Mitsubishi Electric FR-A700 Technical Manual page 116

(3) Electronic thermal relay function operation characteristic (THM)
Electronic thermal relay function operation characteristics of the inverter when the ratio of the motor current to the [Pr. 9
Electronic thermal O/L relay] is presented in horizontal axis. Horizontal axis is calculated as follows: (motor current [A]/[Pr.
9] [A]) 100 [%]).
Protection activating range
Range on the right of
characteristic curve
Normal operating range
70
Range on the left of
characteristic curve
60
50
600
500
400
300
200
100
0
6Hz
0.5 Hz
25 50 75
Ratio of the motor current to Pr. 9 Electronic thermal relay function (%)
Electronic thermal relay function operation characteristic
30Hz or higher
*1
20Hz
10Hz
*1 When constant-torque motor is selected in
[Pr.71 Applied m otor], this characteristic curve
applies to the operation at 6Hz or higher.
105%
100 125 150
109
SPECIFICATIONS
common
175 200
1