Mitsubishi Electric FR-E720-0.4K Instruction Manual page 16

Wiring
(1) Cable size and other specifications of the main circuit terminals and the earthing terminal
Select the recommended cable size to ensure that a voltage drop will be 2% at maximum.
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-E720-0.1K to 0.75K M3.5
FR-E720-1.5K, 2.2K
FR-E720-3.7K
FR-E720-5.5K
FR-E720-7.5K
FR-E720-11K
FR-E720-15K M6(M5)
Three-phase 400V class (when input power supply is 440V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-E740-0.4K to 3.7K
FR-E740-5.5K
FR-E740-7.5K
FR-E740-11K
FR-E740-15K
Single-phase 200V class (when input power supply is 220V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-E720S-0.1K to 0.4K M3.5
FR-E720S-0.75K
FR-E720S-1.5K
FR-E720S-2.2K
Single-phase 100V class (when input power supply is 100V)
Terminal
Applicable Inverter
Screw
Model
Size
FR-E710W-0.1K to 0.4K M3.5
FR-E710W-0.75K

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.

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. (For the use in the United States or Canada, refer to page 50.)

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. (Selection example for use mainly in Europe.)

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 FR-E720-15K is indicated in ( ).
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 tighten too loosely can cause a short circuit
or malfunction. A screw that has been tighten too tightly can cause a short circuit or malfunction due to the unit
breakage.
 Use crimp terminals with insulation sleeve to wire the power supply and motor.
12
Crimp
Tightening Terminal
Torque
R/L1
N·m

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
Crimp
Terminal
Tightening
Torque
R/L1
N·m

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
Crimp
Tightening
Terminal
Torque
N·m R/L1

S/L2 U, V, W
1.2 2-3.5 2-3.5
M4 1.5 2-4 2-4
M4 1.5 2-4 2-4
M4 1.5 5.5-4 2-4
Crimp
Tightening
Terminal
Torque
N·m R/L1

S/L2 U, V, W
1.2 2-3.5 2-3.5
M4 1.5 5.5-4 2-4
2
HIV Cables, etc. (mm )

R/L1
Earthing
S/L2 U, V, W
cable
T/L3
2 2 2
2 2 2
3.5 3.5 3.5
5.5 5.5 5.5
14 8 5.5
14 14 8
22 22 14
2
HIV Cables, etc. (mm )

R/L1
Earthing
S/L2 U, V, W
cable
T/L3
2 2 2
3.5 2 3.5
3.5 3.5 3.5
5.5 5.5 5.5
8 8 5.5
2
HIV Cables, etc. (mm )

R/L1 Earthing
S/L2 U, V, W
cable
2 2 2
2 2 2
2 2 2
3.5 2 2
2
HIV Cables, etc. (mm )

R/L1 Earthing
S/L2 U, V, W
cable
2 2 2
3.5 2 2
Cable Size
AWG
 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
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
 PVC Cables, etc. (mm
R/L1 R/L1
S/L2 U, V, W S/L2 U, V, W
14 14 2.5 2.5
14 14 2.5 2.5
14 14 2.5 2.5
12 14 4 2.5
Cable Size
AWG
 PVC Cables, etc. (mm
R/L1 R/L1
S/L2 U, V, W S/L2 U, V, W
14 14 2.5 2.5
14 14 2.5 2.5
2
)

Earthing
cable
2.5
2.5
4
6
6
16
16
2
)

Earthing
cable
2.5
4
4
10
10
2
)

Earthing
cable
2.5
2.5
2.5
2.5
2
)

Earthing
cable
2.5
2.5