Delta VFD-L-I Series, Руководство пользователя

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Chapter 4 Parameters
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VFD-L-I Series
4-36 Revision July 2009, SW V1.1
Group 6: Protection Parameters
06-00
Over-Voltage Stall Prevention Level
Unit: 1
Settings 350 to 410V (0: disable) Factory Setting: 390
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
brake resistors should be used or the deceleration time should be increased.
Time
Time
O ver -vo lta ge stal l p re ven tio n fu ncti on
O utp ut fr eq ue ncy
O ver -vo lta ge
d ete ctio n l eve l
DC B US vo lta ge
06-01
Over-Current Stall Prevention Level
Unit: 1
Settings 20 to 200% (0: disable) Factory Setting: 170
A setting of 100% is equal to the Rated Output Current of the drive.
During acceleration and steady-state operation, the AC drive output current may increase
abruptly to 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 decrease output frequency to
prevent stall. The AC drive will only resume acceleration when the current drops below the
level specified by Pr. 06-01.