ABB ACS880+N5350 User Manual page 150

Parameter (Number)
Block Title
FAULT TOTAL TRIALS TIME (31.15)
FUNCTIONS
(Continued)
DELAY TIME (31.16)
SUPPLY PHASE LOSS (31.21)
BRAKE CHOPPER
Settings for the internal brake chopper.
BRAKING RESISTOR
TEMPERATURE (43.01)
BRAKE CHOPPER ENABLE
(43.06)
1 (Enabled with thermal model) Brake chopper enabled with resistor overload protection.
3AXD50000011888
Table 12-4 Level 1 Parameter Block Definitions
Selection (Value)
0 (No action) No action taken.
1 (Fault) The drive trips on fault 3130 Input phase loss.
0 (Disabled) Brake chopper control disabled.
2 (Enabled without thermal
model)
Default: 30.0 s
Range: 1.0 - 600.0 s
Defines a time window for automatic fault resets. The maximum
number of attempts made during any period of this length is defined
by 31.14 Number of trials.
Note: If the fault condition remains and cannot be reset, each reset
attempt will generate an event and start a new time window. In
practice, if the specified number of resets (31.14) at specified
intervals (31.16) take longer than the value of 31.15, the drive
will continue to attempt resetting the fault until the cause is
eventually removed.
Default: 0.0 s
Range: 0.0 - 120.0 s
Defines the time that the drive will wait after a fault (or a previous reset
attempt) before attempting an automatic reset. See parameter 31.12
Autoreset selection.
Default: 1 (Fault)
Range: 0, 1
Selects how the drive reacts when a supply phase loss is detected.
Default: Read Only
Range: 0.0 - 120.0%
Displays the estimated temperature of the brake resistor, or how
close the brake resistor is to being too hot.The value is given in
percent where 100% is the temperature the resistor would reach if
the maximum continuous braking power (43.09 Brake resistor Pmax
cont) is applied to the resistor for 100% rated time. The thermal time
constant (43.08 Brake resistor thermal tc) defines the rated time to
achieve 63% temperature. 100% would be reached when 100% time
has elapsed.
Default: 0 (Disabled)
Range: 0 - 2
Brake chopper control enabled without resistor overload protection. This
setting can be used, for example, if the resistor is equipped with a thermal
circuit breaker that is wired to stop the drive if the resistor overheats.
Enables brake chopper control.Note: Before enabling brake chopper
control, ensure that
• a brake resistor is connected
• overvoltage control is switched off (parameter 30.30 Overvoltage
control)
• the supply voltage range (parameter 95.01 Supply voltage) has been
selected correctly.
Descriptions
Startup Assistant & Parameters 12-71