Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 41 / 727

Main circuit terminals
40
INSTALLATION AND WIRING
2.5.3
Applicable cables and the wiring length
Select a recommended cable size to ensure that the voltage drop will be 2% or less.
If the wiring distance is long between the inverter and motor, the voltage drop in the main circuit wires will cause the motor
torque to decrease especially at a low speed.
The following table indicates a selection example for the wiring length of 20 m.
• 600V class (575 V input power supply, 150% overload current rating for 1 minute)

The cables used should be 75°C copper cables.

The terminal screw size indicates the size of terminal screw for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, P1, P3, and the screw for earthing
(grounding), and P/+ for option connection. A screw for earthing (grounding) of the FR-A860-02890 or higher is indicated in ( ).
The line voltage drop can be calculated by the following formula:
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.
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 sleeves to wire the power supply and motor.
Applicable
inverter
model
Terminal
screw
size

Tightening
torque
N•m
Crimping terminal
Cable gauge

HIV cables, etc. (mm
2
)
AWG/MCM
R/L1,
S/L2,
T/L3
U, V,
W
P/+,
P1
Earthing
(grounding)
cable
R/L1,
S/L2,
T/L3
U, V,
W
P/+,
P1
Earthing
(grounding)
cable
R/L1,
S/L2,
T/L3
U, V,
W
P/+,
P1
Earthing
(grounding)
cable
FR-A860-00027
to 00090
M4 1.5 2-4 2-4 2-4 2-4 2 2 2 2 14 14 14 14
FR-A860-00170 M4 1.5 3.5-4 2-4 3.5-4 3.5-4 3.5 2 3.5 3.5 12 14 10 12
FR-A860-00320 M5 2.5 5.5-5 5.5-5 8-5 5.5-5 5.5 5.5 8 5.5 10 10 8 10
FR-A860-00450 M6 4.4 14-6 14-6 14-6 14-6 14 14 14 14 6 6 4 6
FR-A860-00680 M8 7.8 22-8 22-8 22-8 22-8 22 22 22 22 4 4 2 4
FR-A860-01080 M8 7.8 38-8 38-8 38-8 22-8 38 38 38 22 2 2 1/0 4
FR-A860-01440 M10 14.7 60-10 60-10 60-10 38-10 60 60 60 38 2 2 1/0 1
FR-A860-01670 M10 14.7 60-10 60-10 60-10 38-10 60 60 60 38 1/0 1/0 2/0 1
FR-A860-02430 M10 14.7 60-10 60-10 60-10 38-10 60 60 60 38 2/0 2/0 3/0 1
FR-A860-02890 M12(M10) 24.5 80-12 80-12 80-12 38-10 80 80 80 38 4/0 250 300 1
FR-A860-03360 M12(M10) 24.5 100-12 100-12 125-12 38-10 100 100 125 38 250 300 2

2/0 1
FR-A860-04420 M12(M10) 46 125-12 125-12 150-12 60-10 125 125 150 60 2

2/0 2

3/0 2

4/0 1/0
× wire resistance [mΩ/m] × wiring distance [m] × current [A]
1000