Mitsubishi Electric FR-A862 Instruction Manual page 30

2.5.4
Applicable cables and wiring length
Select a recommended cable size to ensure that the voltage drop ratio is within 2%.
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 shows 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 torque
FR-CC2-[ ] size N·m

C355K M12 (M10) 46
C450K M12 (M10) 46
C560K M12 (M10) 46
• Inverter
Inverter Terminal Tightening
model screw torque
FR-A862-[ ] size N·m

05450 M12 (M10) 46
06470 M12 (M10) 46
08500 M12 (M10) 46

It is 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 50°C or lower and in-enclosure wiring.

It is the gauge of the cable with continuous maximum permissible temperature of 90°C (THHN cable). It assumes a surrounding air temperature
of 40°C or lower and in-enclosure wiring.
(For the use in the United States or Canada, refer to

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).
The screw size for earthing (grounding) terminal is indicated in parentheses.
The line voltage drop can be calculated by the following formula:
× 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.
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.
Crimp terminal
R/L1, Earthing
S/L2, P/+, N/- (grounding)
T/L3 cable
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
Earthing
U, V, W P/+, N/- (grounding)
cable
280-12 2100-12 100-10
2125-12 2150-12 100-10
2200-12 2250-12 100-10
page 91.)
1000
Main circuit terminals
Cable gauge
2
HIV cables, etc. (mm )

R/L1, Earthing
P/+,
S/L2, (grounding)
N/-
T/L3 cable
280 2100 100 24/0
2125 2150 100 2300 2350 300
2200 2250 100 2400 2500 300
Cable gauge
2
HIV cables, etc. (mm )

Earthing
U, V, P/+,
(grounding)
W N/-
cable
280 2100 100 2250 2300 4/0
2125 2150 100 2300 2350 300
2200 2250 100 2400 2500 300
INSTALLATION AND WIRING
AWG/MCM

R/L1, Earthing
P/+,
S/L2, (grounding)
N/-
T/L3 cable
2300 4/0
AWG/MCM

Earthing
U, V, P/+,
(grounding)
W N/-
cable
29
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