Iswitshi ezenzekelayo yamandla amabini isetyenziselwa ukutshintsha phakathi kwemithombo yombane emibini. Yahlulwe yaba yi-common power supply kunye ne-standby power supply. Xa i-common power supply icinyiwe, kusetyenziswa i-standby power supply. Xa i-common power supply ibizwa, i-common power supply iyabuyiselwa), ukuba awudingi ukutshintshela ngokuzenzekelayo kwiimeko ezikhethekileyo, ungayiseta kwakhona kwi-manual switching (olu hlobo lwe-manual / automatic dual-use, adjustment).