Delta Electronics VFD-L Series Especificações descarregar pdf (Página 38)

VFD-M Series

5-12

Pr.34

Base-Block Time for Speed Search Factory Setting: 0.5 sec

Settings 0.3 to 5.0 sec Unit: 0.1sec

 When a momentary power loss is detected, the AC drive will stop its output and will wait

during a specified time interval called Base Block (entered in Pr.34) before resuming

operation. Setting of this parameter should make the residual output voltage due to

regeneration almost zero, before the drive resumes operation.

 This parameter also determines the search time when performing external Base-Block

and Fault Reset (Pr.72).

Pr.35

Maximum Current Level for Speed Search Factory Setting: 150

Settings 30 to 200% Unit: 1%

 Following a power failure, the AC drive will start its speed search operation only if the

output current is greater than the value determined by Pr.35. When the output current is

less than that of Pr.35, the AC drive output frequency is at a “speed synchronization

point” and will accelerate or decelerate back to the operating frequency at which it was

running prior to the power failure.

Input

Power

Allowable Max. Power Loss Time

Output

Power

Output

Voltage

Pr.33

Speed search starts with

the Master Frequency

Pr.32=1

Baseblock

Time

Pr.34

speed synchronization

detection

speed search

Allowable Max. power loss time

Pr.33

Speed search starts with

minimum output frequency

Pr.32=2

Baseblock

Time

Pr.34

Pr.36

Upper Bound of Output Frequency Factory Setting: 400

Settings 0.10 Hz to 400.0 Hz Unit: 0.1Hz

 The Upper/Lower Bounds help prevent operation error and machine damage.

 If the Upper Bound of Output Frequency is 50Hz and the Maximum Output Frequency is

60Hz, the Maximum Output Frequency will be limited to 50Hz.

 Setting of this parameter must be equal to or greater than the Lower Bound of Output

Frequency (Pr.37).

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