9
Main circuit terminal specifications
3.2.2
Cables and wiring length
(1) Cable sizes etc., of the main control circuit terminals and earth (ground) terminals
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 (65.61feet).
z
Three-phase 200V class (when input power supply is 220V)
z
Three-phase 400V class (when input power supply is 440V)
z
Single-phase 200V class (when input power supply is 220V)
z
Single-phase 100V class (when input power supply is 100V)
Applicable Inverter
Type
Terminal
Screw
Size
Tightening
Torque
N
·
m
Crimping
Terminal
Cable Size
HIV Cables, etc. (mm
2
)
AWG
PVC Cables, etc. (mm
2
)
R/L1
S/L2
T/L3
U, V, W
R/L1
S/L2
T/L3
U, V, W
Earthing
cable
R/L1
S/L2
T/L3
U, V, W
R/L1
S/L2
T/L3
U, V, W
Earthing
cable
FR-E720-008(SC) to 050(SC)
M3.5
1.2
2-3.5
2-3.5
2
2
2
14
14
2.5
2.5
2.5
FR-E720-080(SC), 110(SC)
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-E720-175(SC)
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
12
12
4
4
4
FR-E720-240(SC)
M5
2.5
5.5-5
5.5-5
5.5
5.5
5.5
10
10
6
6
6
FR-E720-330(SC)
M5
2.5
14-5
8-5
14
8
5.5
6
8
16
10
6
FR-E720-470(SC)
M5
2.5
14-5
14-5
14
14
14
6
6
16
16
16
FR-E720-600(SC)
M6(M5)
4.4
22-6
22-6
22
22
14
4
4
25
25
16
Applicable Inverter
Model
Terminal
Screw
Size
Tightening
Torque
N
·
m
Crimping
Terminal
Cable Size
HIV Cables, etc. (mm
2
)
AWG
PVC Cables, etc. (mm
2
)
R/L1
S/L2
T/L3
U, V, W
R/L1
S/L2
T/L3
U, V, W
Earthing
cable
R/L1
S/L2
T/L3
U, V, W
R/L1
S/L2
T/L3
U, V, W
Earthing
cable
FR-E740-016(SC) to 095(SC)
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-E740-120(SC)
M4
1.5
5.5-4
2-4
3.5
2
3.5
12
14
4
2.5
4
FR-E740-170(SC)
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
12
12
4
4
4
FR-E740-230(SC)
M4
1.5
5.5-4
5.5-4
5.5
5.5
8
10
10
6
6
10
FR-E740-300(SC)
M5
2.5
8-5
8-5
8
8
8
8
8
10
10
10
Applicable Inverter
Type
Terminal
Screw
Size
Tightening
Torque
N
·
m
Crimping
Terminal
Cable Size
HIV Cables, etc. (mm
2
)
AWG
PVC Cables, etc. (mm
2
)
R/L1
S/L2
U, V, W
R/L1
S/L2
U, V, W
Earthing
cable
R/L1
S/L2
U, V, W
R/L1
S/L2
U, V, W
Earthing
cable
FR-E720S-008 to 030
M3.5
1.2
2-3.5
2-3.5
2
2
2
14
14
2.5
2.5
2.5
FR-E720S-050
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-E720S-080
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-E720S-110
M4
1.5
5.5-4
2-4
3.5
2
2
12
14
4
2.5
2.5
Applicable Inverter
Type
Terminal
Screw
Size
Tightening
Torque
N
·
m
Crimping
Terminal
Cable Size
HIV Cables, etc. (mm
2
)
AWG
PVC Cables, etc. (mm
2
)
R/L1
S/L2
U, V, W
R/L1
S/L2
U, V, W
Earthing
cable
R/L1
S/L2
U, V, W
R/L1
S/L2
U, V, W
Earthing
cable
FR-E710W-008 to 030
M3.5
1.2
2-3.5
2-3.5
2
2
2
14
14
2.5
2.5
2.5
FR-E710W-050
M4
1.5
5.5-4
2-4
3.5
2
2
14
14
2.5
2.5
2.5
