Chidziwitso Chokwanira cha Chitetezo Chachikulu cha Transformer ndi Chitetezo Chosunga Zosunga

Transformer ndi ntchito yopitilira ya zida zosasunthika, ntchito yodalirika kwambiri, mwayi wochepa wolephera. Koma chifukwa chakuti ma transformer ambiri amayikidwa panja, ndipo amakhudzidwa ndi ntchito ya katundu ndi mphamvu ya vuto la short circuit system, pakagwira ntchito, pamakhala mitundu yonse ya zolakwika ndi zochitika zachilendo.

1. Zolakwika ndi zolakwika zomwe zimachitika kawirikawiri pa ma transformer

2. Kapangidwe ka chitetezo cha transformer

3. Chitetezo chosakhala cha magetsi

(1) Kuteteza mpweya

(2) Chitetezo cha kuthamanga kwa magazi

(3) Chitetezo cha kutentha ndi kuchuluka kwa mafuta

(4) Chitetezo choziziritsa nthawi zonse

4. Chitetezo chosiyana

(1) Mphamvu yamagetsi yolowera mu transformer pogwiritsa ntchito maginito

(2) Mfundo ya chiletso chachiwiri chogwirizana

(3) Chitetezo chosiyana cha kusweka mwachangu

Mwachidule fotokozani izi pa chitetezo chachikulu cha transformer, ndipo pitirizani kuyambitsa chitetezo chosungira cha transformer. Pali mitundu yambiri ya makonzedwe otetezera osungira a transformer. Apa pali chiyambi chachidule cha mitundu iwiri ya chitetezo chosungira, chitetezo cha overcurrent ndi chitetezo cha grounding cha transformer.

1. Chitetezo champhamvu kwambiri pogwiritsa ntchito kutsekanso kwa mphamvu

2. Chitetezo cha pansi pa transformer

Chitetezo chosungira zinthu zobisika pa zolakwika za ma transformer akuluakulu ndi apakatikati pa nthaka nthawi zambiri chimaphatikizapo: chitetezo cha zero sequence overcurrent, chitetezo cha zero sequence overvoltage, chitetezo cha gap, ndi zina zotero. Izi ndi mawu oyamba achidule ozikidwa pa njira zitatu zosiyana zokhazikitsira nthaka za neutral point.

(1) Mfundo yosalowerera ndale ili ndi maziko enieni

(2) Mfundo yosalowerera ndale siili ndi maziko

(3) Mfundo yopanda mbali imakhazikika kudzera mumpata wotulutsira madzi

Ma transformer amagetsi amphamvu kwambiri ndi ma transformer okhala ndi insulation yochepa, ndipo insulation ya nthaka ya neutral point coil ndi yofooka kuposa ziwalo zina. Insulation ya neutral point imasweka mosavuta. Chifukwa chake, chitetezo cha gap chiyenera kukonzedwa.

Ntchito ya chitetezo cha mpata ndikuteteza chitetezo cha kutchinjiriza cha mfundo yosalowerera ya mfundo yosalowerera ya transformer.

Chitetezo cha gap chimachitika pogwiritsa ntchito gap current 3I0 yomwe ikuyenda kudzera mu neutral point ya transformer ndi open delta voltage 3U0 ya busbar PT ngati muyezo.

Ngati malo osalowerera a cholakwika akwera kufika pamalopo, malo osalowerera awonongeka ndipo magetsi akuluakulu a 3I0 amapangidwa. Panthawiyi, chitetezo cha malo osalowerera chimayamba kugwira ntchito ndipo chosinthira chimadulidwa pambuyo pochedwa. Kuphatikiza apo, pamene vuto la nthaka lachitika mu dongosolo, malo osalowerera amayambira pansi ndipo chitetezo cha zero cha chosinthira chimagwira ntchito, ndipo malo osalowerera amayambira pansi. Dongosolo litataya malo osalowerera pansi, ngati vutolo likadalipo, voteji yotseguka ya delta 3U0 ya busbar PT idzakhala yayikulu kwambiri, ndipo chitetezo cha malo osalowerera chidzagwiranso ntchito panthawiyi.