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1、- - - - Connectors for photovoltaic systems Safety requirements and tests BS EN 50521:2008 National foreword This British Standard is the UK implementation of EN 50521:2008. The UK participation in its preparation was entrusted to Technical Committee GEL/82, Solar photovoltaic energy systems. A list
2、 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. BSI 2009 ISBN 978 0 580 62315 8 ICS 29.120.30 Compliance with a Bri
3、tish Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date Text affected BRITISH STANDARDBS EN 50521:200 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 8 EUROPEAN STANDARD EN 50521 NORME EU
4、ROPENNE EUROPISCHE NORM November 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation
5、in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50521:2008 E ICS 29.120.30 English version Connectors for photovoltaic systems - Safety requirements and tests Connecteurs pour systmes photovoltaques - Exigences de scurit et essais Steckverbinder fr Photovoltaik-Syste
6、me - Sicherheitsanforderungen und Prfungen 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 altera
7、tion. 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 tra
8、nslation 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,
9、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. BS EN 50521:2008 EN 50521:2008 2 Foreword This European Standard was pr
10、epared 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 natio
11、nal 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 _ BS EN 5021:2008 3 EN 50521:2008 Contents 1Scope . 5 2Normative references . 5 3Definitions . 7 4Cl
12、assification 10 4.1General .10 4.2Type of connector .10 4.3Additional characteristics 10 5Constructional 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 Ter
13、minations 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、.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 6Tests 18 6.1Gene
15、ral 18 6.2Preparation of specimens 19 6.3Performance of tests 20 6.4Test schedule (routine test) for non-rewirable free connectors . 25 6.5Test schedule .26 Annex A (normative) Symbol .33 Bibliography 34 Figures Figure 1 Device for the bending test 23 Figure A.1 Symbol “DO NOT DISCONNECT UNDER LOAD“
16、 33 BS EN 50521:2008 EN 50521:2008 4 Tables Table 1 Values for cable anchorage testing . 15 Table 2 Rated impulse voltages . 16 Table 3 Plan of specimens required for tests . 19 Table 4 Values of torque for screw-type clamping units . 20 Table 5 Test voltages . 24 Table 6 Mechanical test group A (te
17、st group A are for themselves separate tests) 26 Table 7 Service life test group B . 28 Table 8 Thermal test group C (mated test specimen) 29 Table 9 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 BS EN 5021
18、:2008 5 EN 50521:2008 1 Scope This Standard applies to connectors of application Class A according to EN 61730-1 for use in photovoltaic systems with rated voltages up to 1 000 V d.c. and rated currents up to 125 A per contact. This standard applies to connectors without breaking capacity but might
19、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 0 V and 120 V d.c. in photovoltaic-systems this standard may be used as a guide. 2 Normative references The following referenc
20、ed 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 A2:200
21、4 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 l
22、etterings 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
23、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:
24、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 requiremen
25、ts, 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 requirement
26、s, 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,
27、Electromechanical components for electronic equipment Basic testing procedures and measuring methods Part 1: General (IEC 60512-1) BS EN 50521:2008 EN 50521:2008 6 EN 60512-11-7:2003, Connectors for electronic equipment Tests and measurements Part 11- 7: Climatic tests Test 11g: Flowing mixed gas co
28、rrosion 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,
29、 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-vo
30、ltage 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-ty
31、pe 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 Pa
32、rt 2: Particular requirements for clamping units for conductors above 35 mm up to 300 mm (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
33、 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 (I
34、EC 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 exp
35、osure 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: Electromechani
36、cal 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 IEC/TR 60629 1), Standard sheets for a modular system (fo
37、r installation accessories for use in domestic and similar installations) IEC 60760:1989, Flat, quick-connect terminations 1) Withdrawn publication. BS EN 5021:2008 7 EN 50521:2008 IEC/TR 60943, Guidance concerning the permissible temperature rise for parts of electrical equipment, in particular for
38、 terminals 3 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 disconnec
39、tion 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 speci
40、ally 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
41、 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
42、 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 p
43、ermissible 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
44、 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 EN 50521:2008 8 3.10 cycle of mechanical operation one insertion and one withdrawal of the connector with his counterpart 3.11 clamping u
45、nit 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
46、 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
47、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 c
48、reepage 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-e