Electronic Thermal Level (Motor Protection Level); Electronic Thermal Characteristics - Omron 3G3JX User Manual

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.
Electronic thermal level
X1.0
X0.8
X0.6
0 5 20 60
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.
Electronic thermal level
X1.0
X0.667
0 5 60
Time before trip (s)
Example where electronic
thermal level is b012 = 5.0 A
60
4
Motor current (A)
0
(Ratio to the rated
4.6
6.0 8.0
(116%)
(150%) (200%)
(Example) 3G3JX-A2007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 20 Hz
Trip time (s)
60
4
Inverter output
frequency (Hz)
0
3.7
(92.8%)
(Example) 3G3JX-A2007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 2.5 Hz
Trip time (s)
60
4
Inverter output
0
frequency (Hz)
3.1
(77.4%)
current of the Inverter)
Motor current (A)
(Ratio to the rated current of the Inverter)
4.8 6.4
(120%) (160%)
Motor current (A)
(Ratio to the rated current of the Inverter)
4.0 5.32
(100%) (133%)
4-2 Function Mode
4-30
4