Delta VFD-EL-W Series User Manual

Chapter 4 Parameters｜VFD-EL-W
140

10.24
Deviation Level of Liquid Leakage
Default: 0
Settings
0–50%
 This parameter is based on the PID set point. When the drive does not run and is in a constant
pressure status, and if the deviation is higher than Pr.10.24 due to liquid leakage (minor
pressure loss), the AC motor drive starts to run.
 Use this parameter to avoid the drive frequent start-up and stop due to liquid leakage (minor
pressure loss).
Liquid Leakage Deviation Level Detection

10.25
Liquid Leakage Change Detection
Default: 0
Settings
0: Disable
0–100%

10.26
Liquid Leakage Change Detection Time
Default: 0.5
Settings
0: Disable
0.1–10.0 sec.
 Pr.10.25 and Pr.10.26 define the variation of the feedback value within a time unit in the case of
liquid leakage (minor pressure loss).
 Pr.10.25 sets the variation of the feedback value based on the PID set point; Pr.10.26 is the
setting value within a time unit. If the variation of the feedback value is less than the settings for
Pr.10.25 and Pr.10.26, the liquid leakage occurs. When the drive does not run and is in a
constant pressure status, and if the variation of the feedback value is higher than the settings for
Pr.10.25 and Pr.10.26, the AC motor drive starts to run in order to keep the system stable.
 Liquid Leakage/ Usage Deviation Level Detection
set point
feedback value
10.25
10.26
 Example:
If the set point of constant pressure control of a pump is 4 kg, Pr.10.22 is set to 5%, Pr.10.23 is
set to 15 seconds, Pr.10.24 is set to 25%, Pr.10.25 is set to 3% and Pr.10.26 is set to 0.5

Delta VFD-EL-W Series Specifications

General

Brand	Delta
Model	VFD-EL-W Series
Category	DC Drives
Language	English