1) Zama ukukhetha ukulahlekelwa okuphansi, ukusebenza kahle kakhulu kanye ne-transformer yokonga amandla 2) Ngokwesimo somthwalo, khetha i-transformer enomthamo ozwakalayo 3) Isilinganiso somthwalo we-transformer kufanele sibe sikhulu kune-70% 4) Lapho isici somthwalo esimaphakathi ngokuvamile singaphansi kuka-30%, isiguquli esinamandla amancane kufanele sishintshwe ngendlela efanele 5) Thuthukisa isici samandla okulayisha ukuze uthuthukise ikhono le-transformer lokudlulisa amandla asebenzayo 6) Lungiselela ngokunengqondo umthwalo ukuze unciphise inani lama-transformer. ekusebenzeni.