Bokosi logawa la HDB-M mndandanda wa 3 pole limagwiritsidwa ntchito pa bolodi logawa loteteza magetsi, chosinthira chachikulu ndi 100A-2P100A-3P cholumikizira magetsi, chosinthira cha nthambi ndi chosokoneza ma circuit. Bolodi logawa magetsi la SME-100A lili ndi ntchito yochedwetsa komanso yoteteza kupitirira muyeso nthawi yomweyo.