ABB ACSM1 - Group 48 BRAKE CHOPPER

Parameters and firmware blocks
203
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 FW block: BRAKE CHOPPER (see above)
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 47.01 OVERVOLTAGE CTRL). The drive has a built-in
braking chopper.
(0) Disable Braking chopper control disabled.
(1) EnableTherm Enable the braking chopper control with resistor overload protection.
(2) Enable 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.
48.02 BC RUN-TIME ENA FW block: BRAKE CHOPPER (see above)
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 FW block: BRAKE CHOPPER (see above)
Defines the thermal time constant of the braking resistor for overload protection.
0…10000 s Braking resistor thermal time constant.
48.04 BR POWER MAX CNT FW block: BRAKE CHOPPER (see above)
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 Maximum continuous braking power.
BRAKE CHOPPER
35
TLF10 2 msec (11)
48.01 BC ENABLE
[ Disable ]
< 48.02 BC RUN-TIME ENA
[ TRUE ]
48.03 BRTHERMTIMECONST
[ 0 s ]
48.04 BR POWER MAX CNT
[ 0.0000 kW ]
48.05 R BR
[ 0.0000 Ohm ]
48.06 BR TEMP FAULTLIM
[ 105 % ]
48.07 BR TEMP ALARMLIM
[ 95 % ]