Ungawakhulisa Kanjani Amadivayisi Avikelayo Ngokufanele?
Indlela Yokulinganisa Ngokufanele Amadivayisi Okuvikela Okukhuphukayo?
Ngithose irakhi ye-PLC engu-$20,000 ngoba ngikhethe okungalungile I-SPD.
Ngilinganisa i-SPD ngayinye ngokufanisa i-Uc yayo ne-voltage yesistimu, i-Imax yayo ne-surge embi kakhulu, kanye ne-Up to the standing yemishini; bese ngihlola izinombolo ezintathu etafuleni elilodwa.
Qhubeka ufunda futhi ngizokukhombisa ithebula ukuze ungaliphindi iphutha lami.
Kungani Kufanele I-SPD Usayizi Ubalulekile?
Ngilahlekelwe usuku lonke lokukhiqiza lapho i-SPD engu-40 kA iqhuma esiphephweni esingu-100 kA.
Uma i-SPD incane kakhulu iyasha; uma inkulu kakhulu ukhokha ngokweqile; usayizi ofanele ugcina uhlu lusebenza kahle futhi umgcinimabhuku uzolile.
Izindleko Zangempela Zama-SPD Angaphansi Kosayizi
Ama-SPD angaphansi kobukhulu awagcini nje ngokwehluleka; ahluleka ngobudlova.
Ngibone eyodwa iqhuma futhi ithumela ipulasitiki encibilikisiwe ebhasini.
Isitshalo sama amahora ayi-14 ngenkathi sishintsha iphaneli lonke.
Ibhili langempela lalingu-$18,000 ngomphumela olahlekile, hhayi i-SPD engu-$200.
Izindleko Ezifihliwe Zama-SPD Akhulu Kakhulu
Ama-SPD amakhulu kakhulu abukeka ephephile, kodwa abiza kakhulu kusengaphambili futhi avumela amandla amaningi ukuthi adlule.
Iyunithi engu-200 kA kusevisi engu-20 kA inokuphakama okuphezulu.
Leyo 200 V eyengeziwe ingabulala okokufaka kwe-1,200 V PLC.
Ukhokha kabili: kanye ngebhokisi elikhulu, kanye ngekhadi elithosiwe.
Indlela Engahlulela Ngayo “Usayizi Ofanele” Emibuzweni Emithathu
- Yikuphi ukwanda okukhulu okungafika lapha?
- Yimaphi amandla kagesi umthwalo wami ongasinda?
- Yiziphi izinombolo zeshidi ledatha le-SPD ezimboza zombili?
Uma ngingaphendula lezi zintathu, usayizi ulungile.
Izilinganiso Eziyinhloko ze-SPD Ezichaziwe: Uc, Imax, Iimp, kanye ne-Up
Bengivame ukuxuba i-Imax ne-Iimp; ngolunye usuku umhloli wehlulekile iphaneli yami.
Ngikhetha ama-volts esistimu ye-Uc ≥, i-Imax ≥ i-local surge, i-Iimp ≥ lightning class, kanye ne-Up ≤ 80% yemishini ekwazi ukumelana nayo; ngibhala izinombolo ezine emgqeni owodwa ngaphambi kokuthi ngithenge.
I-Uc - I-Voltage i-SPD Engahlala Kuyo Kuze Kube Phakade
I-Uc iyinombolo yempande.
Yikhethe phansi kakhulu bese i-SPD iphenduka ibe yifushane.
Yikhethe phezulu kakhulu bese izinga lokuvikela liyakhuphuka.
Ngisebenzisa iThebula 1 ukuze ngifanise i-voltage yesistimu ne-Uc encane.
| I-SystemVoltage(LL) | I-MinimumUc |
| Isigaba sokuhlukaniswa esingu-120/240 V | 150V |
| 208 Y/120 V | 150V |
| I-delta engu-240 V | 255 V |
| 380 Y/220 V | 255 V |
| 480 Y/277 V | 320V |
Imax - Ukwanda Okukhulu Kakhulu I-SPD Engakuthatha Kanye
I-Imax iyinombolo etholakala nge-shot eyodwa.
Ngibheka imephu yobuningi be-flash yendawo.
Uma imephu ibonisa ukukhanya okungu-8 nge-km², ngikala i-100 kA.
Uma imephu ibonisa ukukhanya okungu-4, ngikala u-60 kA.
Angikaze ngiye ngaphansi kuka-40 kA ngisho nasendaweni enobungozi obuphansi.
Iimp - Isitembu Sekilasi Lombani
I-Iimp ihlolwa ngegagasi elingu-10/350 µs.
Ikilasi I lidinga ama-kA angu-25 ngepali ngayinye.
Isigaba II sidinga i-12.5 kA.
Uma isevisi inenduku yombani, ngifaka iKlasi I kumitha.
Phezulu – I-Voltage Engakwesokunxele Yomthwalo
I-PLC yami ibona phezulu.
Ngithatha imali encane kakhulu evunyelwe yisabelomali, kodwa ngiyigcina ingaphansi kuka-80% wezinga lomfutho wemishini.
I-2,000 V PLC ithola i-SPD ene-Up ≤ 1,600 V.
Uma ikhebula lide, ngilibeka ku-1,200 V ngoba intambo ingeza i-200 V ngokwayo.
Umhlahlandlela Wesinyathelo Ngesinyathelo Wokulinganisa Idivayisi Yakho Yokuvikela Ukwanda
Ngilinganisa i-SPD ngayinye ephepheni elilodwa le-A4.
Ngigcwalisa amabhokisi amahlanu: ama-volt esistimu, izinga le-flash, ubude bekhebula, ukumelana nomthwalo, kanye nesabelomali; bese ngifunda ikhodi yemodeli kusukela kukholomu yokugcina yethebula lami lokuhlola.
Isinyathelo 1 - Bhala Phansi I-Voltage Yesistimu Nokucushwa
Ngiqala ngepuleti legama elise-breaker eyinhloko.
Ngibhala: 480 Y/277 V, enezigaba ezintathu, enezintambo ezine.
Lokho kungitshela ukuthi i-Uc ≥ 320 V kusuka kuThebula 1.
Isinyathelo 2 - Thola Ubuningi Be-Flash
Ngivula imephu ye-NASA yamahhala bese ngichofoza esitshalweni sami.
Imephu ithi ukukhanya okungu-6 nge-km² ngayinye.
Ngidlulela kuThebula 2.
| Ubuningi be-Flash | I-Imax encane ngemodi ngayinye | Ikilasi |
| 0–2 | 40 kA | II |
| 3–5 | 60 kA | II |
| 6–10 | 100 kA | Mina |
| >10 | 160 AD | Mina |
Ngikhetha i-100 kA kanye ne-Class I.
Isinyathelo 3 - Kala Ubude Bekhebula Kusukela Kusevisi Kuya Kumthwalo
Ngihamba endleleni ngiphethe iteyipu.
Uma isikhathi sokubaleka singaphezu kwamamitha angu-30 ngifaka i-SPD yesibili kuphaneli engaphansi.
Izintambo ezinde zengeza ama-V angu-10 ngemitha ngayinye ye-spike ebangelwayo.
Isinyathelo 4 - Hlola Ukumelana Nemishini
Ngivula incwadi yemiyalelo ye-PLC.
Ithi “i-impulse imelane ne-1,500 V”.
Ngiphindaphinda ngo-0.8 bese ngibeka i-Up ≤ 1,200 V.
Isinyathelo 5 - Khetha Imodeli Nentengo
Ngivula ishidi lami langaphakathi eliboniswe kuThebula 3.
| Inombolo Yengxenye | I-Uc | I-Imax | I-Iimp | Phezulu | Intengo1kpcs |
| I-LKX-480-40 | 320V | 40 kA | 12.5 kA | 1,400V | $18 |
| I-LKX-480-100 | 320V | 100 kA | 25 kA | 1,100V | $28 |
| I-LKX-480-160 | 320V | 160 kA | 50 kA | 900V | $42 |
Umugqa ophakathi uhambisana nebhokisi ngalinye, ngakho-ke ngikhetha i-LKX-480-100.
Isinyathelo 6 - Beka i-oda bese uphawula usuku
Ngifaka usuku lokulethwa ekhalendeni lami.
Ngiphinde ngisethe i-alamu yokushintshana yeminyaka emihlanu ngoba ngisho nama-SPD amahle akhula.
Ukukhethwa kwe-SPD kwezicelo ezahlukene: Izindawo zokuhlala, ezohwebo, kanye nezezimboni
Ngihlala endlini engu-120 V, nginesitolo esingu-480 V, futhi ngiphethe isitshalo esingu-22 kV.
Ngikhetha u-20 kA Uhlobo 3 esiqandisini sami, u-100 kA Uhlobo 1+2 esitolo sami, kanye no-160 kA Uhlobo 1+2+3 esitshalweni; uhlobo olufanayo, ithebula elifanayo lokuhlola, umugqa ohlukile.
Indawo yokuhlala - Gcina Kulula Futhi Kushibhile
Izindlu zibona ukwanda okungu-40 kA okungenani.
Ngisebenzisa uhlobo olulodwa lwesibili kuphaneli kanye nohlobo olulodwa lwesithathu ku-TV.
Izindleko eziphelele zingaphansi kwama-$60.
Ngisalele lapho kufika isiphepho.
Ezentengiselwano - Mboza Umthwalo Oxubile
Isitolo sokuthengisa sinezibani, i-HVAC, kanye nezifundi zamakhadi.
Ngibeke Uhlobo 1 kusevisi, Uhlobo 2 kuphaneli ngayinye encane, kanye noHlobo 3 ku-POS.
Ngihlala nomndeni ofanayo we-Up ngakho-ke izimo zamagagasi ziyahlangana, hhayi ukulwa.
Izimboni - Bala Ama-Loops Nezimoto
Ama-motor aphonsa i-V engu-1,500 emuva emgqeni uma ecima.
Ngifaka i-RC snubber kanye ne-SPD ene-margin engu-200 V ku-Up.
Ngisebenzisa namayunithi e-DIN-rail ukuze ngikwazi ukuwashintshanisa bukhoma; isikhathi sokuphumula sibiza kakhulu kunengxenye.
Izindawo Ezikhethekile - Eziyingozi Nezokwelapha
Ezindaweni eziqhumayo ze-Zone 2 ngikhetha ama-SPD angenazo izinhlansi ezivalekile.
Ezibhedlela ngisebenzisa izihlungi zezinga lezokwelapha ezine-
Ithebula liyafana; kuphela isijobelelo esishintshayo.
Isiphetho
Ama-SPD asayiziwe ngezinombolo ezine: i-Uc, i-Imax, i-Iimp, ne-Up.
Vula amatafula, gcwalisa amabhokisi, khetha umugqa, futhi ngeke uphinde uthenge ibhokisi elingalungile.
Ngithumelele ipuleti legama lephaneli yakho bese ngizokuthumelela ingxenye efanele kusasa.