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Wiring
(1) Cable sizes etc., of the main control circuit terminals and earth 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.
400V class (when input power supply is 440V based on the rated current for 110% overload for 1 minute)
Terminal
Applicable
Screw
Inverter Type
Size
*4
FR-F740-00023 to
M4
00083-EC
FR-F740-00126-EC
M4
FR-F740-00170-EC
M4
FR-F740-00250-EC
M4
FR-F740-00310-EC
M5
FR-F740-00380-EC
M5
FR-F740-00470-EC
M6
FR-F740-00620-EC
M6
FR-F740-00770-EC
M6
FR-F740-00930-EC
M8
FR-F740-01160-EC
M8
FR-F740-01800-EC
M8
FR-F740-02160-EC
M10
FR-F740-02600-EC
M10
FR-F740-03250-EC
M10
FR-F740-03610-EC
M10
FR-F740-04320-EC M12/M10
FR-F740-04810-EC M12/M10
FR-F740-05470-EC M12/M10
FR-F740-06100-EC M12/M10
FR-F740-06830-EC M12/M10
FR-F740-07700-EC M12/M10
FR-F740-08660-EC M12/M10
FR-F740-09620-EC M12/M10
FR-F740-10940-EC M12/M10
FR-F740-12120-EC M12/M10
*1
For the 01160 or less, the recommended cable size is that of the cable (e.g. HIV cable (600V class 2 vinyl-insulated cable)) 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 01800 or more, the recommended cable size is that of the cable (e.g. LMFC (heat resistant flexible cross-linked polyethylene insulated
cable)) 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 00930 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 01160 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.
*3
For the 00930 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 01160 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.
*4
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw for earthing.
For the 04320 or more, screw sizes are different. (R/L1, S/L2, T/L3, U, V, W / a screw for earthing)
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.
12
Crimping
(Compression)
Tightening
Terminal
Torque
R/L1,
N·m
U, V,
S/L2,
W
T/L3
1.5
2-4
2-4
1.5
2-4
2-4
1.5
5.5-4
5.5-4
1.5
5.5-4
5.5-4
2.5
8-5
8-5
2.5
14-5
8-5
4.4
14-6
14-6
4.4
22-6
22-6
4.4
22-6
22-6
7.8
38-8
38-8
7.8
60-8
60-8
7.8
60-8
60-8
14.7
100-10 100-10
14.7
100-10 150-10
14.7
150-10 150-10
14.7
150-10 150-10
24.5
100-12 100-12 2×100 2×100
24.5
100-12 100-12 2×100 2×100
24.5
150-12 150-12 2×125 2×125
24.5
150-12 150-12 2×150 2×150
24.5
200-12 200-12 2×200 2×200
24.5
C2-200 C2-200 2×200 2×200
24.5
C2-250 C2-250 2×250 2×250
24.5
C2-250 C2-250 2×250 2×250
24.5
C2-200 C2-200 3×200 3×200
24.5
C2-200 C2-200 3×200 3×200
Cable Sizes
2
AWG/MCM
HIV, etc. (mm
)
*1
R/L1,
R/L1,
U, V,
Earth
S/L2,
S/L2,
W
cable
T/L3
T/L3
2
2
2
14
2
2
3.5
12
3.5
3.5
3.5
12
5.5
5.5
8
10
8
8
8
8
14
8
14
6
14
14
14
6
22
22
14
4
22
22
14
4
38
38
22
1
60
60
22
1/0
60
60
38
1/0
80
80
38
3/0
100
125
38
4/0
125
125
38
250
150
150
38
300
38
2×4/0
38
2×4/0
38
2×250
38
2×300
60
2×350
60
2×400
60
2×500
100
2×500
100
3×350
100
3×400
1000
PVC, etc. (mm
*2
R/L1,
U, V, W
U, V, W
S/L2,
T/L3
14
2.5
2.5
14
2.5
2.5
12
4
4
10
6
6
8
10
10
8
16
10
6
16
16
4
25
25
4
25
25
2
50
50
1/0
50
50
1/0
50
50
3/0
70
70
4/0
95
95
250
120
120
300
150
150
2×4/0
2×95
2×95
2×4/0
2×95
2×95
2×250
2×120
2×120
2×300
2×150
2×150
2×350
2×185
2×185
2×400
2×185
2×185
2×500
2×240
2×240
2×500
2×240
2×240
3×350
3×185
3×185
3×400
3×185
3×185
2
)
*3
Earth
cable
2.5
4
4
10
10
16
16
16
16
25
25
25
35
50
70
95
95
95
120
150
2×95
2×95
2×120
2×120
2×150
2×150
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