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Method for reading electrical control circuit diagram of building equipment
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2022-10-11
Method for reading electrical control circuit diagram of building equipment
Theelectricalcontroldiagramisdrawnaccordingtotheprincipleofsimpleandclear,easyreadingandanalysisbythereader.Thepositionofthecomponentsinthedrawingisnotdrawnaccordingtotheactualposition,andonlytherequiredelectricalcomponentsandterminalsaredrawn. Thecircuitdiagramisdividedintotwoparts:amaincircuitandanauxiliarycircuit.Themaincircuitisapartthroughwhichastrongcurrentpassesintheelectricalcontrol,andiscomposedofapowersupplycircuit,aprotectioncircuit,andacontactelement;theauxiliarycircuithasapowersupplycircuit,acontrolcircuit,andaprotectioncircuit,andthecontactorThecoil,therelaycoil,andthemovingcontactandthebreakingcontactelementarecombined.Themaincircuitisgenerallyindicatedbyathicksolidline,andtheauxiliarycircuitisgenerallyindicatedbyathinsolidline.AsshowninFigure5-17,theelectricalcontroldiagramofanelectromechanicalcontrolsystemisdrawnwithathicksolidline,andtheauxiliarycircuitisdrawnwithathinsolidline,whichisconvenientforanalyzingthecircuit. Eachcomponentanddeviceofthecircuitdiagramisrepresentedbyagraphicalsymbolspecifiedbythestate,andatextsymboloritemcodeisindicatednexttothegraphicsymboltoindicatethelevel,positionandtypeoftheelectricalcomponent. Theelectricalcontrolcircuitcanimplementvariouscontrolfunctionssuchasforwardandreverse,sequentialcontrol,timecontrol,andthelike.Thecontrolcircuitisadifferentcombinationofseveralelectricalcomponents,whichconstitutesseveralbasiclinks.Ifyouarefamiliarwiththestructureandprincipleofthebasiclink,anycomplicatedcircuitdiagramwillbesolved.Thebasicpartsofthecommonlyusedcontrolcircuithavethefollowingparts.
2022-10-11
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2022-09-30
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