6
-58
Motor Overload Protection
You can protect the motor from overload using the Inverter's built-in electronic thermal overload relay.
Related Constants
* 1. The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
* 2. The setting range is from 10% to 200% of the Inverter rated output current. The value for a 200 V Class Inverter for 0.4 kW is given.
For the motor no-load current, set E2-03 to a value less than that of E2-01.
* 3. The setting range is from 10% to 200% of the Inverter rated output current. The value for a 200 V Class Inverter for 0.4 kW is given.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
E2-01
Motor rated
current
Sets the motor rated current in 1 A
units.
These set values will become the
reference values for motor protec-
tion, torque limits and torque con-
trol.
This constant is automatically set
during autotuning.
0.32 to
6.40
*2
1.90 A
*1
NoQQQQQ30EH
Motor Rated
FLA
E4-01
Motor 2 rated
current
Sets the motor rated current in 1 A
units.
These set values will become the
reference values for motor protec-
tion, torque limits and torque con-
trol.
This constant is automatically set
during autotuning.
0.32
to
6.40
*3
1.90 A
*1
No A A A A A 321H
Motor Rated
FLA
L1-01
Motor protec-
tion selection
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay.
0: Disabled
1: General-purpose motor
protection
2: Inverter motor protection
3: Vector motor protection
In some applications when the
Inverter power supply is turned
off, the thermal value is reset, so
even if this constant is set to 1,
protection may not be effective.
When several motors are con-
nected to one Inverter, set to 0 and
ensure that each motor is installed
with a protection device.
0 to 3 1 No Q Q Q Q Q 480H
MOL Fault
Select
L1-02
Motor protec-
tion time con-
stant
Sets the electric thermal detection
time in seconds units.
Usually setting is not necessary.
The factory setting is 150% over-
load for one minute.
When the motor's overload resis-
tance is known, also set the over-
load resistance protection time for
when the motor is hot started.
0.1 to
5.0
1.0
min
No A A A A A 481H
MOL Time
Const
TOE-S616-60.1.book 58 ページ ２０１７年８月４日 金曜日 午後３時４１分
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