Txhawm rau ua tiav kev cob qhia thev naus laus zis rau cov neeg ua haujlwm substation ua haujlwm, raws li cov neeg ua haujlwm substation ua haujlwm, ua ntej ntawm tag nrho cov yuav tsum paub txog cov kev paub txog hluav taws xob feem ntau, lub hauv paus ntsiab lus ntawm Circuit Court, qhov no yog qhov tsim nyog heev. Tsuas yog tom qab ntawd peb tuaj yeem paub txhua yam khoom siv hauv substation thiab kev sib txuas hluav taws xob, los ntawm cov khoom siv thawj zaug mus rau cov khoom siv thib ob, los ntawm kev tshuaj xyuas mus rau kev ua haujlwm thiab kev saib xyuas, peb cov neeg ua haujlwm tuaj yeem paub qhov twg muaj hluav taws xob. Qhov txaus ntshai nyob qhov twg, qhov voltage yog dab tsi, thiab dab tsi yog qhov txaus ntshai tom qab kov.