Delta VFD-L Series

VFD-L Series
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5-32
Group 6: Protection Parameters
6 - 00
O
ver-Voltage Prevention Level
F
actory Setting: d 390
Settings d 0 Disable Over-Voltage Prevention
d 350 to d 410 Unit: 1 VAC
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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.
DC bus voltage
time
Over-voltage
detection
level
Output
Freq.
time
Over-voltage Stall Prevention
6 - 01
O
ver-Current Prevention Level
Factory Setting: d170
Settings d 0 disable Over-Current Prevention
d 20 to d 200% Unit: 1%
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A setting of 100% is equal to the Rated Output Current of the drive.
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During acceleration, the AC drive output current may increase abruptly to exceed the
value specified by Pr.6-01 due to rapid acceleration or excessive load on the motor.
When this function is enabled, the AC drive will stop accelerating and maintaining a
constant output frequency. The AC drive will only resume acceleration when the current
drops below the maximum value.