Olu hlobo lwezixhobo lubandakanya izixhobo zokuxhathisa, izixhobo zokulungisa ubushushu, njl njl. Izinto ezixhatshazwayo zocingo ezisetyenziswa kumthwalo wokufudumeza kombane zingafikelela kumaxesha angama-1.4 angoku. Ukuba ukunyuka kwamandla ombane kuqwalaselwa, okwangoku kuya kwanda. Uluhlu lwangoku lokuguquguquka kolu hlobo lomthwalo luncinci kakhulu, luyi-AC-1 ngokwecandelo lokusetyenziswa, kwaye umsebenzi awuqhelekanga. Xa ukhetha i-contactor, kuyimfuneko kuphela ukwenza i-rating yokusebenza yangoku Ith ye-contactor ilingana okanye ngaphezulu kwe-1.2 amaxesha asebenzayo ombane wokufudumeza umbane.
3.2 Ukukhethwa kwee-contactors zokulawula izixhobo zokukhanyisa
Kukho iintlobo ezininzi zezixhobo zokukhanyisa, kunye neentlobo ezahlukeneyo zezixhobo zokukhanyisa zineendlela ezahlukeneyo zokuqala zangoku kunye nexesha lokuqala. Uluhlu lokusetyenziswa kolu hlobo lomthwalo yi-AC-5a okanye i-AC-5b. Ukuba ixesha lokuqalisa lifutshane kakhulu, i-Ith yokufudumala yangoku inokukhethwa ukuba ilingane namaxesha angama-1.1 okusebenza ngoku kwezixhobo zokukhanyisa. Ixesha lokuqalisa lide kwaye i-power factor iphantsi, kwaye i-Ith yayo yokufudumala yangoku inokukhethwa ibe inkulu kunokusebenza ngoku kwezixhobo zokukhanyisa. Itheyibhile yesi-2 ibonisa imigaqo yokukhetha yabafowunelwa bezixhobo zokukhanyisa ezahlukeneyo.
Imigaqo yokukhetha yabafowunelwa bezixhobo zokukhanyisa ezahlukeneyo
Inombolo yothotho Igama lesixhobo sokukhanyisa Ukuqala unikezelo lwamandla Umba wombane Ixesha lokuqalisa Umqhagamshelwa okanye umgaqo wokukhetha umgaqo
1 isibane se-incandescent 15Ie1Ith≥1.1Ie
2 Ukukhanya okuxutyiweyo 1.3Ie≈13Ith≥1.1×1.3Ie
Isibane seFluorescent ≈2.1Ie0.4～0.6Ith≥1.1Ie
4Isibane soxinzelelo oluphezulu lwemercury≈1.4Ie0.4～0.63～5Ith≥1.1×1.4Ie
5 metal halide isibane 1.4Ie0.4～0.55～10Ith≥1.1×2Ie
Izibane ezi-6 ezinenombolo yoshicilelo lwamandla imbuyekezo 20Ie0.5～0.65～10 zikhethwa ngokuhambelana nesiqalo sangoku sembuyekezo yecapacitor.
3.3 Ukukhethwa kwee-contactors zokulawula ii-welding transformers zombane
Xa umthwalo we-low-voltage we-transformer uxhunyiwe, i-transformer iya kuba nexesha elifutshane eliphakamileyo eliphezulu ngenxa ye-short-circuit ye-electrodes kwicala lesibini, kwaye umsinga omkhulu uya kubonakala kwicala eliphambili, elinokufikelela kwi-15 ukuya kumaxesha angama-20 angoku. enxulumene neempawu ezingundoqo.Xa umatshini wokuwelda wombane uvelisa rhoqo amandla akhoyo ngoku, ukutshintshela kwicala eliphambili le-transformer.
> Ngaphantsi koxinzelelo olukhulu kunye nangoku, umnxibelelanisi kufuneka akhethwe ngokuhambelana ne-short-circuit current kunye ne-welding frequency yecala eliphambili xa i-electrodes ifutshane-ijikelezwe phantsi kwamandla alinganisiweyo we-transformer, oko kukuthi, ukutshintshwa kwangoku kukhulu kunoko. i-primary-side current xa icala lesibini lifutshane. Udidi lokusetyenziswa kwemithwalo enjalo yi-AC-6a.
3.4 Ukukhethwa kwesinxibelelanisi semoto
Abafowunelwa beemoto banokukhetha i-AC-2 ukuya kwi-4 ngokuhambelana nokusetyenziswa kwemoto kunye nohlobo lwemoto. Ukuqala ngoku kumaxesha angama-6 ukulinganisa okwangoku kunye nokuphulwa kwangoku kwi-current rated current, i-AC-3 ingasetyenziswa. Ngokomzekelo, abalandeli, iimpompo, njl., bangasebenzisa itheyibhile yokujonga Indlela kunye nendlela ekhethiweyo ye-curve ikhethwe ngokwesampuli kunye nencwadana, kwaye akukho sibalo esongezelelweyo esifunekayo.
I-winding current kunye ne-breaking current ye-motor yesilonda zombini zihlandlo ze-2.5 zangoku ezilinganisiweyo. Ngokuqhelekileyo, xa uqala, i-resistor ixhunyiwe kwi-series kunye ne-rotor ukunciphisa i-current current kunye nokwandisa i-torque yokuqala. Udidi lokusetyenziswa yi-AC-2, kwaye i-contactor ejikelezayo inokukhethwa.
Xa i-motor igijima, ibaleka i-reverse kunye ne-braking, i-current edibeneyo yi-6Ie, kwaye udidi lokusetyenziswa yi-AC-4, olunzima kakhulu kune-AC-3. Amandla emoto angabalwa kwimisinga edweliswe phantsi kweCandelo lokuSebenzisa i-AC-4. Ifomula imi ngolu hlobo lulandelayo:
Pe=3UeIeCOS￠η,
I-Ue: isantya semoto yangoku, oko kukuthi: amandla ombane alinganiswe yimoto, COS￠: umba wamandla, η: ukusebenza kakuhle kwemoto.
Ukuba ubomi boqhagamshelwano buvunyelwe ukuba bufutshane, i-AC-4 yangoku inokunyuswa ngokufanelekileyo, kwaye ingatshintshwa ibe yi-AC-3 kwi-frequency ephantsi kakhulu.
Ngokweemfuno zokulungelelaniswa kokhuseleko lweemoto, okwangoku ngaphantsi kwe-rotor evaliweyo yangoku kufuneka idibaniswe kwaye iphulwe sisixhobo sokulawula. I-rotor etshixiweyo yangoku yee-motor ezininzi ze-Y yi-≤7Ie, ngoko ke ukuvulwa kunye nokuvala i-rotor yangoku evaliweyo kufuneka kuthathelwe ingqalelo xa ukhetha i-contactor. Inkcazo ichaza ukuba xa i-motor isebenza phantsi kwe-AC-3 kwaye i-current rated ye-contactor ayikho ngaphezu kwe-630A, i-contactor kufuneka ikwazi ukumelana namaxesha angama-8 ngoku i-rerated current ubuncinane imizuzwana eyi-10.
Kwiimoto zezixhobo eziqhelekileyo, umsinga osebenzayo ungaphantsi kwangoku owenziweyo, nangona i-current current ifikelela kwi-4 ukuya ku-7 amaxesha angoku, kodwa ixesha lifutshane, kwaye umonakalo kubafowunelwa be-contactor awukho mkhulu. Lo mbandela uqwalaselwe kuyilo lwe-contactor, kwaye ukhethwa ngokubanzi Umthamo woqhagamshelwano kufuneka ube mkhulu kunamaxesha angama-1.25 amandla alinganisiweyo wemoto. Kwiimoto ezisebenza phantsi kweemeko ezikhethekileyo, kufuneka zithathelwe ingqalelo ngokweemeko zangempela zokusebenza. Ngokomzekelo, i-hoist yombane iyingxenye yomthwalo wempembelelo, umthwalo onzima uqala kwaye uyeka rhoqo, ukubuyisela uxhulumaniso lwe-braking, njl. , khetha amaxesha ama-4 umlinganiselo olinganisiweyo wemoto, ngokuqhelekileyo ukubuyisela uxhulumaniso phantsi komthwalo onzima I-braking current iphindwe kabini i-current current, ngoko-ke amaxesha angama-8 ombane olinganisiweyo kufuneka akhethwe kule meko yokusebenza.
Ixesha lokuposa: Jul-10-2023