Theem poob thiab theem kev tiv thaiv relays yog cov khoom siv hauv kev lag luam automation tswj tshuab rau peb -theem circuits.
Qhov kev poob qis thiab kev tiv thaiv ib ntus relay suav nrog cov qauv piv txwv rau peb theem kab sab hauv. Nws yog qhov tshwj xeeb tshaj yog tsim rau cov ntawv thov xws li nyiaj siv ua haujlwm cranes lossis cov cuab yeej siv tshuab uas yuav tsum tau ua ntu ntu ntu thaum lub sijhawm ua haujlwm pem hauv ntej / rov qab. Cov cuab yeej tiv thaiv no muab kev tiv thaiv overvoltage, undervoltage, thiab theem poob kev tiv thaiv nyob rau hauv peb -theem AC circuits, nrog rau theem kev tiv thaiv rau cov khoom uas tsis yog -reversible tsav. Nws nta txhim khu kev qha kev ua tau zoo, dav applicability, thiab yooj yim ntawm kev siv.
Thaum txuas nrog lub hwj chim tswj Circuit Court raws li qhia nyob rau hauv daim duab, no series ntawm protectors tam sim ntawd activates nws tiv thaiv muaj nuj nqi. Thaum lub sij hawm ib txwm ua haujlwm ntawm peb-theem Circuit Court, yog tias ib theem fuse qhib lossis theem tawg tshwm sim nyob rau hauv qis-voltage mov kab, cov khoom siv hluav taws xob sab hauv- tswj los ntawm kev sib xyaw ua ke ntawm cov khoom siv hluav taws xob hluav taws xob hluav taws xob- yuav sai sai. Qhov kev txiav txim no tswj cov kauj ntawm AC contactor, ua rau nws cov neeg sib cuag qhib. Qhov no tiv thaiv 3 × 380V lub zog hluav taws xob hauv hluav taws xob los ntawm kev ncav cuag cov tswj lub cev muaj zog, yog li ua tiav theem tsis ua hauj lwm tiv thaiv kev thauj khoom los ntawm kev ua haujlwm ntawm cov neeg tseem ceeb ntawm AC contactor.
Qhov tseeb, qhov kev poob qis thiab theem kev tiv thaiv relay yog ib qho cuab yeej uas sib xyaw ua ke ntawm kev tiv thaiv theem thiab siv lub relay los nthuav kev tswj ntawm lub kauj ntawm AC contactor. Nws yog lub Hoobkas- nruab nrog lub teeb qhia txog xwm txheej. Feem ntau, lub teeb qhia lub teeb qhia txog kev ua haujlwm ib txwm muaj. Yog hais tias qhov taw qhia lub teeb tsis yog illuminated, nws qhia tau hais tias ib theem poob los yog ib theem ib theem teeb meem.
Thaum thaiv kev tiv thaiv tsis zoo, nco ntsoov tias peb theem kab ntawm tus qauv AC lub zog raug xaiv raws li L1, L2, thiab L3. Cov no yuav tsum tau txuas nrog cov terminals 1, 2, thiab 3 ntawm cov theem poob thiab cov kab ke sib txuas, feem. Yog tias qhov taw qhia lub teeb tsis ci thaum pib xaim, tsuas yog hloov ob theem kab. Thaum wired kom raug, qhov taw qhia lub teeb yuav nyob twj ywm illuminated.
Thaum lub sijhawm ua haujlwm ib txwm muaj, yog tias muaj theem poob tshwm sim lossis cov kab hluav taws xob ntawm ib theem poob qis dua 85%, tus tiv thaiv yuav tsum muaj kev ntseeg siab tsis pub dhau <2 vib nas this.
Tus tiv thaiv theem no tseem tuaj yeem ntes peb -theem voltage tsis txaus. Yog hais tias qhov asymmetry ntawm qhov voltage ntawm ib theem thiab ob theem ua kom txaus siab rau qhov sib npaug hauv qab no, tus neeg tiv thaiv yuav tsum muaj kev ntseeg siab rau hauv <2 vib nas this.
Qhov no theem tsis ua hauj lwm thiab theem ib theem relay nta plaub terminals: 5, 6, 7, thiab 8. Terminals 5 thiab 6 tsim ib txheej ntawm ib txwm qhib kev sib cuag, thaum terminals 7 thiab 8 tsim ib txheej ntawm ib txwm kaw neeg. Feem ntau, terminals 5 thiab 6 yog xaim los tswj lub kauj ntawm AC contactor, thaum lub davhlau ya nyob twg 7 thiab 8 feem ntau yog siv los tswj lub tswb tsis raug, ua haujlwm nkaus xwb raws li lub suab ceeb toom ceeb toom rau cov neeg ua haujlwm.
