Motor Overload Protection - YASKAWA CIMR-G7U Technical Manual



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
Current
E2-01
Motor Rated
FLA
Motor 2 Rated
Current
E4-01
Motor Rated
FLA
Motor Overload
Protection
Selection
L1-01
MOL Fault
Select
Motor Overload
Protection Time
L1-02
MOL Time
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)
Description
Sets the motor nameplate full load
current in amperes (A). This value
is automatically set during Auto-
Tuning.
Sets the motor 2 name plate full
load current in amperes (A). This
value is automatically set during
Auto-Tuning.
Sets the motor thermal overload
protection (OL1) based on the
cooling capacity of the motor.
0: Disabled
1: Standard Fan Cooled
(< 10:1 motor)
2: Standard Blower Cooled
(10:1 motor)
3: Vector Motor
(1000:1 motor)In some
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.
When several motors are con-
nected to one Drive, set to 0 and
ensure that each motor is installed
with a protection device.
Sets the motor thermal overload
protection (OL1) time. A larger
L1-02 time will increase the time
before an OL1 fault will occur.
Function
Change
Setting Factory
during
Range Setting
V/f
Operation
0.32
to 1.90 A
No Q
6.40
*1
*2
0.32
to 1.90 A
No A
6.40
*1
*2
0 to 3 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
51
6-