SIST EN IEC 62933-4-3:2026

SLOVENSKI STANDARD
oSIST prEN IEC 62933-4-3:2024
01-december-2024
Električne naprave za shranjevanje energije (EES) - 4-3. del: Zaščitne zahteve za
BESS glede na okoljske razmere
Electrical energy storage (EES) systems - Part 4-3: The protection requirements of
BESS according to the environmental conditions
Ta slovenski standard je istoveten z: prEN IEC 62933-4-3:2024
ICS:
27.010 Prenos energije in toplote na Energy and heat transfer
splošno engineering in general
oSIST prEN IEC 62933-4-3:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 62933-4-3:2024
oSIST prEN IEC 62933-4-3:2024
120/385/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62933-4-3 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-10-25 2025-01-17
SUPERSEDES DOCUMENTS:
120/370/CD, 120/375A/CC
IEC TC 120 : ELECTRICAL ENERGY STORAGE (EES) SYSTEMS
SECRETARIAT: SECRETARY:
Japan Mr Masatake SAKUMA
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 21,SC 21A,TC 77,CISPR
ASPECTS CONCERNED:
Environment
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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TITLE:
Electrical energy storage(EES) systems - Part 4-3: The protection requirements of BESS according to
the environmental conditions
PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
This CDV has been reflected the observations of 120/375A/CC. It has been also reflected the results of the
votes of 120/380/Q.
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
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2 CONTENTS
4 FOREWORD . 3
5 INTRODUCTION . 5
6 1 Scope . 6
7 2 Normative references . 6
8 3 Terms and definitions . 6
9 4 General . 8
10 5 Environmental Factors to BESS . 9
11 5.1 Analysis of the factors to affect BESS . 9
12 5.2 The types and the origin of the environmental factors . 10
13 6 The risk analysis of each environmental factor and the relevant measures . 11
14 6.1 Risks on BESS by the water and the relevant measures . 11
15 6.2 Risks on BESS by the Air and the relevant measures . 12
16 6.3 Risks on BESS by the Flora and the relevant measures . 13
17 6.4 Risks on BESS by the Fauna and the relevant measures . 14
18 6.5 Risks on BESS by the Lightning and the relevant measures . 15
19 6.6 Risks on BESS by the Seismic and the relevant measures . 15
20 6.7 Risks on BESS by the other disasters and the relevant measures . 15
21 Annex A (informative) Report format of risk analysis and the measures . 17
22 A.1 The reporting the impacts of environmental factors and the measures . 17
23 Bibliography . 18
25 Table 1 – Excerpt of environmental factors on BESS . 10
26 Table 2 – Risks by the water and Measures . 11
27 Table 3 – Risks by the air and Measures . 12
28 Table 4 – Risks by Flora and Measures . 13
29 Table 5 – Risks by Fauna including human and Measures . 14
30 Table 6 – Risks by the Lightning and Measures . 15
31 Table 7 – Risks by Seismic and Measures . 15
32 Table 8 – Risks by Other disasters and Measures . 16
33 Table A.1 – Excerpt of a report describing impacts on BESS and the related measures . 17
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36 INTERNATIONAL ELECTROTECHNICAL COMMISSION
37 ____________
39 ELECTRICAL ENERGY STORAGE (EES) SYSTEMS
41 Part 4-3: The protection requirements of BESS according to the environmental
42 conditions
45 FOREWORD
46 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
47 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
48 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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54 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
55 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
56 consensus of opinion on the relevant subjects since each technical committee has representation from all
57 interested IEC National Committees.
58 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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62 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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72 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
73 Publications.
74 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
75 indispensable for the correct application of this publication.
76 9) [IEC/IEC and ISO] [draws/draw] attention to the possibility that the implementation of this document may involve
77 the use of (a) patent(s). [IEC/IEC and ISO] [takes/take] no position concerning the evidence, validity or
78 applicability of any claimed patent rights in respect thereof. As of the date of publication of this document,
79 [IEC/IEC and ISO] [had/had not] received notice of (a) patent(s), which may be required to implement this
80 document. However, implementers are cautioned that this may not represent the latest information, which may
81 be obtained from the patent database available at https://patents.iec.ch [and/or] www.iso.org/patents. [IEC/IEC
82 and ISO] shall not be held responsible for identifying any or all such patent rights.
83 IEC 62933-4-3 has been prepared by subcommittee WG4: of IEC technical committee TC120:
84 Electrical Energy Storage (EES) systems. It is an International Standard.
85 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
87 Full information on the voting for its approval can be found in the report on voting indicated in
88 the above table.
oSIST prEN IEC 62933-4-3:2024
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89 The language used for the development of this International Standard is English.
90 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
91 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement available
92 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
93 described in greater detail at www.iec.ch/publications.
94 The committee has decided that the contents of this document will remain unchanged until the
95 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
96 specific document. At this date, the document will be
97 • reconfirmed,
98 • withdrawn,
99 • replaced by a revised edition, or
100 • amended.
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102 INTRODUCTION
103 According to the reports over the world, BESS has been influenced by the environmental
104 conditions and the climatic conditions of the areas where it is installed. Particularly the BESS
105 can be affected by temperature, humidity, and vibration and natural disasters. In order to
106 minimize the impacts, this document is expected to be of great help in stable installation and
107 operation by presenting the causes, risk factors and the appropriate measures for each
108 environmental condition when installing the BESS

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109 ELECTRICAL ENERGY STORAGE (EES) SYSTEMS
111 Part 4-3: The protection requirements of BESS according to the
112 environmental conditions
116 1 Scope
117 This part of IEC 62933 applies to the effects of the environmental conditions on Battery Energy
118 Storage Systems (BESS). This document addresses these effects and identifies causes, chain
119 of events and final effects on the BESS. Based on those effects, preventative or mitigating
120 measures are described. Typical environmental effects on the BESS include, but are not limited
121 to, the effects of lightning, seismic activities, water, air, flora, fauna, and humans. The described
122 measures focus as a guideline on the entire BESS including all power and communication
123 connections and its Point of Connections (POCs).
124 The scope of this document is limited to BESS specific requirements and operating conditions.
125 Specific design or safety requirements of individual BESS subsystems are excluded from this
126 document
127 2 Normative references
128 The following documents are referred to in the text in such a way that some or all their content
129 constitutes the requirements of this document. For dated references, only the edition cited
130 applies. For undated references, the latest edition of the referenced document (including any
131 amendments) applies.
132 IEC 62933-1, Electrical energy storage (EES) systems – Part 1: Vocabulary
133 IEC TS 62933-4-1, Electrical energy storage (EES) systems - Part 4-1: Guidance on
134 environmental issues – General specification
135 IEC 60050-631, International Electrotechnical Vocabulary (IEV): Part 631. Electrical energy
136 storage systems
137 ISO 14050:2009, Environmental management — Vocabulary: 3.1
138 ISO 14001:2015, Environmental management systems — Requirements with guidance for use,
139 3.2.4
140 3 Terms and definitions
141 For the purposes of this document, the following terms and definitions apply.
142 ISO and IEC maintain terminology databases for use in standardization at the following
143 addresses:
144 • IEC Electropedia: available at https://www.electropedia.org/
145 • ISO Online browsing platform: available at https://www.iso.org/obp
146 For the purposes of this document, the terms and definitions given in IEC 62933-1and the
147 following apply.
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148 ISO and IEC maintain terminology databases for use in standardization at the following
149 addresses:
150 • IEC Electropedia: available at https://www.electropedia.org/
151 • ISO Online browsing platform: available at https://www.iso.org/obp
152 3.1
153 Environmental factor
154 Physical, social and attitudinal environment in which people live and conduct their lives
155 [SOURCE: ISO 9999:2022(en), 3.7]
156 3.2
157 Risk analysis
158 Systematic use of available information to identify hazards and to estimate the risk
159 [SOURCE: ISO/IEC Guide 51:1999, 3.10]
160 3.3
161 Seismic action
162 Action caused by earthquake ground motions
163 [SOURCE: ISO 2394:2015, 2.3.15]
164 3.4
165 Human factor
166 Environmental, organisational, and job factors which influence behaviour of work in a way that
167 can affect health and safety
168 [SOURCE: ISO 13702:2015(en), 3.1.28]
169 3.5
170 Arcing
171 Luminous discharge of electricity across an insulating medium, usually accompanied by the
172 partial volatilization of the electrodes
173 Note 1 to entry: A complete sinusoidal current half-cycle is not considered to be an arcing half-
174 cycle.
175 [SOURCE: IEC 62606:2013, 3.1]
176 3.6
177 Internal resistance
178 Opposition to the flow of current within a cell (3.4) or a battery (3.3), that is, sum of electronic
179 resistance and ionic resistance with the contribution to total effective resistance including
180 inductive/capacitive properties
181 [SOURCE: ISO 17546:2024(en), 3.17]
182 3.7
183 BMS (Battery Management System)
184 Set of protection functions associated with a battery to prevent overcharge, overcurrent, over-
185 temperature, under-temperature and, if applicable, overdischarge and which monitors and/or
186 manages its state, calculates secondary data, reports that data and/or controls its environment
187 to influence the battery’s safety, performance and/or service life’
188 [SOURCE: ISO 63056-2020(en), 3.12]

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189 3.8
190 Water leakage
191 Water drop or flow that spills out from the closed pipe and container
192 [SOURCE: ISO 2710-2:2019(en), 3.4.37]
193 3.9
194 EMC (Electromagnetic Compatibility)
195 Ability of equipment or a system to function satisfactorily in its electromagnetic environment
196 without introducing intolerable electromagnetic disturbances to anything in that environment
197 IEV ref 161-01-07
198 3.10
199 High voltage
200 Voltage having a value above a conventionally adopted limit
201 Note – An example is the set of upper voltage values used in bulk power systems
202 [SOURCE: 601-01-27 MOD]
203 IEV ref 151-15-05
204 3.11
205 Salinity
206 Quantification of any dissolved salts in water, expressed as either a percentage or a
207 concentration
208 [SOURCE: ISO/TR 12748:2015(en), 2.50]
209 3.12
210 Stem
211 Portion of a standing tree above ground, excluding branches
212 [SOURCE: ISO 8965:2022(en), 3.4.1]
213 3.13
214 Mould
215 Woolly or powdery fungal growth that can form on the surface of wood (3.1) in damp conditions
216 [SOURCE: ISO 24294:2021(en), 13.17]
217 3.14
218 POC (point of connection)
219 reference point on the electric power system (IEV 601-01-01) where an EES system is
220 connected
221 [SOURCE: IEC 62933-1:2024, 4.1.3]
222 4 General
223 The impact on Battery Energy Storage Systems (BESS) from environmental factors depends
224 on the location of the BESS installation. This standard provides guidelines on the environmental
225 factors and requirements for identifying potential impacts on BESS installed in described
226 environmental areas.
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227 When a BESS operator or system integrator installs the system in a specified area, the
228 environmental factors are analysed and documented in accordance with Clause 5 and Clause
229 6 of this standard before the BESS is installed at a designated area.
230 The environmental factors referenced in this document adhere to IEC TS 62933-4-1 Ed1.0.
231 Clause 6.3 of IEC TS 62933-4-1 identifies factors such as lightning, seismic risk, flooding, water,
232 rain, temperature, pressure, wind, ice and snow, life form invasion, vibration/resonance, dust,
233 smoke, fire, external fire, external electromagnetic source, humidity, salt mist/salt water/erosive
234 chemical, corrosion, solar irradiation, sediment build up. Clause 5 in this document categorizes
235 these factors based on IEC TS 62933-4-1 and classifies them with detailed risk factors.
236 The following clauses describe the risk analysis of each environmental factor and the relevant
237 measures. The relevant measures are example and not limited to the listed ones.
238 5 Environmental Factors to BESS
239 5.1 Analysis of the factors to affect BESS
241 BESS is installed and operated around the world with various purposes. When it is installed in
242 many different areas, the factors which are referred at IEC TS 62933-4-1, can make an effect
243 on the BESS. In this document, the typical environmental effects on the BESS include, but are
244 not limited to, the effects of lightning, seismic activities, water, air, flora, fauna, and humans. In
245 order to operate the BESS stably, it is important to address the problems that can arise due to
246 these factors and make the appropriate measures to solve the problems.
248 In this document, it describes what types the environmental factors are and the ways how they
249 adversely affect the BESS.
250 The assumed BESS architecture is shown in the Figure 1 that is used for the risk analysis in
251 clause 6.
253 Figure 1 – The assumed BESS architecture
254 The operator or system integrator of the BESS should refer to the environmental factors
255 described in this document. The risk analysis and related measures shall be performed prior to
256 the installation.
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257 5.2 The types and the origin of the environmental factors
258 According to Clause 5.1, the environmental factors are listed as lightning, seismic activities,
259 water, air, flora, fauna, and humans. The types of each factor include, but not limited to each
260 different form. The other types of each factor can be additionally analysed by the BESS
261 integrator or operator. The main factor are shown in the Table 1.
262 Table 1 – Excerpt of environmental factors on BESS
Type of factors Risk factors
Water Water leak, Flooding, Moisture & Condensation, tsunami, Heavy snow
Air Dust, Chemical gas, Salinity, Strong storm (wind), Ambient temperature (heat wave
and cold wave), Altitude (pressure)
Flora Roots, Stems, Pollen, Moss and Mould, Weeds
Fauna including human Invading, colliding, laying, gnawing
Lightning Natural environment, High voltage
Vibration Transportation, surrounding location of the factory
Oth
...