Lenze 8400 - Manual (Page 272)

5 Motor control (MCTRL)
5.13 Braking operation/brake energy management
272
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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Short overview of the relevant parameters:
5.13.1 Setting the voltage source for braking operation
The voltage threshold for braking operation is set via the mains voltage ( C00173 ) and the reduced
brake chopper threshold ( C00174 ). When this "brake chopper threshold" is exceeded, the response
selected in C00175 takes place in the DC bus. The selected function (e.g. use of a brake resistor)
serves to dissipate energy in the DC bus and reduce the DC-bus voltage.
• The "brake chopper threshold" is preset as follows so that it is higher than the specified mains
voltage ( C00173 ):
• This brake chopper threshold can be reduced by 0 ... 150 V by means of C00174 .
Parameter Info Lenze setting
Value Unit
C00173 Mains voltage 3ph 400 V / 1ph 230 V
C00175 Brake energy management R_Brake (brake resistance)
Brake resistor
C00133 Brake resistor utilisation - %
C00129 Brake resistance value 39.0 Ohm
C00130 Rated brake resistor power 100 W
C00131 Thermal capacity - brake resistor 10.0 kWs
C00174 Reduced brake chopper threshold 0 V
C00572 Threshold - brake resist. overload 100 %
C00574 Resp. to brake resist. overtemp. No response
Inverter motor brake
C00987 Inverter motor brake: nAdd 80 rpm
C00988 Inverter motor brake: PT1 filter time 0.0 ms
Highlighted in grey = display parameter
Mains voltage Brake chopper threshold
C00173 1-phase 3-phase 1-phase 3-phase
0 1ph 230V 3ph 400V DC380V DC725V
1 1ph 230V 3ph 440V DC380V DC735V
2 1ph 230V 3ph 480V DC380V DC775V
3 1ph 230V 3ph 500V DC380V DC790V

Stop!
The brake chopper threshold resulting from C00173 and C00174 must not exceed the
stabilised DC-bus voltage!