Nkag siab txog Overcurrent, Overload, thiab Overvoltage: Kev Tiv Thaiv Koj Cov Hluav Taws Xob nrog Precision
Feb 04, 2024
Kev Taw Qhia Kev Sib Tw Hluav Taws Xob: Overcurrent, Overload, thiab Overvoltage.
1. Overcurrent
- Txhais:
Overcurrent tshwm sim vim overload, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm ib tug luv luv Circuit Court, pib tshaj tam sim no ntws nyob rau hauv lub Circuit Court.
- Nyob rau hauv luv luv Circuit Court tej yam kev mob:
Hauv qhov xwm txheej luv luv, qhov tshwj xeeb tshaj plaws tam sim no nkag mus rau hauv Circuit Court, ua rau qhov hluav taws xob ntawm cov khoom thauj khoom poob zero. Qhov no tuaj yeem ua rau lub rwb thaiv tsev tsis ua haujlwm, hluav taws kub, khoom siv puas tsuaj, thiab, thaum muaj xwm txheej hnyav, kev tawg txaus ntshai.
Xav txog 125A Circuit Court breaker nrog cov hlau nplaum teeb ntawm 200% txuas nrog 100A load circuit. Thaum lub load tam sim no nce thiab ncav cuag 125A txwv, lub Circuit Court breaker nws thiaj li mus ncig. Yog hais tias tam sim no surges mus rau 200A, lub Circuit Court breaker sai activates, tiv thaiv lub Circuit Court los ntawm overcurrent tshwm sim los ntawm ib tug luv luv Circuit Court.
- Kev tiv thaiv overcurrent:
Kev tiv thaiv luv luv, qhov twg tam sim no ntau dhau ua rau muaj kev hem thawj rau cov khoom siv sib txuas, ua tiav los ntawm cov khoom siv xws li fuses, Circuit Court breakers, overcurrent relays, tam sim no limiters, kub sensors, thiab solid-state power switches. Tsis tas li ntawd, thermal-magnetic trip circuit breakers muaj kev tiv thaiv overcurrent thiab overload.
2. Tshaj dhau
- Txhais:
Overload tshwm sim thaum tam sim no lees txais los ntawm kev thauj khoom tshaj qhov qub lossis ntsuas tam sim no.
- Piv txwv:
Yog tias cov xov hlau tsim los rau kev nyab xeeb tam sim no ntawm 20A tau siv, lub Circuit Court tuaj yeem tiv thaiv los ntawm qhov tsawg kawg nkaus tam sim no ntawm 20A lossis 125% (20A load tam sim no x 125%=25A). Nyob rau hauv tas li ntawd, siv lub siab tshaj plaws 25A Circuit Court breaker rau kev tiv thaiv yog ib qho tseem ceeb. Siv 30A ~ 35A Circuit Court breaker es tsis txhob ntawm qhov ntsuas yuav tso cai rau cov dej ntws ntau dua li cov xaim muaj peev xwm, ua rau muaj peev xwm overheating thiab hluav taws.
- Lwm qhov piv txwv:
Overloading tuaj yeem cuam tshuam nrog kev sib txuas ntawm 1.5kW load rau 1kW alternator, inverter, lossis transformer, uas ua rau cov dej ntws tam sim no 1.5 npaug siab dua qhov ntsuas tam sim no.
- Kev sib txawv:
Overcurrent feem ntau hais txog qhov tam sim no ntau dhau, feem ntau ntau dua ob npaug ntawm qhov ntsuas tam sim no, thaum muaj kev txhawj xeeb txog overloaded lub sij hawm ntev ntawm tam sim no tshaj 1.5 npaug ntawm qhov ntsuas tam sim no.
- Kev tiv thaiv overload:
Kev tiv thaiv tiv thaiv overheating tshwm sim los ntawm lub caij nyoog overcurrent txaus yog tiav los ntawm qeeb fuses thiab overload relays. Thermal-magnetic circuit breakers pab txhawb ob qho tib si overcurrent thiab overload tiv thaiv. Cov khoom sib nqus muaj kev tiv thaiv overcurrent, thaum lub thermal tiv thaiv tiv thaiv Circuit Court los ntawm overload, kev khiav hauj lwm ntawm lub sij hawm hloov pauv.
- Activation Threshold:
Feem ntau, lub overload tiv thaiv Circuit Court activates thaum lub tam sim no ntws nyob rau hauv lub Circuit Court yog 120% mus rau 160% ntau tshaj qhov ntsuas fais fab mov tam sim no.
3. Tshaj dhau
- Txhais:
Overvoltage tshwm sim thaum qhov kev khiav hauj lwm lossis cov khoom siv hluav taws xob ntau tshaj qhov system cov chaw tsim khoom tshwj xeeb ntsuas hluav taws xob.
- Xwm:
Overvoltage yog tus cwj pwm los ntawm cov khoom siv hluav taws xob ntawm lub cuab yeej tshaj nws qhov ntsuas hluav taws xob nominal. Feem ntau, tshwj tsis yog tias tau teev tseg, overvoltage tshwm sim thaum cov khoom siv hluav taws xob nce mus rau 1.1 (110%) ntawm cov cuab yeej ntsuas hluav taws xob.
- Piv txwv:
Piv txwv li, yog tias qhov ntsuas hluav taws xob nyob ntawm lub tshuab npe cov ntaub ntawv yog 230VAC ± 10%, tshaj 250V vim qhov hluav taws xob dhau tuaj yeem ua rau lub cev tsis ruaj khov, ua rau overheating thiab cov khoom siv puas tsuaj.
- Kev tiv thaiv overvoltage:
Kev tiv thaiv overvoltages tshwm sim los ntawm xob laim tawm tsam, lub zog hluav taws xob thiab kev hloov hluav taws xob, kev cuam tshuam hluav taws xob, thiab lwm yam, suav nrog kev siv avalanche diodes, voltage-dependent resistors (VDR), roj tawm li qub, xob laim, thiab arc horns. Kev tiv thaiv hluav taws xob me me feem ntau siv cov hluav taws xob hluav taws xob raws li Zener diodes, txiav tawm lub zog thaum cov khoom siv hluav taws xob nce mus rau 110% mus rau 130% siab dua cov cuab yeej ntsuas hluav taws xob.
- Ua kom muaj kev nyab xeeb:
Txoj kev no tiv thaiv overvoltage-txog kev puas tsuaj rau cov khoom siv txuas nrog los ntawm kev txiav tawm hluav taws xob ua ntej muaj kev puas tsuaj.
Hauv kev xaus, kev nkag siab dav dav ntawm overcurrent, overload, thiab overvoltage yog qhov tseem ceeb rau cov kws tsim hluav taws xob los xyuas kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov tshuab hluav taws xob thiab cov khoom siv sib txuas.
WrinduLub tuam txhab tshwj xeeb hauv kev tsim khoom thiab muag khoom ntawmtransformer test khoomthiab cov khoom siv ntsuas hluav taws xob tiv thaiv. Koj tuaj yeem sab laj txhua lub sijhawm.
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