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Motor Overload Protection
You can protect the motor from overload using the Drive's built-in electronic thermal overload relay.
Related Parameters
Name
Parameter
Number
Display
Motor Rated
Sets the motor nameplate full load
Current
current in amperes (A). This value
E2-01
is automatically set during Auto-
Motor Rated
Tuning.
FLA
Motor 2 Rated
Sets the motor 2 name plate full
Current
load current in amperes (A). This
E4-01
value is automatically set during
Motor Rated
Auto-Tuning.
FLA
Motor Overload
Sets the motor thermal overload
Protection
protection (OL1) based on the
Selection
cooling capacity of the motor.
0: Disabled
1: Standard Fan Cooled
(< 10:1 motor)
2: Standard Blower Cooled
3: Vector Motor
L1-01
MOL Fault
Select
When several motors are con-
nected to one Drive, set to 0 and
ensure that each motor is installed
with a protection device.
Motor Overload
Sets the motor thermal overload
Protection Time
protection (OL1) time. A larger
L1-02
L1-02 time will increase the time
MOL Time
before an OL1 fault will occur.
Const
* 1. Factory settings will vary based on drive capacity (values given here are for 200-240V class, 0.4kW).
* 2. Setting range is 10% to 200% of the drive's rated output current (values given here are for 200-240V class, 0.4kW).
Multi-Function Outputs (H2-01 to H2-05)
Setting
Value
Motor overload (OL1, including OH3) pre-alarm (ON: 90% or more of the detection
1F
level)
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Setting
Description
Range
0.32
6.40
0.32
6.40
(≤10:1 motor)
(≤1000:1 motor)In some
0 to 3
applications when the Drive
power supply is turned off, the
thermal value is reset, so even
if this parameter is set to 1,
protection may not be
effective.
Function
Change
Factory
during
Setting
V/f
Operation
to
1.90 A
No
Q
*1
*2
to
1.90 A
No
A
*1
*2
1
No
Q
0.1
to
1.0 min
No
A
5.0
V/f
Yes
Machine Protection
Control Methods
Open
Open
V/f
Loop
Flux
Loop
with
Vector
Vector
Vector
PG
1
2
Q
Q
Q
Q
A
A
A
A
Q
Q
Q
Q
A
A
A
A
Control Methods
Open
Open
V/f
Loop
Flux
Loop
with
Vector
Vector
Vector
PG
1
2
Yes
Yes
Yes
Yes
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Troubleshooting
