Delta Electronics Network Device VFD-S User Manual page 118

8-15 Automatic Voltage Regulation (AVR)
Settings
AVR function automatically regulates the AC drive output voltage to the Maximum Output
Voltage (Pr.1-02). For instance, if Pr.1-02 is set at 200 VAC and the input voltage is at 200V
to 264VAC, then the Maximum Output Voltage will automatically be reduced to a maximum of
200 VAC.
Without AVR function, the Maximum Output Voltage may vary between 180V to 264VAC, due
to the input voltage varying between 180V to 264 VAC.
Selecting program value d2 enables the AVR function and also disables the AVR function
during deceleration. This offers a quicker deceleration.
Software Brake Level
8-16
Settings
During deceleration, the DC-bus voltage will increase due to motor regeneration. When DC
bus voltage level exceeds the Software Brake Level, the DC brake output pins (B1, B2) will be
activated.
Lower Bound of DC Brake Start-up Frequency
8-17
Settings
The setting frequency is lower than Pr.8-17, the DC Brake will not be activated when stops.
Revision August 2008, SE09, SW V2.61
d0 AVR function enabled
d1 AVR function disabled
d2 AVR function disabled when deceleration
230V series: d350 to d450V
460V series: d700to d900V
d0.0 to d400 Hz
Chapter 5 Parameters|VFD-S Series
Factory Setting: d0
Factory Setting: d380
Factory Setting: d760
Factory Setting: d0.0
Unit: 1
Unit: 0.1
5-61