ABB ACSM1 - Braking Chopper

Drive control and features
45
SUPPLVOLTAUTO-ID; the user can define the voltage manually at parameter 47.04
SUPPLY VOLTAGE.
The intermediate DC circuit is charged over an internal resistor which is bypassed
when the correct level (80% of UDC) is reached and voltage is stabilised.
Braking chopper
The built-in braking chopper of the drive can be used to handle the energy generated
by a decelerating motor.
When the braking chopper is enabled and a resistor connected, the chopper will start
conducting when the DC link voltage of the drive reaches 780 V. The maximum
braking power is achieved at 840 V.
1.07 DC-VOLTAGE
Undervoltage control level (0.74 × U
DC
)
Undervoltage trip level (0.65 × U
DC
)
Overvoltage control level (1.50 × U
DC
)
Overvoltage trip level (1.63 × U
DC
)
50 V min
U
DC
(1.35 × 1.19 USED SUPPLY VOLT)