Ib qho kev tiv thaiv relay yog ib qho khoom siv nyob rau hauv kev sim: nws xav tau DC lub zog rau nws cov khoom siv hluav taws xob, thiab nws cov binary inputs thiab outputs yuav tsum tau wetted nrog qhov tseeb voltage kom mus los thiab kaw cov lus txib yog tiag. Nyob rau hauv lub substation uas voltage los ntawm lub chaw nres tsheb roj teeb (feem ntau 110 V los yog 220 V DC). Nyob rau ntawm lub rooj zaum xeem tsis muaj chaw nres tsheb roj teeb - yog li lub relay xeem teeb yuav tsum hloov nws.
Relay fais fab mov ntawm qhov chaw -ib qho kev sib koom ua ke DC auxiliary output powers lub relay nyob rau hauv kev ntsuam xyuas ncaj qha los ntawm lub xeem teeb, tshem tawm qhov yuav tsum tau nqa ib tug cais lub rooj zaum los yog roj teeb.
110V / 220V DC xaiv -cov zis tau hloov kho tsis tu ncua nyob ib ncig ntawm qhov chaw nres tsheb tus qauv- roj teeb theem, yog li tib qhov kev sim ntsuas relays ntsuas rau 110 V DC thiab 220 V DC (thiab qis dua -voltage logic xws li 24/48 V).
Kev hloov pauv ywj siab -cov auxiliary channel yog galvanically sib cais thiab hloov kho ntawm nws tus kheej ntawm qhov ntsuas tam sim no thiab qhov hluav taws xob, yog li nws tuaj yeem simulate undervoltage ntawm DC cov khoom siv thaum AC ntau npaum li qhov qub - ib qho tseem ceeb rau DC - saib xyuas cov ntsiab lus.
Kev txheeb xyuas qhov tseeb tiag -vim hais tias kev mus ncig / ze circuits yog energized nrog tiag tiag DC, lub xeem teeb pom kev sib cuag tau tiag tiag (xws li arcing thiab bounce) es tsis txhob ntawm ib tug logic - theem kwv yees.