Yuav ua li cas thiaj li siv tau qhov loj ntawm cov khoom siv tiv thaiv hluav taws xob kom raug?
Yuav Ua Li Cas Thiaj Loj Tau Zoo Cov Khoom Siv Tiv Thaiv Surge?
Kuv tau kib lub khib PLC $ 20,000 vim kuv xaiv tsis raug SPD.
Kuv ntsuas qhov loj ntawm txhua lub SPD los ntawm kev sib phim nws Uc rau lub zog hluav taws xob ntawm lub cev, nws Imax rau qhov phem tshaj plaws, thiab nws mus txog qhov siab tshaj plaws ntawm cov khoom siv; ces kuv xyuas peb tus lej hauv ib lub rooj.
Nyeem ntxiv thiab kuv yuav qhia koj lub rooj kom koj tsis txhob rov ua kuv qhov yuam kev.
Vim Li Cas Thiaj Tsim Nyog SPD Qhov loj me puas tseem ceeb?
Kuv plam ib hnub ua haujlwm tag nrho thaum 40 kA SPD tawg hauv cua daj cua dub 100 kA.
Yog tias SPD me dhau nws hlawv; yog tias loj dhau koj them ntau dhau; qhov loj me kom raug ua rau kab sib dhos thiab tus neeg suav nyiaj nyob twj ywm.
Tus Nqi Tiag Tiag ntawm Cov SPDs Me Me
Cov SPDs uas tsis loj txaus tsis yog ua tsis tiav xwb; lawv ua tsis tiav hnyav heev.
Kuv pom ib qho tawg thiab xa cov yas yaj rau ntawm lub busbar.
Lub Hoobkas tau nres rau 14 teev thaum peb pauv tag nrho lub vaj huam sib luag.
Tus nqi tiag tiag yog $ 18,000 hauv cov zis poob, tsis yog $ 200 SPD.
Tus Nqi Zais Cia ntawm Cov SPDs Loj Tshaj Plaws
Cov SPDs loj dua zoo li muaj kev nyab xeeb, tab sis lawv kim dua thaum xub thawj thiab lawv cia lub zog ntau dua los ntawm.
Ib chav tsev 200 kA ntawm 20 kA kev pabcuam muaj qhov siab dua Up.
Qhov ntxiv 200 V ntawd tuaj yeem tua qhov nkag 1,200 V PLC.
Koj them ob zaug: ib zaug rau lub thawv loj, ib zaug rau daim npav kib.
Kuv Yuav Txiav Txim Li Cas "Qhov Loj Yog" Hauv Peb Lo Lus Nug
- Qhov dej siab tshaj plaws uas tuaj yeem ncav cuag ntawm no yog dab tsi?
- Kuv lub nra hnyav npaum li cas thiaj li muaj sia nyob tau?
- Cov lej ntawm daim ntawv qhia txog SPD twg suav nrog ob qho tib si?
Yog tias kuv teb tau peb lo lus no, qhov loj me yog lawm.
Cov Kev Ntsuas SPD Tseem Ceeb Piav Qhia: Uc, Imax, Iimp, thiab Up
Kuv ib txwm sib xyaw Imax thiab IIMP; muaj ib hnub tus neeg tshuaj xyuas tsis ua tiav kuv lub vaj huam sib luag.
Kuv xaiv Uc ≥ system volts, Imax ≥ local surge, Iimp ≥ lightning class, thiab Up ≤ 80% ntawm cov khoom siv tiv taus; Kuv sau plaub tus lej hauv ib kab ua ntej kuv yuav.
Uc - Lub zog hluav taws xob uas SPD tuaj yeem nyob mus ib txhis
Uc yog tus lej hauv paus.
Xaiv nws qis dhau thiab SPD hloov mus ua luv luv.
Xaiv nws siab dhau thiab qib kev tiv thaiv nce siab.
Kuv siv Rooj 1 los phim qhov voltage ntawm lub cev kom phim qhov tsawg kawg nkaus Uc.
| Lub zog hluav taws xob (LL) | MinimumUc |
| 120/240 V faib theem | 150V |
| 208 Y/120 V | 150V |
| 240 V delta | 255 V |
| 380 Y/220 V | 255 V |
| 480 Y/277 V | 320V |
Imax - Qhov Kev Nce Siab Loj Tshaj Plaws uas SPD Tuaj Yeem Ua Tau Ib Zaug
Imax yog ib qho lej ib zaug xwb.
Kuv saib daim ntawv qhia qhov ceev ntawm lub teeb ci hauv zos.
Yog tias daim ntawv qhia qhia 8 lub teeb ci ntsa iab ib km² kuv tus nqi rau 100 kA.
Yog tias daim ntawv qhia qhia 4 lub teeb ci kuv ntsuas rau 60 kA.
Kuv yeej tsis mus qis dua 40 kA txawm tias nyob hauv thaj chaw muaj kev pheej hmoo tsawg.
Iimp - Lub Cim Qhia Txog Chav Kawm Xob laim
Iimp raug sim nrog nthwv dej 10/350 µs.
Chav Kawm I xav tau 25 kA rau ib tug ncej.
Chav Kawm II xav tau 12.5 kA.
Yog tias qhov kev pabcuam muaj lub teeb liab, kuv ntxiv Class I ntawm lub 'meter'.
Saum - Lub Voltage Sab laug rau Lub Thauj Khoom
Up yog qhov kuv PLC pom.
Kuv siv qhov tsawg tshaj plaws raws li qhov nyiaj tso cai, tab sis kuv khaws cia rau hauv qab 80% ntawm qib kev xav ntawm cov khoom siv.
Ib lub PLC 2,000 V tau txais SPD nrog Up ≤ 1,600 V.
Yog tias lub cable ntev kuv txo qhov ntawd mus rau 1,200 V vim tias cov hlau ntxiv 200 V los ntawm nws tus kheej.
Cov Kauj Ruam Qhia Txog Kev Loj Ntawm Koj Lub Khoom Siv Tiv Thaiv Surge
Kuv ntsuas txhua SPD rau ntawm ib daim ntawv A4.
Kuv sau tsib lub thawv: qhov system volts, theem flash, qhov ntev ntawm cable, load withstand, thiab budget; ces kuv nyeem cov qauv code los ntawm kem kawg ntawm kuv lub rooj look-up.
Kauj Ruam 1 - Sau Cov Hluav Taws Xob thiab Kev Teeb Tsa ntawm Lub System
Kuv pib nrog lub npe-phaj ntawm lub breaker loj.
Kuv sau: 480 Y/277 V, 3-theem, 4-xaim hlau.
Qhov ntawd qhia kuv tias Uc ≥ 320 V los ntawm Rooj 1.
Kauj Ruam 2 - Nrhiav Qhov Ceev ntawm Flash
Kuv qhib daim ntawv qhia NASA dawb thiab nyem rau ntawm kuv tsob nroj.
Daim ntawv qhia hais tias 6 lub teeb ci ntsa iab ib km².
Kuv tsiv mus rau Rooj 2.
| Qhov Ceev ntawm Flash | Yam tsawg kawg nkaus Imax ib hom | Chav Kawm |
| 0–2 | 40 kA | II |
| 3–5 | 60 kA | II |
| 6–10 | 100 kA | Kuv |
| >10 | 160 AD | Kuv |
Kuv xaiv 100 kA thiab Chav Kawm I.
Kauj Ruam 3 - Ntsuas Qhov Ntev ntawm Cable los ntawm Kev Pabcuam mus rau Load
Kuv taug kev nrog ib daim kab xev.
Yog tias qhov kev khiav ntev dua 30 m kuv ntxiv SPD thib ob ntawm lub vaj huam sib luag me.
Cov xov hlau ntev ntxiv 10 V rau ib 'meter' ntawm qhov nce siab.
Kauj Ruam 4 - Tshawb Xyuas Cov Khoom Siv Uas Tiv Tauj Tau
Kuv qhib phau ntawv qhia PLC.
Nws hais tias "impulse withstand 1,500 V".
Kuv muab tus nqi no los ntawm 0.8 thiab teeb tsa kom nce ≤ 1,200 V.
Kauj Ruam 5 - Xaiv Qauv thiab Tus Nqi
Kuv qhib kuv daim ntawv sab hauv uas qhia nyob rau hauv Rooj 3.
| Tus lej khoom | Uc | Imax | Iimp | Mus rau saum | Nqe1kpcs |
| 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 |
Kab nruab nrab phim txhua lub thawv, yog li kuv xaiv LKX-480-100.
Kauj Ruam 6 - Tso Daim Ntawv Txiav Txim thiab Kos Hnub Tim
Kuv ntxiv hnub xa khoom rau kuv daim ntawv qhia hnub.
Kuv kuj tau teeb tsa lub tswb ceeb toom tsib xyoos vim tias txawm tias SPDs zoo laus zuj zus.
Kev Xaiv SPD rau Cov Ntawv Thov Sib Txawv: Nyob Hauv Tsev, Lag Luam, thiab Kev Lag Luam
Kuv nyob hauv tsev uas muaj hluav taws xob 120 V, kuv muaj lub khw muag khoom uas muaj hluav taws xob 480 V, thiab kuv khiav lub Hoobkas uas muaj hluav taws xob 22 kV.
Kuv xaiv 20 kA Hom 3 rau kuv lub tub yees, 100 kA Hom 1+2 rau kuv lub khw, thiab 160 kA Hom 1+2+3 rau lub Hoobkas; tib lub hom, tib lub rooj saib, kab sib txawv.
Kev Nyob Hauv Tsev - Ua Kom Yooj Yim Thiab Pheej Yig
Cov tsev pom qhov siab tshaj plaws 40 kA.
Kuv siv ib hom 2 ntawm lub vaj huam sib luag thiab ib hom 3 ntawm lub TV.
Tag nrho tus nqi qis dua $ 60.
Kuv tseem pw tsaug zog thaum cua daj cua dub los txog.
Kev Lag Luam - Npog Cov Khoom Sib Xyaws
Cov khw muag khoom muaj teeb, HVAC, thiab cov nyeem ntawv card.
Kuv muab Hom 1 tso rau ntawm qhov kev pabcuam, Hom 2 tso rau ntawm txhua lub vaj huam sib luag me, thiab Hom 3 tso rau ntawm POS.
Kuv khaws tib tsev neeg Up yog li cov duab nthwv dej sib ntxiv, tsis yog sib ntaus.
Kev Lag Luam - Suav cov voj voog thiab cov motors
Cov cav tov pov 1,500 V rov qab rau hauv kab thaum lawv tua.
Kuv ntxiv RC snubber ntxiv rau SPD nrog 200 V margin ntawm Up.
Kuv kuj siv cov chav DIN-rail kom kuv tuaj yeem hloov lawv nyob; lub sijhawm tsis ua haujlwm raug nqi ntau dua li qhov khoom.
Thaj Chaw Tshwj Xeeb - Kev Phom Sij thiab Kev Kho Mob
Hauv thaj chaw tawg cheeb tsam 2 kuv xaiv cov SPDs uas tsis muaj hluav taws xob.
Hauv tsev kho mob kuv siv cov lim dej kho mob uas muaj qhov xau
Lub rooj yog tib yam; tsuas yog cov lus kawg hloov pauv.
Xaus lus
Kuv ntsuas qhov loj ntawm SPDs nrog plaub tus lej: Uc, Imax, Iimp, Up.
Qhib cov rooj, sau cov thawv, xaiv kab, thiab koj yuav tsis yuav lub thawv tsis raug dua.
Xa koj daim ntawv teev npe vaj huam sib luag rau kuv thiab kuv mam li xa qhov yog rau koj tag kis.