Honeywell HVAC400x Applications Manual page 131

A
ID714
ID715
A. Torque.
B. Underload area.
P3.9.17 UNDERLOAD PROTECTION: ZERO FREQUENCY LOAD (ID 715)
You can 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)
You can 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.
B
5 Hz
Fig. 31. Setting of the minimum load
HVAC400X – APPLICATION MANUAL
C
Legend
C. Field weakening point.
131
f
EN2B-0417GE51 R0719