3000 KVA IEC 60076 Power Transformers-88/11 KV|Afrika Boroa 2025

01 Kakaretso

1.1 Tlhaloso ea Morero

3000 kVA earthing transformer e ile ea isoa Afrika Boroa ka 2025. Matla a lekantsoeng a transformer ke 3000 kVA e nang le pholiso ea ONAN. Motlakase oa mantlha ke 88 kV o nang le ± 2 * 2.5% tapping range (NLTC), motlakase oa bobeli ke 11 kV, ba thehile sehlopha sa vector sa Dyn11.

E etselitsoe ho sebetsa maemong a thata a bophahamo ba 0-1800M, mocheso o fapaneng oa likhato tse -5 ho isa ho +45 tšilafalo e matla (mosi oa letsoai kapa oa indasteri), transformer ena e kopanya ts'ebetso e matla le litlhophiso tse ikhethileng ho fihlela litlhoko tsa sistimi ea phepelo ea motlakase.

Ka matla a lekantsoeng a 3MVA le tekanyo ea motlakase ea 88/11kV (frequency 50±2.5HZ), transformer e nka mapheo a koporo bakeng sa conductivity e phahameng le matla a mochine, a kopantsoe le mokhoa oa ho pholisa oa ONAN le khokahanyo ea Dyn11. Lintlha tsa bohlokoa tsa motlakase li kenyelletsa bonyane 8% e sitisang, NLTC ho-load tap{9}}changer (±2*2.5%, padlockable), 'me ha ho{12}}tahlehelo ea 3.9kW/20kW, e netefatsa hore ts'ebetso e sebetsa hantle ebile e tsitsitse. E na le sistimi e felletseng ea ts'ireletso, ho kenyeletsoa{16}}phatlalatso ea khase e phaphametseng (e nang le alamo le likhokahano tsa maeto), relay e ngata haholo ea mocheso (e lefshoa ka tikoloho, e behiloe ho 115 degrees ), valve ea ho imolla khatello, le themomethara ea oli e ka feto-fetohang (ho qala ho 90 degrees ), e fana ka litiisetso tse ngata tsa ts'ireletso tse fapaneng.

Ho ea ka sebopeho, transformer e na le tanka e cheselitsoeng e entsoeng ka Letlapa le leholo ho feta kapa le lekanang le poleiti ea tšepe ea 6mm (16mm base plate) le li-radiator tse chesang tse ka senyehang- tse nang le tanka e 'mala o moputsoa le seboloki se sesoeu (125μm e koahelang libaka tse silafetseng tse matla). E entsoe ntle le lirolara empa e na le motheo o tiileng o tsamaisanang le 1000mm{6}}li-slide tsa tšepe tse arohaneng, 'me e kopana le tšireletso ea IP55 bakeng sa lebokose la theminale. Likarolo tse phelang li boloka sebaka sa mobu sa 3500mm, 'me lihlahla tsohle, lithupa le li-terminals (E kholo ho feta kapa e lekanang le 19mm bakeng sa likhokahano tsa mathomo / tsa bobeli) li netefatsa matla a lekaneng a mochine. Ho feta moo, transformer e entsoe hore e sebetsane le 27% total voltage harmonic distortion on the low{13}voltage winding, e leng se etsang hore e be e loketseng bakeng sa liseseteme tsa transmission 11kV le 6.6kV litsing tse tsamaeang ka maoto.

1.2 Tlhaloso ea Setsebi

3000kVA IEC 60076 matla a li-transformers mofuta le leqephe la data

1.3 Litšoantšo

Setšoantšo sa 3000 kVA traction transformer diagram le boholo.

02 Tlhahiso

2.1 Tanka

Tanka ea 3MVA-88/11kV IEC 60076 e nang le li-transformer tsa motlakase e na le moralo o cheselitsoeng o tsamaellanang le li-radiator tse chesang{7}}dip galvanized, tse hahiloeng ka Greater ho feta kapa e lekanang le 6mm steel plate (16mm{10}tete base plate). E na le likhurumetso tsa tlhahlobo tse kentsoeng ka liboutu tse nang le litiiso tsa gasket le matshwaro a tiileng, 'me e tla ntle le lirolara empa e na le motheo o tiileng oa ho hloella holim'a li-slide tsa tšepe tse arohaneng tse 1000mm tse kentsoeng ka konkreite. E pentiloe bohlooho ka 125μm e koahetsoeng bakeng sa libaka tsa tšilafalo e matla, tanka e boetse e kenyelletsa sebaka se ka ntle sa mobu bakeng sa ho hokahanya likhoele tsa 95mm², ho netefatsa ho tšepahala le ho ikamahanya le maemo a thata a ts'ebetso.

2.2 Thermometers

The 3MVA-88/11kV IEC 60076 transformer e na le lithemometha tse peli: thermometer ea mofuta oa daela{8}}e nang le likhokahano tse feto-fetohang (hangata e ikemiselitse ho sebetsa ka likhato tse 90) le likhokahano tsa maeto tse kentsoeng 110V DC, 6A (mofuta o thusang oa ho fetisa mocheso ha ho hlokahala), le ho tsamaisa mocheso o eketsehileng ha ho hlokahala) e nang le matšeliso a mocheso a tikoloho, khokahano ea mocheso oa mojaro, le mabitso a maeto a behiloeng esale pele ka likhato tse 115 ka tekanyo e tšoanang ea 110V DC, 6A.

2.3 Lebokose la Taolo

Lebokose la taolo la transformer ena ea lefatše ke moalo o tiileng oa tšepe e sa jeleng paate o nang le lemati le bulehang, le ts'oaroang. Ka hare, e na le li-terminal blocks, likaroloana tse nyane tsa taolo (mohlala, li-relay / liletsa), le likhoele tse ngotsoeng; ka ntle, letšoao la "Exe-G2" le bonts'oa khoeleng e hoketsoeng, ha litšoelesa tsa masenke tse tlase li etsa hore ho kenoe ka makhethe, ho tšehetsa taolo ea ts'ebetso ea yuniti le phetiso ea mats'oao.

2.4 Radiator e nang le galvanized ea ho chesoa e ka tlosoang-

3MVA-88/11kV IEC 60076 li-transformer li na le li-radiator tse chesang tse senyehang-dip galvanized radiators: lisebelisoa tsena tse thibelang ho bola-tse thibelang ho bola,{7}}li-zinc{7}}li kopantsoe le tanka e cheselitsoeng ea yuniti, li tsamaisana le sistimi ea ONAN hore e khone ho futhumatsa habonolo, le ho tima ONAN habonolo. tlhokomelo-ho li etsa hore li tšoanele{9}maemo a sebetsang a tšilafalo e matla ea transformer.

2.5 LV Bushing

The {0}voltage porcelain bushing for the earthing transformer e na le insulator e tiileng, e benyang ea porcelain. Ha e le hantle ke flange-e behoang holim'a tanka ea transfoma, 'me theminale ea eona e tlase e fetela ka ho toba kapa e lahleloa ka har'a lebokose le khaolelitsoeng, le kentsoeng ka botlalo. Moralo ona o kopantseng o fana ka phetoho e matla, e tiisitsoeng, le e sirelelitsoeng ho tloha ho matsoelintsoeke a transfoma ho ea ho lithapo tsa motlakase tse kantle, ho netefatsa hore ho na le sebaka se tšepahalang le sa tlhokomelo{4}}se se nang botsoalle.

2.6 Oli Sampling Valve

E entsoe ka koporo, e fana ka khanyetso e ntle ea kutu le ho ts'epahala ho tiisa, e tsamaellanang le mochini o sebetsang oa oli ea transformer. E le karolo ea bohlokoa ea tlhokomelo ea kamehla le ho lekola maemo, valve ena e lumella ba sebetsang ho ntša lisampole tsa oli e kenang ka mokhoa o bonolo: lisampole tsena li lekoa bakeng sa matšoao a kang ts'ebetso ea ho kenya letsoho, boemo ba metsi le maemo a litšila, ho thusa ho lekola ka nako boleng ba oli le bophelo bo botle ba ts'ebetso ea kahare ea transformer. Moralo oa eona o kopaneng, o tiisitsoeng ha o boloke feela ho tiea ha sistimi ea oli empa hape o thusa ts'ebetso e potlakileng, e otlolohileng.

03 Ho etsa liteko

Teko ea Auxiliary Wiring Insulation Test e netefatsa botšepehi ba li-circuits tsohle tsa bobeli tsa taolo le ho beha leihlo (mohlala, bakeng sa matšoao a mocheso, lialamo, kapa li-fan controls) ka ho sebelisa motlakase oa DC, oo hangata e leng 500V kapa 1000V, pakeng tsa lithapo tse kopantsoeng le lefatše. Tekanyetso e lekantsoeng ea ho hanyetsa, e tlamehang ho feta tekanyo e fokolang e boletsoeng (hangata 1- 5 MΩ), e netefatsa hore ha ho na liphoso tsa fatše tse kotsi kapa litsela tsa ho lutla tse bakoang ke mongobo tse ka senyang botšepehi ba mekhoa ea tšireletso le ea ho beha leihlo, ka tsela eo ho sireletsa mesebetsi e tlatsetsang ea transformer.

04 Sebaka le Kakaretso

Ka kakaretso, transformer ea lefatše e sebetsa e le karolo ea bohlokoa lits'ebetsong tsa motlakase tsa sejoale-joale, ho netefatsa polokeho, botsitso le ts'epahalo. Ka ho fana ka ntlha e hlalositsoeng ea ho se nke lehlakore bakeng sa motheo, e sebetsana ka katleho le maqhubu a phoso, e fokotsa ho feta, le ho matlafatsa tšireletso ea lisebelisoa le basebetsi. Karolo ea eona ke ea bohlokoa ho boloka botsitso ba sistimi le ho thibela tšenyo nakong ea maemo a sa leka-lekaneng kapa a phoso. Ha marang-rang a motlakase a ntse a tsoela pele ho fetoha, bohlokoa ba litharollo tse matla le tse entsoeng hantle{3}e ntse e le tsa bohlokoa bakeng sa lisebelisoa tsa motlakase tse tšoarellang le tse sireletsehileng.