Kev tiv thaiv av hauv av
Lub npe tag nrho lub npe ntawm av txhaum kev tiv thaiv yog "{- paim av txhaum kev tiv thaiv", uas yog ib qho kev ua txhaum rau hauv av.
Qhov laj thawj tseem ceeb yog kev ua kom los ntawm kev rhuav tshem txheej txheej ntawm ib qho - theem cable. Tsis zoo li peb {- theem luv luv lub voj voog, tsis ntev} pageCuit Court tam sim no ntawm ib qho- pars av txhaum yog me me.
Cov kev sib txawv yuav tau saws los rau hauv av ua txhaum kev tiv thaiv raws li qhov ntau thiab tsawg tam sim no. Muaj ntau txoj hauv kev los tiv thaiv hauv av hauv TN system:
① Thaum cov kev tiv thaiv dhau los ua tau raws li kev txiav txim siab tau txais, luv} {{}} ncua kev tiv thaiv ntawm overcuit haum kev tiv thaiv yog siv.
② Thaum cov kev tiv thaiv dhau los tsis tau raws qhov yuav tsum tau ua tiav, kev tiv thaiv av tam sim no tuaj yeem siv. Cov ua txhaum hauv av hauv av tam sim no yog qhov loj, thiab nws ua tau rau siv av tiv thaiv tam sim no. Rau cov kev sib txuas sib ke nrog cov hluav taws xob hluav taws xob, plaub lub zog tiv thaiv tuaj yeem xaiv, kev ncua ntev ID, Luv Luv ISD, Luv Luv Daws Kev Tiv Thaiv II thiab av tsis ua txhaum IG.
③ Thaum cov kev tiv thaiv dhau los tsis tau raws cov kev tiv thaiv kev rhiab, RCD kev coj ntawm kev tshem tawm, RCM kev ua ntawm lub tswb). Kev xaiv ntawm residual kev tiv thaiv tam sim no feem ntau yog txhim kho cov kev ua rhiab, tab sis nws lub luag haujlwm tsis txwv rau qhov no.
Kev tiv thaiv kev txiav txim siab ntawm cov txheej txheem saum toj no yog maj mam nce ntxiv (los ntawm ntau tshaj 100 amperes mus rau ntau tshaj li milliamperes).
Raws li rau lub hauv paus ua txhaum kev tiv thaiv ntawm TT system, vim tias cov kev tiv thaiv av tam sim no tsis tuaj yeem ua tau raws li kev tiv thaiv tam sim no, thiab tsuas yog ua tiav los ntawm kev tiv thaiv tam sim no.
Yog li ntawd, cov kev tiv thaiv overcurrent thiab xoom - ntu kev tiv thaiv kab mob loj hauv qab no, tsuas yog tiv thaiv kab mob siab tam sim no, thiab cov hluav taws xob sib txawv (hluav taws xob) tshwm sim los ntawm nws.
Qhov av txhaum kev tiv thaiv hauv Circuit Court Breaker tsis tuaj yeem tiv thaiv hauv av arc hluav taws lossis hluav taws xob ntiag tug.
Kev tiv thaiv tam sim no
Residual kev tiv thaiv tam sim no yog siv los tiv thaiv ob qho tib si "kev nyab xeeb ntawm tus kheej", kom tiv thaiv hluav taws xob sib cuag hluav taws xob hauv tsev.
Kev tiv thaiv tshwj xeeb yog raws li hauv qab no:
①when siv los tiv thaiv kev tiv tauj ncaj qha, nws cov kev tiv thaiv tus nqi yuav tsum tsawg dua lossis sib npaug rau 30ma (siab rhiab). Kev tiv toj ncaj qha hluav taws xob liam tias cov txhaum tam sim no rov qab los rau lub zog nruab nrab ntawm lub zog nruab nrab ntawm lub zog nruab nrab ntawm lub zog nruab nrab ntawm tib neeg lub cev, yog li nws yuav tsum tsis pub ntev tshaj 30ma ua kom tsis txhob raug txiav tawm sai sai, sai dua qhov zoo dua.
②when siv los tiv thaiv kev sib cuag ncaj qha, tus nqi tiv thaiv tus nqi tuaj yeem yog 30 ~ 3000ma (nruab nrab rhiab). Nws yuav tsum tau taw qhia ntawm no tias RCD kev teeb tsa tus nqi siv los tiv thaiv kev sib cuag ncaj qha tuaj yeem yog ntau dua 30mA.
Because indirect contact electric shock protection assumes that the insulation of the equipment is damaged during operation, in order to prevent electric shock, in a normal environment, when the expected contact voltage exceeds 50V, the fault circuit should be cut off in advance within the specified time.
Rau TN system, tsuas yog RCD kev teeb tsa tus nqi ITN tsawg dua lossis muaj sib npaug ntawm 220 / z Pom tseeb, qhov teeb tsa tus nqi ntawm iq tuaj yeem yog kaum ntawm amperes, tsis yog 30mA.
Rau tt system, i?n tsawg dua los yog sib npaug ntawm 50 / ra yuav tsum muaj (feem tiv thaiv kev tiv thaiv tus nqi kawg, feem ntau tsawg dua los yog sib luag rau 10 oAst), thiab Ia kuj tseem tuaj yeem muaj ntau dua 30mA.
③ Thaum siv los tiv thaiv hluav taws xob hluav taws xob, tus nqi tiv thaiv tus nqi feem ntau feem ntau yog 100 ~ 300mA. Rau cov ncej hluav taws xob ua txhaum ACB, cov chaw tiv thaiv kev tiv thaiv tam sim no tuaj yeem yog 0.5 ~ 30a (qis dua cov rooj sib deev
Tshooj 6.4.3 ntawm GB50054-2011 "Qes Hluav Taws Xob Hluav Taws Xob uas tsis muaj peev xwm saib xyuas cov khoom siv hluav taws xob los ntawm kev tiv thaiv hluav taws xob lossis cov khoom siv hluav taws xob tsis txhob muaj kev ua haujlwm tam sim no ntau dua 300MA.
Vim tias cov kev xav tau nyob rau hauv cov kev tsim nyog hauv kev tsim tawm, ntau tus neeg feem ntau teeb tsa cov chaw tam sim no tsis pub dhau 300 lub sijhawm thaum siv RCD los tiv thaiv hluav taws xob hluav taws xob.
Txawm hais tias cov txheej txheem technical of i6 - tc64 taw qhia tias arc zog saum 300 yauv tau hluav taws xob. Tab sis peb tsis quav ntsej nws qhov xwm txheej, uas yog, qhov xwm txheej yog qhov chaw tua hluav taws.
Qhov chaw tua hluav taws yog dab tsi? Nws yog qhov chaw tua hluav taws uas cuam tshuam rau cov ntoo, ntawv, paj rwb, thiab hmoov av, thiab khaws cia.