Mitsubishi Electric FR-E800 Series Instruction Manual page 245

• The electronic thermal O/L relay operation level can be set with the combination of three points (Pr.692, Pr.693), (Pr.694,
Pr.695), (Pr.696, Pr.51) when the RT signal is ON.
Continuous operation characteristic
Load ratio (ratio to Pr.9 (Pr.51)) [%]
100%
Pr.603
(Pr.695)
Pr.601
(Pr.693)
Pr.600 Pr.602
(Pr.692) (Pr.694)
Setting
Load ratio
example 1
Pr.9=100% of the rated
motor current
Pr.600=6Hz
Pr.601=50%
Pr.602=30Hz
Pr.603=70%
Pr.604=60Hz
• When setting Pr.600, Pr.602, Pr.604 (Pr.692, Pr.694, Pr.696) to the same frequency, the following graph's upper level is
applied.
Load ratio [%]
100
80
50
10 Outout frequency[Hz]
NOTE
• Make sure to set the parameters according to the temperature characteristic of the motor used.
Parameters referred to
Pr.71 Applied motorpage 340
Pr.72 PWM frequency selectionpage 184
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
244
11. (H) Protective Function Parameters
11.1 Motor overheat protection (electronic thermal O/L relay)
Pr.604 Output frequency
(Pr.696)
100%
70%
50%
6Hz 30Hz 60Hz
Pr.600 = 10Hz
Pr.601 = 80%
Pr.602 = 10Hz
Pr.603 = 50%
Pr.604 = 10Hz
selection)page 328
selection)page 292
Load ratio
Setting
example 2
100%
Pr.600=120Hz
Pr.601=60%
60%
Pr.602=3Hz
50%
Pr.603=50%
Pr.604=60Hz
Frequency
3Hz 60Hz 120Hz
Frequency