer Services team or Knowledge Centre Buying standards You can buy and download PDF versions of BSI publications, including British and adopted European and international standards, through our website at bsigroup.com/shop, where hard copies can also be purchased If you need international and foreign standards from other Standards Development Organizations, hard copies can be ordered from our Customer Services team Subscriptions Our range of subscription services are designed to make using standards easier for you For further information on our subscription products go to bsigroup.com/subscriptions With British Standards Online (BSOL) you’ll have instant access to over 55,000 British and adopted European and international standards from your desktop It’s available 24/7 and is refreshed daily so you’ll always be up to date You can keep in touch with standards developments and receive substantial discounts on the purchase price of standards, both in single copy and subscription format, by becoming a BSI Subscribing Member PLUS is an updating service exclusive to BSI Subscribing Members You will automatically receive the latest hard copy of your standards when they’re revised or replaced To find out more about becoming a BSI Subscribing Member and the benefits of membership, please visit bsigroup.com/shop With a Multi-User Network Licence (MUNL) you are able to host standards publications on your intranet Licences can cover as few or as many users as you wish With updates supplied as soon as they’re available, you can be sure your documentation is current For further information, email bsmusales@bsigroup.com BSI Group Headquarters 389 Chiswick High Road London W4 4AL UK We continually improve the quality of our products and services to benefit your business If you find an inaccuracy or ambiguity within a British Standard or other BSI publication please inform the Knowledge Centre Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) and has formally licensed such information to BSI for commercial publication and use Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI Details and advice can be obtained from the Copyright & Licensing Department Useful Contacts: Customer Services Tel: +44 845 086 9001 Email (orders): orders@bsigroup.com Email (enquiries): cservices@bsigroup.com Subscriptions Tel: +44 845 086 9001 Email: subscriptions@bsigroup.com Knowledge Centre Tel: +44 20 8996 7004 Email: knowledgecentre@bsigroup.com Copyright & Licensing Tel: +44 20 8996 7070 Email: copyright@bsigroup.com