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BSI PD IEC/TS 62257-9-4:2016 – TC:2020 Edition

$186.33

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

Published By Publication Date Number of Pages
BSI 2020 55
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IEC TS 62257-9-4:2016(E) specifies the general requirements for the design and the implementation of a user’s installation. It applies to single phase user’s electrical installations with maximum power of 500 VA, in decentralized rural electrification systems. It is applicable to installations supplied by an AC microgrid and to installations encompassing their own single-unit AC micropower plant or DC micropower plant. 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
31 CONTENTS
33 FOREWORD
35 INTRODUCTION
36 1 Scope
2 Normative reference
37 3 Terms and definitions
38 4 General considerations
4.1 General
4.2 Installation limits
4.3 User interface
5 Protection against electric shock
5.1 Requirements for d.c. parts of installation
5.2 Requirements for a.c. parts of installation
5.2.1 General
5.2.2 Neutral earthing system
Figures
Figure 1 – Installation limits
39 Figure 2 – Protection of persons in an installation supplied from a microgrid according to a TN-C-S system
40 6 Protection against overcurrent
7 Protection against effect of lightning
7.1 Installation supplied from a microgrid
7.2 Standalone installation
Figure 3 – Protection of persons in a combined d.c. and a.c. system
Tables
Table 1 – Maximum design current of circuits depending on voltages
41 8 Selection and erection of electrical equipment
8.1 Wiring system
8.1.1 General
8.1.2 Voltage drops
8.1.3 Cross-sectional area of conductors
Table 2 – Maximum acceptable voltage drop values in installations
42 8.1.4 Connections
Table 3 – Cross-sectional area for copper conductors in fixed installations
43 8.1.5 Installation method
Table 4 – Selection of wiring systems
Table 5 – Installation of wiring systems
44 8.1.6 Selection and erection of wiring systems in relation to external influences
46 8.1.7 Specific rules to wiring systems buried in earth
47 8.1.8 Circuits identification
8.2 Isolation and switching
8.2.1 Overcurrent protective devices
8.2.2 Residual current devices
8.3 Surge protective devices
8.4 Earthing arrangement, protective conductors and protective bonding
8.5 User interface
Table 6 – Fuses/circuit breakers rating and selection for overcurrent protection
48 9 Verification
9.1 Pre-commissioning checks
9.1.1 General information
9.1.2 Verification by inspection
49 9.1.3 Verification by tests
10 Operation and maintenance
50 Annex A (informative) Maximum possible length of circuits with different cables and conductors to handle maximum voltage drops (ambient temperature 30 °C)
51 Figure A.1 – Maximum possible length of circuit as a function of current for a voltage drop of 3 % in a.c. system in a cable HO5VVF
52 Figure A.2 – Maximum possible length of circuit as a function of current for a voltage drop of 15 % in d.c. system in a cable 1000RO2V
BSI PD IEC/TS 62257-9-4:2016 - TC
$186.33