Sonke siyazi ukuba akulula ukukhetha icandelo lokukhusela ngokufanelekileyo. Ipharamitha yeso sixhobo sokukhusela asifani neparameter ye-smartphone ecacileyo kwaye kulula ukuyiqonda kubantu abaninzi. Kuninzi ukungaqondani xa ukhetha i-SPD.

Enye yokungaqondani okuqhelekileyo kukuba ubukhulu bokwanda ngoku (ngokulinganiswa kwi-kA kwisigaba ngasinye), ngcono i-SPD. Kodwa okokuqala, masazise ukuba sithetha ntoni ngokuhlinzwa ngoku. Utyando lwangoku kwisigaba ngasinye lelona nani liphezulu loqhaqho langoku elinokutyunyuzwa (ngenqanaba ngalinye lesixhobo) ngaphandle kokusilela kwaye kusekwe kumgangatho we-IEEE standard 8 × 20 microsecond test waveform. Umzekelo, xa sithetha nge-100kA SPD okanye nge-200kA SPD. Sithetha ngobuninzi bayo ngoku.

Umthamo wangoku weSurge yenye yezona parameters zibalulekileyo zeSPD. Ibonelela ngomgangatho wokuthelekisa isixhobo sokhuselo lotyando olwahlukileyo. Kwaye abavelisi be-SPD bayacelwa ukuba badwelise umthamo wangoku weeSPD zabo. Kwaye kumthengi, bayaqonda ukuba i-SPD efakwe kumnyango wenkonzo kufuneka ibe nomthamo ophezulu wokunyuka ngoku ngokuthelekisa i-SPD efakwe kwiipaneli zesebe.

Ke nantsi ingxaki iza, abantu abaninzi bakholelwa ukuba i-200kA SPD ingcono kune-100kA SPD. Yintoni engalunganga ngolu luvo?

Okokuqala, ayithatheli ngqalelo iindleko. Ukuba i-200kA SPD ixabisa ngokufanayo ne-100kA SPD kunye nezinye iiparamitha ziyafana, ngenene kufuneka uthenge i-200kA SPD. Nangona kunjalo inyaniso kukuba, i-200kA SPD ixabisa ngaphezulu kwe-100kA imodeli ngoko kufuneka sibale ukuba ukhuseleko olongezelelweyo olunikezelayo luxabisa imali eyongezelelweyo.

Okwesibini, i-200kA SPD ayiyimfuneko ukuba ibe nomlinganiselo ophantsi wokukhusela umbane (VPR) kune-100kA SPD. I-VPR yi-voltage eshiyekileyo eya kuthi ibeke kwisixhobo sombane esisezantsi.

Ngoko ke ngaba utsho ukuba i-SPD esezantsi yokunyuka kwangoku yanele kwaye iSPD ene-kA enkulu yinkcitho yemali kuphela.

Hayi. Mangaphi i-kA onokuthi ukhethe ixhomekeke ikakhulu kwisicelo. Nokuba i-asethi ekhuselweyo ibekwe kwindawo ephezulu, ephakathi okanye ephantsi yokuvezwa ichaphazela ubungakanani beSPD oyikhethayo.

I-IEEE C62.41.2 ichaza iindidi zotyando olulindelekileyo kwiziko.

  • Udidi C: Indawo yokungena yenkonzo, imekobume eqatha: 10kV, 10kA surge.
  • Udidi B: Umsinga osezantsi, omkhulu kuno okanye olingana ne-30 ft ukusuka kudidi C, okusingqongileyo okungaphantsi kobunzima: 6kV, 3kA surge.
  • Udidi A: Ukuqhubela phambili emazantsi omlambo, mkhulu kuno okanye olingana ne-60 ft ukusuka kudidi C, okusingqongileyo okuncinci okunobunzima: 6kV, 0.5kA surge.

Ke ukuba une-asethi kwindawo ephezulu yokuvezwa, kuhlala kungcono ukukhetha i-SPD enesakhono esikhulu sokutyalwa ngoku ngenxa yokuba utyando kule ndawo lukhulu. Ke ndingakhetha i-ka SPD encinci kwindawo evezwe phezulu. Ngokobuchwephesha, unako. Kodwa ingxaki kukuba i-kA SPD encinci iya kufika esiphelweni sobomi kwaye emva koko kufuneka uthenge kwaye uphinde ufake entsha. Iindleko zokuzilungisa zinokuba phezulu kuneSPD ngokwayo.

Ngoko ke kuzisa esinye isizathu sokusebenzisa i-kA SPD enkulu. I-KA SPD enkulu inobomi obude kwaye ngoko yonga ixesha kunye neendleko zokuyigcina. Umzekelo, ezinye zezikhululo ze-telecom zibekwe kwindawo ekude okanye nakwiincopho zeentaba. I-SPD ekhusela indawo enjalo kufuneka ibenobomi obude kakhulu, ibe ngcono ukuba ingabikho kulondolozo lobomi bonke.

isishwankathelo

Kweli nqaku, sixoxa ngomcimbi wokunyuka kwamandla ngoku xa ukhetha i-SPD. Umthamo omkhulu wangoku we-SPD awunikezeli umlinganiselo wokukhusela umbane ongcono (VPR) kwaye ngamanye amaxesha akufuneki xa uthatha iindleko ezongezelelweyo.

Nangona kunjalo ukuba ii-asethi zakho zibekwe kwindawo ephezulu yokuvezwa okanye umsebenzi wogcino unzima okanye ubiza imali eninzi ukuwenza, ngoko ke i-KA ephezulu ye-SPD iyanqweneleka.