Lus piav qhia luv luv:

Kev tiv thaiv hluav taws xob relay siv lub tshuab ua haujlwm siab thiab qis zog ua nws cov tub ntxhais.

Thaum cov kab hluav taws xob muaj tshaj-voltage, under-voltage, lossis theem tsis ua haujlwm,

theem rov qab, lub relay yuav txiav tawm Circuit Court sai thiab nyab xeeb kom tsis txhob muaj xwm txheej

tshwm sim los ntawm qhov txawv txav voltage raug xa mus rau lub tshuab hluav taws xob. Thaum voltage

rov qab mus rau tus nqi ib txwm muaj, lub relay yuav tig rau hauv Circuit Court kom paub meej

kev ua 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.