20
Main circuit terminal specifications
2.2.3
Cables and wiring length
(1) Applicable cable size
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
200V class (when input power supply is 220V)
Applicable Inverter
Type
Terminal
Screw
Size
*4
Tightening
Torque
N·m
Crimping
Terminal
Cable Sizes
HIV, etc. (mm
2
)
*1
AWG/MCM
*2
PVC, etc. (mm
2
)
*3
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Earth
(Ground)
cable
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Earth
(Ground)
cable
FR-F720-0.75K to
2.2K
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-F720-3.7K
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
12
12
4
4
4
FR-F720-5.5K
M4
1.5
5.5-4
5.5-4
5.5
5.5
5.5
10
10
6
6
6
FR-F720-7.5K
M5
2.5
14-5
8-5
14
8
5.5
6
8
16
10
16
FR-F720-11K
M5
2.5
14-5
14-5
14
14
14
6
6
16
16
16
FR-F720-15K
M5
2.5
22-5
22-5
22
22
14
4
6 (
*5
)
25
25
16
FR-F720-18.5K
M6
4.4
38-6
38-6
38
38
22
2
2
35
35
25
FR-F720-22K
M8 (M6)
7.8
38-8
38-8
38
38
22
2
2
35
35
25
FR-F720-30K
M8 (M6)
7.8
60-8
60-8
60
60
22
1/0
1/0
50
50
25
FR-F720-37K
M8 (M6)
7.8
80-8
80-8
80
80
22
3/0
3/0
70
70
35
FR-F720-45K
M10 (M8)
14.7
100-10 100-10
100
100
38
4/0
4/0
95
95
50
FR-F720-55K
M10 (M8)
14.7
100-10 100-10
100
100
38
4/0
4/0
95
95
50
FR-F720-75K
M12 (M10)
24.5
150-12 150-12
125
125
38
MCM250 MCM250
⎯
⎯
⎯
FR-F720-90K
M12 (M10)
24.5
150-12 150-12
150
150
38
2
×
4/0
2
×
4/0
⎯
⎯
⎯
FR-F720-110K
M12 (M10)
24.5
100-12 100-12
2
×
100
2
×
100
38
2
×
4/0
2
×
4/0
⎯
⎯
⎯
*1
The cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible temperature of
75°C. Assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20m or less.
*2
The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C. Assumes that the
surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
(Selection example for use mainly in the United States.)
*3
For the 15K or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C.
Assumes that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
For the 18.5K or more, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of
90°C. Assumes that the surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
*4
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw for earthing (grounding).
A screw for earthing (grounding) of the 22K or more is indicated in ( ).
*5
When connecting the option unit to P/+, P1, N/-, use THHN cables for the option and terminals R/L1, S/L2, T/L3, U, V, W.
