BENSHAW RSi GM2 Series - Overload Trip and Early Warning

Learning Protection Features
156
GM2 Series VFD
890054-00-00
Overload Trip and Early Warning
The inverter provides motor overload protection and will trip on an Overload Fault (OLt) fault
based on amount of current (% motor amps) and time. The inverter responds to an overload fault
based on the setting of parameter Pr.20 (OL Trip Select). Select 1 (Free-Run) or 2 (Dec) to activate
the overload function and to determine the stop method when an overload fault occurs. Either
Relay1 or Relay2 (OU.31 or OU.33) can be set to 5 (Overload) to provide an output signal.
The inverter can also provide an overload warning (OLW) based on the settings of parameters
Pr.17 (OL Warn Select), Pr.18 (OL Warn Level) and PR-19 (OL Warn Time). Set parameter Pr.17 to 1
(Yes) to activate the overload warning function. Set the output current level in parameter Pr.18, set
the time in Pr.19. Either Relay1 or Relay2 (OU.31 or OU.33) can be set to 5 (Overload) to provide an
output warning signal. The inverter does not trip when warning levels are reached.
Group
Code
Name
Setting
Setting
Range
Unit
Pr
04
Load level setting
1
Heavy Duty
-
-
17
Overload warning
selection
1
Yes
0–1
-
18
Overload warning level
110
30–180
%
19
Overload warning time
10.0
0–30
sec
20
Motion at overload
fault
1
Free-Run
-
-
21
Overload fault level
150
30–200
%
22
Overload fault time
60.0
0–60.0
sec
OU
31
Multi-function (digital)
relay1 item
5
Over Load
-
-
33
Multi-function (digital)
relay2 item
Overload Trip and Early Warning Setting Details
Code and
Features
Description
Pr.04 Load
Duty
Select the inverter rated load level.
Configuration
Function
0
Normal
Duty
Used for light loads, like fans and pumps
(overload tolerance: 120% of rated normal
duty rated current for 1 minute).
1
Heavy
Duty
Used for heavy loads, like hoists and
cranes (overload tolerance: 150% of rated
heavy duty current for 1 minute).
Pr.20 OL Trip
Select
Select the inverter protective action in the event of an
overload fault.
Configuration
Function
0
None
No protective action is taken.
1
Free-Run
Inverter output is blocked and the motor
will coast to a stop.
3
Dec
The inverter decelerates the motor to a
stop.