Ungahlula njani phakathi kwesixhobo sokukhusela i-Surge (SPD) kunye nesithinteli sombane?

Ndakha ndaqhotsa ibhodi ye-CNC ye-$20,000 kuba ndadibanisa iibhokisi ezimbini ezikwiphaneli.

Ndithi kubathengi: i-SPD ngumlindi ngaphakathi kwiphaneli othintela ukunyuka okukhawulezileyo nokubukhali; umthinteli wombane ngumlindi ophahleni ojika ibholiti enkulu iye emhlabeni. Zifana, kodwa zigcina isipaji sakho ngeendlela ezahlukeneyo ngokupheleleyo.

Qhubeka ufunda kwaye ndiza kukubonisa iilebheli ezichanekileyo, iinombolo zovavanyo, kunye nezikhewu zamaxabiso endizijongayo xa ndingena kwisityalo ukuze ungaphindi uziphambanise.

Yintoni i Isixhobo sokukhusela ukugquma (I-SPD)?

Kunyaka ophelileyo nditshintshise "ibhokisi yotyando" engalunganga kwisityalo seplastiki saseFlorida ndaza ndayivala kabini.

Ndibiza i-SPD ngokuthi yiswitshi ekhawulezayo enciphisa i-6 kV iye kwi-600 V kwimizuzwana embalwa ukuze ii-drive, ii-PLC, kunye nezibane zisinde kwii-spikes zemihla ngemihla ezisebenza kwi-mains.

Ngaphakathi kwebhokisi yesinyithi

I-SPD inamacandelo amathathu kuphela: i-metal-oxide varistors (MOV), ityhubhu yokukhupha igesi, kunye ne-thermal disconnect. I-MOV isebenza njenge-automatic valve. Xa umgca utsiba ngaphezulu kwe-clamping voltage, ukumelana kwe-MOV kuyehla ukusuka kwi-mega-ohms ukuya kwi-ohms kwaye umbane ongezelelweyo uthunyelwa kwi-neutral wire. Ityhubhu yegesi iphatha amakhulu ambalwa okuqala e-nanoseconds ukuze i-MOV inganyibiliki. Ukuba i-spike inde kangangokuba iindawo zishushu kakhulu, i-thermal fuse iyavuleka kwaye ifestile encinci ebomvu iba mnyama. Oko kuthetha ukuba ulondolozo lufake ikhatriji entsha luze luvale ucango. Akukho msebenzi wophahla, akukho crane, akukho ngcali yombane kwi-harness.

Amanani endiwabhalayo kwisicatshulwa

Ndithumela umthengi ngamnye itafile yomgca omnye ukuze injineli yesityalo ikwazi ukujonga umzobo wephaneli kwimizuzwana emihlanu:

Intsomi eqhelekileyo endiyibulala kuyo yonke ifowuni

“I-SPD iza kundisindisa kumbane.” Hayi. Iya kukusindisa kwintsalela engena emva kokuba umntu obambe intambo epalini ekwenzile ukuphakamisa okunzima. Ukuba ulindele ukuba i-SPD ithathe i-100 kA direct strike, iidiski ze-MOV ziya kuqhekeka kwaye ityala leplastiki liya kunyibilika. Ndihlala ndithengisa ezi zibini: i-arrestor ngaphandle, i-SPD ngaphakathi.

Yintoni iLightning Arrester?

Ndema phezu kophahla lwendlu yokugcina impahla eTexas ngo-2022 ndaza ndabona intonga enesiketi seporcelain esiqhekekileyo; umphathi wesityalo wayecinga ukuba "sisinyithi nje."

Ndibiza isixhobo sokuthintela umbane ngokuthi yivalvu yokunciphisa uxinzelelo oluphezulu; inika umbane we-200 000 amp indlela ethe ngqo eya emhlabeni ukuze isakhiwo singaze sive isibhakela.

Indlela esebenza ngayo i-spark gap

I-arrester iphakathi komgca ophezulu kunye negridi yomhlaba. Ngaphakathi kukho inqwaba yeebhloko ze-varistor. Phantsi kombane oqhelekileyo womgca, i-stack yisekethe evulekileyo. Xa ilifu libetha, i-voltage itsiba iye kwizigidi zee-volts. Iibhloko ze-varistor ziqhuba ngoko nangoko kwaye umbane udlula kwi-copper down-conductor uye kwi-earth rod. Nje ukuba i-surge iphele, iibhloko ziyacima kwakhona ukuze umgca uqhubeke nokondla imithwalo. Lonke eli siganeko lithatha ii-microseconds ezili-100. Ukuba iibhloko zixabiso eliphantsi okanye ziqhekekile zihlala zifudumele; yiyo loo nto ndicela i-thermo scan rhoqo ngonyaka.

Iiklasi zeVoltage oza kuzibona kwi-nameplate

Ndicaphula ii-arresters kwiindidi ezintathu ukuze umthengi akwazi ukufanisa i-voltage yombane:

Umahluko kwiindleko phakathi kweTshayina kunye nophawu lwe-A

Isixhobo sokumisa i-polymer esingu-33 kV esivela kumgca wam weWenzhou sidlula kwi-IEC 60099-4 kwaye sixabisa i-$49. Imo efanayo evela kwikhathalogu ye-blue-chip yaseYurophu ibiza i-$210. Ndivumele uJeff ukuba enze uvavanyo lwe-15 kV impulse eHouston kwaye umahluko we-voltage eseleyo yayiyi-3% kuphela. Ubhukishe iziqwenga ezingama-200 zefama yomoya waza wonga i-$32 000.

Faka umgibe uninzi lwabathengi aluwuboni

Kufuneka ugcine umsila wobhedu oyi-1 m okanye i-inductance ijika ibe yi-1000 V ngemitha kwaye i-bolt iya kutsiba ecaleni. Ndithumela umzobo we-stencil kuyo yonke imithwalo ukuze umakhi angakwazi ukugoba ucingo lube yi-coil ecocekileyo ukuze "ibukeke icocekile."

Ziziphi iiyantlukwano eziphambili phakathi kwe-SPD kunye ne-Lightning Arrester?

Ndakha ndalahlekelwa yi-odolo entsha kuba umthengi wafaka zombini ezi zinto phantsi kwe-"surge stuff" waza wathenga ii-arresters ezimbini zekhabhinethi.

Ndigcina ikhadi lokukhohlisa epokothweni yam: i-arrester iphatha umbane omkhulu we-100 kA ngaphandle, i-SPD inqumla okuseleyo okuncinci kwe-20 kV ngaphakathi; zahlukile ngamandla, isantya, indawo kunye nexabiso.

Ugqatso lwamandla – 1000: 1

Ukubetha kombane ngqo kunokukhupha ii-megajoules ezili-1000. I-arrester yam enkulu ye-33 kV ivavanyiwe ukuze ifunxe i-10 kJ/kV, malunga ne-300 kJ iyonke. I-SPD yephaneli ivavanywa kwi-320 J kuphela kwidiski nganye ye-varistor. Yiyo loo nto sizibeka kwinqanaba: i-arrester itya inyama yenkomo, i-SPD itya iimvuthuluka.

Umdyarho wesantya – 1 vs 100 microseconds

Ibhowudi inyuka kwi-microsecond enye. Umsantsa wegesi ngaphakathi kwe-arrester uvutha kwi-0.1 µs. I-MOV ngaphakathi kwe-SPD ifuna ii-nanosecond ezingama-25, kodwa ilandela intambo ende ngoko ke umphambili sele ucothisiwe. Ukuba utshintshana ngezi zimbini, i-MOV iyaqhuma ngaphambi kokuba i-arrester ivuke.

Umdyarho wamaxabiso – 50: 1

I-Arrester $49, i-SPD $18. Beka ebiza kakhulu eluphahleni apho kufuneka iyunithi enye kuphela, kwaye engabizi kakhulu kuyo yonke iphaneli apho ufuna amashumi amabini khona.

I-SPD izikhusela njani izixhobo zombane?

Ndibone ivenkile yokubhaka yaseFlorida ilahlekelwa ziimoto ezintathu ezitshintsha-tshintshayo kwinyanga enye de safumana ii-DIN-rail SPDs ezimbini ebhasini.

Ndichazela abaphathi bezityalo ukuba i-SPD yi-voltage clamp; ibona i-spike isondela, itshixize ucango, ize ivumele kuphela i-600 V ekhuselekileyo ukuba idlule kwii-PLC kunye nee-drive zakho.

Inyathelo ngenyathelo ngamazwi alula

1. I-spike ingena kuMgca woku-1.
2. I-MOV iyaziva i-over-voltage kwaye ukuxhathisa kwayo kuyawa.
3. Umsinga owongezelelweyo utyhalelwa ecaleni kwibha engathathi cala.
4. I-voltage ephakathi koMgca woku-1 kunye nowe-neutral ayinyuki ngaphezu kwe-1.2 kV.
5. Isigaba sokufaka idrayivu sibona kuphela i-480 V kunye ne-ripple encinci kwaye siyaqhubeka nokusebenza.

Amanani okwenyani avela kwibhentshi yam yovavanyo

Ndidubule igagasi le-6 kV 3 kA 8/20 µs kwi-40 kA SPD. I-voltage eseleyo kwiingcingo zokukhupha yayiyi-960 V. I-drive eqhelekileyo ye-480 V inokusinda kwi-1.5 kV, ngoko ke i-margin yi-540 V. UJeff ucele i-margin yokhuseleko ye-20%; sikhethe imodeli ye-60 kA saza safumana i-780 V eseleyo. Wayeka ukuthenga ii-drive ezingasetyenziswanga.

Itafile endiyishiyayo namaqela olondolozo

Ukuba kukho ibhokisi engasebenziyo, susa ikhatriji uze ufake entsha. Akukho zikrudrayivu, akukho kucima.

Isithinteli sombane sizikhusela njani iinkqubo zamandla?

Ndibukele umgca we-33 kV eIndiya udlula unyibilikisa i-200 m ye-aluminium de safaka ii-polymer arresters kuyo yonke ipali.

Ndixelela abathengi beenkonzo zikagesi: i-arrester yivalvu yokunciphisa uxinzelelo esibhakabhakeni; ibamba i-surge ye-million-volt ize iyilahle kwi-earth grid ngaphambi kokuba i-transformer oil ibile.

Umlinganiselo weVolthi xa kuthelekiswa nombane wenkqubo – umthetho we-25%

Khetha isixhobo sokumisa esilinganiswe kwi-75% ye-voltage ye-line-to-line yenkqubo. Kwinkqubo ye-33 kV ndikhetha isixhobo sokumisa esingama-30 kV. Oko kunika umda we-25% ukuze isixhobo sokumisa singaqhubeki xa kushushu rhoqo, kodwa sisadubula ngaphantsi kakhulu kwinqanaba lokugquma ucingo le-170 kV.

Ukujonga amandla ngobude be-down-conductor

Amandla ekufuneka i-arrester iwafunxe akhula ngesikwere somsinga wokubetha kunye nobude bomsila we-copper. Ndisebenzisa ifomyula E = 0.5 × L × I². Kwi-stroke ye-100 kA kunye ne-1 µH/m kumsila we-2 m, i-E = 0.5 × 2 × 100 000² = 10 MJ. I-arrester yam ye-33 kV ivavanyiwe ukuya kwi-10 kJ/kV × 30 kV = 300 kJ. Igridi yomhlaba kufuneka itye okuseleyo, ngoko ke ndigxininisa kwi-≤4 Ω ukumelana nomhlaba.

Uphononongo lwetyala - ifama yomoya eTexas

Iiturbine ezili-100, nganye inomgca wokuqokelela we-34.5 kV. Sifake i-arrester enye kwipali yesithathu nganye nakwi-transformer nganye. Kwiminyaka emibini kamva uhlaselo oluthe ngqo lwafika kwisigaba B. I-arrester yadubula, i-recloser yavula yaza yavala, kwaye iiturbine azizange zime. Ngaphandle kwee-arresters, umbane ngewawuhlawule i-$50 000 kwisohlwayo sokulahleka kwemveliso.

Ziziphi iindlela eziqhelekileyo zokusetyenziswa kwe-SPDs kunye ne-Lightning Arresters?

Ndingene kumzi-mveliso wezihlangu waseVietnam owawuchithe i-$8 000 kwiintonga zophahla kwaye uchithe i-zero kwiiphaneli; oomatshini babo be-CNC basasilela kuzo zonke iziphepho.

Ndibhala umthetho olula ebhodini elimhlophe: ababambeleli balinda igridi ngaphandle, ii-SPD zilinda iitships ngaphakathi; beka nganye apho ivavanyiwe khona okanye utshise imali kabini.

Apho ndithengisa khona ii-SPD

- Iidrives eziguquguqukayo kwimigca yeplastiki yokukhupha

- Iirakhi ze-PLC kwizityalo zokufaka iibhotile

- Izibane zemidlalo ze-LED kwiisekethe ze-480 V

- Iiphaneli zokufaka ze-UPS zeziko ledatha

Apho ndithengisa khona izinto zokubamba

- Iintambo eziphezulu ze-33 kV ezithutha iifektri zeoyile yesundu

- Iitransformer ezithatha amanyathelo omoya ngeturbine

- Iibhokisi zokudibanisa zeSolar 1500 V DC

- Izikhululo zokuhambisa uloliwe

Imisebenzi exutyiweyo - zombini izixhobo

Izibhedlele: ababambeli kwi-11 kV incomer, ii-SPDs kwiphaneli nganye yomgangatho.

Amaziko edatha: izithinteli kwi-vault yombane, ii-SPD kwi-UPS, ii-SPD kwakhona kwiirakhi zeseva.

Isityalo sikaJeff samva nje seplastiki: ii-arreters ezingama-30 kumgca wepali, ii-SPD ezili-120 ngaphakathi kwisityalo. Wayeka ukuthenga amakhadi e-I/O aseleyo.

Zifakwa phi ii-SPD kunye neeLightning Arresters?

Ndakha ndabona iqela lokulungisa libopha i-SPD kwisinyithi sophahla; isivuthuvuthu sokuqala savuthuza ii-varistor kwisigqubuthelo seplastiki.

Ndinika wonke umntu osebenza kwikontrakta umfanekiso wephepha elinye: umntu obambezelayo uhlala epalini okanye eluphahleni, i-SPD ihlala ngaphakathi kocango lwephaneli kwi-35 mm DIN rail; gcina iingcingo zimfutshane kwaye zithe tye kungenjalo i-inductance iya kuyibetha loo ndawo.

Iteyiphu yokukopa yephepha lokucoca ngaphakathi kweengcango zephaneli

Umzobo wophahla lukaJeff I

1. Isiphelo somoya (intonga) kwibharki ephezulu.
2. I-down-conductor 2 AWG copper, eyona ndlela imfutshane ukuya kwi-earth rod.
3. I-Arrester ifakelwe eludongeni, icala elihambelana nesixhobo sombane, icala lomhlaba kwintonga efanayo.
4. Ngaphakathi kwi-switchboard ephambili, i-SPD ikwibhasi, umhlaba uye kwibha yobhedu.

Igridi enye yomhlaba, imisebenzi emibini, akukho kudideka.

Uyikhetha Njani Isixhobo Esifanelekileyo Kwiimfuno Zakho?

Umthengi eMalaysia wakha wandithumelela i-RFQ ye-"surge things" ndaza ndacaphula ama-500 kuyo nganye; wayefuna ii-SPD kuphela.

Ndibuza imibuzo emithathu: yeyiphi i-voltage ekwi-wire, yeyiphi i-energy enokuyibetha, kwaye iphi i-wire? Yiphendule loo mibuzo ize inombolo yenxalenye izibhale ngokwayo.

Umthi wesigqibo endiwuthumela nge-imeyile kubathengi

1. Ingaba ucingo luphambi kwemitha okanye emva kwayo?

– Ngaphambi → umbambeli.

– Emva → yiya ku-2.

2. Ingaba i-spike ivela kumbane okanye kwimithwalo engaphakathi?

– Umbane → isithinteli ngaphandle + i-SPD ngaphakathi.

– VFD, umthumeli, umnxibelelanisi → SPD kuphela.

3. Ithini i-voltage yenkqubo?

– 120 V, 277 V, 480 V, 690 V → khetha i-SPD ene-Uc 15% ngaphezulu kwesiqhelo.

– 6 kV, 11 kV, 33 kV → i-pick arrester inikwe i-75% ye-line voltage.

Itheyibhile yokukhetha ngokukhawuleza endiyiprintayo kwiingcaphuno

Biyela umqolo, sayina i-PO, vala ifayile.

Ii-SPD kunye neeLightning Arresters kufuneka zigcinwe kwaye zivavanywe njani?

Ndindize eJamani ngoMatshi ophelileyo kuba ifestile ye-SPD yaba mnyama emva kweenyanga ezintandathu kuphela; isityalo sasibuyisele umva i-neutral.

Ndiqeqesha amaqela: ndijonga ifestile rhoqo ngekota, ndilinganisa ukuvuza kanye ngonyaka, kwaye ndijonga izixhobo zokuthintela ukuvuza emva kwesiphango ngasinye; ukuba umzimba wesixhobo sokuthintela ushushu ngaphezu kwe-10°C, sitshintshe ngaphambi kokuba siqhume.

Uluhlu lokuhlola olunephepha elinye ndiluncamathisela kwiingcango zephaneli

Ikhithi yezixhobo ezingasetyenziswayo ndiyithumela nayo yonke iodolo

- Iikhatriji zeMOV ezongezelelweyo ze-5% zee-SPD

- Iindlu ezimbini ezongezelelweyo zepolymer zezixhobo zokubopha

- I-thermometer ye-infrared e-1, imodeli ye-DT-380

UJeff ugcina izixhobo kwigumbi levenkile; ixesha lokungasebenzi liye lehla ukusuka kwiiyure ezisi-8 ngonyaka ukuya kwi-zero.

Isiphelo

Ndakhe umzi-mveliso ongama-2 000 m² ndaza ndathumela izixhobo ezingama-300 000 ngokujonga umthetho omnye olula: i-arrester ngaphandle, i-SPD ngaphakathi.

Vula iphaneli yakho, ujonge iingcingo, uze u-ode umlindi ofanelekileyo namhlanje—oomatshini bakho kunye nomgcini-mali wakho baya kukubulela.