MOTLATSI LIHLAHLA

Lihlahla ke eng?

Lihlahla tsa motlakase ke likarolo tsa bohlokoa bakeng sa lisebelisoa tse fapaneng tsa motlakase tse kang li-transformer, li-shunt reactor le switchgears. Lisebelisoa tsena li fana ka thibelo e hlokahalang ea insulative pakeng tsa conductor e phelang le 'mele o tsamaisang oa lisebelisoa tsa motlakase sebakeng se ka tlase. Ts'ebetso ena ea bohlokoa e lumella lihlahla ho tsamaisa motlakase o phahameng ka har'a mokoallo oa conductive oa lisebelisoa tse koaletsoeng. Lihlahla tsa JIEOZU li etselitsoe ho thibela ho hloleha ha motlakase ho tloha ho flashover kapa ho phunya, ho fokotsa ho phahama ha mocheso ka tekanyo ea hona joale, le ho mamella matla a mochine ho tloha mofuteng oa mohala le katoloso ea mocheso.

Insulation ea ka hare ea bushing e tlameha ho mamella khatello ea motlakase eo e tla e mamella tšebeletsong. Likhatello tsena li bakoa ke phapang e ka bang teng ea motlakase ho tloha ho conductor e matlafalitsoeng ho ea ho likarolo tse theohileng tseo bushing e fetang ho tsona. Lits'ebetsong tsa motlakase o mahareng le o phahameng, insulation ea kahare e tlameha ho fokotsa ho qala ha partial discharge (PD) e ka 'nang ea theola thepa le bokhoni ba ho koala butle-butle.

Ho kenella ka ntle ho bushings ho na le likarolo tse ikhethileng tsa moralo joalo ka palo ea lishelu le sebaka se sephara ho fana ka karohano lipakeng tsa libaka tsa khokahano ea HV e matlafalitsoeng le matla a fatše ka ntle ho karolo. Sepheo sa likarolo tsena ke ho thibela arcing e omileng (flashover) le creep (leakage). Dry Arcing, e lekantsoeng ke BIL, e hloka sebaka se lekaneng hore bese e khona ho mamella tšusumetso ea motlakase ho tloha ho switjha le lehalima. Liketsahalo tsena li ka baka ho hloleha ha flashover moo arc ea motlakase e hlahang ho conductor ea HV ka kotloloho ho ea fatše haeba sebaka se sa lekana bakeng sa motlakase. Creep (Leakage) e etsahala ha tšilafalo e bokellana holim'a sehlahla 'me e fana ka tsela e tsamaisang hore hona joale e latele holim'a metsi. Ho kenyeletsoa ha sheds moralong oa lihlahla ho eketsa sebaka sa sehlahla pakeng tsa terminal ea HV le fatše ho thibela tahlehelo ea sekhahla.

JIEZOU e etsa lihlahla tsa epoxy tsa kahare le kantle bakeng sa lisebelisoa tsa switchgear, transformer & power appatus litlelaseng tse tlase le tse mahareng tsa voltage. Lihlahla tsa rona li entsoe le ho lekoa ho kopana le maemo a sebetsang a CSA, IEC, NEMA, le IEEE.

Li-Low Voltage Bushings li lekantsoe bakeng sa matla a fihlang ho 5kV/60kV BIL le Medium Voltage bushings li lekanyelitsoe bakeng sa matla a ho fihla ho 46kV/250kV BIL.

JIEZOU e etsa lihlahla tsa Epoxy, e leng sebaka se phethahetseng sa Porcelain Bushings mme se na le melemo e mengata. Sheba sengoloa sa rona mabapi le Epoxy Bushings vs Porcelain Bushings

Ho hlahisa li-transformer

Transformer bushing ke sesebelisoa sa insulate se lumellang conductor e matla, e tsamaeang hona joale hore e fete ka har'a tanka e theohileng ea transformer. A Bar-Type Bushing e na le conductor e hahiloeng kahare, athe Draw-Lead kapa Draw-Rod Bushing e na le tokisetso ea hore ho kenngoe conductor e arohaneng bohareng ba eona. Lihlahla tse tiileng (mofuta oa bongata) le lihlahla tse nang le matla a matla (mofuta oa condenser) ke mefuta e 'meli ea mantlha ea kaho ea lihlahla:

Lihlahla tse tiileng tse nang le porcelain kapa epoxy insulator hangata li sebelisoa e le libaka tsa khokahano ho tloha lehlakoreng la motlakase o tlase oa motlakase ho ea kantle ho transfoma.
Li-bushings tse nang le matla a matla li sebelisoa maemong a phahameng a tsamaiso. Ha li bapisoa le lihlahla tse tiileng, li batla li rarahane kahong ea tsona. Ho sebetsana le likhatello tse phahameng tsa motlakase tse hlahisoang ka matla a phahameng a motlakase, lihlahla tsa capacitance-graded li na le thebe e ka hare ea capacitance-graded, e kenngoeng pakeng tsa mokhanni ea tsamaisang hona joale o bohareng le insulator e ka ntle. Sepheo sa lithebe tsena tsa conductive ke ho fokotsa ho tsoa ka mokhoa o sa fellang ka tsamaiso ea tšimo ea motlakase ho pota-potile mokhanni oa setsi, e le hore khatello ea tšimo e tsepamisitsoe ka ho lekana ka har'a li-bushing insulation.

Tlhahisoleseding ya Sehlahiswa—1.2kV Plastic Molded Tri-clamp Secondary Bushing