Delta Electronics AC Motor Drive VFD007S23A - Manual (Page 107)

Chapter 5 Parameters|VFD-S Series
5-52 Revision August 2006, SE08, SW V2.61
Group 6: Protection Parameters
6-00 Over-Voltage Stall Prevention Unit: 0.1
Factory Setting: d1
Settings d0 Disable
d1 Enable
During deceleration, the motor DC bus voltage may exceed its Maximum Allowable Value due
to motor regeneration. When this function is enabled, the AC drive will stop decelerating.
Maintaining a constant output frequency when it happens. The AC drive will only resume
deceleration when the voltage drops below preset value.
NOTE
With a moderate inertial load, the over-voltage during deceleration won’t happen, and the drive will
stop in programmed time. The AC drive will automatically extend the deceleration time with high
inertial loads. If deceleration time is critical for the application, then dynamic braking resistors should
be used.
6-01 Over-Voltage Stall Prevention Level Unit: 1
Settings 230V Series d350 to d410V Factory Setting: 390
460V Series d700 to d820V Factory Setting: 780
During deceleration, the DC bus voltage may exceed its maximum allowable value due to
motor regeneration. When this function is enabled, the AC drive will stop decelerating.
Maintaining a constant output frequency when it happens. The AC drive will resume
deceleration when the voltage drops below preset value.
With a moderate inertial load, the over-voltage during deceleration won’t happen, and the
drive will stop in programmed time. The AC drive will automatically extend the deceleration
time with high inertial loads. If deceleration time is critical for the application, then dynamic
braking resistors should be used.