ABB ACS560 - Page 313

Parameters 313
43.07 Brake chopper
runtime enable
Selects the source for quick brake chopper on/off control.
0 = Brake chopper IGBT pulses are cut off
1 = Normal brake chopper IGBT modulation allowed.
This parameter can be used to enable chopper operation only
when the supply is missing from a drive with a regenerative
supply unit.
On
Off 0. 0
On 1. 1
Other [bit] Source selection (see Terms and abbreviations on page 162). -
43.08 Brake resistor
thermal tc
Defines the thermal time constant for the brake resistor
thermal model.
0 s
0…10000 s Brake resistor thermal time constant, ie the rated time to
achieve 63% temperature.
1 = 1 s
43.09 Brake resistor
Pmax cont
Defines the maximum continuous load of the brake resistor
that will eventually raise the resistor temperature to the
maximum allowed value (= continuous heat dissipation
capacity of the resistor in kW) but not above it. The value is
used in the resistor overload protection based on the thermal
model. See parameter 43.06 Brake chopper enable and the
data sheet of the brake resistor used.
0.00 kW
0.00…
10000.00 kW
Maximum continuous load of the brake resistor. 1 = 1 kW
43.10 Brake resistance Defines the resistance value of the brake resistor. The value
is used for the brake resistor protection based on the thermal
model. See parameter 43.06 Brake chopper enable.
0.0 ohm
0.0…1000.0 ohm Brake resistor resistance value. 1 = 1 ohm
43.11 Brake resistor fault
limit
Selects the fault limit for the brake resistor protection based
on the thermal model. See parameter 43.06 Brake chopper
enable. When the limit is exceeded, the drive trips on fault
7183 BR excess temperature.
The value is given in percent of the temperature the resistor
reaches when loaded with the power defined by parameter
43.09 Brake resistor Pmax cont.
105%
0…150% Brake resistor temperature fault limit. 1 = 1%
43.12 Brake resistor
warning limit
Selects the warning limit for the brake resistor protection
based on the thermal model. See parameter 43.06 Brake
chopper enable. When the limit is exceeded, the drive
generates a A793 BR excess temperature warning.
The value is given in percent of the temperature the resistor
reaches when loaded with the power defined by parameter
43.09 Brake resistor Pmax cont.
95%
0…150% Brake resistor temperature warning limit. 1 = 1%
No. Name/Value Description Def/FbEq16