17
Main circuit terminal specifications
2
WI
R
IN
G
2.2.3
Cables and wiring length
(1) Applicable 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 based on the rated current for 110% overload for 1 minute)
The line voltage drop can be calculated by the following formula:
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.
Applicable Inverter Model
Terminal
Screw Size
*4
Tightening
Torque N·m
Crimping
(Compression)
Terminal
Cable Sizes
HIV, etc. (mm2) *1
AWG/MCM *2
PVC, etc. (mm2) *3
R/L1,
S/L2,
T/L3
U, V,
W
R/L1,
S/L2,
T/L3
U, V,
W
Earth
(ground)
cable
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W
Earth
(ground)
cable
FR-F740-00023 to 00083-EC
M4
1.5
2-4
2-4
2
2
2
14
14
2.5
2.5
2.5
FR-F740-00126-EC
M4
1.5
2-4
2-4
2
2
3.5
12
14
2.5
2.5
4
FR-F740-00170-EC
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
12
12
4
4
4
FR-F740-00250-EC
M4
1.5
5.5-4
5.5-4
5.5
5.5
8
10
10
6
6
10
FR-F740-00310-EC
M5
2.5
8-5
8-5
8
8
8
8
8
10
10
10
FR-F740-00380-EC
M5
2.5
14-5
8-5
14
8
14
6
8
16
10
16
FR-F740-00470-EC
M6
4.4
14-6
14-6
14
14
14
6
6
16
16
16
FR-F740-00620-EC
M6
4.4
22-6
22-6
22
22
14
4
4
25
25
16
FR-F740-00770-EC
M6
4.4
22-6
22-6
22
22
14
4
4
25
25
16
FR-F740-00930-EC
M8
7.8
38-8
38-8
38
38
22
1
2
50
50
25
FR-F740-01160-EC
M8
7.8
60-8
60-8
60
60
22
1/0
1/0
50
50
25
FR-F740-01800-EC
M8
7.8
60-8
60-8
60
60
38
1/0
1/0
50
50
25
FR-F740-02160-EC
M10
14.7
100-10 100-10
80
80
38
3/0
3/0
70
70
35
FR-F740-02600-EC
M10
14.7
100-10 100-10
100
100
38
4/0
4/0
95
95
50
FR-F740-03250-EC
M10
14.7
150-10 150-10
125
125
38
250
250
120
120
70
FR-F740-03610-EC
M10
14.7
150-10 150-10
150
150
38
300
300
150
150
95
FR-F740-04320-EC
M12(M10)
24.5
100-12 100-12 2
u
100 2
u
100
38
2
u
4/0
2
u
4/0
2
u
95
2
u
95
95
FR-F740-04810-EC
M12(M10)
24.5
100-12 100-12 2
u
100 2
u
100
38
2
u
4/0
2
u
4/0
2
u
95
2
u
95
95
FR-F740-05470-EC
M12(M10)
24.5
150-12 150-12 2
u
125 2
u
125
38
2
u
250 2
u
250 2
u
120 2
u
120
120
FR-F740-06100-EC
M12(M10)
24.5
150-12 150-12 2
u
150 2
u
150
38
2
u
300 2
u
300 2
u
150 2
u
150
150
FR-F740-06830-EC
M12(M10)
24.5
200-12 200-12 2
u
200 2
u
200
60
2
u
350 2
u
350 2
u
185 2
u
185
2
u
95
FR-F740-07700-EC
M12(M10)
24.5
C2-200 C2-200 2
u
200 2
u
200
60
2
u
400 2
u
400 2
u
185 2
u
185
2
u
95
FR-F740-08660-EC
M12(M10)
24.5
C2-250 C2-250 2
u
250 2
u
250
60
2
u
500 2
u
500 2
u
240 2
u
240 2
u
120
FR-F740-09620-EC
M12(M10)
24.5
C2-250 C2-250 2
u
250 2
u
250
100
2
u
500 2
u
500 2
u
240 2
u
240 2
u
120
FR-F740-10940-EC
M12(M10)
24.5
C2-200 C2-200 3
u
200 3
u
200
100
3
u
350 3
u
350 3
u
185 3
u
185 2
u
150
FR-F740-12120-EC
M12(M10)
24.5
C2-200 C2-200 3
u
200 3
u
200
100
3
u
400 3
u
400 3
u
185 3
u
185 2
u
150
*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 surrounding air 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 surrounding air 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 surrounding air 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 surrounding air 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 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 surrounding air 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 surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the Europe.)
*4
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, P/+, N/-, P1, and a screw for earthing (grounding).
A screw for earthing (grounding) of the FR-F740-04320 or more is indicated in ( ).
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.
3
×
wire resistance[m
Ω
/m]
×
wiring distance[m]
×
current[A]
1000
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