Ho latela IEC le litekanyetso tsa naha tse amehang, tlhahlobo ea karo-karolelano ea li-transformer ke ntho e lokelang ho etsoa nakong ea tlhahiso, phepelo ea basebelisi le tlhahlobo ea ntlafatso ea li-transformer tsa motlakase.Sena se ka laola ka katleho boleng ba lihlahisoa tsa transformer nakong ea ho pepa le ho sebelisoa, le ho thibela lipotoloho tse khutšoanyane, potoloho e bulehileng, khokahanyo e fosahetseng pakeng tsa ho fetoha ha transformer, le ho hlōleha ha ka hare kapa ho hloleha ho kopana ha sesebelisoa sa regulator.
Ka lebaka lena, tlhahlobo ea karo-karolelano ea GDB-II e ntlafalitsoeng le e hlahisoang ke k'hamphani ea rona e etsa hore ts'ebetso e be bonolo, e phethehe, data e tsitsitseng le e tšepahalang, 'me e ntlafatsa haholo lebelo la teko ho latela litlhoko tsa mosebelisi tsa ts'ebeliso ea sebaka sa marang-rang motheong oa mantlha.E khahlametsa litlhoko tsa liteko tse fapaneng tse kholo, tse mahareng le tse nyane tsa li-transformer tsa oli.