Dab tsi yog lub hom phiaj ntawm kev tiv thaiv av?

Lub hom phiaj tseem ceeb ntawm kev tiv thaiv av yog qhov txwv tsis pub muaj kev tiv thaiv av thiab kev ntseeg tau, thaum ntsuas qhov yuav tsum muaj cov cuab yeej ntawm kev tiv thaiv thiab txuas ntxiv hluav taws xob. Nov yog qee cov ntsiab lus:
1.Qhov kev txhaum rau kev ua txhaum tam sim no thiab tiv thaiv kev nyab xeeb khoom siv.
Cov kev ua haujlwm luv: Yog tias cov ntsiab lus ncaj qha yog av ncaj qha, xws li}}}}}}}}}}}}}}}} paab cov khoom siv xws li cov hloov pauv, hluav taws xob ntau dua thiab txawm tias hluav taws kub.
Kev Ua Si Grounding Txoj Cai: Los ntawm kev tso cov resistor (feem ntau los ntawm aa ob peb txhiab ohms), qhov kev txhaum tam sim no yog txwv rau ntau ob peb amperes rau ob peb lub amber ameres). Piv txwv li:
Tsawg -} voltage tshuab (xws li 400v): OHSOR tus nqi tuaj yeem los ntawm ntau txhiab OHMS, txwv qhov txhaum tam sim no rau qee qhov kev kho mob kom tiv thaiv cov khoom puas.
Nruab nrab voltage system (piv txwv li . 6-35 kv): tsis muaj ntau zaus, txwv qhov txhaum tam sim no kom tiv thaiv arc overload. OverVolTage Kev Txom Nyem, Overvoltage Rwb Thaiv Tsev Thiab Kev Tiv Thaiv
Arc -} pa taws ntau dua: thaum nruab nrab ntawm lub arc, ua qhov tsis zoo los ntawm ARC, ua rau muaj kev cuam tshuam ntau dua, ua txhaum kev sib tw thiab kev hem lub rwb thaiv tsev ntawm cov khoom siv.
Resonant OverVoltage: kev sib cuam tshuam ntawm lub capacitor tam sim no thiab inductive tam sim no ntawm lub system no yuav ua rau resonance thiab txuas ntxiv ntxiv cov overvoltage amplitude.
Tus neeg ntaus nkoj mus thaiv kev 'suppressing cuam tshuam:
Cov nqi tshuav them ntxiv: Tom qab ua txhaum Arc extinguished, lub resistor muab txoj kev paug rau cov seem uas tshuav nyob rau hauv qhov system, txo qhov tshwm sim ntawm arc reignition.
Resonance damping: lub resistor ua raws li cov damping lub caij, cuam tshuam nrog kev kho mob rov qab los ob zaug ntawm cov kev pabcuam hluav taws xob, thiab txuas rau lub neej pabcuam ntawm lub cuab yeej.
3. Txhim kho lub zog hluav taws xob txuas ntxiv thiab txo cov khoom siv hluav taws xob tsawg
Cov kev txwv ntawm kev ua ncaj qha: thaum muaj kev txhaum, tiv thaiv cov cuab yeej yuav tau dhia tam sim ntawd, ua rau muaj hluav taws xob tam sim ntawd.
Qhov zoo ntawm kev tiv thaiv av:
Short-term license: In the case of a single-phase grounding fault, a medium-voltage system (say, 10kV) can operate for two hours to allow time for repairs. Xaiv kev tiv thaiv: Siv xoom {{5 5}} ntu ntu tam sim no lossis tsis zoo ua txhaum cov kab, kom tsis txhob disconnect txhaum kab, kom tsis txhob disconect kev txhaum cov kab hauv tsis {}}}} kev txhaum thaj chaw.
4. Kev tiv thaiv cov khoom siv thiab cov txheej txheem ruaj khov
Cov Khoom Siv Khoom Siv: Cov Khoom Siv Hluav Taws Xob txwv qhov txhaum tam sim no rau cov khoom pub rau cov khoom muaj cai, tiv thaiv kev sib cais lossis kev puas hlwb.
System Stability:
Txo ARC Discom: Qhov kev txhaum tsawg tam sim no txo ​​lub zog ARC thiab txo cov hluav taws thiab tawg kev pheej hmoo.
Txo cov khoom tawg tam sim no: kev txwv av ua txhaum tam sim no tuaj yeem txo corrosion ntawm cov kav hlau hlau thiab cov qauv txheej txheem.
Hloov pauv kom haum rau cov xwm txheej sib txawv
Tsawg - voltage tshuab (xws li lub tsev faib khoom):
Lub Hom Phiaj: Txhawm rau tiv thaiv kom tsis txhob muaj kev cuam tshuam los ntawm kev ua txhaum kev txhaum tam sim no kom muaj kev nyab xeeb rau tib neeg (piv txwv li tsawg dua 30MA).
Piv txwv li, cov cuab yeej siv tam sim no (RCD) yog siv rau hauv lub voj voog hauv tsev. Nws sab hauv resistor ua haujlwm nrog kev ua haujlwm tripping kom ua tiav nrawm zog hluav taws xob.
Nruab nrab voltage tshuab (xws li muaj cov phiaj xwm fais fab):
Lub Hom Phiaj: Ntsuas cov khoom siv tiv thaiv cov khoom siv thiab txuas ntxiv nyob rau hauv cov xim dub nyob rau ntawm cov tsev kho mob thiab cov chaw teev. Cov ntaub ntawv: Cov nroj tsuag tshuaj ua kom zoo tshaj plaws, uas qhov kev txwv txhaum tam sim no ntawm 10KV system mus rau 5A thiab ua kom muaj zog txuas ntxiv.
High - voltage tshuab (xws li cov nroj tsuag fais fab):
Lub Hom Phiaj: Suppressing Overvoltage, tiv thaiv cov tshuab hluav taws xob thiab cov khoom rwb thaiv hluav taws xob transformer.
Cov xwm txheej: Lub tshuab hluav taws xob loj cuam tshuam nrog lub zog loj (piv txwv li}} theem txhaum tam sim no kom tsawg dua 0.5a.
6. Ua raws li cov qauv thoob ntiaj teb thiab cov kev cai nyab xeeb
Cov Qauv Yuav Tsum Tau: Ieee, iec thiab lwm tus qauv muab tus qauv tiv thaiv tus nqi, qhov kub yuav tsum tau ua rau resistor av.
Qhov ntsuas kub: Lub resistor yuav tsum muaj peev xwm tiv taus cov cua sov tsim los ntawm kev txhaum cov khoom (piv txwv li. 760 degree).
Kev Nyab Xeeb Kev Nyab Xeeb