Tus qauv ua haujlwm ntawm cov khoom siv dej tsis muaj zog yog suav nrog cov kauj ruam hauv qab no:
Voltage hloov dua siab tshiab: cov khoom siv dej hluav taws xob muab hloov kho cov khoom siv voltage rau cov hluav taws xob uas yuav los ntawm kev hloov pauv sib txawv.
Cov kev cai tam sim no: lub rectifier yog siv los hloov ac lub zog rau hauv DC lub zog, thiab cov kev tsim hluav taws xob kom ua kom tsis txhob muaj ntau dhau thiab luv dua Circuit Court.
Ntau cov kev tiv thaiv kev tiv thaiv: Cov khoom siv dej tsis muaj zog feem ntau muaj cov khoom siv hluav taws xob tsis muaj zog los tiv thaiv kev nyab xeeb ntawm cov khoom siv thiab cov neeg siv.
