Current Limit For Speed Search - Delta Electronics AC Motor Drive VFD-EL User Manual

Chapter 4 Parameters|
When momentary power loss is detected, the AC motor drive will block its output and then wait
for a specified period of time (determined by Pr.08.07, called Base-Block Time) before
resuming operation. This parameter should be set at a value to ensure that any residual
regeneration voltage from the motor on the output has disappeared before the drive is
activated again.
This parameter also determines the waiting time before resuming operation after External
Baseblock and Auto Restart after Fault (Pr.08.15).
08.08

Current Limit for Speed Search

Settings
Following a momentary power loss, the AC motor drive will start its speed search operation
only if the output current is greater than the value set by Pr.08.08. When the output current is
less than the value of Pr.08.08, the AC motor drive output frequency is at "speed
synchronization point". The drive will start to accelerate or decelerate back to the operating
frequency at which it was running prior to the power loss.
Power
08.05
Input
08.04=1
Output
Frequency
Output
Voltage
08.09 Skip Frequency 1 Upper Limit
08.10 Skip Frequency 1 Lower Limit
08.11 Skip Frequency 2 Upper Limit
08.12 Skip Frequency 2 Lower Limit
08.13 Skip Frequency 3 Upper Limit
08.14 Skip Frequency 3 Lower Limit
Settings
4-80
30 to 200%
Maximum Allowable
Power Loss Time
Speed Search
Baseblock Time
08.06
0.00 to 600.0Hz
08.05
Speed
Synchronization
Detection
08.04=2
Factory Setting: 150
Maximum
Allowable Power
Baseblock Time
08.06
Unit: 0.01
Unit: 0.01
Unit: 0.01
Unit: 0.01
Unit: 0.01
Unit: 0.01
Factory Setting: 0.00
Revision August 2008, 2ELE, V1.02
Unit: 1