YASKAWA G7 Series Technical Manual page 270

Setting Motor Rated Current
Set the rated current value on the motor nameplate in parameters E2-01 (for motor 1) and E4-01 (for motor 2).
This set value is the electronic thermal base current.
Setting Motor Overload Protection Characteristics
Set the overload protection function in L1-01 according to the applicable motor.
The induction motor's cooling abilities differ according to the speed control range. Consequently, you must
select the electronic thermal protection characteristics to match the applicable motor's tolerance load charac-
teristics.
The following table shows the motor type and tolerance load characteristics.
L1-01
Set
Value
General-purpose
1 motor (standard
motor)
Drive motor
2 (constant torque)
(1:10)
Vector motor
3
(1:100)
-52
6
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Motor Type Tolerance Load Characteristics
Short time 60 s.
3.7 kW max.
5.5 to 15 kW
18.5 kW min.
80% ED or Frame number Max.
30 min. speed of 200 LJ min.
50% ED or 30 min.
Continuous
Rotation speed (%)
Short time 60
Continuous
Rotation speed (%)
Short time 60 s.
Continuous
Rotation speed (%)
Cooling Ability
Rated rotation speed
= 100% speed
Use this motor for
operations using a
commercial power
supply. This motor
construction yields
Frame
number
Max. best cooling effect
speed of
Frame number Max.
200 LJ
speed of 160 MJ to 160 LJ when operating at 50/
min.
Frame number Max.
60 Hz.
speed of 132 MJ
Rated rotation speed
= 100% speed
This motor yields a
cooling effect even
when operating at
low speeds (approx.
Frame number Max.
6 Hz).
speed of 200 LJ min.
Frame number Max. speed
of 160 MJ to 180 LJ
Frame number Max.
speed of 132 MJ
Rated rotation speed
= 100% speed
This motor yields a
cooling effect even
when operating at
Frame number
Max. speed of
extremely low speeds
200 LJ min.
(approx. 0.6Hz).
Frame number Max.
speed of 160 MJ to 180 LJ
Frame number Max.
speed of 132 MJ
Electronic Thermal
Operation (at 100%
Motor Load)
When operating continu-
ously at 50/60Hz or less,
motor overload detection
(OL1) is detected. The
Drive outputs the error
contact, and the motor
coasts to a stop.
Operates continuously at 6
to 50/60Hz.
Operates continuously at
0.6 to 60Hz.