Overheat Protection To Match The Characteristic Of The Motor (Pr.600 To Pr.604, Pr.692 To Pr.696) - Mitsubishi Electric FR-F800 Instruction Manual

(H) Protective function parameter
Overheat protection to match the characteristic of the motor (Pr.600 to
Pr.604, Pr.692 to Pr.696)
• The activation level of the electronic thermal O/L relay can be varied to match the motor temperature characteristic.
• The electronic thermal O/L relay's activation level can be set using the combination of three points (Pr.600, Pr.601),
(Pr.602, Pr.603), (Pr.604, Pr.9). Two or more points are required for setting.
• The electronic thermal O/L relay's activation level can be set to using 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
100%
Pr.9=100% of the rated
70%
motor current
Pr.600=6Hz
50%
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 will
be applied.
Load ratio [%]
100
80
50
10 Outout frequency[Hz]
NOTE
• Make sure to set the parameters according to the motor temperature characteristic used.
Parameters referred to ???????
Pr.71 Applied motor page 337
Pr.72 PWM frequency selection
Pr.178 to Pr.189 (input terminal function selection)
Pr.190 to Pr.196 (output terminal function selection)
232
PARAMETERS
Pr.604 Output frequency
(Pr.696)
6Hz 30Hz 60Hz
Frequency
Pr.600 = 10Hz
Pr.601 = 80%
Pr.602 = 10Hz
Pr.603 = 50%
Pr.604 = 10Hz
page 179
page 329
page 288
Load ratio
Setting
example 2
100%
Pr.600=120Hz
Pr.601=60%
60%
Pr.602=3Hz
50%
Pr.603=50%
Pr.604=60Hz
3Hz
Frequency
60Hz 120Hz