1. Cov khoom hnyav yuav tsum muaj peev xwm txav mus rau hauv qhov nce, nqis, sab laug, sab xis, pem hauv ntej thiab nraub qaum, thiab tuaj yeem txav mus ib txhij nyob rau hauv peb qhov kev taw qhia. Tsuas yog kev txav mus los, cov terminals ntawm lwm tsib txoj kev qhia yuav tsum tau nruab nrog kev tiv thaiv davhlau ya nyob twg.
2. Yuav tsum muaj cov khoom siv braking txhim khu kev qha, kom cov khoom hnyav yuav tsis poob vim nws qhov hnyav txawm tias muaj hluav taws xob tsis zoo.
3. Yuav tsum muaj kev tswj hwm kev ceev loj. Thaum pib txav los ntawm lub xeev nyob ruaj khov, nws yuav tsum maj mam nrawm ntawm qhov qis tshaj plaws, thiab qhov nrawm yuav tsum tsis txhob loj dhau.
4. Txhawm rau tiv thaiv cov kev phom sij uas yuav tshwm sim thaum lub sij hawm overloading los yog overspeeding, yuav tsum tau siv lub sij hawm luv luv tiv thaiv overload. Feem ntau, ib qho overcurrent relay yog siv los tiv thaiv overload ntawm Circuit Court.
5. Yuav tsum muaj kev tiv thaiv kev poob siab.
6. Yuav tsum muaj kev ntsuas kev nyab xeeb.
