Kev xaiv thiab kev teeb tsa ntawm surge protection device (SPD)

1.Cov txheej txheem xaiv

Thaum xaiv SPD rau cov khoom siv, peb yuav tsum txiav txim siab tsis yog qhov chaw ntawm cov cuab yeej siv tab sis kuj yog qhov kev ncua deb ntawm IT thiab lwm yam khoom siv, thiab kev npaj ntawm daim phiaj hluav taws xob yuav tsum tau txiav txim siab ua ntej (xws li TN-S, TT, IT system, thiab lwm yam). .Muab SPD ze dhau los yog deb dhau tuaj yeem muaj qhov tsis zoo rau kev tiv thaiv lub cuab yeej (ze dhau ua rau lub cuab yeej thiab SPD rau oscillate, deb dhau tuaj yeem ua tsis tau zoo).

Tsis tas li ntawd, kev xaiv ntawm SPD yuav tsum tau coj mus rau hauv tus account tam sim no ntawm lub cuab yeej, xyuas kom meej tias cov khoom xaiv SPD muaj lub peev xwm loj, ntsuas SPD raws li cov ntaub ntawv tau txais los ntawm cov chaw tsim khoom thiab coj mus rau hauv tus account lub neej kev pab cuam.surge tiv thaiv ntaus ntawv, xaiv tsis-aging.

Nws tseem yuav tsum tau muab sau tseg tias qhov siab tshaj plaws kev khiav hauj lwm voltage (UC) ntawm lub surge protector yog ntau tshaj qhov kev khiav hauj lwm voltage ntawm lub ntaus ntawv, thiab hais tias qhov teeb meem no, uas tej zaum yuav muaj transient overvoltage (UT), raug coj mus rau hauv tus account thaum xaiv SPD. , ib zaug muaj qhov no tej zaum ces tussurge tiv thaiv ntaus ntawvyuav tsum muaj qhov hluav taws xob qis dua UC.Hauv peb-theem fais fab system (220/380V), tsuas yog qee yam khoom siv tshwj xeeb (xws li cov cuab yeej tshwj xeeb lossis cov khoom siv fais fab uas xav tau kev tiv thaiv) yuav tsum tau tiv thaiv kev ua haujlwm dhau-voltage.

2.Kev tiv thaiv xob laim qib thiab tiv thaiv xob laim

Lub ntsiab lus ntawm SPD xaiv yog kom raug lees paub qhov voltage tiv thaiv qib (qhov seem voltage) Up, qhov siab tshaj tawm tam sim no, kom ntseeg tau tias Up yog tsawg dua qhov voltage ntawm cov khoom tiv thaiv, thiab tom qab ntawd tiv thaiv cov khoom siv.Raws li IEC60364-4-44, IEC60664-1 thiab IEC60730-1, thaum npaj, raws li daim ntawv qhia kev faib hluav taws xob tam sim no, xob laim tam sim no shunt kwv yees mis thiab xob laim tam sim no cov lus, yog lub hauv paus tseem ceeb rau xaiv SPD.Thawj qhov kev nkag ntawm lub tsev cov ntaub ntawv hluav taws xob hluav taws xob hluav taws xob tiv thaiv qib.

Los ntawm "Lub Tsev Cov Ntaub Ntawv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Kev Tiv Thaiv Kev Cai" GB50343-2012 kom paub meej txog qib kev tiv thaiv xob laim ntawm cov tuam tsev thiab cov kev ntsuas tam sim no ntawm cov hluav taws xob tam sim no tom qab thawj zaug xob laim stroke thiab thawj xob laim stroke;Qhov hluav taws xob tawm tsam qhov tshwm sim ntawm qhov hluav taws xob tam sim no amplitude kuj tuaj yeem tau txais los ntawm qhov hluav taws xob tawm tsam qhov cuam tshuam ntawm qhov ntsuas hluav taws xob tam sim no amplitude los ntawm qhov nruab nrab txhua xyoo thunderstorm hnub T. E = 1-nc / n.(E qhia txog kev thaiv cov khoom siv tiv thaiv, NC qhia qhov siab tshaj plaws uas tau txais txhua xyoo nruab nrab ntawm xob laim rau cov ntaub ntawv cov khoom siv puas tsuaj los ntawm xob laim hluav taws xob thiab hluav taws xob hluav taws xob, thiab N qhia txog qhov kwv yees txhua xyoo ntawm xob laim tawm tsam rau cov tsev):

(1) Qib A thaum E ntau dua 0.98;(2) qib B thaum E ntau dua 0.90 tsawg dua lossis sib npaug li 0.98;(3) Qib C thaum E ntau dua 0.80 tsawg dua lossis sib npaug li 0.90;(4) Qib D thaum E tsawg dua lossis sib npaug li 0.80;

Lub Lightning Protection Zone (LPZ) yuav tsum muab faib ua cheeb tsam tsis muaj kev tiv thaiv, thaj chaw tiv thaiv, thaj chaw tiv thaiv thawj zaug, thaj chaw tiv thaiv thib ob thiab thaj chaw tiv thaiv kev tiv thaiv.(daim duab 3.2.2) yuav tsum ua raws li cov cai hauv qab no:

Direct Lightning Protection Zone (LPZOA): tsis muaj qhov cuam tshuam ntawm qhov hluav taws xob hluav taws xob, txhua yam ntawm cov khoom yuav raug cuam tshuam ncaj qha los ntawm xob laim, yog qhov chaw qhib tag nrho.

Direct Lightning Protection Zone (LPZOB): lub electromagnetic teb tsis attenuate, txhua yam ntawm cov khoom tsis tshua raug kev txom nyem los ntawm hluav taws xob, yog ib tug tag nrho raug rau hluav taws xob tiv thaiv cheeb tsam.

Thawj Qhov Chaw Tiv Thaiv (LPZ1): Raws li qhov tshwm sim ntawm txoj kev tiv thaiv ntawm lub tsev, cov xob laim tam sim no ntws los ntawm ntau tus neeg xyuas pib raug txo qis dua li ntawm thaj chaw tiv thaiv hluav taws xob ncaj qha (LPZOB), cov hluav taws xob hluav taws xob pib pib thiab txhua hom Cov khoom yuav tsis raug rau xob laim ncaj qha.

Thaj Chaw Tiv Thaiv Thib Ob (LPZ2): thaj chaw tiv thaiv tom ntej tau qhia los ntawm kev txo qis ntxiv ntawm cov hluav taws xob tam sim no lossis hluav taws xob.

(5) Ua raws li Kev Tiv Thaiv Thaj Chaw (LPZN): Kev txo qis ntawm cov hluav taws xob hluav taws xob ntxiv yuav tsum tau ua kom tiv thaiv kev tiv thaiv kev tiv thaiv thaj tsam ntawm cov khoom siv siab heev.

3.Backup tiv thaiv rau surge protectors

Txhawm rau tiv thaiv SPD los ntawm luv luv Circuit Court vim kev laus lossis lwm yam tsis xws luag, kev tiv thaiv yuav tsum tau teeb tsa ua ntej SPD.Muaj ob txoj hauv kev uas feem ntau siv, ib qho yog kev tiv thaiv fuse, ib qho yog kev tiv thaiv kev tiv thaiv hluav taws xob.Tom qab ntau tshaj 50 tus neeg npaj cov lus nug tau pom tias ntau dua 80% ntawm cov neeg npaj siv cov khoom siv hluav taws xob, uas yog qhov tsis txaus ntseeg tiag tiag.Tus neeg sau xav tias nws yog ib qho yuam kev rau nruab qhov kev tiv thaiv hluav taws xob tiv thaiv, thiab kev tiv thaiv fuse yuav tsum tau nruab.

Kev tiv thaiv ntawm Surge Protector yog kev tiv thaiv luv luv, tsis muaj qhov xwm txheej dhau los, kev siv lub tshuab hluav taws xob tsuas tuaj yeem siv nws txoj kev tiv thaiv peb (lossis ob-tiv thaiv) hauv kev ua haujlwm tam sim ntawd.

Kev xaiv cov cuab yeej tiv thaiv kev tiv thaiv surge tiv thaiv yuav tsum yog raws li lub peev xwm luv luv ntawm SPD cov cuab yeej.Lub luv luv-circuit tam sim no ntawm cov khoom siv ntawm surge protector feem ntau yog loj, yog tias siv ib tug Circuit Court breaker, ces xav tau ib tug Circuit Court breaker ntawm siab subsection muaj peev xwm.

Nws yog ib qho tsim nyog los xam cov thermal stability ntawm tus neeg xyuas pib txuas nrog lub surge protector thaum siv lub Circuit Court breaker.Raws li qhov luv luv-circuit peev xwm ntawm qhov taw tes, tus neeg xyuas pib seem xaiv yuav loj heev thiab cov xaim tsis yooj yim.

Txhawm rau nkag siab txog Txoj Cai ntawm Kev Tiv Thaiv Kev Tiv Thaiv, nyem rau ntawmTxoj cai ntawm Surge Protection Device