Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 225
8400 StateLine C | Reference manual
Motor control (MCTRL)
Braking operation/brake energy management
5.11.1 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
.
Example:
A 400 V device has a maximum mains voltage of 420 V AC.
– Maximum stationary DC-bus voltage: 420 V AC * 1.414 = 594 V DC
– C00173
has been set with the selection "0" for 400 V AC mains.
This means that C00174
can be set to a maximum of 131 V DC (725 V DC - 594 V DC).
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
Brake resistor overload threshold 100 %
C00574
Resp. to overtemp. brake resistor No response
Inverter motor brake
C00987
Inverter motor brake: nAdd 80 rpm
C00988
Inverter motor brake: PT1 filter time 0.0 ms
Parameter Info Lenze setting
Value Unit
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
4 1ph 115V 3ph 400V DC205V DC725V
Stop!
The brake chopper threshold resulting from C00173 and C00174 must not
exceed the stabilised DC-bus voltage!
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