– 26 –
(2) Where generating the output of 150% torque (maximum torque for a short period of time) at output
frequency of 6Hz is required:
<Where using an 800 series inverter>
a. Set Pr.14 "the selection of applied load" to "0 (factory setting)". (For constant torque load setting)
b. Set Pr.71 "the applicable motor" to either "70, 73 or 74". (SF-PR motor setting)
c. Set Pr.81 "the motor pole" to either "2, 4 or 6". (Number of motor poles, 2: 2 poles, 4: 4 poles or 6: 6 poles)
d. The system automatically sets a value from Table 20 to Pr.0 "torque boost". Note that if Pr.0 "torque boost" is
altered from the initial setting, no automatic setting occurs.
Table 20 Table of setting values [Common to 200VAC and 400VAC classes: where generating the output of
6Hz, 150% torque (maximum torque for a short period of time) is required.]
Type
Output
(kW)
Parameter setting
Pr.0 "torque boost (%)"
Number of poles: 2
Number of poles: 4
Number of poles: 6
Pr.81=2
Pr.81=4
Pr.81=6
SF-PR
0.75
7.4
6.0
6.4
1.5
5.8
5.0
3.7
2.2
6.0
4.5
3.3
3.7
6.4
4.5
4.2
5.5
4.5
3.7
3.3
7.5
4.4
4.5
3.8
11
3.5
3.3
3.5
15
4.5
3.0
3.5
18.5
4.0
3.2
3.0
22
2.5
3.4
3.0
30
3.0
2.0
2.5
37
2.0
2.5
2.6
45
2.0
2.0
2.4
55
2.0
2.0
–
<Where using a 700 series inverter>
a. Set Pr.14 "the selection of applied load" to "0 (factory setting)". (For constant torque load setting)
b. Set Pr.71 "the applicable motor" to "1". (constant torque motor setting)
c. Set a value from Table 19 to Pr.0 "torque boost".
Table 21 Table of setting values [Common to 200VAC and 400VAC classes: where generating the output of
6Hz, 150% torque (maximum torque for a short period of time) is required.]
Type
Output
(kW)
Parameter setting
Pr.0 "torque boost (%)"
Number of poles: 2
Number of poles: 4
Number of poles: 6
SF-PR
0.75
7.4
6.0
6.4
1.5
5.8
5.0
3.7
2.2
6.0
4.5
3.3
3.7
6.4
4.5
4.2
5.5
4.5
3.7
3.3
7.5
4.4
4.5
3.8
11
3.5
3.3
3.5
15
4.5
3.0
3.5
18.5
4.0
3.2
3.0
22
2.5
3.4
3.0
30
3.0
2.0
2.5
37
2.0
2.5
2.6
45
2.0
2.0
2.4
55
2.0
2.0
–
(Note) When operating an SF-PR type premium efficiency motor (IE3), its output current tends to increase compared to a standard efficiency motor
(IE1) and a high efficiency motor (IE2). Even if operating to the torque boost value recommended by Mitsubishi Electric, the output current
may still increase depending on the loading condition. If the protection devices such as an electronic thermal relay (E.THT, E.THM), a stall
prevention device (OL, E.OLT) or other protective function activates, adjust the Pr.0 torque boost setting depending on the load.