Nederman HV Control Panel EX Series - Y;D Timer Relay Setting; PTC Sensor Integration

HV Control PanelEN
14
Power supplies Motor
230V50Hz MotorvoltageStar/DeltaY400V/D230V
230/460V60Hz MotortypeIEC-3-12-YY/DD-Y/D
460V60Hz Special12LeadmotorisUsed.Y-Start/D–RUN
220V60Hz Samemotorisusedasto460VYY-Start/DD–Run.Aseparatedocumentisneededtoconnectthismotor.
5.4.9 Y/D Timer Relay Seng (K4T)
ByusingaY/Dstarter,themotorstartcurrentisreducedto30%ofaDOLstartedmotor.In
addion,themotorstarttorqueisreducedto25%ofaDOLstartedmotor.
DOL=DirectOnLine
Applicaonswithaloadtorquehigherthan50%ofthemotorratedtorquewillnotbeable
tostartusingthestar-deltastarter.
InVAC/RBUunits,startupvalvesreducethestarttorqueneededtostartthemotors.
TheY/Dstartercontainsthreecontactorsandamerrelaythatcontrolsthecontactor
acvaonsequence.
Defaultstartmeis15seconds.
1m=60s,Desiredstartme=15s,->15s/60=0,25
Atoolongmotorstartmeheatsupthemotor.Ifthemotorstartmeistooshort,then
themotorwillnotreachitsupperrpmandcausehighcurrentpulseswhenitswitchesover
toDeltarunmode.
Table5-7:Y/DTimerRelayK4TSengs
Default Minutes Switch Default Turn 0-1,0 Custom desired start me
1m 0,25
CustomMinutesSwitch CustomTurn0-1,0
m s
5.4.10 PTC sensor
IfthecabinetisequippedwithPTCsensorrelay(F8),thecontrolsystemwillnotacceptthat
thesensorrelayinputhasanopencircuit.
IftheVAC/RBUelectricalmotorhasabuilt-inPTCsensor,itisrecommendedthatitbe
connectedtothecontrolsystem.
IftheVAC/RBUelectricalmotordoesnothaveaPTCsensor,itisnecessarytoplugina
resistoratterminalX1:139andX1:140tosimulateaPTCresistor.Anappropriateresistor
valueis1000Ohm.
OverloadrelayandthePTCrelaysharethesamealarm.
PTCrelayautoresetswhenpoweriso.
WhenthePTCrelayistriggeredbyhightemperatureinthemotor,thesystemshutso
andwhenturningothepowertoopenthedoor,thereisnosignthattherelayhasbeen
triggered.Motoroverloadrelayshallbemanuallyreset.
Soaeranalarm,andopeningthedoor,ifthemotoroverloadrelayisnottripped,itwould
bethePTCthathascausedthealarm.