SIST EN 50521:2009
(Main)Connectors for photovoltaic systems - Safety requirements and tests
Connectors for photovoltaic systems - Safety requirements and tests
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 be engaged and disengaged under voltage.
Steckverbinder für Photovoltaik-Systeme - Sicherheitsanforderungen und Prüfungen
Diese Norm gilt für Steckverbinder zur Verwendung in Photovoltaik-Anlagen mit Bemessungsspannungen bis 1 500 V DC und Bemessungsströmen bis 125 A je Kontakt nach Anwendungsklasse A der EN 61730-1. Sie gilt für Steckverbinder, die keine Schaltleistung haben, jedoch spannungsführend getrennt und gesteckt werden können. ANMERKUNG Diese Norm kann auch für Steckverbinder der Anwenderklasse B und C der EN 61730 sowie für Steckverbinder der Schutzklasse II im Bereich von 0 bis 120 V DC in Photovoltaik-Anlagen angewandt werden, in diesem Fall dient diese Norm als Leitfaden.
Connecteurs pour systèmes photovoltaïques - Exigences de sécurité et essais
La présente norme s’applique à des connecteurs de la classe d’application A conformes à la EN 61730-1, utilisés dans les systèmes photovoltaïques de tension assignée pouvant atteindre 1 500 V en courant continu et de courant assigné pouvant atteindre 125 A par contact. La présente norme s'applique à des connecteurs sans pouvoir de coupure mais qui peuvent être branchés et débranchés sous tension. NOTE La présente norme peut être utilisée comme guide pour des connecteurs conformes aux classes B et C de la EN 61730 ainsi que pour la protection des équipements de classe II utilisables entre 0 V et 120 V c.c. dans des systèmes photovoltaïques.
Konektoriji za fotonapetostne sisteme - Varnostne zahteve in preskusi
Ta standard se uporablja za konektorje razreda uporabe A v skladu s standardom EN 61730-1 za uporabo v fotonapetostnih sistemih z nazivnimi enosmernimi napetostmi do 1000 V in nazivnimi toki do 125 A na stik. Ta standard se uporablja za konektorje brez zmogljivosti prekinitve, vendar jih je mogoče priključiti in odstraniti pod napetostjo.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Konektoriji za fotonapetostne sisteme - Varnostne zahteve in preskusiSteckverbinder für Photovoltaik-Systeme - Sicherheitsanforderungen und PrüfungenConnecteurs pour systèmes photovoltaïques - Exigences de sécurité et essaisConnectors for photovoltaic systems - Safety requirements and tests31.220.10Plug-and-socket devices. Connectors27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 50521:2008SIST EN 50521:2009en,fr,de01-december-2009SIST EN 50521:2009SLOVENSKI
STANDARD
SIST EN 50521:2009
EUROPEAN STANDARD EN 50521 NORME EUROPÉENNE
EUROPÄISCHE NORM November 2008
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
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.
SIST EN 50521:2009
EN 50521:2008 – 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 __________ SIST EN 50521:2009
– 3 – EN 50521:2008 Contents
1 Scope . 5 2 Normative references . 5 3 Definitions . 7 4 Classification . 10 4.1 General . 10 4.2 Type of connector . 10 4.3 Additional characteristics . 10 5 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 6 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 1 – Device for the bending test . 23 Figure A.1 – Symbol "DO NOT DISCONNECT UNDER LOAD" . 33 SIST EN 50521:2009
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 (test 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
SIST EN 50521:2009
– 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 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 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) SIST EN 50521:2009
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 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 IEC/TR 60629 1), 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. SIST EN 50521:2009
– 7 – EN 50521:2008 IEC/TR 60943, Guidance concerning the permissible temperature rise for parts of electrical equipment, in particular for 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 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] SIST EN 50521:2009
EN 50521:2008 – 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.
SIST EN 50521:2009
– 9 – EN 50521:2008 3.21 rated insulation voltage r.m.s. withstand voltage value assigned by the manufacturer to the connector, characterising the specified (long term) withstand capability of its insulation [EN 60664-1, definition 1.3.9.1, modified] NOTE
The rated insulation voltage is not necessarily equal to the rated voltage, which is primarily related to functional performance. 3.22 rated impulse voltage impulse withstand voltage value assigned by the manufacturer to the connector, characterising the specified withstand capability of its insulation against transient overvoltages [EN 60664-1, definition 1.3.9.2, modified] 3.23 impulse withstand voltage highest peak value of impulse voltage, of prescribed form and polarity which does not cause breakdown of the insulation under specified conditions [EN 60664-1, definition 1.3.8.1] NOTE
The impulse withstand voltage is equal to or higher than the rated impulse voltage. 3.24 r.m.s. withstand voltage (power-frequency withstand voltage) highest r.m.s. value of a voltage which does not cause breakdown of the insulation under specified conditions [EN 60664-1, definition 1.3.8.2] 3.25 rated current current value assigned by the manufacturer, which the connector can carry continuously (without interruption) and simultaneously through all its contacts wired with the largest specified conductor, preferably at an ambient temperature of 85 °C, without the upper limiting temperature being exceeded NOTE
If other ambient temperature values are used for the definition of the rated current, the manufacturer should state in the technical documentation the ambient temperature on which the rating is based, with reference, if appropriate, to the derating curve defined in EN 60512-5-2, test 5b. 3.26 functional insulation insulation between conductive parts which is necessary only for the proper functioning of the equipment [EN 60664-1, definition 1.3.17.1] 3.27 basic insulation insulation applied to live parts to provide basic protection against electric shock [EN 60664-1, definition 1.3.17.2] NOTE
Basic insulation does not necessarily include insulation used exclusively for functional purposes (see EN 61140, 3.10.1). 3.28 supplementary insulation independent insulation applied in addition to basic insulation, in order to provide protection against electric shock in the event of a failure of basic insulation (see EN 61140, 3.10.2) [EN 60664-1, definition 1.3.17.3] 3.29 double insulation insulation comprising both basic insulation and supplementary insulation (see EN 61140, 3.10.3) [EN 60664-1, definition 1.3.17.4] SIST EN 50521:2009
EN 50521:2008 – 10 – 3.30 reinforced insulation single insulation system applied to live parts, which provides a degree of protection against electric shock equivalent to double insulation under the conditions specified in the relevant EN standard (see EN 61140, 3.10.4) [EN 60664-1, definition 1.3.17.5] NOTE
A single insulation system does not imply that the insulation must be a homogeneous piece. It may comprise several layers which cannot be tested separately as basic or supplementary insulation. 3.31 internal insulation part of basic insulation providing the required clearance and creepage distances inside a conductive housing or enclosure 3.32 application Class A according to EN 61730-1 connectors which are provided for using in this application class can be used in systems where free access are expected and rated values exceed 120 V d.c. connectors which comply with the requirements of this standard and which are classified in this application class are considered to meet the requirements of protection Class II (EN 61730-1, modified) 3.33 application Class B according to EN 61730-1 connectors which are provided for use in this application class may only be used in systems where free access is restricted by fences, location etc. connectors which are classified in this application class and which are protected by basic insulation are considered to meet the requirements of protection Class 0 3.34 application Class C according to EN 61730-1 connectors which are provided for use in this application class can be used in systems where free access are expected and rated values less than 120 V d.c. connectors which comply with the requirements of this standard and which are classified in this application class are considered to meet the requirements of protection Class III NOTE
Protection classes are defined in EN 61140. 4 Classification 4.1 General In order to apply the relevant test requirements, connectors shall be classified by the manufacturer’s specification, according to their intended use under consideration of application Class A, according to EN 61730-1 and characteristics, as set out below. 4.2 Type of connector a) Fixed connector. b) Free connector. 4.3 Additional characteristics c) Connector with cable anchorage. d) Degree of protection of a connector. e) Connector for Class II equipment. SIST EN 50521:2009
– 11 – EN 50521:2008 f) Non-rewirable connector. g) Rewirable connector. h) Terminations and connection methods. 5 Constructional requirements and performance 5.1 General For connectors according to the present standard no values have been defined for electric rated values voltage and current. These values must be assigned by the manufacturer. Connectors must be suitable for the durable outdoor use in an ambient temperature area from –40 °C to +85 °C. Multi-way connectors must be designed so that these requirements for earth faulted and short-circuit-proofed installation complies with HD 60364-7-712. Connectors shall be so designed and dimensioned that they can withstand the electrical, mechanical, thermal, corrosive and stress caused by the weather conditions which occur in their intended use and present no danger to the user or the environment. Electrical connections shall be so designed that the contact pressure is not transmitted through insulating material other than ceramic, pure mica or other material with suitable characteristics. Compliance with these requirements is verified by specified tests of this standard. 5.2 Marking and identification 5.2.1 Identification Connectors shall be identified and characterised by the following markings: a) manufacturer’s name, trademark or mark of origin; b) type reference which may be the catalogue number; c) rated current in amperes (A); d) rated voltages or rated insulation voltages between line to earth and line to line in volts (V); e) rated impulse voltage in kilovolts (kV), if specified; f) pollution degree; g) degree of protection by enclosure according to EN 60529; h) range of temperature (ULT and LLT, maximum ambient temperature); i) type of terminals; j) connectable conductors; k) reference to this standard or to the DS, if applicable; l) symbol „Do not disconnect under load“ as given in Annex A; NOTE
Alternatively an adequate warning notice can be found in particular national language. m) polarity of connector, if applicable. SIST EN 50521:2009
EN 50521:2008 – 12 – 5.2.2 Marking The marking shall be indelible and easily legible. The minimum marking on the connector shall be that of item a), l) and m) in 5.2.1. Symbol or warning notice listed in I) of 5.2.1 must be imprinted or labelled close to connector. A notice to attach the sticker must be given in technical documentation. Markings a) and b) of 5.2.1 shall be applied on the smallest package unit. All markings of 5.2.1 shall be given in the technical documentation or catalogue of the manufacturer. 5.3 Provision against incorrect mating (non-intermateable) A multi-way connector shall be so designed that contact between protective earthing contacts and live contacts is not possible by engagement. Compliance shall be tested by performing a polarisation test (see Table 6). 5.4 Protection against electric shock 5.4.1 A connector shall be so designed that, after mounting, its live parts are not accessible by the test finger in accordance with EN 60529. 5.4.2 Protection against electric shock shall be ensured also during insertion and withdrawal. Compliance shall be tested by the test finger in accordance with EN 60529. 5.5 Terminations and connection methods This standard applies to the following terminations and connection methods: a) crimped connections according to EN 60352-2 b) insulation displacement connections
according to EN 60352-3 (accessible IDC) or EN 60998-2-3 c) insulation displacement connections
according to EN 60352-4 (non-accessible IDC) or EN 60998-2-3 d) press-in connections according to EN 60352-5 e) insulation piercing connections according to EN 60352-6 or EN 60998-2-3
f) screwless-type clamping units according to EN 60999-1 or EN 60999-2 or EN 60352-7 g) screw-type clamping units according to EN 60999-1 or EN 60999-2 h) flat, quick-connect terminations according to IEC 60760 and EN 61210
At least the following applicable tests shall be conducted: a) for crimped connections, visual tests on the crimp barrel and tensile strength test of the crimp connection as specified in EN 60352-2. If deviations to EN 60352-2 exist, the tensile strength according to EN 60352-2 and the dimensions according to the manufactures specification are tested to fulfil EN 61984. SIST EN 50521:2009
– 13 – EN 50521:2008 b) and c) for insulation displacement connections, visual examination is carried out on new parts for insulation displacement terminals according to EN 60352-3, 12.1 and for solderless non-accessible displacement terminals according to EN 60352-4, 12.2.4. The electrical and thermal tests are carried out according to EN 61984. d) for press-in connections, visual and dimensional tests on the press-in post and test of the push-out force as specified in EN 60352-5. e) insulation piercing connections according to EN 60352-6 or EN 60998-2-3. f) for the screwless-type clampi
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