FprHD 60364-7-712:2025

SLOVENSKI STANDARD
oSIST prHD 60364-7-712:2023
01-september-2023
Nizkonapetostne električne inštalacije - 7-712. del: Zahteve za posebne inštalacije
ali lokacije - Sončna fotonapetostna (PV) napajalna omrežja
Low voltage electrical installations - Part 7-712: Requirements for special installations or
locations - Solar photovoltaic (PV) power supply systems
Installations électriques à basse tension - Partie 7-712: Exigences applicables aux
installations ou emplacements spéciaux - Installations d'énergie solaire photovoltaïque
(PV)
Ta slovenski standard je istoveten z: prHD 60364-7-712:2023
ICS:
27.160 Sončna energija Solar energy engineering
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
oSIST prHD 60364-7-712:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prHD 60364-7-712:2023
oSIST prHD 60364-7-712:2023
64/2628/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60364-7-712 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-07-07 2023-09-29
SUPERSEDES DOCUMENTS:
64/2514/CD, 64/2620/CC
IEC TC 64 : ELECTRICAL INSTALLATIONS AND PROTECTION AGAINST ELECTRIC SHOCK
SECRETARIAT: SECRETARY:
Germany Mr Wolfgang Niedenzu
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 8,SC 8B,TC 20,TC 22,SC 22F,SC 23E,SC
23K,SC 32B,SC 37A,TC 82,TC 85,TC 120,TC
Other TC/SCs are requested to indicate their interest, if any, in this
121,SC 121A,SC 121B,PC 128,SyC LVDC,SyC
CDV to the secretary.
Smart Energy
FUNCTIONS CONCERNED:
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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 electrical installations - Part 7-712: Requirements for special installations or locations -
Solar photovoltaic (PV) power supply systems

PROPOSED STABILITY DATE: 2028
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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NOTE FROM TC/SC OFFICERS:
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1 CONTENTS
3 FOREWORD . 7
4 INTRODUCTION . 9
5 712 Solar photovoltaic (PV) power supply installations . 11
6 712.1 Scope . 11
7 712.2 Normative references . 11
8 712.3 Terms and definitions. 13
9 712.3.1 13
10 712.31 Purposes, supplies and structure . 19
11 712.31.101 PV installation configurations . 19
12 712.4 Protection for safety . 31
13 712.4.101 General . 31
14 712.41 Protection against electric shock . 31
15 712.410 Introduction . 31
16 712.410.3 General Requirements . 31
17 712.411 Protective measure: automatic disconnection of supply . 32
18 712.411.3 Requirements for fault protection . 32
19 712.412 Protective measure: double or reinforced insulation . 34
20 712.412.2 Requirements for basic protection and fault protection . 34
21 712.414 Protective measure: extra-low-voltage provided by SELV and PELV . 35
22 712.414.101 . 35
23 712.42 Protection against thermal effects . 35
24 712.421 Protection against fire caused by electrical equipment . 35
25 712.421.101 . 35
26 712.421.102 Provisions against the thermal effects due to insulation
27 faults on the DC side . 36
28 712.43 Protection against overcurrent . 37
29 712.430 . 37
30 712.430.3 General requirements . 37
31 712.432 Nature of protective devices . 38
32 712.432.101 . 38
33 712.433 Protection against overload current . 38
34 712.433.1 Coordination between conductors and overload protective devices . 38
35 712.433.2 Position of devices for overload protection . 41
36 712.433.101 Protection of PV array cable . 42
37 712.433.102 Protection of PV AC supply cable . 42
38 712.434 Protection against short-circuit currents . 42
39 712.434.101 . 42
40 712.44 Protection against voltage disturbances and electromagnetic disturbances . 42
41 712.443 Protection against transient overvoltages of atmospheric origin or due
42 to switching . 42
43 712.443.4 Overvoltage control . 42
44 712.443.5 Risk assessment method . 42
45 712.5 Selection and erection of electrical equipment . 43
46 712.51 Common rules . 43
47 712.51.101 43
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48 712.510 Introduction . 43
49 712.510.3 General . 43
50 712.511 Compliance with standards . 43
51 712.511.1 43
52 712.512 Operational conditions and external influences . 44
53 712.512.1 Operational conditions . 44
54 712.513 Accessibility . 45
55 712.513.101 . 45
56 712.514 Identification . 45
57 712.514.101 Safety marking . 45
58 712.514.102 Live parts marking . 46
59 712.514.103 Isolation marking . 46
60 712.514.104 Equipment marking . 46
61 712.514.105 Requirements for signs . 46
62 712.514.106 Labelling of disconnection devices . 46
63 712.514.107 Documentation . 46
64 712.514.2 Wiring systems . 46
65 712.515 Prevention of mutual detrimental influence . 47
66 712.515.101 . 47
67 712.515.102 Selection and erection of PV modules in relation with
68 external influences . 47
69 712.52 Wiring systems . 48
70 712.521 Types of wiring systems . 48
71 712.521.101 Type . 48
72 712.521.102 . 48
73 712.521.103 General . 48
74 712.521.104 Wiring loops . 49
75 712.521.105 String wiring and DCU string wiring . 49
76 712.521.106 String wiring harness . 49
77 712.522 Selection and erection of wiring systems in relation to external
78 influences . 51
79 712.522.101 Installation method . 51
80 712.523 Current-carrying capacities . 51
81 712.523.101 . 51
82 712.524 Cross-sectional areas of conductors . 51
83 712.524.1 51
84 712.526 Electrical connections . 53
85 712.526.101 . 53
86 712.526.102 Connectors on the DC side . 53
87 712.526.103 Wiring installation in combiner boxes . 53
88 712.527 Selection and erection of wiring systems to minimize spread of fire . 53
89 712.53 Devices for protection for safety, isolation, switching, control and monitoring . 53
90 712.531 Equipment for protection against electric shock . 53
91 712.531.2 Devices for automatic disconnection of supply . 53
92 712.532 Devices and precautions for protection against thermal effects . 54
93 712.532.101 Protection against thermal effects due to insulation faults
94 which includes the use of an IMD . 54
95 712.533 Devices for protection against overcurrent . 54
96 712.533.1 General requirements . 54

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97 712.534 Devices for protection against transient overvoltages . 55
98 712.534.1 General . 55
99 712.534.4 Selection and erection of SPDs . 55
100 712.536 Isolation and switching . 56
101 712.536.2 Isolation. 56
102 712.537 Monitoring . 58
103 712.537.1 General . 58
104 712.54 Earthing arrangements and protective conductors . 60
105 712.542 Earthing arrangements . 60
106 712.542.101 Separate earth electrode . 60
107 712.542.102 Bonding of PV metal structures . 60
108 712.544 Protective bonding conductors . 60
109 712.544.2 Protective bonding conductors for supplementary bonding . 60
110 712.55 Other equipment . 61
111 712.55.101 Measures to prevent DC on-load interruption . 61
112 712.55.102 Blocking diodes . 61
113 712.6 Inspection and testing . 61
114 Annex A (normative) Calculation of U and I . 62
OC MAX SC MAX
115 A.1 Calculation of U . 62
OC MAX
116 A.2 Calculation of I . 63
SC MAX
117 Annex B (informative) Examples of signs . 64
118 B.1 General . 64
119 Annex C (informative) Performance issues . 65
120 Annex D (informative) Further examples of architecture configurations . 66
121 D.1 General . 66
122 Annex E (informative) Current carrying capacities of PV cables - Temperature
123 correction factors . 67
124 Annex F (informative) List of notes concerning certain countries . 69
125 Bibliography . 70
127 Figure 1 – General functional configuration of a PV installation with energy storage . 20
128 Figure 2 – DCU string circuit: defined by output of DC/DC converters in serial
129 connection (purple) . 21
130 Figure 3 – PCE using an external transformer . 22
131 Figure 4 – Example of PV array diagram – single string case . 24
132 Figure 5 – Example of PV array diagram – multiple parallel string case . 25
133 Figure 6 – Example of PV array diagram – multiple parallel DCU string case . 26
134 Figure 7 – Example of PV array diagram – multiple parallel string case with array
135 divided into subarrays . 27
136 Figure 8 – Example of PV array using a PCE with multiple separate DC inputs . 28
137 Figure 9 – Example of PV array using a PCE with multiple DC inputs internally
138 connected to a common DC bus . 29
139 Figure 10 – Example of fault protection on DC bus circuit using an IT system . 33
140 Figure 11 – Example of fault protection on DC bus circuit with non-separated PCE
141 connected to a TT or TN system . 33
142 Figure 12 – Example of fault protection on DC bus circuit with separated PCE using a
143 TT or TN system . 34

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144 Figure 13 – Example of a PV array diagram where strings are grouped under one
145 OCPD per group . 41
146 Figure 14 – Example of a sign indicating the presence of a photovoltaic installation . 45
147 Key: 49
148 Figure 15 – PV string wiring and DCU string wiring with minimum loop area . 49
149 Figure 16 – String wiring harness. 50
150 Figure B.1 – Example of sign required on PV array combiner boxes . 64
151 Figure D.1 – Further architecture configurations of the DC bus . 66
th
152 Figure E.1 – IEC TS 63126:2020 Figure A.3 98 percentile temperature for an open-
153 rack, or thermally unrestricted, glass superstrate, polymer backsheet module . 68
th
154 Figure E.2 – IEC TS 63126:2020 Figure A.4 98 percentile temperature for a close-
155 roof mounted glass superstrate, polymer backsheet module . 68
157 Table 1 – Calculation of the critical length L . 43
crit
158 Table 2 – Minimum current rating of circuits . 52
159 Table 3 – Isolation devices in PV array installations . 57
160 Table 4 – Minimum insulation resistance thresholds for detection of failure of
161 insulation to earth . 58
162 Table 5 – Response time limits for sudden changes in residual current . 59
163 Table E.1 – IEC 62930:2017 Table A.3 current carrying capacity of PV cables . 67
164 Table E.2 – IEC 62930:2017 Table A.4 current rating conversion factors for different
165 ambient temperatures . 67
166 Table F.1 – List of notes concerning certain countries . 69
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169 INTERNATIONAL ELECTROTECHNICAL COMMISSION
170 ____________
173 LOW VOLTAGE ELECTRICAL INSTALLATIONS –
175 Part 7-712: Requirements for special installations or locations –
176 Solar photovoltaic (PV) power supply installations
178 FOREWORD
179 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
180 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
181 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
182 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
183 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
184 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
185 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
186 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
187 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
188 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
189 consensus of opinion on the relevant subjects since each technical committee has representation fro m all
190 interested IEC National Committees.
191 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
192 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of I EC
193 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
194 misinterpretation by any end user.
195 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
196 transparently to the maximum extent possible in their national and regional publications. Any divergence between
197 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
198 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
199 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
200 services carried out by independent certification bodies.
201 6) All users should ensure that they have the latest edition of this publication.
202 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
203 members of its technical committees and IEC National Committees for any personal injury, property damage or
204 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
205 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
206 Publications.
207 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
208 indispensable for the correct application of this publication.
209 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
210 rights. IEC shall not be held responsible for identifying any or all such patent rights.
211 IEC 60364-76712 has been prepared by IEC technical committee 64: electrical installations and
212 protection against electric shock. It is an International Standard.
213 This third edition cancels and replaces the second edition published in 2017. This edition
214 constitutes a technical revision.
215 This edition includes the following significant technical changes with respect to the previous
216 edition:
217 a) The technical content has been extensively revised and expanded, taking into account
218 experience gained in the construction and operation of PV installations, and developments
219 made in technology, since the second edition of this standard was published.
220 b)
221 The text of this International Standard is based on the following documents:

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Draft Report on voting
XX/XX/FDIS XX/XX/RVD
223 Full information on the voting for its approval can be found in the report on voting indicated in
224 the above table.
225 The language used for the development of this International Standard is English.
226 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
227 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
228 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
229 described in greater detail at www.iec.ch/publications.
230 The committee has decided that the contents of this document will remain unchanged until the
231 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
232 specific document. At this date, the document will be
233 • reconfirmed,
234 • withdrawn,
235 • replaced by a revised edition, or
236 • amended.
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238 INTRODUCTION
240 For the purpose of this part of IEC 60364 (IEC 60364-7-712), the requirements of the general
241 parts 1 to 6 and part 8 of IEC 60364 apply.
242 The IEC 60364-7-7XX parts of IEC 60364 contain particular requirements for special
243 installations or locations which are based on the requirements of the general parts of IEC 60364
244 (IEC 60364-1 to IEC 60364-6 and IEC 60364-8). These IEC 60364-7-7XX parts are considered
245 in conjunction with the requirements of the general parts.
246 The particular requirements of this part of IEC 60364 supplement, modify or replace certain of
247 the requirements of the general parts of IEC 60364 being valid at the time of publication of this
248 part. The absence of reference to the exclusion of a part or a clause of a general part means
249 that the corresponding clauses of the general part are applicable (undated reference).
250 Requirements of other 7XX parts being relevant for installations covered by this part also apply.
251 This part may therefore also supplement, modify or replace certain of these requirements valid
252 at the time of publication of this part.
253 The clause numbering of this part follows the pattern and corresponding references of
254 IEC 60364. The numbers following the particular number of this part are those of the
255 corresponding parts, or clauses of the other parts of the IEC 60364 series, valid at the time of
256 publication of this part, as indicated in the normative references of this document (dated
257 reference). If requirements or explanations additional to those of the other parts of the
258 IEC 60364 series are needed, the numbering of such items appears as 712.101, 712.102,
259 712.103, etc.
260 Numbering of figures and tables takes the number of this part followed by a sequenti al number.
261 For annexes, the numbering of figures and tables takes the letter of the annex, the number of
262 the part and a sequential number.
263 In the case where new or amended general parts with modified numbering were published after
264 this part was issued, the clause numbers referring to a general part in this part 712 may no
265 longer align with the latest edition of the general part. Dated references should be observed.
267 Attention is drawn to the co-existence of IEC 60364-7-712 and IEC 62548 standards. Both
268 standards have been developed in close coordination by different technical committees.
269 A list of all parts in the IEC 60364 series, published under the general title Low voltage electrical
270 installations, can be found on the IEC website.
271 The reader's attention is drawn to the fact that Annex F lists all of the “in-some-country” clauses
272 on differing practices of a less permanent nature relating to the subject of this standard.
274 The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed
275 that compliance with this document may involve the use of a patent. IEC takes no position
276 concerning the evidence, validity, and scope of this patent right.
277 The holder of this patent right has assured IEC that s/he is willing to negotiate licences under
278 reasonable and non-discriminatory terms and conditions with applicants throughout the world.

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279 In this respect, the statement of the holder of this patent right is registered with IEC. Information
280 may be obtained from the patent database available at patents.iec.ch/.
281 Attention is drawn to the possibility that some of the elements of this document may be the
282 subject of patent rights other than those in the patent database. IEC shall not be held
283 responsible for identifying any or all such patent rights.
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286 LOW VOLTAGE ELECTRICAL INSTALLATIONS –
288 Part 7-712: Requirements for special installations or locations –
289 Solar photovoltaic (PV) power supply installations
293 712 Solar photovoltaic (PV) power supply installations
294 712.1 Scope
295 This part of IEC 60364 applies to the electrical installation of PV systems.
296 The equipment of a PV system, like any other item of equipment, is dealt with only so far as its
297 selection and application in the installation is concerned. A PV installation comprises of all
298 equipment from PV modules(s) up to the connection point to other parts of the installation e.g.
299 a distribution board or the utility supply point (point of connection).
300 It may include requirements on electrical installation resulting from the installation of PV power
301 supply installations.
302 Requirements are included relating to the possible installation of energy storage sy stems (e.g.
303 batteries).
304 Requirements are also included for PV installations for island mode operation described in IEC
305 60364-8-82.
306 NOTE 1 The abbreviation “PV” is used for “Photovoltaic”. Photovoltaic installations are, hereafter, known as PV
307 installations.
308 NOTE 2 Additional requirements for PV system floating on water are under development. See Bibliography.
309 712.2 Normative references
310 The following documents are referred to in the text in such a way that some or all of their content
311 constitutes requirements of this document. For dated references, only the edition cited applies.
312 For undated references, the latest edition of the referenced document (including any
313 amendments) applies.
314 IEC 60228, Conductors of insulated cables
315 IEC 60269-6, Low-voltage fuses – Part 6: Supplementary requirements for fuse-links for the
316 protection of solar photovoltaic energy systems
317 IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test
318 for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW
319 pre-mixed flame
320 IEC 60364 (all parts), Low-voltage electrical installations
321 IEC 60479-1, Effects of current on human beings and livestock - Part 1: General aspects
322 IEC 60529, Degrees of protection provided by enclosures (IP Code)
323 IEC 60670 (all parts), Boxes and enclosures for electrical accessories for household and similar
324 fixed electrical installations

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325 IEC 60898 (all parts), Electrical accessories – Circuit-breakers for overcurrent protection for
326 household and similar installations
327 IEC 60947 (all parts), Low-voltage switchgear and controlgear
328 IEC 61140, Protection against electric shock – Common aspects for installation and equipment
329 IEC TS 61201, Use of conventional touch voltage limits – Application guide
330 IEC 61215 (all parts), Terrestrial photovoltaic (PV) modules − Design qualification and type
331 approval
332 IEC 61439 (all parts), Low-voltage switchgear and controlgear assemblies
333 IEC 61439-2, Low-voltage switchgear and controlgear assemblies – Part 2: Power switchgear
334 and controlgear assemblies
335 IEC 61557-8:2014, Electrical safety in low voltage distribution systems up to 1 000 V AC and
336 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 8:
337 Insulation monitoring devices for IT systems
338 IEC 61557-9, Electrical safety in low voltage distribution systems up to 1 000 V AC and
339 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 9:
340 Equipment for insulation fault location in IT systems
341 IEC 61643-31:2018, Low-voltage surge protective devices – Part 31: Requirements and test
342 methods for SPDs for photovoltaic installations
343 IEC 61643-32, Low-voltage surge protective devices – Part 32: Surge protective devices
344 connected to the DC side of photovoltaic installations – Selection and application principles.
345 IEC 61730 (all parts), Photovoltaic (PV) module safety qualification
346 IEC 62109 (all parts), Safety of power converters for use in photovoltaic power systems
347 IEC 62109-1:2010, Safety of power converters for use in photovoltaic power systems – Part 1:
348 General requirements
349 IEC 62109-2, Safety of power converters for use in photovoltaic power systems – Part 2:
350 Particular requirements for inverters
351 IEC 62262, Degrees of protection provided by enclosures for electrical equipment against
352 external mechanical impacts (IK code)
353 IEC 62423, Type F and type B residual current operated circuit-breakers with and without
354 integral overcurrent protection for household and similar uses
355 IEC 62446-1, Photovoltaic (PV) systems – Requirements for testing, documentation and
356 maintenance – Part 1: Grid connected systems – Documentation, commissioning tests and
357 inspection
358 IEC 62446-2, Photovoltaic (PV) systems – Requirements for testing, documentation and
359 maintenance – Part 2: Grid connected systems – Maintenance of PV systems
360 IEC 62509, Battery charge controllers for photovoltaic systems - Performance and functioning

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361 IEC 62852, Connectors for DC-application in photovoltaic systems – Safety requirements and
362 tests
363 IEC 62930, Electric cables for photovoltaic systems with a voltage rating of 1,5kV DC
364 IEC 63027, DC arc detection and interruption in photovoltaic power systems
365 IEC 63112, Photovoltaic (PV) arrays – Earth fault protection equipment – Safety and safety-
366 related functionality
367 IEC TS 63126, Guidelines for qualifying PV modules, components and materials for operation
368 at high temperatures
369 IEC TR 63225, Incompatibility of connectors for DC-application in photovoltaic systems
370 712.3 Terms and definitions
371 For the purposes of this document, the following terms and definitions apply.
372 ISO and IEC maintain terminology databases for use in standardization at the following
373 addresses:
374 • IEC Electropedia: available at https://www.electropedia.org/
375 • ISO Online browsing platform: available at https://www.iso.org/obp
376 712.3.1
377 PV cell
378 photovoltaic cell
379 solar cell
380 solar photovoltaic cell
381 most elementary device that exhibits the photovoltaic effect, i.e. the direct non-thermal
382 conversion of radiant solar energy into electrical energy
383 Note 1 to entry: The preferred term is "solar photovoltaic cell" or "photovoltaic cell", colloquially referred to as a
384 "solar cell".
385 [SOURCE: IEC TS 61836:2016, 3.1.48.1, modified — "that exhibits … electrical energy" has
386 been added]
387 712.3.2
388 PV module
389 smallest complete environmentally protected assembly of interconnected cells
390 712.3.3
391 PV string
392 circuit of one or more series-connected PV modules
393 Note 1 to entry: If only some PV modules of a PV string are equipped with a DCU the string is still considered as a
394 PV string
395 [SOURCE: IEC TS 61836:2016, modified – "or one or more" has been added]
396 712.3.4
397 PV array
398 assembly of electrically interconnected PV modules, PV strings, DCU strings or PV sub -arrays
399 up to the final PCE or DC load

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400 Note 1 to entry: For the purposes of this document a PV array is all components up to the DC input terminals of a
401 final PCE or DC load. A PV array does not include its foundation, module supporting structures, tracking apparatu s,
402 thermal control, and other such components.
403 Note 2 to entry: A PV array may consist of a single PV module, a single PV string, or several parallel -connected
404 strings, or several parallel-connected PV sub-arrays and their associated electrical components. For the purposes
405 of this document the boundary of a PV array is the output side of the PV array disconnecting device.
406 712.3.5
407 PV sub-array
408 electrical subset of a PV array formed of parallel connected PV strings or DCU strings
409 712.3.6
410 PV string cable
411 cable interconnecting the modules in a PV string, the PCE in a DCU string or connecting the
412 string to a combiner box, PCE or other DC loads
413 Note 1 to entry: Examples of PV string cable are shown in Figure 5 and Figure 6.
414 712.3.7
415 PV array cable
416 cable of a PV array that carries the total output current of the array
417 712.3.8
418 PV AC supply cable
419 cable connecting the AC terminals of the PCE to a distribution board of the electrical installation
420 712.3.9
421 PV AC supply circuit
422 circuit connecting the AC terminals of the PCE to a distribution board of the electrical installation
423 712.3.10
424 PV AC module
425 assembly of a PV module with its integrated inverter where the electrical interface terminals are
426 alternating current only and where no access is provided to the DC side
427 712.3.11
428 PV installation
429 erected equipment from PV modules(s) up to the connection point to other parts of the
430 installation e.g. a distribution board or the utility supply point; supplying electr ical energy”
431 712.3.12
432 standard test conditions
433 STC
434 standard set of reference conditions used for the testing and rating of photovoltaic cells and
435 modules
436 Note 1 to entry: The standard test conditions given in IEC 61215 for PV modules are:
437 a) PV cell temperature of 25 °C;
438 b) irradiance in the plane of the PV cell or module of 1 000 W/m2;
439 c) light spectrum corresponding to an atmospheric air mass of 1,5.
440 712.3.13
441 open-circuit voltage under standard test conditions
442 U
OC STC
443 voltage under standard test conditions across an unloaded (open) PV module, PV string, PV
444 sub-array or PV array
Internal
oSIST prHD 60364-7-712:2023
IEC CDV 60364-7-712 © IEC 2023 – 15 – 64/2628/CDV
445 712.3.14
446 open-circuit maximum voltage
447 U
OC MAX
448 maximum voltage across an unloaded (open) PV module, PV string, DCU string, PV sub -array
449 or PV array,
450 Note 1 to entry: The method for determining U is given in Annex A.
OC MAX
451 712.3.15
452 short-circuit current under standard test conditions
453 I
SC STC
454 short-circuit current of a PV module, PV string, or PV array under standard test conditions
455 712.3.16
456 short-circuit maximum current
457 ISC MAX
458 maximum short-circuit current of a PV module, PV string, DCU string, PV sub-array or PV array
459 Note 1 to entry: The method for determining I is given in Annex A.
SC MAX
460 712.3.17
461 backfeed current
462 IBF
463 current that can pass from PCE to the PV array and its wiring under normal or single fault
464 conditions
465 712.3.18
466 reverse current
467 current that can flow in the reverse direction into a PV circuit from parallel connected strings or
468 sub-arrays as the result of a fault.
469 712.3.19
470 DC side
471 PV circuit, battery circuit, DC bus circuit or DCU string circuit of a PV installation
472 712.3.20
473 AC side
474 part of a PV installation from the AC terminals of the inverter to the point of connection of the
475 PV supply cable to the electrical installation
476 712.3.21
477 maximum power point tracking
478 MPPT
479 control strategy whereby operation of the PV modules is always at or near the point on a PV
480 device's current-voltage characteristic where the product of electric current and voltage yields
481 the maximum electrical power under specified operating conditions
482 Note 1 to entry: This note applies to the French language only.
483 712.3.22
484 I
MOD_MAX_OCPR
485 PV module maximum overcurrent protection rating
486 Note 1 to entry: See IEC 61730-2.
487 712.3.23
488 blocking diode
489 diode connected in series with module(s), strings and sub-array(s) to block reverse or backfeed
490 currents
Internal
oSIST prHD 60364-7-712:2023
64/2628/CDV – 16 – IEC CDV 60364-7-712 © IEC 2023
491 712.3.24
492 bypass diode
493 diode connected across one or more cells in the forward current direction
494 Note 1 to entry: The purpose is to allow the module current to bypass shaded or broken cells to preven
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