Mitsubishi Electric FR-A700 Series, Technical Manual

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109
1
S
PECIFI
C
A
T
IONS
SPECIFICATIONS
(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 [%]).
common
70
0.5 Hz
60
50
6Hz
10Hz
20Hz
600
500
400
300
200
100
0 200 25 50 75 100 125 150 175
105%
*1
30Hz or higher
*1
When constant-torque motor is selected in
[
Pr.71 Applied m otor ], this characteristic curve
applies to the operation at 6Hz or higher.
O
per
ati
o
n ti
m
e
(
s
)
Protection activating range
Range on the right of
characteristic curve
Normal operating range
Range on the left of
characteristic curve
O
per
ati
o
n ti
m
e
(min)
Ratio of the motor current to Pr. 9 Electronic thermal relay function (%)
Electronic thermal relay function operation characteristic