Kab insulators yog sawv cev raws li cov hloov hluav taws xob nyob rau hauv kev tshawb fawb xob laim. Txhawm rau ua raws li lub flashover thaum lub sijhawm xob laim, muaj ntau yam kev xaiv, suav nrog:
Voltage pib:
Raws li tus nqi pib tas li, qhov flashover tshwm sim.
Yog tias qhov hluav taws xob thoob plaws qhov hloov pauv ntau dua qhov pib, qhov hloov hluav taws xob nyob ntawm qhov hloov tau raug kaw.
Lub waveform thiab lub sij hawm ntawm overvoltage tsis muaj bearing ntawm lub flashover voltage.
Volt-Time nkhaus:
Cov yam ntxwv uas tsis yog-linear volt-time yog siv los ua kom lub flashover.
Cov yam ntxwv volt-time sawv cev rau lub zog dielectric ntawm cov kab insulator raws li kev ua haujlwm ntawm lub sijhawm thaum lub sijhawm hloov pauv.
Yog tias qhov hluav taws xob thoob plaws qhov hloov pauv dhau ntawm qhov volt-time nkhaus, qhov hluav taws xob nyob ntawm qhov hloov mus kaw.
Lub flashover voltage yog proportional rau qhov loj thiab ntev ntawm lub overvoltage. Yog li ntawd, lub waveform yog coj mus rau hauv tus account.
Leader Progression Model (LPM):
Tus thawj coj lub cev qauv ua lub hauv paus rau lub flashover.
Qhov sib txawv voltage thoob plaws lub insulator ua lub hauv paus rau tus thawj coj propagation qauv.
Yog tias tus thawj coj ntev dua qhov ntev ntawm cov kab hluav taws xob, qhov hloov hluav taws xob nyob ntawm qhov hluav taws xob raug kaw.
Lub flashover voltage nyob ntawm qhov overvoltage qhov loj thiab lub sijhawm ntev. Yog li, lub waveform yog coj mus rau hauv tus account.