prEN IEC 61643-31:2025
(Main)Low-voltage surge protective devices - Part 31: Requirements and test methods for SPDs for photovoltaic installations
Low-voltage surge protective devices - Part 31: Requirements and test methods for SPDs for photovoltaic installations
Parafoudres basse tension - Partie 31: Parafoudres pour usage spécifique y compris en courant continu - Exigences et méthodes d'essai des parafoudres pour installations photovoltaïques
Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 31. del: Zahteve in preskusne metode za SPD za fotonapetostne inštalacije
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 31. del: Zahteve
in preskusne metode za SPD za fotonapetostne inštalacije
Low-voltage surge protective devices - Part 31: Requirements and test methods for
SPDs for photovoltaic installations
Parafoudres basse tension - Partie 31: Parafoudres pour usage spécifique y compris en
courant continu - Exigences et méthodes d'essai des parafoudres pour installations
photovoltaïques
Ta slovenski standard je istoveten z: prEN IEC 61643-31:2025
ICS:
27.160 Sončna energija Solar energy engineering
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
37A/449/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61643-31 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-11-21 2026-02-13
SUPERSEDES DOCUMENTS:
37A/448/RR
IEC SC 37A : LOW-VOLTAGE SURGE PROTECTIVE DEVICES
SECRETARIAT: SECRETARY:
United States of America Mr David Richmond
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 64,TC 81
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Low-voltage surge protective devices - Part 31: Requirements and test methods for SPDs for
photovoltaic installations
PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
IEC CDV 61643-31 © IEC 2025
1 CONTENTS
3 FOREWORD . 3
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms, definitions and abbreviated terms . 8
8 3.1 Terms and definitions . 8
9 3.1.8 8
10 3.1.23 8
11 3.1.51 8
12 3.2 Acronyms and symbols . 8
13 4 Classification . 9
14 4.5 Type of SPD . 9
15 5 Void . 9
16 6 Marking and other product information . 9
17 6.1 General . 9
18 6.2 List of items . 9
19 6.2.100 Markings which are required on the body, or permanently attached to
20 the body, of the SPD: . 10
21 6.2.101 Information to be provided by the manufacturer: . 10
22 6.2.102 Information which shall be provided by the manufacturer for type
23 testing, as applicable: . 10
24 7 Service conditions . 11
25 7.1 Voltage . 11
26 8 Requirements . 11
27 8.1 General requirements . 11
28 8.3 Electrical requirements . 11
29 8.3.6 Safety performance of overstressed SPDs . 11
30 8.3.9 Behaviour under temporary overvoltages . 12
31 8.4 Mechanical requirements . 12
32 8.4.3 External connections . 12
33 8.6 Additional requirements for specific SPD designs . 12
34 8.6.1 One-port SPDs with separate input/output connections . 12
35 8.6.4 Total Discharge Current I . 12
Total
36 8.6.5 Two port SPDs . 12
37 8.6.6 Short-circuiting SPDs . 12
38 9 Tests . 12
39 9.1 Type testing procedures . 13
40 9.1.1 General . 13
41 9.3 Electrical tests . 17
42 9.3.3 Protective conductor current I . 17
PE
43 9.3.5 Operating duty test . 17
44 9.3.6 Safety performance of overstressed SPDs . 18
45 9.3.9 Behaviour under temporary overvoltages (TOVs) . 22
46 This test from IEC 61643-01 does not apply. . 22
IEC CDV 61643-31 © IEC 2025
47 9.6 Additional tests for specific SPD designs . 22
48 Subclause 9.6 of IEC 61643-01 applies with the following modification: . 22
49 9.6.1 Test for one-port SPDs with separate input/output connections . 22
50 Subclause 9.6.1. of IEC 61643-01 applies with the following modifications: . 22
51 Subclause 9.6.1.1 of IEC 61643-01 applies with the following modifications: . 22
52 Subclause 9.6.1.1.1 of IEC 61643-01 is replaced by: . 22
53 Subclause 9.6.1.2 of IEC 61643-01 does not apply. . 22
54 Subclause 9.6.1.3 of IEC 61643-01 does not apply. . 22
55 9.6.5 Test for two port SPDs only . 22
56 Subclause 9.6.5 of IEC 61643-01 does not apply. . 22
57 Annex AA (normative) Application of annexes from IEC 61643-01 . 23
58 Annex BB (normative) Test to determine the magnitude of the follow current of an
59 SPD . 24
60 Annex CC (informative) Transient behaviour of the PV test source . 25
61 CC.1 Transient behaviour of the PV test source according to 9.3.5.2 . 25
62 CC.2 Test setup using a semiconductor switch to determine the transient
63 behaviour of a PV test source . 25
64 CC.3 Alternative test setup using a fuse . 27
65 Annex DD (normative) Reduced test procedures . 29
66 Bibliography . 31
68 Figure 100 – I/U characteristics for the simulated PV-source . 15
69 Figure 101 – Example of sample preparation for SPD dedicated overstress test . 22
70 Figure CC.1 – Test setup using an adjustable semiconductor switch to determine the
71 transient behaviour of a PV test source . 27
72 Figure CC.2 – Time behaviour of voltage and current during disconnection operating
73 time of a semiconductor switch at a PV-source I = 4 A, open-circuit voltage = 640 V . 28
SC
74 Figure CC.3 – Semiconductor disconnection behaviour (normalized) with intersection
75 point i(t) / u(t) . 28
76 Figure CC.4 – I/U-characteristic of the PV test source calculated from the normalized
77 current and voltage records in Figure C.3 . 29
78 Figure CC.5 – Test setup using a fuse to determine the transient behaviour of a PV
79 test source . 29
80 Figure CC.6 – Normalized disconnection behaviour during operation of a fuse rated
81 0,1 x I at a PV test source with intersection point i(t) and u(t) . 30
SCPV
82 Figure CC.7 – I/U-characteristic of the PV test source calculated from the normalized
83 current and voltage records in Figure CC.6 . 30
85 Table 1 – List of Acronyms and symbols . 10
86 Table 100 – Type test requirements for SPDs . 17
87 Table 102 – Specific power source characteristics for dedicated overstress test . 21
88 Table AA.1 – Application of annexes from IEC 61643-01 . 25
89 Table DD.1 – Reduced test procedure for SPDs complying with IEC 61643-31:2018 . 32
IEC CDV 61643-31 © IEC 2025
92 INTERNATIONAL ELECTROTECHNICAL COMMISSION
93 ____________
95 LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
97 Part 31: Surge protective devices connected to photovoltaic (PV)
98 installations – Requirements and test methods
100 FOREWORD
101 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
102 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
103 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
104 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
105 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
106 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
107 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
108 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
109 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
110 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
111 consensus of opinion on the relevant subjects since each technical committee has representation from all
112 interested IEC National Committees.
113 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
114 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
115 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
116 misinterpretation by any end user.
117 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
118 transparently to the maximum extent possible in their national and regional publications. Any divergence between
119 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
120 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
121 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
122 services carried out by independent certification bodies.
123 6) All users should ensure that they have the latest edition of this publication.
124 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
125 members of its technical committees and IEC National Committees for any personal injury, property damage or
126 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
127 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
128 Publications.
129 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
130 indispensable for the correct application of this publication.
131 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
132 patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
133 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
134 may be required to implement this document. However, implementers are cautioned that this may not represent
135 the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
136 shall not be held responsible for identifying any or all such patent rights.
137 IEC 61643-31 has been prepared by subcommittee 37A: Low-voltage surge protective devices,
138 of IEC technical committee 37: Surge arresters. It is an International Standard.
139 This second edition cancels and replaces the first edition published in 2018. This edition
140 constitutes a technical revision.
141 This edition includes the following significant technical changes with respect to the previous
142 edition:
143 a) Specific requirements for SPDs for PV applications are now contained in this document,
144 whereas the common requirements for all SPDs are now contained in IEC 61643-01;
145 b) Clarification on test application either to a complete SPD, to a "mode of protection", or to a
146 complete "SPD assembly";
IEC CDV 61643-31 © IEC 2025
147 c) Additional measurement of voltage protection level on "combined modes of protection"
148 between live conductors and PE;
149 d) Additional duty test for T1 and T2 SPDs with follow current to check variation of the follow
150 current value at lower impulse currents;
151 e) Modified and amended short circuit current test requirements to better cover up to date
152 internal SPD disconnector technologies;
153 f) Improved dielectric test requirements for the SPD's main circuits and added dielectric test
154 requirements for "electrically separated circuits";
155 g) Additional clearance requirements for "electrically separated circuits".
156 The requirements of this document supplement, modify or replace certain of the general
157 requirements contained in IEC 61643-01 and shall be read and applied together with the latest
158 edition of IEC 61643-01, as indicated by the undated normative reference in Clause 2 of this
159 document.
160 Numbering of clauses follows the numbering of IEC 61643-01, but, dependent on the application
161 of clauses from IEC 61643-01, does not necessarily follow sequentially.
162 If a clause in IEC 61643-01 is not explicitly called up or referred to in this document, then this
163 clause does not apply to SPDs covered by this document. Any instructions in this document
164 calling up clauses from IEC 61643-01 are written in Italic type.
165 NOTE In other words, if e.g. Clause 4 is called up in this document all subclauses of Clause 4 of IEC 61643-01 are
166 applied without modification. But, if e.g. some modifications are required on subclauses of Clause 9 of IEC 61643-
167 01, then the relevant second level subclauses of IEC 61643-01 (e.g. 9.3, 9.5 etc.) are called up separately and it is
168 indicated how they are applied.
169 The numbering of additional subclauses to IEC 61643-01 in this document starts with the
170 number 100 in the last section of the subclause added (see e.g. 4.100). The numbering of
171 additional tables and figures to IEC 61643-01 in this document starts with the number 100.
172 The text of this International Standard is based on the following documents:
Draft Report on voting
37A/XX/FDIS 37A/XX/RVD
174 Full information on the voting for its approval can be found in the report on voting indicated in
175 the above table.
176 The language used for the development of this International Standard is English.
177 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
178 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
179 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
180 described in greater detail at www.iec.ch/publications.
181 A list of all parts of the IEC 61643 series can be found, under the general title Low-voltage
182 surge protective devices, on the IEC website.
183 The committee has decided that the contents of this document will remain unchanged until the
184 stability date indicated on the IEC website under webstore.iec.ch.ch in the data related to the
185 specific document. At this date, the document will be
186 • reconfirmed,
187 • withdrawn, or
188 • revised.
IEC CDV 61643-31 © IEC 2025
189 •
IEC CDV 61643-31 © IEC 2025
190 INTRODUCTION
191 It has been assumed in the drafting of this International Standard that the execution of its
192 provisions is entrusted to appropriately qualified and experienced persons.
193 This document recognizes the internationally accepted level of protection against hazards such
194 as electrical, mechanical, thermal, fire and radiation of SPDs when operated as in normal use
195 taking into account the manufacturer's instructions. It also covers abnormal situations that can
196 be expected in practice.
197 This document takes into account the requirements of IEC 60364 as far as possible so that
198 there is compatibility with the wiring rules when the SPD is connected to the supply mains.
199 However, national wiring rules may differ.
200 If the intended applications of an SPD are covered by different parts of the IEC 61643-X series,
201 all relevant parts shall be applied, as far as is reasonable.
202 This part of IEC 61643 addresses safety and performance tests for surge protective devices
203 (SPDs) to be installed on the DC side of photovoltaic installations in conjunction with IEC 61643-
204 01.
205 This document addresses T1 SPD, T2 SPD and T3 SPD according to IEC 61643-01.
206 The specific electrical parameters of PV installations on the DC side require specific test
207 requirements for SPDs. These test requirements take into account that:
208 • photovoltaic generators behave like current generators,
209 • the output current of photovoltaic generators depends on the incident light intensity and
210 temperature,
211 • their short-circuit current of photovoltaic generators is slightly higher than the operating
212 output current,
213 • photovoltaic modules are connected in series and/or parallel combinations, leading to a
214 great variety of voltages, currents and powers from a few hundreds of W (in residential
215 installations) to several MW (photovoltaic power plants).
216 IEC 61643-32 addresses the selection and application principles of SPDs on the DC side of
217 photovoltaic installations.
IEC CDV 61643-31 © IEC 2025
219 LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
221 Part 31: Surge protective devices connected to photovoltaic (PV)
222 installations – Requirements and test methods
226 1 Scope
227 This document, together with IEC 61643-01, is applicable to devices for surge protection
228 against indirect and direct effects of lightning or other transient overvoltages.
229 These devices are intended to be connected to the DC side of photovoltaic installations rated
230 up to 1 500 V DC. Performance and safety requirements, tests and ratings are specified in this
231 document. These devices contain at least one nonlinear component and are intended to limit
232 surge voltages and divert surge currents.
233 SPDs complying with this standard are exclusively dedicated to be installed on the DC side of
234 photovoltaic generators and the DC side of PV inverters.
235 SPDs for PV systems with energy storage (e.g. batteries, capacitor banks) are not covered in
236 this standard.
237 SPDs with separate input and output terminals that contain specific series impedance between
238 these terminal(s) (so called two-port SPDs according to IEC 61643-01) are not covered.
239 SPDs compliant with this standard are designed to be permanently connected, where
240 connection and disconnection of fixed SPDs can only be done using a tool. This standard does
241 not apply to portable SPDs.
242 NOTE 1 In general SPDs for PV applications do not contain a specific series impedance between the input/output
243 terminals due to power efficiency considerations.
244 NOTE 2 Wherever reference is made to the electric power system or the power system within this document, this
245 refers to the DC side of the photovoltaic installation.
246 2 Normative references
247 For the purposes of this document the normative references given in IEC 61643-01 with the
248 following additions apply.
249 The following documents are referred to in the text in such a way that some or all of their content
250 constitutes requirements of this document. For dated references, only the edition cited applies.
251 For undated references, the latest edition of the referenced document (including any
252 amendments) applies.
253 IEC 61643-01, Low-voltage surge protective devices – Part 01: General requirements and test
254 methods
255 IEC 62852, Connectors for DC-application in photovoltaic systems - Safety requirements and
256 tests
IEC CDV 61643-31 © IEC 2025
257 3 Terms, definitions and abbreviated terms
258 Clause 3 of IEC 61643-01 applies with the following replacements:
259 3.1 Terms and definitions
260 Sublause 3.1 of IEC 61643-01 applies with the following replacements:
261 3.1.8
262 Subclause 3.1.8 of IEC 61643-01 is replaced by the following:
263 continuous current for PV application
264 I
CPV
265 current flowing through the plus and minus terminals of the SPD while energized at U
CPV
266 [SOURCE: IEC 61643-01:2024, 3.1.08, modified (term originally referred to as I )]
C
267 3.1.23
268 Subclause 3.1.23 of IEC 61643-01 is replaced by the following:
269 maximum continuous operating voltage for PV application
270 U
CPV
271 maximum DC voltage which may be continuously applied to the SPD’s mode of protection
272 [SOURCE: IEC 61643-01:2024, 3.1.23, modified (term originally referred to as U )]
C
273 3.1.51
274 Subclause 3.1.51 of IEC 61643-01 is replaced by the following:
275 short-circuit current rating of the SPD
276 I
SCPV
277 maximum prospective short-circuit current from the power system for which the SPD, in
278 conjunction with the disconnector specified, is rated
279 [SOURCE: IEC 61643-01:2024, 3.1.51, modified (term originally referred to as I )]
SCCR
280 3.2 Acronyms and symbols
281 Sublause 3.2 of IEC 61643-01 applies with the following replacements:
282 Table 1 – List of Acronyms and symbols
Acronym/symbol Description Definition/clause
Acronyms and symbols related to voltage
U maximum continuous operating voltage 3.1.23
CPV
Acronyms and symbols related to current
I continuous current for PV application 3.1.8
CPV
I
short-circuit current rating 3.1.51
SCPV
IEC CDV 61643-31 © IEC 2025
283 4 Classification
284 Clause 4 of IEC 61643-01 applies with the following replacements and additions:
285 4.5 Type of SPD
286 Sublause 4.5 of IEC 61643-01 applies with the following replacement:
287 The terms “T1 SPD”, “T2 SPD” and “T3 SPD” are replaced by “PV T1 SPD”, “PV T2 SPD” and
288 “PV T3 SPD”, accordingly.
289 5 Void
290 6 Marking and other product information
291 Clause 6 of IEC 61643-01 applies with the following replacements and additions.
292 6.1 General
293 Sublause 6.1 of IEC 61643-01 applies with the following replacement:
294 The term “T1 SPD and T2 SPD” is replaced by “PV T1 SPD and PV T2 SPD”.
295 6.2 List of items
296 Sublause 6.2 of IEC 61643-01 applies with the following replacements, additions and deletion:
297 The following information from the list of items in 6.2 of IEC 61643-01 and any additional items
298 specified shall be provided as required below.
299 Item 2) from 6.2 of IEC 61643-01 is replaced by:
300 The letters “PV” combined with the SPD Type classification:
301 • for T1 SPD: “PV T1” (T1 in a square)
302 • for T2 SPD: “PV T2” (T2 in a square)
303 • for T3 SPD: “PV T3” (T3 in a square)
304 NOTE 1 In Japan SPDs can be marked "PV class I" instead of PV T1, "PV class II" instead of PV T2 and "PV
305 class III" instead of PV T3.
306 Item 4) from 6.2 of IEC 61643-01 applies with the following replacement:
307 U is replaced by U .
C CPV
308 Item 5) from 6.2 of IEC 61643-01 does not apply.
309 Item 9) from 6.2 of IEC 61643-01 does not apply.
310 Item 10) from 6.2 of IEC 61643-01 does not apply.
311 Item 17) from 6.2 of IEC 61643-01 applies with the following replacement:
312 I is replaced by I .
SCCR SCPV
IEC CDV 61643-31 © IEC 2025
313 Item 24) from 6.2 of IEC 61643-01 applies with the following replacement:
314 I is replaced by I .
C CPV
315 Item 25) from 6.2 of IEC 61643-01 applies with the following addition:
316 The AC and DC values or a curve shall be provided in accordance with 9.3.3.1.
317 Item 26) from 6.2 of IEC 61643-01 does not apply.
318 Item 30) from 6.2 of IEC 61643-01 does not apply.
319 Item 31) from 6.2 of IEC 61643-01 applies with the following deletion:
320 The phrase “(if declared by the manufacturer)” is deleted.
321 Item 32) from 6.2 of IEC 61643-01 does not apply.
322 Item 33) from 6.2 of IEC 61643-01 does not apply.
323 Item 35) from 6.2 of IEC 61643-01 does not apply.
324 Item 43) from 6.2 of IEC 61643-01 does not apply.
325 100) Type of PV system earthing for which the SPD main circuit is designed (e.g. earthed,
326 unearthed or both).
327 101) Follow current to be expected (≤ 5 A or > 5 A: see Annex BB)
328 6.2.100 Markings which are required on the body, or permanently attached to the body,
329 of the SPD:
330 6.2.100.1 Markings which shall be visible after installation:
331 Items 1) to 3) from 6.2 of IEC 61643-01 shall be visible after installation.
332 6.2.100.2 Markings which are not required to be visible after installation:
333 Items 4) and 6) to 8) from 6.2 of IEC 61643-01 shall be visible on the SPD but are not required
334 to be visible after installation.
335 6.2.101 Information to be provided by the manufacturer:
336 Items from 1) to 4), from 6) to 8), from 11) to 25), from 27) to 29), 31), 34) and from 36) to 40)
337 from 6.2 of IEC 61643-01 and item 100) shall be provided, if applicable, and as amended
338 according 6.2 of this document.
339 6.2.102 Information which shall be provided by the manufacturer for type testing, as
340 applicable:
341 Items 41) and 42) from 6.2 of IEC 61643-01 and item 101) shall be provided, if applicable, and
342 as amended according 6.2 of this document.
IEC CDV 61643-31 © IEC 2025
343 7 Service conditions
344 Clause 7 of IEC 61643-01 applies with the following replacements:
345 7.1 Voltage
346 Sublause 7.1 of IEC 61643-01 applies with the following replacement:
347 U is replaced by U .
C CPV
348 8 Requirements
349 Clause 8 of IEC 61643-01 applies with the following replacements, additions and deletions:
350 In the full clause, U is replaced by U
C CPV.
351 8.1 General requirements
352 Sublause 8.1 of IEC 61643-01 applies with the following deletion:
353 The phrase “(if I is declared by the manufacturer)" is deleted.
Total
354 8.3 Electrical requirements
355 Subclause 8.3 from IEC 61643-01 applies with the following exemption and addition:
356 8.3.6 Safety performance of overstressed SPDs
357 Subclause 8.3.6 from IEC 61643-01 applies with the following exemption and addition:
358 8.3.6.4 Dedicated overstress behaviour
359 Subclause 8.3.6.4 from IEC 61643-01 applies with the following exemption and addition:
360 An SPD shall reach its end-of-life without causing a hazardous condition or withstand the
361 declared I which may occur during an SPD failure.
SCPV
362 Compliance is checked by the test in accordance with 9.3.6.4.
363 Due to possible hazard to people and property resulting from the DC arcing during replacement,
364 plug-in Short-Circuit Mo
...
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