Figure 9-22: Setting Of Minimum Load; Figure 9-23: Underload Time Counter Function - Eaton SLX9000 User Manual

SLX9000 Adjustable Frequency Drives User Manual
2.7.17 Underload protection, zero frequency load ID715
2.7.18 Underload time
9-30
Par. ID714
Par. ID715

Figure 9-22: Setting of Minimum Load

The torque limit can be set between 5.0 and 150.0% x T
This parameter gives value for the minimum torque allowed with zero frequency.
See Figure 9-22.
If you change the value of parameter 2.1.9 (Motor nominal current), this parameter is
automatically restored to the default value.
This time can be set between 2.0 and 600.0 s.
This is the maximum time allowed for an underload state to exist. An internal up/
down counter counts the accumulated underload time. If the underload counter
value goes above this limit the protection will cause a trip according to parameter
2.7.15). If the drive is stopped, the underload counter is reset to zero. See Figure 9-23.
Par. ID716
Underload
No Underload

Figure 9-23: Underload Time Counter Function

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Torque
Underload Area
5 Hz Field Weakening
Point Par. ID602
ID716
Underload
Time Counter
Trip Area
f
.
nMotor
Trip/ Warning
Par. ID713
Time
January 2009
MN04003020E