Lenze i55AE155F

Brake resistor monitoring
The inverter calculates and monitors the thermal load of the brake resistor to ensure that the
brake resistor will not be overloaded.
A correct calculaon required the following sengs according to the data on the nameplate of
the brake resistor:
•
0x2550:002 (P707.02): Resistance value
•
0x2550:003 (P707.03): Rated power
•
0x2550:004 (P707.04): Maximum thermal load
The calculated thermal load is not displayed in 0x2550:007 (P707.07).
The brake resistor monitoring is designed with two stages:
•
If the calculated thermal load exceeds the warning threshold set in 0x2550:008 (P707.08)
(default seng: 90 %), the response set in 0x2550:010 (P707.10) takes place (default set-
ting: "Warning"). The warning status will be reset if the thermal load falls below the warn-
ing threshold - 20 %.
•
If the calculated thermal load exceeds the warning threshold set in 0x2550:009 (P707.09)
(default seng: 100 %), the response set in 0x2550:011 (P707.11) takes place (default set-
ting: "Fault"). The error status will be reset if the thermal load falls below the error thresh-
old - 20 %.
Parameter Name / value range / [default seng] Info
0x2541:006
(P706.06)
Brake energy management: Brake resistor response
(Brake management: Brk. res. behav)
•
Seng can only be changed if the inverter is inhibi-
ted.
Behaviour of the integrated brake chopper if the inverter is disabled and
if the error status is acve.
0 O: disable and error If the inverter is disabled and the error status is acve, the brake chop-
per is switched o.
1 On: disable / o: error Brake chopper is switched o if the error status is acve, but not if the
inverter is disabled.
2 O: disable / on: error Brake chopper is switched o if the inverter is disabled but not if the
error status is acve.
3 On: disable and error Brake chopper is not switched o if the inverter disabled and the error
status is acve.
0x2550:002
(P707.02)
Brake resistor: Resistance value
(Brake resistor: Resistance value)
0.0 ... [180.0]* ... 500.0 Ω
* Default seng depending on the size.
Resistance value of the brake resistor connected.
•
The value to be entered can be obtained from the brake resistor
nameplate.
0x2550:003
(P707.03)
Brake resistor: Rated power
(Brake resistor: Rated power)
0 ... [50]* ... 800000 W
* Default seng depending on the size.
Rated power of the brake resistor connected.
•
The value to be entered can be obtained from the brake resistor
nameplate.
0x2550:004
(P707.04)
Brake resistor: Maximum thermal load
(Brake resistor: Maximum heat)
0.0 ... [8.0]* ... 100000.0 kWs
* Default seng depending on the size.
Thermal capacity of the brake resistor connected.
•
The value to be entered can be obtained from the brake resistor
nameplate.
0x2550:007
(P707.07)
Brake resistor: Thermal load
(Brake resistor: Thermal load)
•
Read only: x.x %
Display of the ulisaon of the brake resistor connected.
0x2550:008
(P707.08)
Brake resistor: Warning threshold
(Brake resistor: Warning thresh.)
50.0 ... [90.0] ... 150.0 %
Warning threshold for brake resistor monitoring.
•
If the ulisaon shown in 0x2541:004 (P706.04) reaches the threshold
set, the response selected in 0x2550:010 (P707.10) is eected.
•
The warning is reset with a hysteresis of 20 %.
0x2550:009
(P707.09)
Brake resistor: Error threshold
(Brake resistor: Error thresh.)
50.0 ... [100.0] ... 150.0 %
Error threshold for brake resistor monitoring.
•
If the ulisaon shown in 0x2541:004 (P706.04) reaches the threshold
set, the response selected in 0x2550:011 (P707.11) is eected.
•
Reseng the error is only possible if the hysteresis is lower than 20 %.
0x2550:010
(P707.10)
Brake resistor: Response to warning
(Brake resistor: Warning resp.)
•
For further possible sengs, see parameter
0x2D45:001 (P310.01). ^ 223
Selecon of the response that is executed when the warning threshold
for brake resistor monitoring is reached.
Associated error code:
•
65334 | 0xFF36 - Brake resistor: overload warning
1 Warning
Addional funcons
Brake energy management
Use of a brake resistor
446