Thaum lub cev muaj zog nyob hauv lub xeev ua haujlwm tsis zoo (xws li hluav taws xob, tshuab thiab ib puag ncig), lub neej ntawm lub cev muaj zog yuav luv luv.Cov laj thawj rau qhov tsis ua haujlwm ntawm cov kiv cua kauj yog: theem poob, luv luv Circuit Court, coil grounding, overload, rotor xauv, voltage imbalance, ...
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