Mitsubishi Electric FR-A700 Series Instruction Manual page 20

(1) Cable sizes etc., of the main control circuit terminals and earth (ground) terminals
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
200V class (when input power supply is 220V)
Terminal Tightening
Applicable
Screw Torque
Inverter Type
Size N·m
*4
FR-A720-0.4K
M4
to 2.2K
FR-A720-3.7K M4
FR-A720-5.5K M4/M5
FR-A720-7.5K M4/M5
FR-A720-11K M5
FR-A720-15K M6
FR-A720-18.5K M8/M6
FR-A720-22K M8/M6
FR-A720-30K M8/M6
FR-A720-37K M10/M8 14.7
FR-A720-45K M10/M8 14.7
FR-A720-55K M12/M8 24.5
FR-A720-75K M12/M10 24.5
FR-A720-90K M12/M10 24.5
*1 For the 55K or less, 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 ambient temperature is 50°C or less and the wiring distance is 20m or less.
For the 75K or more, the recommended cable size is that of the cable (LMFC (heat resistant flexible cross-linked polyethylene insulated cable)
etc.) with continuous maximum permissible temperature of 90°C. Assumes that the ambient temperature is 50°C or less and wiring is performed
in an enclosure.
*2 The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C. Assumes that the
ambient temperature is 40°C or less and the wiring distance is 20m or less.
(Selection example for use mainly in the United States.)
*3 For the 15K or less, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C.
Assumes that the ambient temperature is 40°C or less and the wiring distance is 20m or less.
For the 18.5K or more, the recommended cable size is that of the cable (XLPE cable) with continuous maximum permissible temperature of 90°C.
Assumes that the ambient temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
*4 The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw for earthing (grounding). For the 5.5K and 7.5K,
screw sizes are different (R1/L11, S1/L21, PR, PX / R/L1, S/L2, T/L3, U, V, W, a screw for earthing (grounding)). For the 18.5K or more, screw
sizes are different. (R/L1, S/L2, T/L3, U, V, W / a screw for earthing (grounding))
Crimping
Terminal
R/L1, R/L1,
U, V, W
S/L2, S/L2,
T/L3 T/L3
1.5 2-4 2-4 2
1.5 5.5-4 5.5-4 3.5
2.5 5.5-5 5.5-5 5.5
2.5 14-5 8-5 14
2.5 14-5 14-5 14
4.4 22-6 22-6 22
7.8 38-8 38-8 38
7.8 38-8 38-8 38
7.8 60-8 60-8 60
80-10 80-10 80
100-10 100-10 100
100-12 100-12 100
150-12 150-12 125
150-12 150-12 150
Cable Sizes
2
AWG/MCM
HIV, etc. (mm )
*1
Earth
R/L1,
U, V, W P/+, P1 (Ground)
S/L2,
T/L3
cable
2 2 2
3.5 3.5 3.5
5.5 5.5 5.5
8 14 14
14 14 14
22 22 14
38 38 22
38 38 22
60 60 38 1/0
80 80 38 3/0
100 100 60 4/0
100 100 60 4/0
125 125 38 250
150 150 60 300
PVC, etc. (mm
*2
R/L1,
U, V, W U, V, W
S/L2,
T/L3
14 14 2.5 2.5
12 12 4 4
10 10 6 6
6 8 16 10
6 6 16 16
4 4 25 25
2 2 35 35
2 2 35 35
1/0 50 50
3/0 70 70
4/0 95 95
4/0 95 95
 
250
 
300
Wiring
2
)
*3
Earth
(Ground)
cable
2.5
4
6
16
16
16
25
25
25
35
50
50


2
15