Mitsubishi Electric FR-A802-P Instruction Manual page 38

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 tables for cable selection are one example in the case of a cable of 20 m long used at 440 V power supply.
• Single converter unit
Converter Terminal Tightening
model screw
FR-CC2-[ ]-P Size

H400K M12 (M10) 46
H450K M12 (M10) 46
H500K M12 (M10) 46
H560K M12 (M10) 46
• Single inverter (ND rating)
Inverter Terminal Tightening
model screw
FR-A842-[ ]-P size

09620(400K) M12 (M10) 46
10940(450K) M12 (M10) 46
12120(500K) M12 (M10) 46
• Single inverter (LD rating)
Inverter Terminal Tightening
model screw
FR-A842-[ ]-P size

09620(400K) M12 (M10) 46
10940(450K) M12 (M10) 46
12120(500K) 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 is assumed that the cables will be used in a surrounding air temperatures of 40° C or less and housed in
an enclosure.

The recommended cable size is that of the cable (THHN cable) with continuous maximum permissible temperature of 90°C. It is assumed that
the cables will be used in a surrounding air temperatures of 40° C or less and housed in an enclosure.
(For the use in the United States or Canada, refer to

The cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C. It is assumed that the cables will be
used in a surrounding air temperatures of 40° C or less and housed in an enclosure. (Mainly for use in Europe.)

Screw for R/L1, S/L2, T/L3, U, V, W, P/+, N/-, and the screw for earthing (grounding).
The size of the earthing (grounding) screw 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 the voltage drop (torque reduction) in the low speed
range needs to be reduced.
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
HIV cables, etc. (mm
Torque
R/L1, R/L1,
N·m
S/L2, S/L2,
T/L3 T/L3
C2-200 2200
C2-250 2250
C2-200 3200
C2-200 3200
Crimp
terminal
HIV cables, etc. (mm
Torque
N·m
U, V, W U, V, W P/+, N/-
C2-200 2200
C2-250 2250
C2-250 2250
Crimp
terminal
HIV cables, etc. (mm
Torque
N·m
U, V, W U, V, W P/+, N/-
C2-250 2250
C2-250 2250
C2-200 3200
page
1000
Cable gauge
2
AWG/MCM
)

Earthing
P/+, N/- (grounding)
cable
2200 100 2400
2250 100 2500
3200 2100 2500
3200 2100 3350
Cable gauge
2
AWG/MCM
)

Earthing
(grounding)
cable
2200 100 2400
2250 100 2500
3200 2100 2500
Cable gauge
2
AWG/MCM
)

Earthing
(grounding)
cable
2250 100 2500
3200 2100 2500
3200 2100 3350
115.)
INSTALLATION AND WIRING
Main circuit terminals
PVC cables, etc.

2
(mm )

R/L1, R/L1, Earthing
S/L2, S/L2, (grounding)
T/L3 T/L3 cable
2185 295
2240 2120
2240 2120
3185 2150
PVC cables, etc.

2
(mm )

Earthing
U, V, W U, V, W (grounding)
cable
2185 295
2240 2120
2240 2120
PVC cables, etc.

2
(mm )

Earthing
U, V, W U, V, W (grounding)
cable
2240 2120
2240 2120
3185 2150
2
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