Voltage Ctrl; Brake Chopper - ABB ACS850 Manual

No. Name/Value
00.0... 1000.0%
45.09 Energy reset
Done
Reset
47

47 Voltage ctrl

47.01 Overvolt ctrl
Disable
Enable
47.02 Undervolt ctrl
Disable
Enable
47.03 SupplyVoltAutoId
Disable
Enable
47.04 Supply voltage
0 ... 1000 V
48

48 Brake chopper

48.01 Bc enable
Disable
EnableTherm
Enable
Description
Motor power in percent of nominal motor power.
Resets the energy counters
Saved amount and 01.37 Saved
Reset not requested (normal operation).
Reset energy counters. The value reverts automatically to
Done.
Overvoltage and undervoltage control settings. See also
section DC voltage control
Enables the overvoltage control of the intermediate DC link.
Fast braking of a high inertia load causes the voltage to rise
to the overvoltage control limit. To prevent the DC voltage
from exceeding the limit, the overvoltage controller
automatically decreases the braking torque.
Note: If a brake chopper and resistor or a regenerative supply
section are included in the drive, the controller must be
disabled.
Overvoltage control disabled.
Overvoltage control enabled.
Enables the undervoltage control of the intermediate DC link.
If the DC voltage drops due to input power cut off, the
undervoltage controller will automatically decrease the motor
torque in order to keep the voltage above the lower limit. By
decreasing the motor torque, the inertia of the load will cause
regeneration back to the drive, keeping the DC link charged
and preventing an undervoltage trip until the motor coasts to
stop. This will act as a power-loss ride-through functionality in
systems with high inertia, such as a centrifuge or a fan.
Undervoltage control disabled.
Undervoltage control enabled.
Enables the auto-identification of the supply voltage.
Auto-identification of supply voltage disabled.
Auto-identification of supply voltage enabled.
Defines the nominal supply voltage. Used if auto-identification
of the supply voltage is not enabled by parameter
SupplyVoltAutoId.
Nominal supply voltage.
Control of the brake chopper.
Enables the brake chopper control.
Note: Before enabling the brake chopper control, ensure that
a brake resistor is connected and the overvoltage control is
switched off (parameter
Brake chopper control disabled.
Brake chopper control enabled with resistor overload
protection.
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.
01.35 Saved energy,
CO2.
on page 77.
47.01 Overvolt ctrl).
Parameters 231
FbEq
1 = 1
01.36
0
1
0
1
0
1
0
1
47.03
10 = 1 V
0
1
2