BS PD IEC/TS 62257-9-2:2016, which is a technical specification, specifies the general requirementsfor the design and the implementation of microgrids used in decentralized rural electrificationto ensure the safety of persons and property and their satisfactory operation according to thescheduled use.This part of IEC 62257 applies to microgrids for decentralized rural electrification purposes.The microgrids covered by this part of IEC 62257 are low voltage a.c., three-phase or singlephase,with rated capacity less than or equal to 100 kVA. They are powered by a singlemicropower plant and do not include voltage transformation. The rated capacity is at theelectrical output of the micropower plant, that is, the upstream terminals of the main switchbetween the micropower plant and the microgrid.The voltage levels covered under this specification are voltages of the 240 V 1-Ø/415 V 3-Ø,the 230 V 1-Ø/400 V 3-Ø, the 220 V 1-Ø/380 V 3-Ø, and the 120 V 1-Ø/208 V 3-Ø systems at60 Hz or 50 Hz; or obeyed by local code.This part of IEC 62257 specifies microgrids made of overhead lines because of technical andeconomical reasons in the context of decentralized rural electrification. In particular cases,underground cables can be used.The requirements cover microgrids with radial architecture.Cross References:IEC 61439IEC 62257IEC/TS 62257-5