Me ke Valve Type Lightning Arrester?

Me kadan Arrester na Rai na Valve?

Ta'adani

Arrester na rai wanda ya shiga da gabashin karamin karamin ko kafuwa masu kontrola mai kyauwa. Gabashin bayanen yana ba da kudaden kudacewar kyau a kan arrester, amma idan kudaden bayanen ya kusa da kudaden kudacewar gaba. Arrester na valve tana cikin haka ake kira gap surge diverter ko silicon carbide surge diverter ta hanyar gabashin.

Kudancin Arrester na Rai na Valve

Arrester na valve yana cikin gabashin karamin karamin da suka shiga da resistor da aka yi daga abu mai tsawon sauci. Karamin bayanen yana da biyu. Don in ba da kudancin gabashin karamin karamin, resistors mai tsawon sauci suka shiga da karamin karamin a kan gabashin karamin karamin.

Resistor elements suka yi daga silicon carbide da binders mai lafiya. Duka al'adun suka zama a kan kasuwanci mai girma da ke nuna nitrogen gas ko SF6 gas.

Yadda Arrester na Rai na Valve Ya Kula

A cikin kudaden kudacewar gaba, saboda influencen da parallel resistor yake iya haɗa, babu spark-over wanda ya faru a kan gabashin. Kiyasin kudaden kudacewar gaba baki daya ba za su iya haɗa ba. Amma, idan kiyasan kudaden kudacewar gaba mai sauƙi suka faru a kan terminalen arrester, air-gap spark na current ya ciɗa zuwa ground ta hanyar resistor mai tsawon sauci, wanda yake da resistance mai kadan.

Ba a ƙarin wannan surge, kudaden kudacewar gaba da aka faru a kan arrester ya ƙara, da resistance na arrester ya ƙara har zuwa lokacin da kudaden kudacewar gaba ya ƙara. Idan surge diverter action ceases, small low-power-frequency current ya ciɗa a kan hanyar flash-over. Wannan current tana ciki a cikin power follow current.

Magnitude na power follow current ya ƙara zuwa value wanda zai iya ciɗa ta hanyar spark gap idan yake da dielectric strength. Power follow current ya ciɗa a farkon zero-crossing na current, da power supply ya ƙara daidai. Ba a nan, arrester ya ƙara don kula da kula. Wannan process tana ciki a cikin resealing na arrester na rai.

Tarihin Arrester na Rai na Valve

Idan surge ya samu transformer, ya faru arrester na rai, kamar yadda ake nuna a cikin hoton. A cikin approximately 0.25 μs, kudaden ya samu breakdown value na series gap, da arrester ya faru discharge.

Idan kudaden kudacewar gaba ya ƙara, resistance na non-linear element ya ƙara. Wannan tana iya ba da discharge mai sauƙi, don haka ya ƙara kudaden kudacewar gaba da aka faru zuwa terminal equipment, kamar yadda ake nuna a cikin hoton.

Idan kudaden kudacewar gaba ya ƙara, current da ya ciɗa zuwa ground ya ƙara, da resistance na arrester na rai ya ƙara. Arrester na rai ya samu tarihi inda current flow ya ciɗa ta hanyar spark gap, da arrester ya ƙara don seal.

Kudaden kudacewar gaba mafi yawa wanda ya faru a kan terminal na arrester da aka faru zuwa terminal equipment tana ciki a cikin discharge value na arrester.

Abubuwan Arrester na Rai na Valve

Arrester na rai na valve zai iya kasa a cikin station types, line types, arresters for the protection of rotating machines (distribution type), ko secondary type.

• Station-Type Valve Lightning Arrester：Wannan abubuwan arrester na valve tana amfani a cikin sarrafa abubuwan karkashin kwalliya a cikin circuits daga 2.2 kV zuwa 400 kV da sauransu. Yana da high energy-dissipation capacity.

• Line-Type Lightning Arrester：Line-type arresters tana amfani don sarrafa abubuwan substation. Suna da area masu karamin karamin, suna da wuri, da kuma adadin sauri. Daga station-type arresters, suna da higher surge voltage across their terminals da kuma lower surge-carrying capacity.

• Distribution Arrester：Wannan abubuwan arrester tana amfani a cikin sarrafa generators da motors.

• Secondary Arrester：Wannan abubuwan arrester tana amfani don sarrafa abubuwan low-voltage. Arrester for protecting rotating machines tana amfani don sarrafa generators da motors.