ABB ACS880 - Brake Chopper

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
Settings for the internal brake chopper.Brake chopper43
See also section DC voltage control (page 81).
- / real32Displays the estimated temperature of the brake resistor,
or how close the brake resistor is to being too hot.
Brake resistor
temperature
43.1
The value is given in percent where 100% is the eventual
temperature the resistor would reach when loaded long
enough with its rated maximum load capacity (43.9 Brake
resistor max cont power).
The temperature calculation is based on the values of
parameters 43.08, 43.09 and 43.10, and on the assumption
that the resistor is installed as instructed by the
manufacturer (ie. it cools down as expected).
This parameter is read-only.
1 = 1 % / 1000 = 1 %Estimated brake resistor temperature.0.0 ... 120.0 %
Disabled / uint16Enables brake chopper control and selects the brake
resistor overload protection method (calculation or
measurement).
Brake chopper
function
43.6
Note: Before enabling brake chopper control, ensure that
• A brake resistor is connected,
•
Overvoltage control is switched off (parameter 30.30
Overvoltage control), and
•
The supply voltage range (parameter 95.1 Supply
voltage) has been selected correctly.
0Brake chopper control disabled.Disabled
1Brake chopper control enabled with resistor overload
protection based on a thermal model. If you select this,
Enabled with thermal
model
you must also specify the values needed by the model, ie.
parameters 43.08…43.12. See the resistor data sheet.
2Brake chopper control enabled without resistor overload
protection based on a thermal model. This setting can be
Enabled without
thermal model
used, for example, if the resistor is equipped with a thermal
circuit breaker that is wired to stop the drive if the resistor
overheats.
Before using this setting, ensure that overvoltage control
is switched off (parameter 30.30 Overvoltage control)
392 Parameters