EN 50539-11:2013

SLOVENSKI STANDARD
01-maj-2013
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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. 21
Table 4  Environmental and material requirements . 21
Table 5  Type test requirements for SPDs . 25
Table 6  Common pass criteria for type tests . 27
Table 7  Preferred parameters for class I test . 28
Table 8  Specific source characteristics for operating duty tests . 30
Table 9  Specific source characteristics for overload behaviour tests . 30
Table 10  Test application depending on connection configuration . 38
Table 11  Dielectric withstand . 41
Table 12  Air clearances for SPDs . 42
Table 13  Creepage distances for SPDs. 43
Table 14  Relationship between material groups and classifications . 44
Table 15  Test conductors for rated load current test . 45
Table 16  Tolerances for proportional surge currents . 46
Table C.1  Temperature-rise limits . 50

- 5 - EN 50539-11:2013
Foreword
This document (EN 50539-11:2013) has been prepared by CLC/TC 37A "Low voltage surge protective
devices".
The following dates are fixed:
• latest date by which this document has to be
(dop) 2013-10-15
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards
(dow) 2015-10-15
conflicting with this document have to
be withdrawn
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.
__________
1 Scope
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
HD 588.1 S1:1991, High-voltage test techniques  Part 1: General definitions and test requirements
(IEC 60060-1:1989 + corrigendum Mar. 1990)
EN 50521, Connectors for photovoltaic systems  Safety requirements and tests
EN 60068-2-78, Environmental testing  Part 2-78: Tests  Test Cab: Damp heat, steady state
(IEC 60068-2-78)
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 61000-6-1, Electromagnetic compatibility (EMC)  Part 6-1: Generic standards  Immunity for
residential, commercial and light-industrial environments (IEC 61000-6-1)
EN 61000-6-3, Electromagnetic compatibility (EMC)  Part 6-3: Generic standards  Emission standard for
residential, commercial and light-industrial environments (IEC 61000-6-3)

- 7 - EN 50539-11:2013
EN 61180-1, High-voltage test techniques for low-voltage equipment  Part 1: Definitions, test and
procedure requirements (IEC 61180-1)
EN 61643-11:2012, Low-voltage surge protective devices  Part 11: Surge protective devices connected to
low-voltage power systems  Requirements and tests methods (IEC 61643-11:2011, mod.)
IEC 60050-151:2001, International Electrotechnical Vocabulary  Part 151: Electrical and magnetic devices
3 Terms, definitions and abbreviations
For the purposes of this document, the following terms, definitions and abbreviations apply.
3.1 Terms and definitions
3.1.1
Surge Protective Device
SPD
device that contains at least one nonlinear component that is intended to limit surge voltages and divert
surge currents
Note 1 to entry:  An SPD is a complete assembly, having appropriate connecting means.
[SOURCE: EN 61643-11:2012]
3.1.2
one-port SPD
SPD having no intended series impedance
Note 1 to entry:  A one port SPD may have separate input and output connections.
[SOURCE: EN 61643-11:2012]
3.1.3
voltage switching type SPD
SPD that has a high impedance when no surge is present, but can have a sudden change in impedance to a
low value in response to a voltage surge
Note 1 to entry:  Common examples of components used in voltage switching type SPDs are spark gaps, gas tubes and thyristors.
These are sometimes called "crowbar type" components.
[SOURCE: EN 61643-11:2012]
3.1.4
voltage limiting type SPD
SPD that has a high impedance when no surge is present, but will reduce it continuously with increased
surge current and voltage
Note 1 to entry:  Common examples of components used in voltage limiting type SPDs are varistors and avalanche breakdown diodes.
These are sometimes called "clamping type" components.
[SOURCE: EN 61643-11:2012]
3.1.5
combination type SPD
SPD that incorporates both, voltage switching components and voltage limiting components.
Note 1 to entry:  The SPD may exhibit voltage switching, limiting or both.
[SOURCE: EN 61643-11:2012]
3.1.6
modes of protection
intended current path between terminals, that contains one or more protective components, for which the
manufacturer declares a protection level, e.g. + to -, + to earth, - to earth
Note 1 to entry:  Additional terminals may be included within this current path.
[SOURCE: EN 61643-11:2012]
3.1.7
current branch of an SPD
intended current path, between two nodes that contains one or more protective components
Note 1 to entry:  A current branch of an SPD may be identical with a mode of protection of a SPD.
Note 2 to entry:  This intended current path does not include additional terminals.
Protection
mode + to -
+ / + / -
Branch 1 Branch 2
Protection
Protection
mode +/-
mode +/-
to earth
to earth
Branch 3
PE
Figure 1  Current branches vs. modes of protection of an SPD
3.1.8
nominal discharge current
I
n
crest value of the current through the SPD having a current waveshape of 8/20
[SOURCE: EN 61643-11:2012]
3.1.9
impulse discharge current for class I test
I
imp
crest value of a discharge current through the SPD with specified charge transfer Q and specified energy
W/R in the specified time
[SOURCE: EN 61643-11:2012]
3.1.10
maximum discharge current
I
max
crest value of a current through the SPD having an 8/20 waveshape and magnitude according to the
manufacturers specification.
Note 1 to entry:  I is equal to or greater than I
max n.
[SOURCE: EN 61643-11:2012]
3.1.11
maximum continuous operating voltage for PV application
U
CPV
maximum d.c. voltage which may be continuously applied to the SPDs mode of protection
3.1.12
continuous operating current for PV application
I
CPV
current flowing between active lines of the SPD when energised at U , when connected according to the
CPV
manufacturer’s instructions
3.1.13
residual current
I
PE
current flowing through the PE terminal of the SPD while energised at U when connected according to the
CPV
manufacturer’s instructions
[SOURCE: EN 61643-11:2012]
- 9 - EN 50539-11:2013
3.1.14
follow current
I
f
peak current supplied by the electrical power system and flowing through the SPD after a discharge current
impulse
Note 1 to entry: The follow current is significantly different from the continuous operating current I
CPV.
[SOURCE: EN 61643-11:2012]
3.1.15
rated load current
I
L
maximum continuous rated d.c. current that can be supplied to a resistive load connected to the protected
output of an SPD
[SOURCE: EN 61643-11:2012]
3.1.16
voltage protection level
U
p
maximum voltage to be expected at the SPD terminals due to an impulse stress with defined voltage
steepness and an impulse stress with a discharge current with given amplitude and waveshape
Note 1 to entry: The voltage protection level is given by the manufacturer and should not be exceeded by the measured limiting voltage,
determined for front-of-wave sparkover (if applicable) and the measured limiting voltage, determined from the residual voltage
measurements at amplitudes up to I and/or I for test classes I and II.
n imp
[SOURCE: EN 61643-11:2012]
3.1.17
measured limiting voltage
highest value of voltage that is measured across the terminals of the SPD during the application of impulses
of specified waveshape and amplitude
[SOURCE: EN 61643-11:2012]
3.1.18
residual voltage
U
res
crest value of voltage that appears between the terminals of an SPD due to the passage of discharge current
[SOURCE: EN 61643-11:2012]
3.1.19
1,2/50 voltage impulse
voltage impulse with a nominal virtual front time of 1,2 µs and a nominal time to half-value of 50 µs
Note 1 to entry:  Clause 6 of HD 588.1 S1:1991 defines the voltage impulse definitions of front time, time to half-value and waveshape
tolerance.
[SOURCE: EN 61643-11:2012]
3.1.20
8/20 current impulse
current impulse with a nominal virtual front time of 8 µs and a nominal time to half-value of 20 µs
Note 1 to entry:  Clause 8 of HD 588.1 S1:1991 defines the current impulse definitions of front time, time to half-value and waveshape
tolerance.
[SOURCE: EN 61643-11:2012]
3.1.21
thermal stability
SPD is thermally stable if, after heating up during the operating duty test, its temperature decreases with time
while energised at specified maximum continuous operating voltage and at specified ambient temperature
conditions
[SOURCE: EN 61643-11:2012]
3.1.22
degradation (of performance)
undesired permanent departure in the operational performance of equipment or a system from its intended
performance
[SOURCE: EN 61643-11:2012]
3.1.23
short-circuit current rating
I
SCPV
maximum prospective short-circuit current from the power system for which the SPD, in conjunction with the
disconnectors specified, is rated
[SOURCE: EN 61643-11:2012]
3.1.24
SPD disconnector (disconnector)
device for disconnecting an SPD, or part of an SPD, from the power system in the event of SPD failure
Note 1 to entry:  This disconnecting device is not required to have isolating capability for safety purposes. It is to prevent a persistent
fault on the system and is used to give an indication of an SPD’s failure. Disconnectors can be either internal (built in) or , external
(required by the manufacturer) or both. There may be more than one disconnector function, for example an over-current protection
function and a thermal protection function. These functions may be in separate units.
[SOURCE: EN 61643-11:2012]
3.1.25
degree of protection of enclosure
IP
classification preceded by the symbol IP indicating the extent of protection provided by an enclosure against
access to hazardous parts, against ingress of solid foreign objects and possibly harmful ingress of water
[SOURCE: EN 61643-11:2012]
3.1.26
type test
conformity test made on one or more items representative of the production
[SOURCE: IEC 60050-151:2001, 151-16-16]
3.1.27
routine test
test made on each SPD or on parts and materials as required to ensure that the product meets the design
specifications
[SOURCE: IEC 60050-151:2001, 151-16-17]
3.1.28
acceptance tests
contractual test to prove to the customer that the item meets certain conditions of its specification
[SOURCE: IEC 60050-151:2001, 151-16-23]
3.1.29
Impulse test classification
3.1.29.1
class I tests
tests carried out with the impulse discharge current I , with an 8/20 current impulse with a crest value
imp
equal to the crest value of I , and with a 1,2/50 voltage impulse
imp
[SOURCE: EN 61643-11:2012]
3.1.29.2
class II tests
tests carried out with the nominal discharge current I , and the 1,2/50 voltage impulse
n
[SOURCE: EN 61643-11:2012]
- 11 - EN 50539-11:2013
3.1.30
sparkover voltage or trigger voltage of a voltage switching SPD
maximum voltage value at which the sudden change from high to low impedance starts for a voltage
switching SPD
[SOURCE: EN 61643-11:2012]
3.1.31
specific energy for class I test
W/R
energy dissipated by a unit resistance of 1 Ώ with the impulse discharge current I
imp
Note 1 to entry: This is equal to the time integral of the square of the current (W/R = ∫ i dt).
[SOURCE: EN 61643-11:2012]
3.1.32
prospective short-circuit current of a power supply
I
P
current which would flow at a given location in a circuit if it were short-circuited at that location by a link of
negligible impedance
[SOURCE: EN 61643-11:2012]
3.1.33
status indicator
device that indicates the operational status of an SPD, or a part of an SPD
Note 1 to entry: Such indicators may be local with visual and/or audible alarms and/or may have remote signalling and/or output
contact capability.
[SOURCE: EN 61643-11:2012]
3.1.34
output contact
contact included in a circuit separate from the main circuit of an SPD, and linked to a disconnector or status
indicator
[SOURCE: EN 61643-11:2012]
3.1.35
multipole SPD
type of SPD with more than one mode of protection, or a combination of electrically interconnected SPDs
offered as a unit
[SOURCE: EN 61643-11:2012]
3.1.36
total discharge current
I
Total
current which flows through the earth conductor of a multipole SPD during the total discharge current test
Note 1 to entry: The aim is to take into account cumulative effects that occur when multiple modes of protection of a multipole SPD
conduct at the same time.
Note 2 to entry: I is particularly relevant for SPDs tested according to test class I, and is used for the purpose of lightning
Total
protection equipotential bonding according to EN 62305 series.
[SOURCE: EN 61643-11:2012]
3.1.37
voltage for clearance determination
U
max
highest measured voltage during surge applications according to 7.4.4 for clearance determination
[SOURCE: EN 61643-11:2012]
3.1.38
Open Circuit Mode
OCM
behaviour of a device that disconnects under overload condition
3.1.39
Short-Circuit Mode
SCM
behaviour of a device that turns to a short circuit like state under overload condition
3.2 Abbreviations
Table 1 below provides the list of abbreviations used in this document.
Table 1  List of Abbreviations
Abbreviation Description Definition/clause
General abbreviations
DUT device under test General
IP degree of protection of enclosure 3.1.25
SPD surge protective device 3.1.1
W/R specific energy for class I test 3.1.31
product marking for test classes I and II 6.1.2
T1, T2
OCM Open Circuit Mode 3.1.38
SCM Short-Circuit Mode 3.1.39
Abbreviations related to Voltage

U maximum continuous operating voltage 3.1.11
CPV
U voltage protection level 3.1.16
p
U residual voltage 3.1.18
res
U voltage for clearance determination 3.1.37
max
Abbreviations related to Current
I 3.1.9
impulse discharge current for class I test
imp
I maximum discharge current 3.1.10
max
I nominal discharge current for class II test 3.1.8
n
I follow current 3.1.14
f
I rated load current 3.1.15
L
I short-circuit current rating 3.1.23
SCPV
I continuous operating current for PV application 3.1.12
CPV
I prospective short-circuit current of the power supply 3.1.32
P
I residual current at U 3.1.13
PE CPV
I total discharge current for multipole SPD 3.1.36
Total
- 13 - EN 50539-11:2013
4 Service conditions
4.1 Voltage
The voltage applied continuously between the terminals of the Surge Protective Device (SPD) shall not
exceed its maximum continuous operating voltage U .
CPV
4.2 Air pressure and altitude
Air pressure is 80 kPa to 106 kPa. These values represent an altitude of +2 000 m to -500 m respectively.
4.3 Temperatures
− normal range: –5 °C to +40 °C
NOTE 1 This range addresses SPDs for indoor use in weather protected locations having neither temperature nor humidity control and
corresponds to the characteristics of external influences code AB4 in HD 60364-5-51.
− extended range: –40 °C to +70 °C
NOTE 2 This range addresses SPDs for outdoor use in non weather protected locations.
4.4 Humidity
− normal range: 5 % to 95 %
NOTE 1  This range addresses SPDs for indoor use in weather protected locations having neither temperature nor humidity control and
corresponds to the characteristics of external influences code AB4 in HD 60364-5-51.
− extended range: 5 % to 100 %
NOTE 2  This range addresses SPDs for outdoor use in non weather protected locations.
5 Classification
The manufacture shall classify the SPDs in accordance with the following parameters.
5.1 SPD design
5.1.1 Voltage switching
5.1.2 Voltage limiting
5.1.3 Combination
5.2 Types 1 and 2 SPDs - Class I and II tests
Information required for class I and class II tests is given in Table 2.
Table 2  Tests of types 1 and 2 SPDs
Type of SPD Tests Required information Test procedures
(see subclauses)
Type 1 Class I I 7.2.2; 7.2.3; 7.2.4
imp
Type 2 Class II I 7.2.3; 7.2.4
n
5.3 Location
5.3.1 Indoor
SPDs intended for use in enclosures and/or inside buildings or shelters.
SPDs installed in outdoor enclosures or shelters are considered for indoor use.

5.3.2 Outdoor
SPDs intended for use without enclosures and outside of buildings or shelters.
5.4 Accessibility
5.4.1 Accessible
An SPD which can be fully or partly touched by an unskilled person, without the use of a tool to open any
covers or enclosures, once installed.
5.4.2 Inaccessible
An SPD which cannot be touched by an unskilled person either due to being mounted out of reach or due to
being located within enclosures which can only be opened by using a tool, once installed.
5.5 Disconnectors (including overcurrent protection)
5.5.1 Location
5.5.1.1 Internal
5.5.1.2 External
5.5.1.3 Both (one part internal and one part external)
5.5.2 Protection functions
5.5.2.1 Thermal
5.5.2.2 Leakage current
5.5.2.3 Overcurrent
5.6 Degree of protection provided by enclosures
5.7 Temperature and humidity range
5.7.1 Normal
5.7.2 Extended
5.8 Multipole SPD
5.9 Connection configuration
NOTE  Each grey shaded rectangle represents one or more component(s) connected in parallel and/or in series.

- 15 - EN 50539-11:2013
5.9.1 I-configuration
+ / -
+ / - / PE
Figure 2  I-configuration
5.9.2 U-configuration
+ / - + / -
PE
Figure 3  U-configuration
5.9.3 L-configuration
+ / -
+ / -
PE
Figure 4  L-configuration
5.9.4 ∆-configuration
+ / -
+ / -
PE
Figure 5  ∆-configuration
5.9.5 Y-configuration
+ / - + / -
PE
Figure 6  Y-configuration
5.9.6 Single mode SPDs to be connected in Y-configuration
+ / -
+ / -
PE
Figure 7  Single mode SPDs to be connected in Y-configuration
5.10 SPD overload behaviour mode
5.10.1 Open Circuit Mode (OCM)

- 17 - EN 50539-11:2013
5.10.2 Short-Circuit Mode (SCM)
6 Requirements
6.1 General requirements
6.1.1 General
According to classification 5.9.6, if I-configuration SPDs intended to be used in Y-configuration, they shall be
tested with the parameters applicable in I- and Y-configuration.
6.1.2 Identification
The following information shall be provided by the manufacturer.
a) Markings which are mandatory on the body, or permanently attached to the body, of the SPD:
a1) manufacturer's name or trade mark and model number;
a2) maximum continuous operating voltage for PV application U (one value for each mode of
CPV
protection except if all the values are equal);
a3) the letters “PV” combined with the SPD type and discharge parameters for each mode of protection
declared by the manufacturer and printed next to each other:
• for Type I: “Type I” and “I “ and the value in kA, and/or
Imp
“T1“ (T1 in a square) and “I “ and the value in kA (e.g. PV T1 I : 10 kA);
Imp
Imp
• for Type class II: “Type II” and “I “ and the value in kA, or
n
“T2“(T2 in a square) and “I “ and the value in kA (e.g. PV T2 I : 10 kA);
n
n
a4) voltage protection level U +PE, -PE and +-, if applicable (one value for each mode of
P
protection except if all the values are equal);
a5) degree of protection provided by the enclosure (IP code) if >IP20;
a6) identification of terminals or leads (if not otherwise identified on the devices);
a7) rated load current I for one port SPDs with separate input and output terminals.
L
Where space does not allow all the above markings to be placed, the manufacturer's name or trade mark
and model number is sufficient on the SPD; other remaining required markings shall appear on the
installation instruction.
An SPD may be classified according to more than one test class (e.g. Type 1 T1 and Type2 T2). In this
case, the tests required for all declared test classes shall be performed. If in such case the manufacturer
declares only one protection level, only the highest protection level shall appear in the marking.
b) Information which shall be provided with the products to be delivered:
b1) location (see 5.3);
b2) if configuration 5.9.6 is declared, maximum continuous operating voltage for PV application U
CPV
(one value for each mode of protection except if all the values are equal);
b3) if configuration 5.9.6 is declared, voltage protection level U +PE, -PE and +-, if applicable
P
(one value for each mode of protection except if all the values are equal);
b4) number of ports;
b5) method of mounting;
b6) short-circuit current rating I
SCPV ;
b7) ratings and characteristics for external SPD disconnector(s), if required;
b8) indication of disconnector operation (if any);
b9) orientation for normal installation, if significant;
b10) installation instructions:
• type of PV systems (earthed, not earthed);

• intended connection configuration (+/- to ground, + to -);
• mechanical dimensions, lead lengths, etc.;
b11) temperature and humidity range (See 4.3 and 4.4);
b12) residual currents I a.c. and d.c.;
PE
b13) SPD overload behaviour mode;
b14) in case of SCM SPDs, special information shall be given by the SPD’s manufacturer;
b15) I , (if declared by the manufacturer);
max
b16) information about the use in earthed PV systems (see 6.2.5.2).
c) Information which shall be available in a product datasheet:
c1) total discharge current I for multipole SPDs and the corresponding test class;
Total
c2) information about replaceable parts (indicators, fuses, etc. if applicable);
c3) modes of protection (for SPDs with more than one mode of protection).
d) Information which shall be provided by the manufacturer for type testing:
d1) presence of switching component(s) (see Annex A);
d2) follow current to be expected during preconditioning test (≤ 5 A or > 5 A - see Annex A);
d3) if the status indication circuitry does not use certified components operated within their ratings, the
manufacturer shall provide the appropriate testing standards for the specific component to allow it to
be tested;
d4) isolation and dielectric withstand of separate isolated circuits.
Compliance is checked by visual inspection.
6.1.3 Marking
Markings on the device shall be indelible and legible and shall not be placed on screws or removable parts.
NOTE A plug-in SPD module is not considered a removable part.
Compliance is checked by the test in accordance with 7.3.
6.2 Electrical requirements
6.2.1 Protection against direct contact
These requirements are valid for accessible SPDs where the maximum continuous operating voltage U is
CPV
above 120 V d.c.
For protection against direct contact (inaccessibility of live parts), SPDs shall be designed in such a way that
live parts cannot be touched when the SPD is installed for the intended use.
SPDs, except SPDs classified for mounting inaccessible, shall be so designed that, when they are wired and
mounted as for normal use, live parts are not accessible, even after removal of parts which can be removed
without the use of a tool.
The connection between the earthing terminals and all accessible parts connected thereto shall be of low
resistance.
Compliance is checked by the tests according to EN 60529 and according to 7.4.1.
6.2.2 Residual current I
PE
For all SPDs with a terminal for the protective conductor, the residual current I shall be measured when all
PE
SPD terminals are connected to a power supply at the maximum continuous operating voltage (U )
CPV
according to the manufacturer’s instructions.

- 19 - EN 50539-11:2013
The residual current shall be measured when the SPD is energised at the maximum continuous operating
voltage U , and connected according to the manufacturer’s instructions.
CPV
Compliance is checked by the test according to 7.4.2.
6.2.3 Voltage protection level U
p
The measured limiting voltage(s) of the SPD shall not exceed the voltage protection level that is specified by
the manufacturer.
Compliance is checked by the test in accordance with 7.4.4.
6.2.4 Operating duty
The SPD shall be capable of withstanding specified discharge currents during application of the maximum
continuous operating voltage U , without unacceptable changes in its characteristics.
CPV
In addition voltage switching type SPDs or combination type SPDs shall be able to interrupt any follow
current up to the short-circuit current rating (I ).
SCPV
Compliance is checked by the test in accordance with 7.4.5.
6.2.5 Disconnectors and status indicators
6.2.5.1 Disconnectors
SPDs with OCM overload behaviour shall have disconnectors (which can be either internal, external or both).
Their operation shall be indicated by a corresponding status indicator.
Table 5 provides information on the inclusion of disconnectors during the various type tests. The required
behaviour of disconnectors during and after various type tests is given by items F, G, H and J of Table 6, and
is checked by the tests in accord
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