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Wiring
(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.
Three-phase 200V class (when input power supply is 220V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-D720-0.1K to 0.75K
M3.5
FR-D720-1.5K, 2.2K
FR-D720-3.7K
FR-D720-5.5K
FR-D720-7.5K
FR-D720-11K
FR-D720-15K
M6 (M5)
Three-phase 400V class (when input power supply is 440V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-D740-0.4K to 3.7K
FR-D740-5.5K
FR-D740-7.5K
FR-D740-11K
FR-D740-15K
Single-phase 200V class (when input power supply is 220V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-D720S-0.1K to 0.75K
M3.5
FR-D720S-1.5K
FR-D720S-2.2K
Single-phase 100V class (when input power supply is 100V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-D710W-0.1K to 0.4K
M3.5
FR-D710W-0.75K
∗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
The recommended cable size is that of the cable (THHW 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.
(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, PR, P/+, N/-, P1 and a screw for earthing (grounding).
Screw size for earthing (grounding) the FR-D720-15K is indicated in parenthesis.
For single-phase power input, the terminal screw size indicates the size of terminal screw for R/L1, S/L2, U, V, W, PR, P/+, N/-, P1 and a screw for earthing
(grounding).
NOTE
Tighten the terminal screw to the specified torque. A screw that has been tightened too loosely can cause a short circuit or
malfunction. A screw that has been tightened too tightly can cause a short circuit or malfunction due to the unit breakage.
Use crimping terminals with insulation sleeve to wire the power supply and motor.
12
Crimping
Tightening
Terminal
Torque
R/L1
N·m
∗4
S/L2
U, V, W
T/L3
1.2
2-3.5
2-3.5
M4
1.5
2-4
2-4
M4
1.5
5.5-4
5.5-4
M5
2.5
5.5-5
5.5-5
M5
2.5
14-5
8-5
M5
2.5
14-5
14-5
4.4
22-6
22-6
Crimping
Terminal
Tightening
Torque
R/L1
N·m
∗4
S/L2
U, V, W
T/L3
M4
1.5
2-4
2-4
M4
1.5
5.5-4
2-4
M4
1.5
5.5-4
5.5-4
M4
1.5
5.5-4
5.5-4
M5
2.5
8-5
8-5
Crimping
Terminal
Tightening
Torque
R/L1
N·m
∗4
U, V, W
S/L2
1.2
2-3.5
2-3.5
M4
1.5
2-4
2-4
M4
1.5
5.5-4
2-4
Crimping
Tightening
Terminal
Torque
R/L1
N·m
∗4
U, V, W
S/L2
1.2
2-3.5
2-3.5
M4
1.5
5.5-4
2-4
2
HIV Cables, etc. (mm
)
∗1
R/L1
Earth
S/L2
U, V, W
(ground)
T/L3
cable
2
2
2
2
2
2
3.5
3.5
3.5
5.5
5.5
5.5
14
8
5.5
14
14
14
22
22
14
2
HIV Cables, etc. (mm
)
∗1
R/L1
Earth
S/L2
U, V, W
(ground)
T/L3
cable
2
2
2
3.5
2
3.5
3.5
3.5
3.5
5.5
5.5
8
8
8
8
2
HIV Cables, etc. (mm
)
∗1
Earth
R/L1
U, V, W
(ground)
S/L2
cable
2
2
2
2
2
2
3.5
2
3.5
2
HIV Cables, etc. (mm
)
∗1
Earth
R/L1
U, V, W
(ground)
S/L2
cable
2
2
2
3.5
2
2
Cable Size
AWG
∗2
PVC Cables, etc. (mm
R/L1
R/L1
S/L2
U, V, W
S/L2
U, V, W
T/L3
T/L3
14
14
2.5
2.5
14
14
2.5
2.5
12
12
4
4
10
10
6
6
6
8
16
10
6
6
16
16
4
4
25
25
Cable Size
AWG
∗2
PVC Cables, etc. (mm
R/L1
R/L1
S/L2
U, V, W
S/L2
U, V, W
T/L3
T/L3
14
14
2.5
2.5
12
14
4
2.5
12
12
4
4
10
10
6
6
8
8
10
10
Cable Size
AWG
∗2
PVC Cables, etc. (mm
R/L1
R/L1
U, V, W
U, V, W
S/L2
S/L2
14
14
2.5
2.5
14
14
2.5
2.5
12
14
4
2.5
Cable Size
AWG
∗2
PVC Cables, etc. (mm
R/L1
R/L1
U, V, W
U, V, W
S/L2
S/L2
14
14
2.5
2.5
12
14
4
2.5
2
)
∗3
Earth
(ground)
cable
2.5
2.5
4
6
6
16
16
2
)
∗3
Earth
(ground)
cable
2.5
4
4
10
10
2
)
∗3
Earth
(ground)
cable
2.5
2.5
4
2
)
∗3
Earth
(ground)
cable
2.5
2.5
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