Tshawb Nrhiav Cov Ntsiab Cai ntawm Surge Protectors?
Kuv tseem hnov tsw ntawm cov kua roj vanish hlawv los ntawm kev sim uas peb tau ua xyoo tas los - ib qho 6 kV strike thiab lub rooj tsavxwm dummy tig dub hauv ib nrab vib nas this.
Ib lub tshuab tiv thaiv hluav taws xob ua haujlwm los ntawm kev rub lub zog ntxiv thiab thawb nws mus rau hauv av, tom qab ntawd nws clamps lub voltage qis dua qib uas tuaj yeem ua rau koj cov tshuab raug mob. Kuv tsim cov units no txhua hnub hauv Wenzhou thiab sim lawv rau IEC 61643-11.
Yog koj paub ua li cas thiaj ua tau li ntawd, koj tuaj yeem xaiv qhov yog thiab tsis txhob them rau cov specs uas koj yeej tsis siv. Nyeem ntxiv thiab kuv yuav qhia koj txog lub cev ntawm lub cuab yeej.
Lub hom phiaj tseem ceeb: kev hloov pauv zog thiab kev clamping voltage?
Kuv tau pom ib zaug uas muaj 40 kA surge tsis ua haujlwm ib qho micro-second vim tias MOV nias raws sijhawm—lub disk me me ntawd txuag tau $12,000 inverter.
Ob lub hom phiaj tseem ceeb yog: (1) txav lub zog surge mus rau hauv av sai sai, thiab (2) khaws lub voltage uas ncav cuag lub load kom nyob rau hauv qab qhov kev nyab xeeb sau rau ntawm daim ntawv qhia.
Lub Zog Txav Mus Los Hauv Lub Thawv Li Cas
Muaj ib qho hluav taws xob nce siab tuaj txog ntawm txoj kab. Qhov MOV impedance poob qis ntawm mega-ohms mus rau ohms hauv nano-seconds. Tam sim no siv txoj kev yooj yim los ntawm lub cuab yeej, tom qab ntawd khiav mus rau hauv cov xov hlau ntsuab-daj. Cov xov hlau kub dua, nws qhov impedance qis dua, yog li peb siv 6 mm² Cu thiab khaws cov hlau lead hauv qab 50 cm. Txhua qhov ntev ntxiv ntxiv 1 µH ntawm inductance thiab qhov ntawd ntxiv 1 kV rau qhov hluav taws xob cia-dhau. Cov neeg siv khoom tsis nco qab qhov no thiab liam qhov khoom thaum lub rooj tsavxwm tseem tuag.
Qhov Clamping Voltage vs Qhov Cia-Through Voltage
Cov neeg sib xyaw ob tus lej. Qhov hluav taws xob clamping yog qhov MOV pom. Qhov hluav taws xob cia-dhau yog qhov thauj khoom pom tom qab cable poob. Kuv ib txwm teev ob qho tib si ntawm kuv daim ntawv xeem. Ib qho uas clamps ntawm 700 V tseem tuaj yeem cia 1,200 V ncav cuag VFD yog tias lub ntiaj teb tus Tsov tus tw yog 80 cm. Txiav tus Tsov tus tw, txiav qhov mob.
Cov Ntaub Ntawv Tseeb Los Ntawm Peb Lub Chaw Kuaj Mob
| Qib Siab | Qhov Loj ntawm MOV | Cov hlau lead hauv ntiaj teb | Tso Cai | Qhov tshwm sim |
| 20 kA 8/20 µs | 32 hli disc | 25 cm | 980 V | Dhau |
| 20 kA 8/20 µs | 32 hli disc | 80 cm | 1.450V | UA TSIS TAU |
| 40 kA 8/20 µs | 40 hli disc | 25 cm | 1.050V | Dhau |
Lub rooj qhia tias qhov ntev ntawm txoj hlua khi ntau dua qhov loj ntawm MOV. Kuv qhia txhua tus neeg yuav khoom: siv ib duas ntxiv rau cov neeg xa khoom luv ua ntej koj siv tsib duas rau qhov loj dua.
Vim Li Cas Peb Thiaj Ntxiv Ib Lub Raj Mis Tso Pa Hauv Cov Qauv Sib Xyaws
Ib lub MOV yuav puas tsuaj tom qab muaj hluav taws xob ntau heev. Ib lub GDT tuaj yeem thaij tau ntau daim duab tab sis qeeb heev. Peb muab lawv tso ua ke. Lub MOV pib ua ntej thiab clamps rau thawj 100 ns. Tom qab ntawd GDT tua hluav taws thiab siv cov hluav taws xob ntau. Lub MOV so thiab nyob ntev dua. Hybrid tam sim no yog peb cov khoom muag zoo tshaj plaws rau cov chaw ua liaj ua teb hnub ci hauv German vim tias cov neeg ua haujlwm hauv qhov chaw xav tau lub neej 20 xyoo, tsis yog tsib xyoos.
Cov khoom tseem ceeb thiab cov txheej txheem tiv thaiv hierarchical?
Kuv qhib ib qho ntawm peb cov chav hom 1 + 2 thiab kuv pom MOVs, GDTs, fuses, thiab lub qhov hloov cua sov me me uas nyem zoo li lub lauj kaub thaum nws nkees.
Cov khoom tseem ceeb yog: (A) varistors lossis GDTs uas noj hluav taws xob, (B) thermal disconnects uas tiv thaiv hluav taws, thiab (C) backup fuses uas tshem tawm cov luv luv circuits. Peb muab cov no tso ua peb txheej kom phim cov xov hlau hauv ib lub Hoobkas.
Txheej Ib: Hom 1 ntawm Lub Qhov Rooj Pabcuam
Qhov no pom tau xob laim ncaj qha. Peb siv lub raj xa hluav taws xob 25 kA 10/350 µs ntxiv rau lub thaiv MOV 50 kA. Lub hom phiaj yog kom txo qhov hluav taws xob ntawm 1,000 kV mus rau qis dua 4 kV ua ntej nws nkag mus rau hauv lub switchboard. Peb teeb tsa nws rau ntawm 35 hli DIN rail thiab khi nws nrog 16 mm² Cu rau lub ntiaj teb tseem ceeb. Ib lub qhov ntsia hlau hauv qhov chaw tsis raug ntxiv 2 µH thiab 2 kV ntxiv. Kuv kuaj xyuas daim duab ob zaug; tus neeg yuav khoom txuag tau lub transformer kib.
Txheej Ob: Hom 2 ntawm Sub-Panels
Cov txheej no tiv thaiv kev nce siab los ntawm kev tawm tsam ze lossis kev hloov pauv ntawm lub cev muaj zog loj. Peb xaiv 40 kA 8/20 µs MOVs nrog kev txiav tawm thermal. Cov khoom ntsaws rau hauv kom tus neeg siv tuaj yeem hloov nws yam tsis tua lub zog. Peb ntxiv lub LED ntsuab uas mus tua thaum cov khoom tuag. Ib tus thawj tswj hwm qhov chaw hauv Milan tau hais rau kuv tias nws tuaj yeem kuaj xyuas 50 lub vaj huam sib luag hauv kaum feeb tsuas yog taug kev hauv txoj kev thiab suav cov dots ntsuab.
Txheej Peb: Hom 3 ntawm Qhov Thauj Khoom
Cov tsav tsheb, PLCs thiab PCs xav tau tus neeg saib xyuas hauv zos. Peb siv 10 kA 8/20 µs units nrog let-through hauv qab 900 V. Qhov khoom haum rau hauv lub thawv phab ntsa lossis sab hauv lub qhov (socket strip). Cable los ntawm Hom 2 mus rau qhov load yuav tsum nyob hauv qab 10 m. Yog tias qhov khiav ntev dua, peb ntxiv lwm Hom 3. Kuv ib zaug txuag tau $ 4,000 servo los ntawm kev ntxiv $ 9 socket SPD vim tias lub vaj huam sib luag nyob deb 30 m.
Yuav ua li cas cov Layers tham nrog ib leeg
Lub zog zoo li dej. Yog tias lub pas dej thawj puv lawm, lub pas dej thib ob yuav tsum npaj txhij. Peb teeb tsa cov theem hluav taws xob ua cov kauj ruam: Hom 1 clamps ntawm 1.8 kV, Hom 2 ntawm 1.4 kV, Hom 3 ntawm 0.9 kV. Txheej qis dua yeej tsis pib ua ntej txheej sab saud, yog li txhua qhov sib koom ua ke. Peb sim cov saw hlau tag nrho hauv peb lub chaw kuaj mob nrog peb chav nyob hauv series thiab 100 kA strike. Qhov tso tawm ntawm qhov kawg yog 720 V, muaj kev nyab xeeb rau txhua qhov tsav 230 V.
Daim Ntawv Teev Khoom Peb Siv Txhua Hnub
| Ib feem | Lub luag haujlwm | Cov Lus Qhia Tshwj Xeeb | Lub Neej Lub Voj Voog |
| 40 hli MOV | Clamp | 40 kA 8/20 µs | 20 qhov kev ntaus loj |
| Kev hloov pauv thermal | Nres hluav taws | 120 °C | Ib zaug xwb |
| 6 A gG fuse | Luv luv kom meej | 50 kA tawg | Ib zaug xwb |
| GDT raj | Kev thaub qab | 600 V hluav taws xob | 100 qhov kev ntaus |
| LED + resistor | Xwm txheej | 2 mA ntws tawm | 10 xyoo |
Kev koom tes thiab kev tiv thaiv kev nyab xeeb?
Kuv tseem nco qab hnub uas lub tshuab cua sov tawg thiab lub chij liab hais kom tus kws kho tshuab hloov lub tshuab—tsis txhob ua yeeb yam, tsis txhob muaj hluav taws, tsuas yog so tsib feeb xwb.
Ib lub SPD yuav tsum ua haujlwm nrog cov breakers, earthing thiab cable routing. Peb ntxiv thermal fuses, micro-switches thiab remote signals kom pab neeg hauv qhov chaw paub thaum twg qhov khoom ntawd puas lawm thiab kev thaub qab zoo yuav los ua haujlwm.
Vim li cas SPD thiaj xav tau Breaker ua phooj ywg
Ib lub MOV tuaj yeem luv luv thaum nws tuag. Lub fuse thaub qab yuav tsum tshem tawm qhov txhaum ua ntej lub vaj huam sib luag hlawv. Peb phim qhov nkhaus fuse rau qhov tam sim no ntawm MOV. Ib lub MOV 40 kA tsis ua haujlwm ntawm 1 kA luv luv. Peb xaiv lub fuse 6 A gG uas tshem tawm hauv 0.1 s ntawm 1 kA. Lub fuse yeej tsis tshuab ntawm qhov tam sim no ib txwm vim tias qhov ntawd kav ntev li ntawm micro-seconds. Kev suav lej yog qhov nruj, tab sis nws ua haujlwm. Kuv muab daim ntawv qhia fuse rau cov neeg yuav khoom kom lawv tus kws hluav taws xob tsis txhob kwv yees.
Kev Tshaj Tawm Chaw Nyob Deb Rau Cov Chaw Loj
Muaj ib tug neeg siv khoom khiav lub cub tawg iav 24/7. Nws tsis tuaj yeem taug kev hauv lub Hoobkas txhua lub lim tiam. Peb ntxiv ib lub micro-switch hauv SPD uas tig thaum lub thermal disc qhib. Lub switch pub rau 24 V PLC input. Lub teeb liab ntawm HMI hais tias "SPD tuag." Tus neeg teb xov tooj hu rau peb, peb xa ib lub cartridge seem, thiab nws hloov nws thaum hloov pauv tom ntej. Tsis muaj kev nres tsis tau npaj tseg hauv ob xyoos.
Kev sib koom tes nrog RCDs thiab Arc Detectors
Muaj ib txhia engineers ntshai tias qhov xau ntawm SPD yuav ua rau RCD tawg. Peb tswj qhov xau kom qis dua 0.3 mA ntawm 230 V. Lub RCD 30 mA yeej tsis pom nws. Yog tias qhov chaw siv cov arc detectors, peb ntxiv EMI lim rau pem hauv ntej ntawm SPD kom qhov kev clamping siab tsis dag lub detector. Peb tau sim qhov sib xyaw no ntawm TÜV Rheinland thiab dhau.
Cov Cim Qhia Txog Kev Ua Tau Zoo?
Kuv taug qab peb tus lej ntawm txhua qhov khoom xa tuaj: qhov hluav taws xob tso tawm, qhov feem pua ntawm kev ua tsis tiav rau 1,000 daim, thiab lub sijhawm hloov pauv ntawm qhov chaw. Yog tias muaj qhov tsis sib xws, kuv nres kab.
Cov KPIs saum toj kawg nkaus yog: (1) qib kev tiv thaiv hluav taws xob (Saum toj) ntsuas hauv chav kuaj, (2) suav lub neej ntawm lub zog hluav taws xob ua ntej hnav tawm, thiab (3) lub sijhawm nruab nrab los hloov (MTTR) ntawm cov kab ke ua haujlwm. Kuv sau cov no rau txhua pawg peb muag.
Vim Li Cas Kev Tso Cai Yog Vaj Ntxwv
Yog tias qhov hluav taws xob poob qis 200 V, lub zog tsav yuav ua rau lub zog tsav siv tau ntev dua ob npaug. Peb sim txhua lub MOV disc ntawm 100% tam sim no thiab sau cov hluav taws xob. Cov discs uas nyeem tau siab mus rau kab hluav taws xob hnub ci uas qhov clamping tsis tseem ceeb. Cov discs uas nyeem tau qis mus rau kab German PLC. Hom no ntxiv ib teev rau kev tsim khoom tab sis txiav cov teeb meem hauv thaj teb los ntawm 40%. Kuv them ib teev, kuv txuag tau lub sijhawm hmo ntuj.
Kev Ntsuas Tus lej ntawm Lub Neej Peb Ua
Peb ntaus tib qho nrog 20 kA txhua tsib feeb kom txog thaum lub qhov hloov cua sov tawm. Tus tuav cov ntaub ntawv kav ntev li 27 lub koob yees duab. Peb tshaj tawm cov kab nkhaus rau ntawm daim ntawv qhia cov ntaub ntawv. Cov neeg yuav khoom pom tias qhov khoom tseem ua haujlwm tom qab kaum xyoo ntawm kev nce siab ib txwm muaj. Daim duab ntawd kaw ntau qhov kev cog lus dua li kuv qhov kev txiav tus nqi zoo tshaj plaws.
Xaus lus
Kev hloov pauv zog, kev clamping, txheej, thaub qab thiab KPIs kom meej - qhov ntawd yog tag nrho zaj dab neeg. Xaiv ib lub SPD uas tau qhab nia qis ntawm kev tso tawm thiab qis ntawm tus nqi rov qab, thiab koj yuav pw tsaug zog.