Braking Chopper - ABB ACSM1 Firmware Manual

42
SUPPLVOLTAUTO-ID; the user can define the voltage manually at parameter
SUPPLY
50 V min
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.
Drive control and features
VOLTAGE.
Overvoltage trip level (1.63 × U
Overvoltage control level (1.50 × U
1.07 DC-VOLTAGE
U (1.35 × 1.19 USED SUPPLY
DC
Undervoltage control level (0.74 × U
Undervoltage trip level (0.65 × U
47.04
)
DC
)
DC
VOLT)
)
DC
)
DC