gefran TPD32-EV-500 series - Page 248

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thesetlimitsornot.
 I2tMotor •IfMotor I2t ovrldissettoActivity = Ignore, 
thecurrentisreducedfromOverload current parametervalue
to Base currentparametervaluewhenMotor I2t accum=
100%(Overloadcurrent
2
xOverloadtime)
•
IfMotor I2t ovrld issettoActivity = Warning, 
thecurrentismaintainedatOverload currentparametervalue
alsowhenMotor I2t accum=100%(Overloadcurrent
2
x
Overloadtime)
note ! Motor I2t accumisequalto100%if(Overload current
2
xOverload time)isreachedbut
inanycasethelimitmaximumis[(150%FLC)2x60sec]
I2tDrive Thecurrentislimitedto T current lim(+/-)value until
Drive I2t accum=100%i.e.equalto[(150%DeratedDrive
Current
(*)
)
2
x60sec].Whenthisvalueisreached,thedriveis
disabled.
 I2tMotor&Drv ThecurrentislimitedtoT current lim(+/-)valueuntilreaching
Drive I2t accum=100%[(150%DeratedDriveCurrent
(*)
)
2
x
60sec]ifMotor I2t ovrldActivityissettoWarning&Ignore
or,IfsettoDisabledriveuntilreachingMotor I2t accum=
100%(Overloadcurrent
2
xOverloadtime).
   (*)
DeratedDriveCurrent:
 IfusingthedrivewithStandardsizes(Sizeselection=Standard)theDeratedDriveCurrentis
calculatedasfollows:
 •DeratedDriveCurrent=DrivesizexDerating_fact(seetable"Table6.14.6.1:I2tderating"
onpage249).
 IfusingthedrivewithAmericansizes(Sizeselection=American)theDeratedDriveCurrentis
calculatedasfollows:
 •DeratedDriveCurrent=Drivesize.
ThemotoroverloadfunctionisdesignedtoallowthecurrentselectedwithOverload
CurrentforatimeequaltoOverload Time.
 (Iload²-Iovld²)*ts[sec]=((OverCurr/100)²-1²)*IFlc²*(Overloadtime)
 Ic=fullloadcurrent
Themotoroverloadfunctiongivesthepossibilitytohave1.5theOverload current for60sec.
 Ifthethresholdishigherthanthevalueislimitedto:
 (Iload²-IFlc²)*ts[sec]=(1.5²-1²)*IFlc²*60
 TheMotor ovrld preal.isavailableondigitaloutput(code65),itis1withMotor I2t
accum=90%and0whenMotor I2t accum=0.
 TheOverld available signalisavailableondigitaloutput(code6),itis0withMotor
I2t accum=100%and1withMotor I2t accum0.
 TheDrive ovrld preal.isavailableondigitaloutput(code66),itis1withDrive I2t
accum=90%and0whenDrive I2t accum=0.
 TheOverld available signalisavailableondigitaloutput(code67),itis0withDrive
I2t accum=100%and1withDrive I2t accum0.