LO20-26D1212-04-C is a State Grid TTU dedicated switching power supply. The AC-DC converter is a three-phase four-wire power dedicated switching power supply designed for intelligent distribution terminal, intelligent power distribution detection terminal, etc. According to the latest national grid company enterprise standard and operates over a very wide input voltage range: 165-480VAC or 230-680VDC. It meets the three-phase three wire or four-wire rated voltage. So it is a design solution for electric-meter application sourced from a three-phase AC supply with the requirement of high isolation voltage and rigorous EMC, for extremely harsh EMC environment, we recommend using the application circuit show in Design Reference of this datasheet.
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* For reference only. The detailed info please refer to the datasheet.