EN 50539-11:2013

Low-voltage surge protective devices - Surge protective devices for specific application including d.c. - Part 11: Requirements and tests for SPDs in photovoltaic applications

This European Standard defines the requirements and tests for SPDs intended to be installed on the d.c. side of photovoltaic installations to protect against induced and direct lightning effects. These devices are connected to d.c. power circuits of photovoltaic generators, rated up to 1 500 V. It takes into account that photovoltaic generators: • behave like current generators, • that their nominal current depends on the light intensity, • that their short-circuit current is almost equal to the nominal current, • are connected in series and/or parallel combinations leading to a great variety of voltages, currents and powers from a few hundreds of W (in residential installations) to several MW (photovoltaic fields). The very specific electrical parameters of PV installations on the d.c. side require specific test requirements for SPDs. SPDs with separate input and output terminal(s) that contain a specific series impedance between these terminal(s) (so called two port SPDs according to EN 61643-11) are currently not sufficiently covered by the requirements of this standard and require additional consideration. NOTE In general SPDs for PV applications do not contain a specific series impedance between the input/output terminals due to power efficiency considerations. SPDs complying with this standard are exclusively dedicated to be installed on the d.c. side of photovoltaic generators. PV installation including batteries and other d.c. applications are not taken into account and additional requirements and tests may be necessary for such applications. SPDs for which the manufacturers declares short circuit mode overload behaviour, shall require specific measures to ensure that such devices will not endanger the operator during maintenance and replacement due to possible d.c. arcing.

Überspannungsschutzgeräte für Niederspannung - Überspannungsschutzgeräte für besondere Anwendungen einschließlich Gleichspannung - Teil 11: Anforderungen und Prüfungen für Überspannungsschutzgeräte für den Einsatz in Photovoltaik-Installationen

Parafoudres basse tension - Parafoudres pour applications spécifiques incluant le courant continu - Partie 11: Exigences et essais pour parafoudres connectés aux installations photovoltaïques

Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - Naprave za zaščito pred prenapetostnimi udari za specifične aplikacije, vključno z enosmernimi - 11. del: Zahteve in preskusi za SPD v fotovoltaičnih aplikacijah

Ta evropski standard določa zahteve in preskuse za naprave za zaščito pred prenapetostnimi udari (SPD), namenjene za namestitev na enosmerno stran fotovoltaičnih inštalacij za zaščito pred posrednimi in neposrednimi učinki strele. Te naprave so povezane z enosmernimi napajalnimi tokokrogi fotovoltaičnih generatorjev z napetostjo do 1500 V. Standard upošteva, da za fotovoltaične generatorje velja:
• delujejo kot generatorji toka,
• njihov nazivni tok je odvisen od intenzivnosti svetlobe,
• njihov kratkostični tok je skoraj enak nazivnemu toku,
• povezani so v serijah in/ali vzporednih kombinacijah, s katerimi nastane velika raznolikost napetosti, tokov in moči, tj. od nekaj sto W (v stanovanjskih inštalacijah) do več MW (fotovoltaična polja). Zelo specifični električni parametri fotovoltaičnih inštalacij na enosmerni strani zahtevajo specifične preskusne zahteve za naprave za zaščito pred prenapetostnimi udari. Naprav za zaščito pred prenapetostnimi udari z ločenimi vhodnimi in izhodnimi terminali, ki vsebujejo posebno vzdolžno impedanco med temi terminali (v skladu s standardom EN 61643-11 t. i. naprava za zaščito pred prenapetostnimi udari z dvoje vrati), zahteve tega standarda trenutno ne zajemajo dovolj, pri čemer jih je treba dodatno obravnavati. OPOMBA Na splošno naprave za zaščito pred prenapetostnimi udari za fotovoltaične aplikacije ne vsebujejo specifične vzdolžne impedance med vhodnimi/izhodnimi terminali zaradi zadržkov v zvezi z električno učinkovitostjo. Naprave za zaščito pred prenapetostnimi udari, ki so v skladu s tem standardom, so namenjene izključno za namestitev na enosmerno stran fotovoltaičnih generatorjev. Fotovoltaične inštalacije, ki vključujejo akumulatorje in druge enosmerne aplikacije, niso upoštevane, pri čemer so za takšne uporabe morda potrebne dodatne zahteve in preskusi. Naprave za zaščito pred prenapetostnimi udari, za katere proizvajalec navaja preobremenitev kratkostičnega načina, zahtevajo posebne ukrepe za zagotovitev, da takšne naprave ne ogrožajo upravljavca med vzdrževanjem in zamenjavo zaradi morebitnega enosmernega iskrenja.

General Information

• Status: Withdrawn
• Publication Date: 21-Mar-2013
• Withdrawal Date: 14-Oct-2015
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: CLC/TC 37A - Low voltage surge protective devices
• Drafting Committee: IEC/SC 37A - IEC_SC_37A
• Parallel Committee: IEC/SC 37A - IEC_SC_37A
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 03-May-2022
• Completion Date: 03-May-2022
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN 50539-11:2013 - Low-voltage surge protective devices - Surge protective devices for specific application including d.c. - Part 11: Requirements and tests for SPDs in photovoltaic applications

Relations

• Replaced By: EN 61643-31:2019 - Low-voltage surge protective devices - Part 31: Requirements and test methods for SPDs for photovoltaic installations
• Effective Date: 18-Apr-2017
• Amended By: EN 50539-11:2013/A1:2014 - Low-voltage surge protective devices - Surge protective devices for specific application including d.c. - Part 11: Requirements and tests for SPDs in photovoltaic applications
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2013
1L]NRQDSHWRVWQHQDSUDYH]D]DãþLWRSUHGSUHQDSHWRVWQLPLXGDUL1DSUDYH]D
]DãþLWRSUHGSUHQDSHWRVWQLPLXGDUL]DVSHFLILþQHDSOLNDFLMHYNOMXþQR]
HQRVPHUQLPLGHO=DKWHYHLQSUHVNXVL]D63'YIRWRYROWDLþQLKDSOLNDFLMDK
Low-voltage surge protective devices - Surge protective devices for specific application
including d.c. - Part 11: Requirements and tests for SPDs in photovoltaic applications
Überspannungsschutzgeräte für Niederspannung - Überspannungsschutzgeräte für
besondere Anwendungen einschließlich Gleichspannung - Teil 11: Anforderungen und
Prüfungen für Überspannungsschutzgeräte für den Einsatz in Photovoltaik Installationen
Parafoudres basse tension - Parafoudres pour applications spécifiques incluant le
courant continu - Partie 11: Exigences et essais pour parafoudres connectés aux
installations photovoltaïques
Ta slovenski standard je istoveten z: EN 50539-11:2013
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50539-11
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 29.120.50
English version
Low-voltage surge protective devices -
Surge protective devices for specific application including d.c. -
Part 11: Requirements and tests for SPDs in photovoltaic applications

Parafoudres basse tension -  Überspannungsschutzgeräte für
Parafoudres pour applications spécifiques Niederspannung -
incluant le courant continu - Überspannungsschutzgeräte für
Partie 11: Exigences et essais pour besondere Anwendungen einschließlich
parafoudres connectés aux installations Gleichspannung -
photovoltaïque Teil 11: Anforderungen und Prüfungen für
Überspannungsschutzgeräte für den
Einsatz in Photovoltaik-Installationen

This European Standard was approved by CENELEC on 2012-10-15. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50539-11:2013 E
Contents
Page
Foreword . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 12
4 Service conditions . 13
4.1 Voltage . 13
4.2 Air pressure and altitude . 13
4.3 Temperatures . 13
4.4 Humidity . 13
5 Classification . 13
6 Requirements . 17
6.1 General requirements . 17
6.2 Electrical requirements . 18
6.3 Mechanical requirements . 20
6.4 Environmental and material requirements . 21
6.5 Additional requirements for specific SPD designs . 22
6.6 Additional parameter if declared by the manufacturer . 22
7 Type tests . 22
7.1 General . 22
7.2 General testing procedures . 23
7.3 Indelibility of markings . 30
7.4 Electrical tests . 31
7.5 Mechanical tests . 41
7.6 Environmental and material tests . 44
7.7 Additional tests for specific SPD designs . 45
7.8 Additional tests for specific performance . 45
8 Routine and acceptance tests . 46
8.1 Routine tests . 46
8.2 Acceptance tests . 46

- 3 - EN 50539-11:2013
Annex A (normative) Tests to determine the presence of a switching component and the magnitude of the
follow current . 47
A.1 General . 47
A.2 Test to determine the presence of a switching (crowbar) component . 47
A.3 Test to determine the magnitude of the follow current . 47
Annex B (informative) Environmental tests for outdoor SPDs. 48
B.1 Accelerated aging test with UV radiation . 48
B.2 Water immersion test . 48
B.3 Dielectric test . 48
B.4 Temperature cycle test . 49
B.5 Verification of resistance to corrosion . 49
Annex C (normative) Temperature rise limits . 50
Annex D (informative) Transient behaviour of the PV Test source in 7.2.5.1 a) . 51
D.1 Transient behaviour of the PV test source acc. to class 7.2.5.1 . 51
D.2 Test setup using a semiconductor switch to determine the transient behaviour of a PV test
source 51
D.3 Alternative test setup using a fuse . 52
Bibliography . 54

Figure 1  Current branches vs. modes of protection of an SPD . 8
Figure 2  I configuration . 15
Figure 3  U configuration . 15
Figure 4  L configuration . 15
Figure 5  ∆ configuration . 16
Figure 6  Y configuration . 16
Figure 7  Single mode SPDs to be connected in Y configuration . 16
Figure 8  I/V characteristics . 29
Figure 9  Flow chart of testing to check the voltage protection level U . 32
p
Figure 10  Flow chart of the operating duty test . 34
Figure 11  Test set-up for operating duty test . 35
Figure 12  Operating duty test timing diagram for test classes I and II . 35
Figure 13  Additional duty test timing diagram for test class I . 36
Figure 14  Sample preparation for SPD overload behaviour test (Y and U configuration) . 37
Figure 15  Sample preparation for SPD overload behaviour test (∆, L and I configuration) . 38
Figure D.1  Test setup using an adjustable semiconductor switch to determine the transient behaviour of a
PV test source . 51
Figure D.2  Time behavior of voltage and current during switch-off operation of a semiconductor switch at
a PV source I = 4 A, U = 640 V . 51
SC OC
Figure D.3  Semiconductor switch switch-off behaviour (normalised) with intersection point i(t) / u(t) . 52

Figure D.4  i/u-characteristic of the PV test source calculated from the normalised current and voltage
records in Figure D.3 . 52
Figure D.5  Test setup using a fuse to determine the transient behaviour of a PV test source . 52
Figure D.6  Normalised switch-off behaviour during operation of a fuse rated 0,1 x I at a PV test source
SCPV
with intersection point i(t) / u(t) . 53
Figure D.7  i/u-characteristic of the PV test source calculated from the normalised current and voltage
records in Figure D.6 . 53

Table 1  List of Abbreviations . 12
Table 2  Tests of types 1 and 2 SPDs . 13
Table 3  Compliant termination and connection methods.
...