BENSHAW RSi GM2 Series - Inverter Overload Protection; Speed Reference Loss

Learning Protection Features
164
GM2 Series VFD
890054-00-00
Inverter Overload Protection
In addition to motor overload settings, the inverters have built in inverter overload protection.
When the inverter input current exceeds the rated current, a protective function is activated to
prevent damages to the inverter. This inverter overload protection is based on inverse proportional
characteristics.
An inverter overload warning signal (relay output) can be provided before the inverter overload
protection function (IOL) operates. Set OU.31 or OU.33 to 6 (IOL). When the overcurrent time
reaches 60% of the allowed overcurrent time (150%, 1 min), the relay will change state (signal
output at 150%, 36 sec).
Group
Code
Name
Setting
Setting
Range
Unit
OU
31
Multi-function (digital)
relay1 item
6
IOL
-
-
33
Multi-function (digital)
relay2 item
Speed Reference Loss
When setting the operating speed using an analog input, a pulsed input, through
communications option or the keypad, the speed reference loss setting can be used to
select the response of the inverter after the signal loss.
An output relay can be used to provide a signal when the speed reference is lost. Set OU.31 or
OU.33 to 13 (Lost Command).
Group
Code
Name
Setting
Setting
Range
Unit
Pr
12
Motion at reference frequency
loss
1
Free-Run
-
-
13
Time to determine reference
frequency loss
1.0
0.0–120.0
sec
14
Operating frequency at
reference frequency loss
0.00
Start
frequency–
Max.
frequency
Hz
15
Analog input loss decision level
0
Half of x1
-
OU
31
Multi-function (digital) relay1
item
13
Lost
Command
-
-
33
Multi-function (digital) relay2
item