Lus piav qhia luv luv:

Kev tiv thaiv hluav taws xob relay siv lub tshuab ua haujlwm siab thiab lub zog qis

raws li nws lub hauv paus. Thaum cov kab hluav taws xob muaj tshaj-voltage, under-voltage

, los yog theem tsis ua hauj lwm, theem rov qab, lub relay yuav txiav tawm Circuit Court sai

thiab muaj kev nyab xeeb kom tsis txhob muaj xwm txheej tshwm sim los ntawm qhov txawv txav voltage raug xa mus rau

cov khoom siv davhlau ya nyob twg. Thaum qhov hluav taws xob rov qab mus rau qhov qub,

lub relay yuav tig rau hauv Circuit Court kom paub meej tias cov haujlwm ib txwm muaj

ntawm cov khoom siv hluav taws xob hauv lub davhlau ya nyob twg nyob rau hauv cov xwm txheej tsis muaj neeg saib xyuas