BENSHAW RSi H2 Series - No Motor Trip

Parameter Descriptions
200
890053-00-02
PRT-26
UL Warn Time
A protective function operates when under load level condition explained
above is maintained for the warning time set.
PRT-27
UL Trip Sel
Sets the inverter operation mode for situations when an under-load trip
occurs. If set to ‘1 (Free-Run)’, the output is blocked in an under-load fault
event. If set to ‘2 (Dec)’, the inverter decelerates the motor and stops when an
under-load fault occurs.
PRT-28
UL Trip Time
A protective function operates when under load level conditions explained
above are maintained for the trip time set.
5.8.7 PRT-31 No Motor Trip
The inverter can detect a low motor current condition and will trip on “No Motor trip” if the output
current is below the PRT-32 detection level for the PRT-33 detection time. The inverter responds
to a no motor trip condition when PRT-31 (No Motor detection) is set to ‘1 (Free-Run)’. PRT-31
may be set to (0) None (default) for testing with no motor connected.
Group
Code
Name
LCD Display
Parameter Setting
Setting range
Unit
PRT
31
Operation for no
motor trip
No Motor Trip
0
None
0
None
-
1
Free-Run
32
No motor trip
current level
No Motor Level
5
1–100
%
33
No motor
detection time
No Motor Time
3.0
0.1–10
sec
No Motor Trip Setting Details
Code
Description
PRT-32
No Motor Level
PRT-33
No Motor Time
If the output current value [based on the rated current (MOT-05)] is
lower than the value set at PRT-32 (No Motor Level), and if this
continues for the time set at PRT-33 (No Motor Time), a ‘no motor trip’
occurs.
If BAS-07 (V/F Pattern) is set to ‘1 (Square)’, set PRT-32 (No Motor Level) to a value lower than the
factory default. Otherwise, a ‘no motor trip,’ may occur due to a lack of output current
To operate under load trip properly, a load tuning (AP2-01 Load Tune) must be performed in
advance. If you cannot perform a load tuning, manually set the load fit frequencies (AP2-02 Load Fit
Lfreq–AP2-10 Load Fit Hfreq). The Under Load protection does not operate while the Energy Save
function is in operation.