Omron 3G3JX

4-30
4-2 Function Mode
4
Functions
Electronic Thermal Level (Motor Protection Level)
(Example) 3G3JX-A2007
Rated current: 4.0 A
Setting range: 0.8 to 4.0A
Electronic Thermal Characteristics
•Frequency characteristics are multiplied by the b012/212 set value above.
•The lower the output frequency is, the lower the cooling capability of the standard motor's self-
cooling fan.
Reduced Torque Characteristics 1
•Multiplied by the time limit characteristics set in b012/212 for each frequency.
Constant Torque Characteristics
•Do not skip this setting when using a constant torque motor.
•Multiplied by the time limit characteristics set in b012/212 for each frequency.
Time before trip (s)
Example where electronic
thermal level is b012 = 5.0 A
Motor current (A)
(Ratio to the rated
current of the Inverter
)
60
4
0
4.6
(116%)
6.0
(150%)
8.0
(200%)
Electronic thermal level
X1.0
X0.8
X0.6
0
520 60
Inverter output
frequency (Hz)
(Example) 3G3JX-A2007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 20 Hz
Trip time (s)
Motor current (A)
(Ratio to the rated current of the Inverter)
60
4
0
3.7
(92.8%)
4.8
(120%)
6.4
(160%)
Electronic thermal level
X1.0
X0.667
0
560
Inverter output
frequency (Hz)
(Example) 3G3JX-A2007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 2.5 Hz
Trip time (s)
Motor current (A)
(Ratio to the rated current of the Inverter)
60
4
0
3.1
(77.4%)
4.0
(100%)
5.32
(133%)