ASFIFF12 High Speed
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715
Underload protection, zero frequency load
(2.7.19)
The torque limit can be set between 5.0—150.0 % x TnMotor.
This parameter gives value for the minimum torque allowed with zero frequency. See
Figure 5-22.
If you change the value of parameter
(Motor nominal current) this parameter is
automatically restored to the default value. See chapter 6.5.
716 Underload
time
(2.7.20)
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
). If the drive
is stopped the underload counter is reset to zero. See Figure 5-23 and chapter 6.5.
Figure 5-23. Underload time counter function
717
Automatic restart: Wait time
(2.8.1)
Defines the time before the frequency converter tries to automatically restart the motor
after the fault has disappeared.
718
Automatic restart: Trial time
(2.8.2)
The Automatic restart function restarts the frequency converter when the faults selected
with parameters
to ID725 have disappeared and the waiting time has elapsed.
Par. ID716
NX12k66
Trip area
Time
Underload time counter
Underload
No underl.
Trip/warning
par. ID713