EN 50548:2011
(Main)Junction boxes for photovoltaic modules
Junction boxes for photovoltaic modules
This European Standard applies to junction boxes up to 1 500 V DC for use on photovoltaic modules according to application class A of EN 61730-1:2007. NOTE For junction boxes according to application classes B and C of EN 61730-1:2007 in photovoltaic-systems, this standard can be used as a guideline.
Anschlussdosen für Photovoltaik-Module
Boîtes de jonction pour modules photovoltaïques
Priključnice fotonapetostnih modulov
Ta evropski standard velja za priključnice do 1 500 V DC za uporabo pri fotonapetosnih modulih v skladu z razredom uporabe A EN 61730-1:2007.
OPOMBA: Za priključnice v skladu z razredi uporabe B in C EN 61730-1:2007 v fotonapetostnih sistemih se lahko ta standard uporabi kot smernica.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2011
3ULNOMXþQLFHIRWRQDSHWRVWQLKPRGXORY
Junction boxes for photovoltaic modules
Anschlussdosen für Photovoltaik-Module
Boîtes de connexion pour modules photovoltaïques
Ta slovenski standard je istoveten z: EN 50548:2011
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50548
NORME EUROPÉENNE
June 2011
EUROPÄISCHE NORM
ICS 27.160
English version
Junction boxes for photovoltaic modules
Boîtes de jonction pour modules Anschlussdosen für Photovoltaik-Module
photovoltaïques
This European Standard was approved by CENELEC on 2011-02-14. 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, Croatia, 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
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50548:2011 E
Contents
Foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Constructional requirements and performance .10
4.1 General .10
4.2 Marking and identification .11
4.3 Protection against electric shock .12
4.4 Terminations and connection methods .12
4.5 Connectors .12
4.6 Cable .13
4.7 Resistance to ageing .13
4.8 General design .13
4.9 Degree of protection (IP) .13
4.10 Dielectric strength .13
4.11 Range of ambient temperature .14
4.12 Cable anchorage .14
4.13 Mechanical strength .14
4.14 Clearances and creepage distances .14
4.15 Insulation .15
4.16 Insulation parts .16
4.17 Current carrying parts and resistance against corrosion .16
4.18 Sealing .17
4.19 Bypass-diode .17
4.20 Knock-out inlets (outlets) intended to be removed by mechanical impact .17
5 Tests .17
5.1 General .17
5.2 Preparation of specimens .18
5.3 Performance of tests .20
5.4 Test schedule .30
Annex A (normative) Symbol "Do not disconnect under load" .39
Bibliography .40
- 3 - EN 50548:2011
Figures
Figure 1 – Thermal cycling test . 37
Figure 2 – Humidity-freeze cycle . 37
Figure 3 – Typical arrangement for the cable anchorage pull test . 38
Figure 4 – Typical arrangement for torsion test. 38
Figure A.1 – Symbol "Do not disconnect under load" . 39
Tables
Table 1 – Rated impulse voltage . 15
Table 2 – Number of specimen . 18
Table 3 – Values of torque for screw-type clamping units . 19
Table 4 – Pull forces for cord anchorage . 28
Table 5 – Values for torsion test . 29
Table 6 – Marking, information, documentation, test group A . 30
Table 7 – Material test, test group B (single tests) . 31
Table 8 – Constructional requirements, test group C (single tests) . 32
Table 9 – Mechanical tests, test group D (single tests) . 33
Table 10 – Test sequence I, test group E (tests to be performed consecutively in this order) . 34
Table 11 – Test sequence II, test group F (tests to be performed consecutively in this order) . 35
Table 12 – Test sequence III, test group G (tests to be performed consecutively in this order) . 35
Table 13 – Test sequence IV, test group H (tests to be performed consecutively in this order) . 36
Table 14 – Reverse current test, test group I . 36
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 82, Solar
photovoltaic energy systems.
It was submitted to the Formal Vote and was approved by CENELEC as EN 50548 on
2011-02-14.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2012-02-14
– latest date by which the national standards conflicting
(dow) 2014-02-14
with the EN have to be withdrawn
__________
- 5 - EN 50548:2011
1 Scope
This European Standard applies to junction boxes up to 1 500 V DC for use on photovoltaic modules
according to application class A of EN 61730-1:2007.
NOTE For junction boxes according to application classes B and C of EN 61730-1:2007 in photovoltaic-systems, this standard
can be used as a guideline.
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 50521, Connectors for photovoltaic systems — Safety requirements and tests
EN 60060-1, High-voltage test techniques — Part 1: General definitions and test requirements
(IEC 60060-1)
EN 60068-1, Environmental testing — Part 1: General and guidance (IEC 60068-1)
EN 60068-2-14:2009, Environmental testing — Part 2—14: Tests — Test N: Change of temperature
(IEC 60068-2-14:2009)
EN 60068-2-70, Environmental testing — Part 2: Tests — Test Xb: Abrasion of markings and
letterings caused by rubbing of fingers and hands (IEC 60068-2-70)
EN 60068-2-75, Environmental testing — Part 2—75: 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 60352-2, Solderless connections — Part 2: Crimped connections — General requirements, test
methods and practical guidance (IEC 60352-2)
EN 60512-12-1, Connectors for electronic equipment — Tests and measurements —
Part 12—1: Soldering tests — Test 12a: Solderability, wetting, solder bath method (IEC 60512-12-1)
EN 60512-12-2, Connectors for electronic equipment — Tests and measurements —
Part 12-2: Soldering tests — Test 12b: Solderability, wetting, soldering iron method (IEC 60512-12-2)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 60664-1:2007, Insulation coordination for equipment within low-voltage systems —
Part 1: Principles, requirements and tests (IEC 60664-1:2007)
EN 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 60695-11-10, Fire hazard testing — Part 11-10: Test flames — 50 W horizontal and vertical flame
test methods (IEC 60695-11-10)
EN 60695-11-20:1999, Fire hazard testing — Part 11-20: Test flames — 500 W flame test methods
(IEC 60695-11-20:1999)
EN 60947-7-1, Low-voltage switchgear and controlgear — Part 7-1: Ancillary equipment — Terminal
blocks for copper conductors (IEC 60947-7-1)
EN 60998-2-1, Connecting devices for low-voltage circuits for household and similar purposes —
Part 2-1: Particular requirements for connecting devices as separate entities with screw-type clamping
units (IEC 60998-2-1)
EN 60998-2-2, Connecting devices for low-voltage circuits for household and similar purposes —
Part 2-2: Particular requirements for connecting devices as separate entities with screwless-type
clamping units (IEC 60998-2-2)
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, 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)
EN 61032, Protection of persons and equipment by enclosures — Probes for verification (IEC 61032)
EN 61140:2002, Protection against electric shock — Common aspects for installation and equipment
(IEC 61140:2001)
EN 61730-1:2007, Photovoltaic (PV) module safety qualification — Part 1: Requirements for
construction (IEC 61730-1:2004, mod.)
EN ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer
(Shore hardness) (ISO 868:2003)
EN ISO 4892-2:2006, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps (ISO 4892-2:2006)
EN ISO 4892-3, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV
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