ʻO ke kumu o ka transformer hoʻokaʻawale ʻekolu-phase e hoʻohana pono i ke kumu o ka induction electromagnetic. He palekana ka hoʻohana ʻana i kahi transformer hoʻokaʻawale ʻekolu-phase, i hoʻohana mau ʻia e like me ka lako mana mālama. ʻO ka transformer kaʻawale ka mea maʻamau 1: 1 transformer, akā he ʻokoʻa nā kikoʻī. Hoʻohana ʻia nā mea hoʻololi hoʻokaʻawale ʻekolu no ka hoʻololi ʻana i ka uila, kukui, ka mana a me ka hoʻoponopono ʻana i ka mana, hoʻohana nui ʻia i nā ʻoihana ʻoihana a me nā ʻoihana mining, nā mea kanu mana, nā mokulele, nā hale kiʻekiʻe, nā subways a me nā wahi ʻē aʻe me nā koi palekana ahi kiʻekiʻe.