Mitsubishi Electric FR-F820-00077 Instruction Manual page 331

Parameters
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)) [%]
Setting
example 1
Pr. 9 = 100% of the rated
motor current
Pr. 600 = 6 Hz
Pr. 601 = 50 %
Pr. 602 = 30 Hz
Pr. 603 = 70 %
Pr. 604 = 60 Hz
Fig. 5-55:
● 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
NOTE Make sure to set the parameters according to the motor temperature characteristic used.
Parameters referred to
Pr. 71
Pr. 72
Pr. 178 to Pr. 189
Pr. 190 to Pr. 196
FR-F800
100%
Pr. 603
(Pr. 695)
Pr. 601
(Pr. 693)
Pr. 600 Pr. 602 Pr. 604
(Pr. 692) (Pr. 694) (Pr. 696)
Load ratio
100 %
70 %
50 %
6 Hz 30 Hz
Setting examples
80
50
Output frequency [Hz]
10
Applied motor
PWM frequency selection
(input terminal function selection)
(output terminal function selection)
Fig. 5-54:
Overheat protection setting
Output
frequency
Load ratio
Setting
example 2
Pr. 600 = 120 Hz
Pr. 601 = 800 %
Pr. 602 = 3 Hz
Pr. 603 = 50 %
Pr. 604 = 80 Hz
60 Hz
Frequency
Fig. 5-56:
Overheat protection setting example
Pr. 600 = 10 Hz
Pr. 601 = 80 %
Pr. 602 = 10 Hz
Pr. 603 = 50 %
Pr. 604 = 10 Hz
(H) Protective function parameter
100 %
60 %
50 %
3 Hz 60 Hz
=> page 5-297
=> page 5-88
=> page 5-285
=> page 5-231
I002586E
Frequency
120 Hz
I002833E
I002587E
5 - 159