Mitsubishi Electric FR-A862-05450-E Instruction Manual page 29

Main circuit terminals
2.5.4
Applicable cables and 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 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 (575 V input power supply, 150% overload
current rating for 1 minute).
• Converter unit (FR-CC2)
Converter Terminal Tightening
model screw
FR-CC2-[ ] Size

C355K M12 (M10) 46
C450K M12 (M10) 46
C560K M12 (M10) 46
• Inverter
Inverter Terminal Tightening
model screw
FR-A862-[ ] size

05450 M12 (M10) 46
06470 M12 (M10) 46
08500 M12 (M10) 46

The gauge of the cable with the continuous maximum permissible temperature of 90°C or higher. (LMFC (heat resistant flexible cross-linked
polyethylene insulated cable), etc.). It assumes a surrounding air temperature of 40°C or lower and in-enclosure wiring.

The recommended cable size is that of the cable (THHN cable) with continuous maximum permissible temperature of 90°C. It assumes a
surrounding air temperature of 40°C or lower and in-enclosure wiring.
(Selection example for use mainly in the United States.)

The terminal screw size indicates the size of a terminal screw for R/L1, S/L2, T/L3, U, V, W, P/+, N/-, and a screw for earthing (grounding).
Screw size for earthing (grounding) is indicated in parentheses.
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 crimp terminals with insulation sleeves to wire the power supply and motor.
28
INSTALLATION AND WIRING
Crimp terminal
Torque
R/L1,
N·m
S/L2, P/+, N/-
T/L3
280-12 2100-12 100-10
2125-12 2150-12 100-10
2200-12 2250-12 100-10
Crimp terminal
Torque
N·m
U, V, W P/+, N/-
280-12 2100-12 100-10
2125-12 2150-12 100-10
2200-12 2250-12 100-10
× wire resistance [mΩ/m] × wiring distance [m] × current [A]
HIV cables, etc. (mm
Earthing R/L1,
P/+,
(grounding) S/L2,
cable T/L3
280 2100 100
2125 2150 100
2200 2250 100
HIV cables, etc. (mm
Earthing
U, V, P/+,
(grounding)
W
cable
280 2100 100
2125 2150 100
2200 2250 100
1000
Cable gauge
2
)

Earthing R/L1,
(grounding) S/L2,
N/-
cable T/L3
24/0
2300 2350 300
2400 2500 300
Cable gauge
2
)

Earthing
U, V,
(grounding)
N/- W
cable
2250 2300 4/0
2300 2350 300
2400 2500 300
AWG/MCM

Earthing
P/+,
(grounding)
N/-
cable
2300 4/0
AWG/MCM

Earthing
P/+,
(grounding)
N/-
cable