Brake Chopper - ABB ACSM1 Firmware Manual

170
Group

48 BRAKE CHOPPER

Configuration of an internal braking chopper.
48
Firmware block:
BRAKE CHOPPER
(48)
This block configures the braking
chopper control and supervision.
48.01 BC ENABLE
Enables the braking chopper control.
Note: Before enabling the braking chopper control, ensure the braking resistor is installed and the
overvoltage control is switched off (parameter
braking chopper.
(0) Disable
(1) EnableTherm
(2) Enable
48.02 BC RUN-TIME ENA
Selects the source for the quick run-time braking chopper control.
0 = Braking chopper operation is prevented. In other words, although the braking chopper has been
enabled with parameter 48.01 and DC voltage rises over the activation level, the braking chopper
remains inactive.
1 = Braking chopper is always active, ie, the braking chopper starts switching, if the DC voltage
reaches the activation level (even if the drive is not running).
This parameter can be used for programming the chopper control to function only when the drive is
operating in the generating mode. By default this parameter is connected to parameter 06.01 STATUS
WORD1 bit3 (RUNNING).
Bit pointer: Group, index and bit
48.03 BRTHERMTIMECONST
Defines the thermal time constant of the braking resistor for overload protection.
0...10000 s
48.04 BR POWER MAX CNT
Defines the maximum continuous braking power which will raise the resistor temperature to the
maximum allowed value. The value is used in the overload protection.
0...10000 kW
Parameters and firmware blocks
BRAKE CHOPPER
FW block: BRAKE CHOPPER
47.01 OVERVOLTAGE
Braking chopper control disabled.
Enable the braking chopper control with resistor overload protection.
Enable the braking chopper control 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.
FW block: BRAKE CHOPPER
FW block: BRAKE CHOPPER
Braking resistor thermal time constant.
FW block: BRAKE CHOPPER
Maximum continuous braking power.
(see above)
CTRL). The drive has a built-in
(see above)
(see above)
(see above)