Differential relay: lub hom phiaj thiab lub peev xwm

Difrele thiab difautomats yog cov khoom siv zoo sib xws. Lawv txawv ntawm kev tsim thiab lub hauv paus ntsiab lus ntawm kev ua haujlwm. Cia peb xav txog ntau yam ntxiv lawv cov yam ntxwv thiab qhov sib txawv.

Cov yam ntxwv yooj yim

Difrel yog ib yam khoom uas tiv thaiv cov neeg siv khoom los ntawm hluav taws xob poob siab nyob rau hauv kev sib cuag nrog ib tug conductive nto. Piv txwv li, ib qho hluav taws xob tsis muaj hluav taws xob, lub tshuab hluav taws xob, lub cev muaj zog.

sib txawv relay - Cov cuab yeej tsim nyog los tiv thaiv hluav taws kub ntawm cov khoom siv nrog cov rwb thaiv tsev puas thiab cov hluav taws xob tsis zoo. Cov RCDs no qhib lub voj voog thaum lawv tshwm sim hauv cov xaim yog tias muaj qhov tsis txaus ntseeg tam sim no tshwm sim.

Kev lag luam tsim ob hom difrele:

• AC hom. Xws li relays yog tsim los teb rau cov to ntawm sinusoidal alternating tam sim no.
• Hom A. Tsim los rau kev teeb tsa hauv cov circuits uas pub cov khoom siv uas muaj rectifiers lossis thyristors nyob rau hauv nws muaj pes tsawg leeg. Ntawd yog, qhov twg, nyob rau hauv qhov kev tshwm sim ntawm kev puas tsuaj ntawm rwb thaiv tsev, cov dej ntws ntawm ob qho tib si ncaj qha thiab hloov tam sim no tshwm sim. Cov lus qhia rau kev txhim kho xws li relays muaj nyob rau hauv cov lus qhia ua haujlwm rau qee yam khoom siv hauv tsev.

Yuav ua li cas yog ib tug difrele txawv los ntawm ib tug difavtomat?

Ib tug difrele los yog RCD nrog ib tug sib txawv automaton muaj ib co zoo sib xws, tshwj xeeb tshaj yog cov sab nraud, tab sis lub hauv paus ntsiab lus ntawm kev khiav hauj lwm ntawm cov cuab yeej no txawv ho. Qhov sib txawv relay cuam tshuam nrog kev tsom xam vector tam sim no hauv theem - 0.

Yog tias cov lej ntawm cov vectors tsis yog xoom, lub tshuab tau txais lub teeb liab los qhib lub voj voog, uas yog, nws cuam tshuam rau cov hluav taws xob tam sim no. Lub difavtomat teb rau qhov hu ua overcurrents uas tshwm sim thaum overload thiab luv luv Circuit Court, txawm hais tias qee qhov ntawm cov khoom siv no kuj teb rau tam sim no to hauv av, ua haujlwm ntawm automaton thiab relay tib lub sijhawm.

Txij li thaum lub difrele thiab difautomat zoo sib xws, nws yog ib qho nyuaj heev rau cov amateur electrician kom paub qhov txawv lawv - koj yuav tsum paub cov cim. Yog lawm, thiab kev teeb tsa ntawm cov khoom siv uas tuaj yeem tiv thaiv hluav taws thiab, vim li ntawd, ua kom muaj kev nyab xeeb ntawm lub neej thiab kev noj qab haus huv, nws yog qhov zoo dua los tso siab rau cov neeg ua haujlwm tsim nyog.

Cov koog no tau teeb tsa tom qab qhov taw qhia ntsuas hauv lub vaj huam sib luag hluav taws xob ntawm lub tsheb ciav hlau DIN ruaj khov. Ntawm qhov hluav taws xob ntawm 220 V, lawv muaj ob lub terminals ntawm cov tswv yim thiab ob qho ntawm cov zis. Hauv kev lag luam kev lag luam thiab hauv qhov chaw uas qhov hluav taws xob ntawm 380 V tau muab, plaub lub terminals raug teeb tsa ntawm cov tswv yim thiab cov zis. Cov nuances no yuav tsum raug coj mus rau hauv tus account rau kev ua haujlwm zoo ntawm cov khoom siv.