Qhov txawv ntawm Chav Kawm 1 thiab Chav Kawm 2 yog dab tsi?

Cov cuab yeej tawg-pov thawjthiab cov khoom siv yog tsim los kom tsis txhob muaj roj thiab cov khoom siv hluav taws xob los ntawm qhov hluav taws kub, ua kom tib neeg muaj kev nyab xeeb thaum muaj xwm txheej txaus ntshai. Muaj ob chav kawm ntawm cov khoom tawg-pov thawj uas tau teev tseg los ntawm National Electrical Code (NEC): Chav Kawm 1 thiab Chav Kawm 2. Qhov sib txawv ntawm ob pawg tau teev tseg hauv qab no.

Explosion Proof Chav Kawm 1:
Chav Kawm 1 cov khoom pov thawj tawg yog tsim rau cov chaw txaus ntshai nrog qhov tsis tu ncua lossis tsis sib xws ntawm huab cua ntau ntawm cov pa hluav taws xob, vapors, thiab cov kua dej uas muaj peev xwm ua ke los tsim cov khoom tawg lossis tawg. Thaum muaj lub caij nyoog tseem ceeb uas cov roj hluav taws xob tuaj yeem tshwm sim, xws li hauv cov refineries, tshuaj nroj tsuag, thiab cov roj thiab roj, cov cuab yeej no feem ntau yog siv.

Kev faib tawm 1 thiab 2 suav nrog kev faib tawm ntxiv ntawm Chav Kawm 1 cov khoom tiv thaiv tawg. Cov chaw muab faib ua Division 1 yog cov chaw uas ib txwm muaj cov khoom tawg tuaj yeem tshwm sim, thaum Division 2 qhov chaw tsuas muaj cov ntaub ntawv no thaum muaj xwm txheej txawv txawv.

Class 2 Explosion-Proof:

Cov cuab yeej cais raws li Class 2 explosion pov thawj yog npaj rau siv nyob rau hauv ib puag ncig uas muaj ib tug tseem ceeb concentration ntawm flammable plua plav nyob rau hauv cov huab cua, uas tej zaum yuav ua rau tawg. Cov teb no feem ntau pom muaj nyob rau hauv cov zaub mov & dej haus, lis tuav, thiab kws tshuaj.

Chav Kawm 2 tau muab faib ua ob pawg, ntau npaum li Chav Kawm 1. Cov cheeb tsam tau muab faib ua Division 1 yog cov chaw uas muaj cov plua plav nplaim taws tuaj yeem tshwm sim los yog qee zaum, thaum Division 2 yog cov uas muaj plua plav tawg tsuas yog nyob rau hauv qhov xwm txheej txawv.

Cov yam khoom muaj kev phom sij uas muaj nyob rau hauv ib puag ncig txiav txim qhov txawv ntawm cov khoom tawg-pov thawj cais raws li Chav Kawm 1 thiab Chav Kawm 2. Chav Kawm 2 yog npaj rau cov plua plav combustible, thaum Chav Kawm 1 yog npaj rau cov pa taws, vapors, thiab kua. Txhawm rau kom muaj kev nyab xeeb zoo, nws yog ib qho tseem ceeb los txiav txim siab hauv chav kawm thiab faib cov khoom pov thawj tawg rau ib puag ncig.

Hauv kev xaus, yam khoom muaj phom sij muaj nyob hauv ib puag ncig yog qhov sib txawv ntawm Chav Kawm 1 thiab Chav Kawm 2 cov khoom pov thawj tawg. Txhua chav kawm tus qauv tsim tshwj xeeb yog tsim los muab qib siab tshaj plaws ntawm kev tiv thaiv cov plua plav thiab cov pa phem. Txhua yam khoom tawg-pov thawj cov chav kawm thiab kev faib yuav tsum paub txhawm rau lav txhua tus neeg muaj kev nyab xeeb hauv qhov xwm txheej txaus ntshai.