BENSHAW RSi GM2 Series, Instruction Manual

Page: 184 / 282

Learning Protection Features
174
GM2 Series VFD
890054-00-00
No Motor Trip
The inverter can detect a low motor current condition and will trip on a “no motor trip” fault (nmt )
if the inverter output current is below the Pr.32 detection level for the Pr.33 detection time. The
inverter responds to a no motor trip condition when Pr.31 (No Motor detection) is set to (1) Free-
Run. Pr.31 may be set to (0) None (default) for testing with no motor connected.
Group Code Name Setting Setting Range Unit
Pr 31 No motor motion at
detection
0 None 0 – 1 -
1 Free-run - -
32
No motor detection
current level
5 1 – 100 %
33 No motor detection time 3.0 0.1 – 10 sec
No Motor Trip Setting Details
Code and
Features
Description
Pr.31 No Motor
Detection
0: None
→
No action.
1: Free-Run
→
Activates trip based on Pr.32 and Pr.33 settings.
Inverter will coast to a stop.
Pr.32 No Motor
Level,
Pr.33 No Motor
Time
If the output current [based on the motor rated current (bA.13)] is
lower than the value set at Pr.32 (No Motor Level), and if this
continues for the time set at Pr.
33 (No Motor Time), a ‘no motor trip’
occurs.
If bA.07 (V/F Pattern) is set to 1 (Square), a ‘no motor trip’ may occur due to lower output
current. If so, set Pr.32 (No Motor Level) to a lower value than the factory default.
Low Voltage Trip 2
When Pr.82 (LV2 Selection) is set to Yes (1) and when a low voltage condition occurs, the inverter
will trip and display the
Lu2 fault. When the voltage recovers, the Lu2 trip will not automatically
clear. A fault reset of the inverter is required. The fault history will not be saved.
Group Code Name Setting Setting Range Unit
Pr 82 LV2 Selection Yes (1) 0/1 -