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BSI PD IEC/TS 62257-9-1:2016 – TC:2020 Edition

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Tracked Changes. Recommendations for renewable energy and hybrid systems for rural electrification – Integrated systems. Micropower systems

Published By Publication Date Number of Pages
BSI 2020 136
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IEC TS 62257-9-1:2016(E) provides general requirements for the design, erection and operation of micropower plants and general requirements to ensure the safety of persons and property. The micropower plants covered by this specification are low-voltage a.c., three-phase or single-phase, with rated capacity less than, or equal to, 100 kVA. The main technical changes with regard to the previous edition are as follows: changing the voltage range covered by the technical specification to AC nominal voltage below 1 000 V and DC nominal voltage below 1 500 V. This publication is to be read in conjunction with /2.

PDF Catalog

PDF Pages PDF Title
76 CONTENTS
79 FOREWORD
81 INTRODUCTION
82 1 Scope
83 2 Normative references
3 Terms and definitions
85 4 General
4.1 Boundary of a micropower plant
86 4.2 Composition of a micropower plant
4.3 General functional layout of a micropower plant
Figures
Figure 1 – Micropower system limits
87 5 Design
5.1 Design criteria
Figure 2 – Example of functional layout for a micropower plant supplying a.c. energy
88 5.2 Power generation mix
5.2.1 General
89 5.2.2 Internal combustion generator sets
5.3 Electrical design
5.3.1 System voltage selection
90 5.3.2 Interconnection of generators
5.4 Mechanical and civil works
5.4.1 Civil works
5.4.2 Technical room
Figure 3 – Interconnection configuration with d.c. bus and a.c. bus
Figure 4 – Interconnection configuration with a.c. bus only
91 5.4.3 Battery room
5.4.4 Specific requirements
6 Safety issues
6.1 Electrical issues
6.1.1 General
6.1.2 Specific requirements
92 Figure 5 – Example of protection against effects of lightning and over-voltage for generators with two live conductors output (d.c. or a.c.) TNS P+N
93 Figure 6 – Example of protection against effects of lightning over-voltage for three phase generators with four live a.c. conductors (TNS P+N scheme) – Generator side
Figure 7 – Example of a simplified lightning protection includinga crow’s foot earth termination
94 Figure 8 – Protection of a photovoltaic array
Tables
Table 1 – Minimum dimensions for lightning protection wires
95 6.2 Mechanical issues
6.3 Thermal and fire issues
6.4 Noise issues
Figure 9 – Wiring arrangement for equipotential link
96 6.5 Access security
7 Erection of equipment
7.1 Siting
7.1.1 Photovoltaic array
7.1.2 Wind turbine
7.1.3 Micro-hydro turbine
97 7.1.4 Generator set
7.1.5 Technical room
7.1.6 Battery bank (battery enclosure)
98 7.2 Equipment installation
7.2.1 Mechanical
7.2.2 Electrical
99 Table 2 – Cross-section of 230 V a.c. power cables
100 Table 3 – Fuse ratings for protection from short-circuiting in 230 V/400 V a.c. circuits
Table 4 – Fuse ratings for protection from short-circuiting in 120 V/208 V a.c. circuits
Table 5 – Circuit-breaker ratings for protection from short-circuiting
101 8 Acceptance process
8.1 General
8.2 Phase 1: Preparation
8.3 Phase 2: Documentation
8.4 Phase 3: Commissioning
8.4.1 Step 1: Evaluation of the conformity of the installed system with the accepted design
8.4.2 Step 2: Evaluation of qualification of the installation
8.4.3 Step 3: Preliminary tests
102 8.4.4 Step 4: Performance testing
103 8.5 Phase 4: Agreement
8.6 Commissioning records
9 Operation, maintenance and replacement
10 Marking and documentation
10.1 Marking
10.1.1 Information for emergency services
10.1.2 Information for maintenance
104 10.1.3 Information for batteries
10.1.4 Signs
10.2 Documentation
106 Annexes
Annex A (informative) Selectivity of protection
107 Figure A.1 – Example of the selectivity of protection
108 Annex B (informative) Risk assessment of lightning stroke
B.1 General
B.2 Risk assessment simplified methodology
B.3 Risk assessment multi-criteria methodology
Table B.1 – Stake index values
109 Table B.2 – Construction index values
Table B.3 – Height index values
Table B.4 – Situation index values
Table B.5 – Lightning prevalence index values
110 Table B.6 – Assessment of risk and need for protection
111 Annex C (normative) Voltage domains
Table C.1 – Voltage domains
112 Annex D (informative)Battery room
D.1 Administrative formalities
D.2 Battery siting
D.3 Characteristics of the battery storage site: specific battery room or locker
113 D.4 Electrical equipment
114 D.5 Safety instructions
D.6 Battery enclosure examples (informative)
115 Figure D.1 – Two examples of a battery installed in a dedicated equipment room showing clearances from equipment
116 Figure D.2 – Example of a battery enclosure within a room where the battery enclosure is vented to outside the building
117 Figure D.3 – Example of a battery enclosure with equipment enclosure immediately adjacent
118 Figure D.4 – Example of a battery enclosure with the intake and outlet vents on the same wall
119 Annex E (informative) Energy fraction calculations
120 Annex F (informative) Noise control
F.1 General
F.2 Assessment of noise annoyance
F.3 Principles of noise attenuation
121 F.4 Noise reduction methods for specific items of equipment
F.4.1 Generator sets
F.4.2 Wind turbines
F.4.3 Inverters and other electronic equipment
122 Annex G (informative) Commissioning record sheet (examples)
133 Bibliography
BSI PD IEC/TS 62257-9-1:2016 - TC
$258.95