Ungayikhetha njani isixhobo esifanelekileyo sokukhusela utyando lweSigaba esinye?

Ungayikhetha njani isixhobo esifanelekileyo sokukhusela utyando lweSigaba esinye?

Ndiqhotse oomatshini ababini bekofu kunye nesilawuli se-CNC esixabisa i-$3,800 ngaphambi kokuba ndivume ukuba bendingazi nokuba i-surge ibukeka njani.

Ndikhetha i-SPD yesigaba esinye ngokukhangela amanani amathathu: umbane ophezulu we-surge (kA), inqanaba lokukhusela i-voltage (VPR), kunye nomlinganiselo we-short-circuit (SCCR). Zilinganisele ezo mpawu nobungakanani be-breaker yakho kunye nobunzima bomthwalo, kwaye isixhobo siya kuhlala ixesha elide kunezixhobo esizikhuselayo.

Qhubeka ufunda ukuba ufuna isihluzo esifanayo semizuzu emithathu endisisebenzisayo ukuze ndingaphindi ndichithe ixesha kwiphepha ledatha elingalunganga.

Ukuqonda Amandla eSigaba esinye?

Bendisoloko ndicinga ukuba “i-single-phase” ithetha ucingo olunye de ndavuthuza i-fuse ndaza ndabona iingcingo ezimbini kunye nomhlaba kwiphaneli.

Amandla esigaba esinye yinkonzo ye-230 V okanye i-120 V eneengcingo ezimbini ezondla amakhaya nakwiivenkile ezincinci. I-hot conductor enye, enye engathathi cala, kunye ne-sine wave ephindaphindayo zikunika wonke amandla owadingayo kwizibane, iilaptops, kunye neelathe.

Kutheni imo yamaza ibalulekile

I-sine wave ifikelela kwi-325 V peak kwinkqubo ye-230 V. I-surge idlula phezu kwe-peak kwaye inokufikelela kwi-600 V kwi-microseconds. Ukuba i-SPD yakho ilinganiswe kwi-275 V RMS, iya kudubula kwangethuba kwaye inqumle umphezulu we-wave. Ukuba uthatha imodeli ye-420 V kuba ingabizi kakhulu, i-surge iya kuhamba ngqo kwi-VFD yakho. Ndigcina i-oscilloscope epokothweni kwibhokisi yam yezixhobo; ukujonga nje i-clipped wave kundixelela ukuba ndikhethe udidi lwe-voltage olufanelekileyo.

Itheyibhile 1: Iivoltage eziqhelekileyo zesigaba esinye xa kuthelekiswa nodidi lwevolthi ye-SPD olucetyiswayo

Yintoni Ukhuseleko Lokunyuka Kwesigaba Esinye?

Ndixelele umthengi wam ukuba i-surge protector yinto nje yombane enomtsalane; undithumelele ityala lokulungisa i-laser cutter.

Isixhobo sokukhusela ukuvuza kwesigaba esinye sisixhobo esincinci esifakwa ecaleni kwephaneli yakho ye-breaker. Ngaphakathi, ii-varistors ze-metal-oxide (ii-MOV) okanye iityhubhu zegesi zijika umbane ogqithisileyo uye emhlabeni ngaphantsi kwemizuzwana engama-25, zigcina imithwalo yakho ingaphantsi kwe-voltage yazo yokumelana.

Iindawo onokuzibona

Vula i-plastic case uze ufumane iidiski ezintathu ezibonakala ngathi ziingqekembe. Ezo zii-MOV. I-thermal fuse ihleli ecaleni kwediski nganye; ukuba i-MOV ishushu kakhulu, i-fuse iyavuleka kwaye i-LED eluhlaza iyacima. Ndakha ndayinqumla iyunithi engasebenziyo; ucingo lwe-fuse lwaluphelile kwaye i-MOV yayisele imnyama. Loo mbono undisindise ekufakeni i-dead protector.

Itheyibhile 2: Iindawo zangaphakathi kunye nento ezizibulalayo

Isebenza njani isixhobo sokukhusela ukugqabhuka kwesigaba esinye (i-SPD yesigaba esinye)?

Ndibukele i-40 kA ibetha kwi-logger yam; i-voltage kwindawo yokuphuma inyuke nge-90 V endaweni ye-1,200 V.

I-SPD ihlala phezu kwe-line-neutral kunye ne-line-earth. Xa i-surge ifika, izinto zayo zangaphakathi zitshintshela kwi-low-impedance state kwi-nanoseconds. I-surge current ihamba nge-SPD, hayi kwiprinta yakho, kwaye i-clamping voltage ihlala ngaphantsi komda womonakalo womthwalo obuthathaka.

Ijika lokubambelela

Yonke iMOV inegophe elibonisa i-voltage xa ​​ithelekiswa ne-current. Kwi-1 mA iMOV iqala ukuqhuba; kwi-1 kA i-voltage iphezulu ngama-50%. Ndigquma loo gophe phezu kwe-standby spec ye-CNC yam. Ukuba i-CNC iyafa kwi-800 V kwaye iMOV ifike kwi-820 V kwi-3 kA, ndiye kwi-MOV enkulu okanye ndongeze inqanaba lesibini. Andiyithembi ikhathalogu yodwa; ndidweba imigca emibini ndize ndikhangele isithuba.

Umgaqo-nkqubo Wokusebenza Wokukhusela Ukunyuka Kwesigaba Esinye?

Bendisoloko ndicinga ukuba "umgaqo osebenzayo" yayikukungakhathali kwezentengiso de ndafumana intlantsi eyatsiba kwibhloko yesiphelo.

Umgaqo osebenzayo kukudilika kwe-impedance elula. Phantsi kwe-voltage eqhelekileyo i-SPD ibukeka njengesekethe evulekileyo. Xa i-surge yongeza amandla ongezelelweyo, ii-MOV grains ziyaqhekeka, zenze i-short, kwaye ziqhubele amandla emhlabeni. Emva kokuba i-surge iphelile, i-MOV iyaphinda iqalise kwaye ilinde i-hit elandelayo.

Ukwabelana ngamandla ngaphakathi kwiyunithi

Ukunyuka kwe-20 kA akuhlali kwi-MOV enye. Le yunithi isebenzisa ii-MOV ezintathu ngaxeshanye ngoko ke idiski nganye itya malunga nesinye kwisithathu. Ukuba i-MOV enye iyaguga ngokukhawuleza, ukumelana kwayo kuyehla kwaye iba umbane omninzi, ishushu, kwaye i-fuse yobushushu iyibulale. Oko kufa kumnandi kugcina ezinye ezimbini ziphila. Ndisoloko ndijonga iikhowudi zomhla; ii-MOV ezivela kubudala obufanayo ngesantya esifanayo, ngoko ke izixhobo zam zokutshintsha ziphethe izitampu zomhla ezifanayo.

Ungayifaka njani iSikhuseli soKhuphelo lweSigaba esinye?

Ndakha ndaxhuma i-SPD ngasemva; i-LED yahlala iluhlaza kodwa ukhuseleko lwanyamalala njengomsi.

Cima i-breaker ephambili. Qhagamshela umgca we-SPD kwicala lomthwalo we-breaker, u-neutral kwi-neutral bar, nomhlaba kwi-earth bar. Gcina iileads zimfutshane kune-30 cm, zijike kunye, kwaye u-torque ibe yi-2 Nm. Vala iphaneli, uvule, kwaye uqinisekise ukuba izibane ze-LED eziluhlaza aziguquguquki.

Uvavanyo lobude be-lead endilwenzayo kuyo yonke imisebenzi

Ndisebenzisa ijenereyitha yesignali ye-1 MHz kwaye ndincamathisela intambo ye-10 cm kuzo zonke iiterminal ze-SPD. Ukwehla kwe-voltage kuphindaphindeka kabini xa ndongeza enye i-10 cm. Loo vavanyo lundibonisa ukuba i-30 cm ngumda onzima; isentimitha nganye eyongezelelweyo yongeza malunga ne-40 V kwi-let-through. Ukuba iphaneli ixinene, ndifaka i-SPD emnyango ndize ndisebenzise ubhedu olulukiweyo; imo ethe tyaba inciphisa i-inductance ngesiqingatha.

Ukusetyenziswa kweZikhuseli zoKhukuliso lweSigaba esinye kwiShishini elincinci?

Ivenkile yokubhaka yomthengi wam ilahlekelwe zii-oven ezintathu ngesiphepho esinye; indoda yeinshorensi yathi “lilishwa” de sambonisa i-SPD enyibilikisiweyo esayilungisa ngosuku olulandelayo.

Ii-SPD zesigaba esinye zigada iirejista zemali, oomatshini be-espresso, ii-routers ze-CNC, kunye ne-CCTV kwiivenkile ezincinci. Zingena ngaphakathi kwirakhi ye-1U okanye zixhonywe kwireyile ye-DIN ecaleni kwemitha. Iyunithi enye ye-20 kA igcina umgca wonke wokubhaka usebenza ngexesha leendudumo.

Icebo lokufaka amaqela endilisebenzisayo

Ndibhala zonke izixhobo ezingaphantsi kwe-16 A kwaye ndiziphawule njenge "esibucayi" okanye "esiqinileyo." Imithwalo ebuthathaka efana ne-PLC yabelana nge-SPD enye kunye ne-550 V VPR. Imithwalo enzima efana nezifudumezi ihleli emva kwe-SPD yesibini ene-650 V VPR. Ukwahlulahlula kunciphisa iindleko kuba imodeli ye-650 V itshiphu ngama-30%. Ispredishithi yam ibonisa umniniyo ukonga i-$210 kunye nexesha elifutshane lokufumana imali evela kumzi-mveliso wethu waseWenzhou.

Imithetho Yokufakela Ekufuneka Ilandelwe?

Ndakha ndasika iikona ndaza ndabaleka iilead ezingama-50 cm kuba i-DIN rail yayibukeka intle; umhloli wandinyanzela ukuba ndiyikrazule.

Landela le mithetho mine: gcina iileads zingaphantsi kwe-30 cm, sebenzisa i-16 mm² copper, yongeza i-32 A breaker phezulu, kwaye ufake i-SPD emva kwemitha kodwa ngaphambi kwe-RCD. Thobela ikhowudi yendawo: eJamani sebenzisa i-VDE 0100-443, e-UK landela i-BS 7671 534.

Itheyibhile 3: Uluhlu lokuhlola olukhawulezileyo endilunika abasebenzi bam

Isiphelo

Khetha amanani, usike iileyiti, uqinise izikrufu, kwaye i-SPD yakho yesigaba esinye iya kufa ukuze oomatshini bakho bangafi.

Ndithumelele i-imeyile ku-caroline@leikexing.com ukuze ufumane ikowuteshini yephepha elinye kwaye siza kuthumela ibhetshi yakho eyenziwe ngokwezifiso ukusuka eWenzhou kwiintsuku ezili-15.