IEC TS 62257-9-3:2016(E) specifies the general requirements for the design and the implementation of the interface equipment within the user’s installation which connects to a microgrid or the generating part of a standalone system. It applies to simplified user’s interfaces (distribution board) in electrical installations with maximum power of 500 VA in decentralized rural electrification systems. 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.<\/p>\n
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| 21<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 1 Scope 2 Normative reference Figure 1 \u2013 General configuration of an electrification system <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 4 Electrical characteristics 4.1 Equipment <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 4.2 System voltages 5 Functional description Figure 2 \u2013 Interface for user installations supplied from an a.c. or a d.c. source Table 1 \u2013 Functions ensured by various types of user interfaces <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 6 Design and erection 6.1 System earthing 6.2 Implementation of interface functions 6.2.1 Function A: connection to electricity sources 6.2.2 Function B: isolation 6.2.3 Function C: protection against direct and indirect contact Figure 3 \u2013 Interface for user installations supplied locally from a.c. or d.c. sources (not from a microgrid) <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 6.2.4 Function D: protection against overcurrents 6.2.5 Function E: contract management 6.2.6 Function F: earthing 6.2.7 Function G: distribution of circuits 6.3 Insulation requirements 6.4 Selection of electrical equipment 6.5 Housing 6.6 Protection against fraudulent use <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 7 Information to be given and marking 8 Verification and acceptance 8.1 General 8.2 Verification by inspection <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 8.3 Commissioning tests <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Recommendations for renewable energy and hybrid systems for rural electrification – Integrated systems. User interface<\/b><\/p>\n |