Cables And Wiring Length - Mitsubishi Electric FR-D720-0.2K-G Instruction Manual

Main circuit terminal specifications
2.2.3

Cables and wiring length

(1) Applied wire size
Select the recommended cable size to ensure that a voltage drop will be 2% or less.
If the wiring distance is long between the drive unit and motor, a main circuit cable voltage drop will cause the motor torque to
decrease especially at the output of a low speed.
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 Drive Unit
Screw
Model
Size
FR-D720-0.2K to 0.75K-G
FR-D720-1.5K to 3.7K-G
Three-phase 400V class (when input power supply is 440V)
Terminal
Applicable Drive Unit
Screw
Model
Size
FR-D740-0.4K to 3.7K-G

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 "Instructions for UL and cUL" in
the Instruction Manual (Basic).)

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, 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 crimp terminals with insulation sleeve to wire the power supply and motor.
The line voltage drop can be calculated by the following formula:
3 × wire resistance[mΩ/m] × wiring distance[m] × current[A]
Line voltage drop [V]=
Use a larger diameter cable when the wiring distance is long or when it is desired to decrease the voltage drop (torque
reduction) in the low speed range.
16
Crimp
Tightening Terminal
Torque
R/L1
N·m

S/L2 U, V, W
T/L3
M3.5 1.2 2-3.5 2-3.5
M4 1.5 2-4
Crimp
Tightening
Terminal
Torque
R/L1
N·m

S/L2 U, V, W
T/L3
M4 1.5 2-4
1000
HIV Cables, etc. (mm
R/L1 Earthing
S/L2 U, V, W (grounding)
T/L3 cable
2 2
2-4
HIV Cables, etc. (mm
R/L1 Earthing
S/L2 U, V, W (grounding)
T/L3 cable
2-4 2 2
Cable Size
2
AWG
)  PVC Cables, etc. (mm

R/L1 R/L1
S/L2 U, V, W S/L2
T/L3 T/L3
2 14 14 2.5
Cable Size
2
AWG
)  PVC Cables, etc. (mm

R/L1 R/L1
S/L2 U, V, W S/L2
T/L3 T/L3
2 14 14 2.5
2
)

Earthing
U, V, W (grounding)
cable
2.5 2.5
2
)

Earthing
U, V, W (grounding)
cable
2.5 2.5