Lub tshuab nqus tsev ntawm lub tshuab tua hluav taws xob arc yuav tsum tau kuaj xyuas tsis tu ncua thaum lub sijhawm ua haujlwm, txoj kev yog: qhib lub Hloov, siv lub zog zaus voltage ntawm 42kV rau nws qhov qhib tawg, yog tias nws tsis tu ncua
flash-over phenomena tsos, lub arc-extinguish chamber yuav tsum tau hloov los ntawm ib qho tshiab.