Inovance MD500 Series - Load Lost Protection

6. Description of Parameters
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6
Function Code Parameter Name Setting Range Default
F9-59
Power dip ride-through
function selection
0: Disabled
1: Bus voltage constant control
2: Decelerate to stop
0
F9-60
Threshold of power dip ride-
through function disabled
85% to 120% 85%
F9-61
Judging time of bus voltage
recovering from power dip
0.1s to 10.0s 0.5s
F9-62
Threshold of power dip ride-
through function enabled
60% to 85% (standard bus voltage) 80.0%
F9-71
Power dip ride-through gain
Kp
0 to 100 40
F9-72
Power dip ride-through
integral coefcient
0 to 100 30
F9-73
Deceleration time of power
dip ride-through
0.0s to 300.0s 20.0s
Note
● In bus voltage constant control, when line voltage recovers, the AC drive
accelerates to target frequency.
● In deceleration to stop mode, when line voltage recovers, the AC drive continues
to decelerate to 0 Hz and stops. The AC drive will not be started until it receives
RUN command again.
6.6.7 Load Lost Protection
Function Code Parameter Name Setting Range Default
F9-63
Load lost protection 0: Disabled
1: Enabled
0
F9-64
Load lost detection level 0.0% to 100.0% (rated motor current) 10.0%
F9-65
Load lost detection time 0.0s to 60.0s 1.0s
These function parameters dene the load lost protection function.
When output current of the AC drive falls below detection level (F9-64) for longer than time set in
F9-65, the AC drive automatically reduces output frequency to 7% of rated frequency. Once load
recovers during protection, the AC drive accelerates to frequency reference.