Flashover effect, qhov ua paug ntawm cov pa roj los sis cov kua nruab deg ua ke nrog cov dej ntws tawm hauv qhov hluav taws xob hauv kev kub siab. Qhov ua hluav taws xob uas nws raug tshem tawm yog hu ua flashover voltage. Tom qab flashover tshwm sim, qhov voltage hla lub electrodes sai dauv xoom lossis ze rau xoom. Tsaus tawg lossis hauv cov kauj vuam hauv cov kwj deg flashover ua rau cov laus ntxig ntawm cov dej ntub ua kom ua rau hluav taws xob thiab ua kom raug hluav taws xob npoo. Qhov nruab nrab ntawm ob lub electrodes tam sim ua ntej lub flashover tshwm sim yog hu ua flashover voltage. Qhov paug ntawm qhov chaw ntawm lub tshuab insulator yog hu ua flashover, thaum lub qhov tso tawm sab hauv ntawm cov insulator yog hu ua kev rhuav tshem.
Qhov flashover voltage yog ib txwm qis dua (feem ntau sib npaug rau) qhov hluav taws xob paim hluav taws xob ntawm qhov roj qhov sib txawv nrog cov qauv electrode tib yam thiab qhov sib nrug tib yam vim muaj kev cuam tshuam ntawm qhov chaw mob thiab qhov zoo ntawm cov khoom hluav taws xob.