Kodi Mungakulitse Bwanji Zida Zoteteza?
Momwe Mungakulitsire Bwino Zipangizo Zoteteza Kwambiri?
Ndaphika rack ya $20,000 PLC chifukwa sindinasankhe bwino SPD.
Ndimayesa kukula kwa SPD iliyonse pogwirizanitsa Uc yake ndi voltage ya system, Imax yake ndi surge yoipa kwambiri, ndipo imafika pamlingo wa zida; kenako ndimayesa manambala atatu patebulo limodzi.
Pitirizani kuwerenga ndipo ndikuonetsani tebulo kuti musabwerezenso cholakwa changa.
Chifukwa Choyenera SPD Kodi kukula kwake ndi kofunikira?
Ndinataya tsiku lonse lopanga pamene 40 kA SPD inaphulika mu mphepo yamkuntho ya 100 kA.
Ngati SPD ndi yaying'ono kwambiri imayaka; ngati ndi yayikulu kwambiri mumalipira mopitirira muyeso; kukula koyenera kumasunga mzerewo ndipo wowerengera ndalama amakhala bata.
Mtengo Weniweni wa SPD Zosakwana Kukula
Ma SPD osakula bwino samangolephera; amalephera mwamphamvu.
Ndinaona imodzi ikuphulika ndikutumiza pulasitiki yosungunuka pa basi.
Chomeracho chinaima kwa maola 14 pamene tinkasinthana gulu lonse.
Bilu yeniyeni inali $18,000 mu zotuluka zomwe zinatayika, osati $200 SPD.
Mtengo Wobisika wa SPD Zokulirapo
Ma SPD akuluakulu amaoneka otetezeka, koma amawononga ndalama zambiri pasadakhale ndipo amalola mphamvu zambiri kudutsa.
Chipangizo cha 200 kA pa ntchito ya 20 kA chili ndi Up wapamwamba.
Mphamvu yowonjezera ya 200 V ikhoza kupha mphamvu ya 1,200 V PLC.
Mumalipira kawiri: kamodzi pa bokosi lalikulu, kamodzi pa khadi yokazinga.
Momwe Ndimadziwira "Kukula Koyenera" m'Mafunso Atatu
- Kodi ndi chiwopsezo chachikulu chotani chomwe chingafike kuno?
- Kodi mphamvu yamagetsi yomwe katundu wanga angapulumuke ndi yotani?
- Ndi manambala ati a SPD omwe amakhudza zonse ziwiri?
Ngati ndingathe kuyankha zitatuzi, kukula kwake ndi koyenera.
Kufotokozera kwa Ma SPD Ofunika Kwambiri: Uc, Imax, Iimp, ndi Up
Ndinkakonda kusakaniza Imax ndi Iimp; tsiku lina woyang'anira analephera kundithandiza.
Ndimasankha ma volt a Uc ≥ system, Imax ≥ local surge, Iimp ≥ lightning class, ndi Up ≤ 80% ya zida zopirira; ndimalemba manambala anayi mzere umodzi ndisanagule.
Uc - Voltage yomwe SPD Ingakhalepo Kwamuyaya
Uc ndiye nambala ya muzu.
Sankhani pansi kwambiri ndipo SPD idzakhala yochepa.
Sankhani pamwamba kwambiri ndipo chitetezo chimakwera.
Ndimagwiritsa ntchito Table 1 kuti ndigwirizanitse mphamvu yamagetsi ya system ndi Uc yocheperako.
| SystemVoltage(LL) | MinimumUc |
| Gawo logawanika la 120/240 V | 150V |
| 208 Y/120 V | 150V |
| 240 V delta | 255 V |
| 380 Y/220 V | 255 V |
| 480 Y/277 V | 320V |
Imax - Kuwonjezeka Kwakukulu Kwambiri komwe SPD Ingathe Kutenga Kamodzi
Imax ndi nambala yodziwika bwino.
Ndikuyang'ana mapu a kuchuluka kwa kuwala kwa flash komweko.
Ngati mapu akuwonetsa kuwala kwa 8 pa km², ndimapereka chiŵerengero cha 100 kA.
Ngati mapu akuwonetsa kuwala kwa 4, ndimayesa 60 kA.
Sindimafika pansi pa 40 kA ngakhale m'dera lopanda chiopsezo chachikulu.
Iimp - Sitampu ya Kalasi ya Mphezi
Iimp imayesedwa ndi mafunde a 10/350 µs.
Kalasi Yoyamba imafunika 25 kA pa mtengo uliwonse.
Kalasi yachiwiri imafunika 12.5 kA.
Ngati ntchitoyo ili ndi ndodo ya mphezi, ndimawonjezera Kalasi I pa mita.
Mmwamba - Voltage Yotsala ya Katundu
PLC yanga ikuwona pamwamba.
Ndimatenga ndalama zochepa kwambiri zomwe bajeti imalola, koma ndimasunga zosakwana 80% ya mphamvu ya chipangizocho.
2,000 V PLC imapeza SPD yokhala ndi Up ≤ 1,600 V.
Ngati chingwecho ndi chachitali, ndimachisiya kufika pa 1,200 V chifukwa wayayo imawonjezera 200 V yokha.
Ndondomeko Yoyendetsera Bwino Chipangizo Chanu Choteteza Kuthamanga
Ndimayesa SPD iliyonse pa pepala limodzi la A4.
Ndimadzaza mabokosi asanu: ma volt a dongosolo, mulingo wa flash, kutalika kwa chingwe, kupirira katundu, ndi bajeti; kenako ndimawerenga khodi ya chitsanzo kuchokera mu gawo lomaliza la tebulo langa lofufuzira.
Gawo 1 - Lembani Voltage ya System ndi Configuration
Ndiyamba ndi dzina la chikwangwani chomwe chili pa chodulira chachikulu.
Ndimalemba: 480 Y/277 V, magawo atatu, waya wachinayi.
Zimenezo zimandiuza kuti Uc ≥ 320 V kuchokera pa Table 1.
Gawo 2 - Pezani Kuchuluka kwa Flash
Ndimatsegula mapu aulere a NASA ndikudina pa chomera changa.
Mapuwo akuti kuwala kwa 6 pa km² iliyonse.
Ndikupita ku Table 2.
| Kuchuluka kwa Flash | Kuchuluka kwa Imani pa mode iliyonse | Kalasi |
| 0–2 | 40 kA | II |
| 3–5 | 60 kA | II |
| 6–10 | 100 kA | Ine |
| >10 | 160 AD | Ine |
Ndimasankha 100 kA ndi Class I.
Gawo 3 - Yesani Kutalika kwa Chingwe Kuchokera pa Utumiki mpaka Kukweza
Ndimayenda munjira ndi tepi.
Ngati kuthamanga kuli kotalika kuposa 30 m, ndimawonjezera SPD yachiwiri pa sub-panel.
Zingwe zazitali zimawonjezera 10 V pa mita imodzi ya spike yoyambitsidwa.
Gawo 4 - Yang'anani Kupirira kwa Zipangizo
Ndimatsegula buku la PLC.
Limati "mphamvu imapirira 1,500 V".
Ndimachulukitsa ndi 0.8 ndikukhazikitsa ≤ 1,200 V.
Gawo 5 - Sankhani Chitsanzo ndi Mtengo
Ndimatsegula pepala langa lamkati lomwe lawonetsedwa mu Table 3.
| Nambala ya Gawo | Uc | Imax | Imp | Mmwamba | Mtengo1kpcs |
| LKX-480-40 | 320V | 40 kA | 12.5 kA | 1,400V | $18 |
| LKX-480-100 | 320V | 100 kA | 25 kA | 1,100V | $28 |
| LKX-480-160 | 320V | 160 kA | 50 kA | 900V | $42 |
Mzere wapakati umagwirizana ndi bokosi lililonse, kotero ndimasankha LKX-480-100.
Gawo 6 - Ikani Dongosolo ndi Kulemba Tsiku
Ndimawonjezera tsiku lotumizira ku kalendala yanga.
Ndimayikanso alamu yosinthira ya zaka zisanu chifukwa ngakhale ma SPD abwino amakalamba.
Kusankhidwa kwa SPD kwa Ntchito Zosiyanasiyana: Zokhalamo, Zamalonda, ndi Zamakampani
Ndimakhala m'nyumba ya 120 V, ndili ndi shopu ya 480 V, ndipo ndimayendetsa fakitale ya 22 kV.
Ndimasankha 20 kA Mtundu 3 wa firiji yanga, 100 kA Mtundu 1+2 wa shopu yanga, ndi 160 kA Mtundu 1+2+3 wa fakitale yanga; mtundu womwewo, tebulo lomwelo loyang'ana, mzere wosiyana.
Nyumba Zogona - Sungani Zosavuta Komanso Zotsika Mtengo
Nyumba zimawona kukwera kwa 40 kA nthawi zambiri.
Ndimagwiritsa ntchito Mtundu Wachiwiri umodzi pa bolodi ndi Mtundu Wachitatu wina pa TV.
Mtengo wonse uli pansi pa $60.
Ndimagonabe pamene mphepo yamkuntho ikugunda.
Zamalonda - Phimbani Katundu Wosakanikirana
Malo ogulitsira ali ndi magetsi, HVAC, ndi owerengera makadi.
Ndinaika Mtundu 1 pa ntchito, Mtundu 2 pa sub-panel iliyonse, ndi Mtundu 3 pa POS.
Ine ndimakhala ndi banja lomwelo la Up kotero mawonekedwe a mafunde amawonjezeka, osati kumenyana.
Zamalonda - Werengani Ma Loops ndi Ma Motors
Ma mota amaponya mphamvu ya 1,500 V kumbuyo kwa mzere akamazimitsa.
Ndimawonjezera RC snubber pamodzi ndi SPD yokhala ndi margin ya 200 V pamwamba.
Ndimagwiritsanso ntchito ma DIN-rail units kuti ndizitha kuwasintha pompopompo; nthawi yopuma imawononga ndalama zambiri kuposa gawolo.
Malo Apadera - Oopsa Komanso Achipatala
M'malo ophulika a Zone 2 ndimasankha ma SPD omwe alibe mphezi.
Mu zipatala ndimagwiritsa ntchito zosefera za digiri ya zachipatala zomwe zimakhala ndi kutayikira kwa
Tebulo ndi lomwelo; mawu owonjezera okha ndi omwe amasintha.
Mapeto
Ine kukula kwa ma SPD ndi manambala anayi: Uc, Imax, Iimp, Up.
Tsegulani matebulo, dzazani mabokosi, sankhani mzere, ndipo simudzagulanso bokosi lolakwika.
Nditumizireni dzina lanu la gulu ndipo ndidzakutumizirani gawo loyenera mawa.