Delta VFD040EL43W User Manual

Chapter 4 Parameters  VFD-EL-W
4-72
 Use this parameter in conjunction with Pr.08.15.
For example: If you set Pr.08.15 to 10 and Pr.08.16 to 600 seconds (10 minutes), and if there is no fault for
over 600 seconds from the restart for the previous fault, then the number of auto-restarts after a fault is reset
to 10.
08.17
Auto-energy Saving
Default: 0
Settings 0 Disable Energy-saving operation
1 Enable Energy-saving operation
 When you set Pr.08.17 to 1, acceleration and deceleration operate at full voltage. During constant speed
operation, the AC motor drive automatically calculates the best voltage value for the power for the current
load. This function is not suitable for constantly changing loads or near-full loads during operation.
08.18
Automatic Voltage Regulation (AVR)
Default: 0
Settings 0 AVR function enabled
1 AVR function disabled
2 AVR function disabled for deceleration
3 AVR function disabled for stop
 The motor rated voltage is usually 230/200 V
AC
50/60 Hz and the AC motor drive input voltage may vary
between 180–264 V
AC
50/60 Hz. Therefore, when you use the AC motor drive without the AVR function, the
output voltage is the same as the input voltage. When the motor runs at voltages exceeding the rated voltage
by 12–20%, the motor’s lifetime is shortened and the motor can be damaged due to higher temperature,
failing insulation and unstable torque output.
 The AVR function automatically regulates the AC motor drive output voltage to the Maximum Output Voltage
(Pr.01.02). For instance, if you set Pr.01.02 to 200 V
AC
and the input voltage is at 200–264 V
AC
, then the
Maximum Output Voltage is automatically reduced to a maximum of 200 V
AC
.
 When the motor ramps to stop, the deceleration time is longer. When setting this parameter to 2 with auto-
acceleration / auto-deceleration, the deceleration is quicker.
08.19
Reserved
08.20
Compensation Coefficient for Motor Instability Unit: 0.1
Settings 0.0–5.0 Default: 0.0
 The drift current occurs in a specific zone of the motor and it causes serious motor vibration. It is
recommended to use this parameter (the recommended value is 2.0) to greatly improve this situation. (The
drift current zone for high-power motors is usually in the low frequency area.)
08.21
DC Current Level during Preheating
Settings 0–100% Default: 0

Delta VFD040EL43W Specifications

General

Brand	Delta
Model	VFD040EL43W
Category	DC Drives
Language	English