Mitsubishi Electric FR-A700 Installation Manuallines page 8

(2) Applied cable size
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.
400V class (when input power supply is 440V)
Terminal
Applicable Inverter
Screw
Type
Size
FR-A740-00023 to
M4
00126-EC
FR-A740-00170-EC M4
FR-A740-00250-EC M4
FR-A740-00310-EC M5
FR-A740-00380-EC M5
FR-A740-00470-EC M6
FR-A740-00620-EC M6
FR-A740-00770-EC M6
FR-A740-00930-EC M8
FR-A740-01160-EC M8
FR-A740-01800-EC M8
FR-A740-02160-EC M10
FR-A740-02600-EC M10
FR-A740-03250-EC M10-M12
FR-A740-03610-EC M10-M12
FR-A740-04320-EC M12-M10
FR-A740-04810-EC M12-M10
FR-A740-05470-EC M12-M10
FR-A740-06100-EC M12-M10
FR-A740-06830-EC M12-M10
FR-A740-07700-EC M12-M10
FR-A740-08660-EC M12-M10
FR-A740-09620-EC M12-M10
FR-A740-10940-EC M12-M10
FR-A740-12120-EC M12-M10
*1 For the 01800 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 02160 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 For the 01160 or less, 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.
For the 01800 or more, the recommended cable size is that of the cable (THHN 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 the United States.)
*3 For the 01160 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 01800 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 03250 and 03610, screw sizes are different (<R/L1, S/L2, T/L3, U, V, W, a screw for earthing (grounding)> - <P/+ for option connection>)
For the 04320 or more, screw sizes are different. (<R/L1, S/L2, T/L3, U, V, W> - <a screw for earthing (grounding)>)
The line voltage drop can be calculated by the following formula:
3 × 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.
CAUTION
· Tighten the terminal screw to the specified torque.
A screw that has been tighten too loosely can cause a short circuit or malfunction.
A screw that has been tighten too tightly can cause a short circuit or malfunction due to the unit breakage.
· Use crimping terminals with insulation sleeve to wire the power supply and motor.
Crimping
Tightening
Terminal
Torque
R/L1,
N·m
*4
U, V, W
S/L2,
T/L3
1.5 2-4 2-4
1.5 2-4 2-4
1.5 5.5-4 5.5-4
2.5 5.5-5 5.5-5
2.5 8-5 8-5
4.4 14-6 8-6
4.4 14-6 14-6
4.4 22-6 22-6
7.8 22-8 22-8
7.8 38-8 38-8
7.8 60-8 60-8
14.7 60-10 60-10
14.7 60-10 60-10
14.7 80-10 80-10
14.7 100-10 100-10
24.5 150-12 150-12
24.5 150-12 150-12
24.5 100-12 100-12 2×100
24.5 100-12 100-12 2×100
24.5 150-12 150-12 2×125
24.5 150-12 150-12 2×150
24.5 C2-200 C2-200 2×200
24.5 C2-200 C2-200 2×200
24.5 C2-250 C2-250 2×250
24.5 C2-200 C2-250 3×200
2
HIV, etc. (mm )
*1
R/L1,
U, V, W P/+, P1 (Ground)
S/L2,
T/L3
2 2 2
2 2 3.5
3.5 3.5 3.5
5.5 5.5 5.5
8 8 8
14 8 14
14 14 22
22 22 22
22 22 22
38 38 38
60 60 60
60 60 60
60 60 80
80 80 80
100 100 100
125 150 150
150 150 150
2×100 2×100
2×100 2×125
2×125 2×125
2×150 2×150
2×200 2×200
2×200 2×200
2×250 2×250
2×250 3×200 2×100 2×500 2×500 2×240 2×240 2×120
1000
Cable Sizes
AWG/MCM
PVC, etc. (mm
*2
Earth
R/L1, R/L1,
U, V, W
S/L2, S/L2,
Cable
T/L3 T/L3
2 14 14 2.5
3.5 12 14 2.5
3.5 12 12 4
8 10 10 6
8 8 8 10
14 6 8 16
14 6 6 16
14 4 4 25
14 4 4 25
22 1 2 50
22 1/0 1/0 50
38 1/0 1/0 50
38 3/0 3/0 50
38 3/0 3/0 70
38 4/0 4/0 95
38 250 250 120
38 300 300 150
60 2×4/0 2×4/0 2×95
60 2×4/0 2×4/0 2×95
60 2×250 2×250 2×120 2×120
100 2×300 2×300 2×150 2×150
100 2×350 2×350 2×185 2×185
100 2×400 2×400 2×185 2×185
100 2×500 2×500 2×240 2×240 2×120
WIRING
2
)
*3
Earth
U, V, W (Ground)
Cable
2.5 2.5
2.5 4
4 4
6 10
10 10
10 16
16 16
25 16
25 16
50 25
50 25
50 25
50 25
70 35
95 50
120 70
150 95
2×95 95
2×95 95
120
150
2×95
2×95
6