Lenze DSD - Manual (Page 481)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
481
18 Drive dimensioning messages
18.12 Brake resistor
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
18.12 Brake resistor
18.12.1 Resulting brake resistance too low
18.12.2 Permanent utilisation of the equivalent resistance > 100 %
18.12.3 Max. utilisation of the equivalent resistance is >100 %
Warning!
The resulting equivalent resistance is xxx Ohm. Thus the value falls below the minimum permissible brake
resistance on the brake transistor of yyy Ohm.
Cause Effects Possible remedies
The value falls below the minimum
permissible resistance.
The brake chopper or brake module is
overloaded.
• Use different resistor.
• Select different resistor intercon-
nection.
• Increase number of brake chop-
pers/brake modules.
 Brake resistor selection ( 368)
Warning!
The permanent utilisation of the equivalent resistance is xxx %.
Thus the limit value of 100 % is exceeded.
Cause Effects Possible remedies
The resistor is overloaded with re-
gard to the peak braking power.
The inverter indicates overvoltage.
Drive moves in an uncontrolled way!
• Use different resistor.
• Use different resistor intercon-
nection (series connection).
 Brake resistor selection ( 368)
Warning!
The max. utilisation of the equivalent resistance is xxx %.
Thus the limit value of 100 % is exceeded.
Cause Effects Possible remedies
The required peak braking power is
too high.
The brake resistor is overheated.
Fire hazard!
• Select longer braking times.
• Use resistor with higher peak
braking power.
• Connect several brake resistor so
that a higher peak braking power
is possible.