prHD 60364-7-712:2023

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)

Nizkonapetostne električne inštalacije - 7-712. del: Zahteve za posebne inštalacije ali lokacije - Sončna fotonapetostna (PV) napajalna omrežja

General Information

• Status: Not Published
• Publication Date: 27-Jan-2025
• ICS: 27.160 - Solar energy engineering
• ICS: 29.020 - Electrical engineering in general
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: IEC/TC 64 - IEC_TC_64
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 29-Sep-2023
• Completion Date: 29-Sep-2023
• Ref Project: oSIST prHD 60364-7-712:2023 - Low voltage electrical installations - Part 7-712: Requirements for special installations or locations - Solar photovoltaic (PV) power supply systems

Standards Content (Sample)

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
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 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.
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.

64/2628/CDV – 2 – IEC CDV 60364-7-712 © IEC 2023
NOTE FROM TC/SC OFFICERS:
Internal
IEC CDV 60364-7-712 © IEC 2023 – 3 – 64/2628/CDV
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
Internal
64/2628/CDV – 4 – IEC CDV 60364-7-712 © IEC 2023
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

Internal
IEC CDV 60364-7-712 © IEC 2023 – 5 – 64/2628/CDV
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.
...