Keeb Kwm Kev Txhim Kho Ntawm Cov Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob

Txij li thaum tsim thiab siv hluav taws xob, nws tau coj ob qho tib si yooj yim thiab txaus ntshai txaus ntshai. Nws tuaj yeem ua rau cov khoom siv puas tsuaj, ua rau hluav taws kub, lossis ua rau hluav taws xob poob. Ib qho khoom siv uas ua kom muaj kev nyab xeeb ntawm kev siv hluav taws xob yuav tiv thaiv ntau yam tsis tsim nyog. Yog li ntawd, nrog rau kev loj hlob ntawm ntau yam khoom siv hluav taws xob, ntau yam khoom siv tiv thaiv kuj tau tshwm sim. Ib hom tshwj xeeb tsim los tiv thaiv tib neeg yog cov khoom siv tam sim no (RCD). Feem ntau hu ua qhov hloov pauv tam sim no, RCD yog ib qho khoom siv tiv thaiv uas siv los tiv thaiv hluav taws xob thiab hluav taws xob hluav taws xob thaum lub caij luv luv rau hauv av tshwm sim vim muaj kev puas tsuaj hauv hluav taws xob hauv Circuit Court lossis khoom siv. Nws feem ntau yog ntsia rau ntawm lub qhov (socket circuit) ntawm txhua tsev neeg lub thawv xa khoom thiab ntawm cov khoom siv hluav taws xob ntawm lub tsev lub thawv loj, qhov kawg tshwj xeeb rau kev tiv thaiv hluav taws xob hluav taws xob.

RCDs tau dhau los ua txoj kev loj hlob ntev thiab tam sim no tau siv thoob ntiaj teb.

Xyoo 1930, lub zog hluav taws xob- ua haujlwm RCD tau tsim nyob rau hauv Tebchaws Europe los tiv thaiv kev sib tsoo hluav taws xob los ntawm kev puas tsuaj hauv cov khoom siv hluav taws xob. Xyoo 1960, ib qho tam sim no - ua haujlwm RCD tshwm. Tam sim no, qhov hluav taws xob- cov khoom siv tam sim no (RCDs) tau raug txiav tawm thoob ntiaj teb, thaum lub sijhawm tam sim no -RCDs tau dhau los ua cov khoom siv hluav taws xob tseem ceeb rau kev tiv thaiv tawm tsam tam sim no thiab hluav taws xob poob siab.

Nyiv pib tsim hluav taws xob- ua haujlwm RCDs hauv xyoo 1964 los tiv thaiv hluav taws xob poob siab ntawm qhov chaw tsim kho. Xyoo 1966, nws tau xa cov khoom siv hluav taws xob hluav taws xob tuaj txawv teb chaws - ua haujlwm RCDs los ntawm lub teb chaws Yelemees sab hnub poob, thiab pib tsim cov RCDs sib xyaw ua ke hauv xyoo 1976.

Tebchaws Asmeskas tau pib siv tam sim no -RCDs ua haujlwm hauv xyoo 1967. Kev sib tsoo hluav taws xob ntawm cov pas dej da dej ua rau muaj kev loj hlob ntawm RCDs, thiab los ntawm qhov pib, xav tau RCDs nrog cov dej xau tam sim no ntawm 5mA.

Tuam Tshoj pib tsim hluav taws xob- ua haujlwm RCDs hauv xyoo 1966, pib tsim thiab tsim hluav taws xob RCDs hauv xyoo 1976, thiab nyob rau xyoo 1985, nws tau tsim thiab tsim cov RCDs sib xyaw ua ke.

Kev siv dav dav ntawm RCDs yog sib cais los ntawm kev tsim cov qauv siv thiab cov cai. Xyoo 1971 tsab ntawm US National Electrical Code (NEC) tau tso cai rau kev teeb tsa cov khoom siv tam sim no (RCDs) hauv cov tsev nyob thiab cov chaw tsim kho, pib lub Ib Hlis 1, 1973. Nyiv Cov Khoom Siv Hluav Taws Xob Cov Qauv Txheej Txheem thiab Ministry of Labor Txoj Cai Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv tau teev tseg tias cov khoom siv hluav taws xob ua haujlwm nrog 6 RCDs yuav tsum muaj ntau tshaj li qhov chaw, thiab cov khoom siv hluav taws xob yuav tsum muaj ntau tshaj li ntawm 6 RCDs. 400V circuits yuav tsum muaj RCDs nruab.

Xyoo 1981, Tuam Tshoj yav dhau los Lub Tsev Haujlwm Saib Xyuas Kev Tsim Kho Vaj Tse tau tshaj tawm "Kev Txiav Txim Siab Ua Haujlwm Kev Tiv Thaiv Kev Ua Haujlwm," uas tau txib kom txhua yam khoom siv hluav taws xob ntawm qhov chaw tsim kho yuav tsum tau nruab nrog RCDs. GB3787-1983, "Txoj Cai Kev Nyab Xeeb Kev Nyab Xeeb rau Kev Tswj Xyuas, Kev Siv, Kev Tshuaj Xyuas thiab Kev Tswj Xyuas Tes- tuav Cov Cuab Yeej Hluav Taws Xob," tsim nyob rau xyoo 1983, qhia tias txhais tes- tuav cov cuab yeej hluav taws xob yuav tsum siv cov cuab yeej tam sim no (RCDs). JGJ46-1988, "Kev Nyab Xeeb Kev Qhia Tshwj Xeeb rau Kev Siv Hluav Taws Xob Ib ntus ntawm Cov Chaw Tsim Kho," tsim los ntawm Ministry of Construction hauv xyoo 1988, qhia tias cov khoom siv hluav taws xob siv hluav taws xob thiab cov cuab yeej siv hluav taws xob yuav tsum tau nruab nrog RCDs, thiab yuav tsum tau siv ob theem RCD kev tiv thaiv, suav nrog kev siv hluav taws xob loj ntawm RCD kev tiv thaiv.