ID714
ID715
f
5 Hz
Underload area
Torque
Field weakening
point
Fig. 31: Setting of the minimum load
P3.9.17 UNDERLOAD PROTECTION: ZERO FREQUENCY LOAD (ID 715)
Use this parameter to set the minimum torque that the motor needs when the output
frequency of the drive is 0.
P3.9.18 UNDERLOAD PROTECTION: TIME LIMIT (ID 716)
Use this parameter to set the maximum time for an underload state.
You can set the time limit between 2.0 and 600.0 s.
This is the maximum time for an underload status to be active. An internal counter counts
the underload time. If the value of the counter goes above this limit, the protection causes
the drive to trip. The drive trips as is set in parameter P3.9.15 Underload Fault. If the drive
stops, the underload counter goes back to 0.
ID716
Trip area
Time
Underload time counter
Underload•
No underl.
Trip/warning
ID713
Fig. 32: The Underload time counter function
VACON · 158
PARAMETER DESCRIPTIONS
10
TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205
Содержание 100 HVAC
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