Setting The Voltage Source For Braking Operation - Lenze 8400 StateLine C Reference Manual

Parameter
Brake resistor
C00133
C00129
C00130
C00131
C00174
C00572
C00574
Inverter motor brake
C00987
C00988
Highlighted in grey = display parameter
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
(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):
C00173
0
1
2
3
4
 This brake chopper threshold can be reduced by 0 ... 150 V by means of C00174.

Stop!
The brake chopper threshold resulting from
exceed the stabilised DC-bus voltage!
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
 This means that
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Info
Brake resistor utilisation
Brake resistance value
Rated brake resistor power
Thermal capacity - brake resistor
Reduced brake chopper threshold
Brake resistor overload threshold
Resp. to overtemp. brake resistor
Inverter motor brake: nAdd
Inverter motor brake: PT1 filter time
C00175
Mains voltage
1-phase
1ph 230V
1ph 230V
1ph 230V
1ph 230V
1ph 115V
has been set with the selection "0" for 400 V AC mains.
C00174 can be set to a maximum of 131 V DC (725 V DC - 594 V DC).
L
8400 StateLine C | Reference manual
Braking operation/brake energy management
takes place in the DC bus. The selected function
Brake chopper threshold
3-phase 1-phase
3ph 400V DC380V
3ph 440V DC380V
3ph 480V DC380V
3ph 500V DC380V
3ph 400V DC205V
C00173 and C00174
Motor control (MCTRL)
Lenze setting
Value Unit
- %
39.0 Ohm
100 W
10.0 kWs
0 V
100 %
No response
80 rpm
0.0 ms
3-phase
DC725V
DC735V
DC775V
DC790V
DC725V
must not
225