Qhia peb txog tus RCD: nws yog dab tsi thiab yuav ua li cas nws ua hauj lwm

Nyob rau hauv no muaj hnub nyoog ntawm siab technology neeg yog surrounded los ntawm ib tug loj loj tus naj npawb ntawm pab kiag li lawm thiab khoom, ua hauj lwm nrog cov kev pab los ntawm hluav taws xob. Thiab ntau dua qhov lub xov tooj, ntau dua qhov lub sij hawm ntawm hluav taws xob poob siab. Kom tsis txhob no, nws twb yees ua los ntawm cov RCD. Yuav ua li cas yog nws thiab yog vim li cas koj xav tau, peb piav qhia txog nyob rau hauv kom meej nyob rau hauv no tsab xov xwm.

lub sij hawm

Ntaus (RCD) yog tsim los rau differential tiv thaiv ntawm ib tug neeg los ntawm ib tug hluav taws xob poob siab thaum kov qhov hluav taws xob rau vaj tse (tsev neeg hluav taws xob khoom siv), uas twb energized thaum lub rwb thaiv tsev txhaum.

Thaum lub RCD yog txhais

Peb mus txuas ntxiv rau zaj dab neeg ntawm lub RCD. Yuav ua li cas nws yog thiab yuav ua li cas nws ua hauj lwm? Tom qab ib tug neeg tau nphav qhov nyob rau hauv voltage kws tsev nyob, ib tug hluav taws xob tam sim no pib rau ntws. Thaum nws nce mus txog tus nqi ntawm 30 ma, lub RCD tripping tshwm sim. Raws li ib tug tshwm sim, lub voltage yog txiav kaw los ntawm lub puas khoom. Tus neeg no tsis xav tias ib yam dab tsi raws li mob ncus tshwm sim nyob rau ntau currents (50 MA). Kev tuag rau tib neeg yog ib tug tam sim no ntawm 100 ma.

Yuav ua li cas nws muaj RCD

Qhov seem tam sim no Circuit Court breaker muaj xws li ib tug tam sim no transformer, ib tug Actuator (relay system thiab tawg levers), nws tus kheej-xeem circuitry. Ntau sophisticated pab kiag li lawm muaj nyob rau hauv lawv cov qauv thiab system ntawm lub electromagnetic rov qab nqi ntawm cov cutoff tam sim no (tiv thaiv tawm tsam luv luv-Circuit Court currents thiab overload).

Cov kev khiav hauj lwm hauv paus ntsiab lus ntawm cov RCD

Yuav ua li cas yog nws? Yuav ua li cas no ntaus ntawv yog tshuab txais? Tam sim no peb qhia txog tag nrho cov no ntau yam. Lub lag luam ntawm lub RCD nteg transformer hauv paus ntsiab lus ntawm cov lag luam tam sim no (DC). Theem thiab ua hauj lwm conductors kis tau los ntawm xoom tam sim no transformer. Thaum ib txwm khiav hauj lwm cov khoom (nrog rau lawm rwb thaiv tsev) tus nqi ntawm currents ntws los ntawm lawv yog muaj sib npaug nyob rau hauv qhov ntau tab sis opposite nyob rau hauv cov kev taw qhia. Raws li ib tug tshwm sim, lawv ntxias ib tug sib nqus flux nyob rau hauv lub winding ntawm lub CT, uas yog zoo tib yam nyob rau hauv qhov ntau tab sis opposite nyob rau hauv cov kev taw qhia uas tag rho txhua lwm yam (nyob rau hauv CT theem nrab winding xaus ntawm tsis muaj voltage). Thaum ib tug rwb thaiv tsev txhaum khoom ib feem ntawm cov theem pib tam sim no to rau hauv av los ntawm lub grounding neeg xyuas pib (thaum lub vaj tse yog grounded) los yog los ntawm ib tug neeg kov rau qhov no tshuab. Raws li ib tug tshwm sim, tus nqi ntawm cov tam sim no ntws nyob rau hauv lub nruab nrab neeg xyuas pib, yuav me dua cov theem ntawm kev taug kev. Qhov no ua rau lub fact tias cov magnetic fluxes nyob rau hauv lub transformer winding yog txawv nyob rau hauv qhov ntau. Raws li ib tug tshwm sim, qhov xaus ntawm lub CT voltage zoo nkaus li. Tom qab ib tug relay kev cob cog rua rau lawv, tam sim no pib rau ntws. Thaum ncav lub paj tau paj mus rau 30 ma, relay, actuating levers rhuav system. Cov khoom yog switched tawm.

Cov menyuamuas ntawm lub RCD

Nws yog tsuas yog tom qab lub cim thiab troubleshooting ntawm hluav taws xob khoom, uas coj mus rau lub triggering ntawm tus dais los ntawm nias lub cocking levers.

xaus

Nyob rau hauv no tsab xov xwm, peb ua tswvcuab koj nyob rau hauv ib co nthuav dav nrog lub RCD: nws yog dab tsi, yuav ua li cas nws ua hauj lwm thiab dab tsi yog siv. Peb cia siab tias cov lus qhia no yog pab tau rau koj.