VFD-B Series
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5-38
Group 6: Protection Parameters
06 - 00
Over-Voltage Stall Prevention Factory Setting: 390V
Settings 00 Disable Over-Voltage Stall Prevention
230V series: 330 ~ 410V
460V series: 660 ~ 820V
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 not decelerate
and keep the output frequency until the voltage drops below the preset value.
Note:
With moderate inertial load, the over-voltage stall prevention will not occur and the real
deceleration time should be equal to the setting of deceleration 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 resistor should be used.
Output Frequency
Deceleration characteristic
when Over-Voltage Stall
Prevention enabled
Frequency Held
Time
Deceleration Time
01-10, 01-12, 01-19, 01-21
06 - 01
Over-Current Stall Prevention during Acceleration
Factory Setting: 170
Settings 20 to 250% Unit: 1%
A setting of 100% is equal to the Rated Output Current of the drive.
During acceleration, the AC drive output current may increase abruptly and exceed the
value specified by Pr.06-01 due to rapid acceleration or excessive load on the motor.
When this function is enabled, the AC drive will stop accelerating and keep the output
frequency until the current drops below the maximum value.
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