18
Main circuit terminal specifications
2.2.3
Cables and wiring length
(1) 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)
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
Type
Terminal
Screw
Size
*4
Tightening
Torque
N·m
Crimping
Terminal
Cable Sizes
HIV, etc. (mm
2
)
*1
AWG/MCM
*2
PVC, etc. (mm
2
)
*3
R/L1,
S/L2,
T/L3
U, V, W
R/L1,
S/L2,
T/L3
U, V, W P/+, P1
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-A740-00023 to
00126-EC
M4
1.5
2-4
2-4
2
2
2
2
14
14
2.5
2.5
2.5
FR-A740-00170-EC
M4
1.5
2-4
2-4
2
2
3.5
3.5
12
14
2.5
2.5
4
FR-A740-00250-EC
M4
1.5
5.5-4
5.5-4
3.5
3.5
3.5
3.5
12
12
4
4
4
FR-A740-00310-EC
M5
2.5
5.5-5
5.5-5
5.5
5.5
5.5
8
10
10
6
6
10
FR-A740-00380-EC
M5
2.5
8-5
8-5
8
8
8
8
8
8
10
10
10
FR-A740-00470-EC
M6
4.4
14-6
8-6
14
8
14
14
6
8
16
10
16
FR-A740-00620-EC
M6
4.4
14-6
14-6
14
14
22
14
6
6
16
16
16
FR-A740-00770-EC
M6
4.4
22-6
22-6
22
22
22
14
4
4
25
25
16
FR-A740-00930-EC
M8
7.8
22-8
22-8
22
22
22
14
4
4
25
25
16
FR-A740-01160-EC
M8
7.8
38-8
38-8
38
38
38
22
1
2
50
50
25
FR-A740-01800-EC
M8
7.8
60-8
60-8
60
60
60
22
1/0
1/0
50
50
25
FR-A740-02160-EC
M10
14.7
60-10 60-10
60
60
60
38
1/0
1/0
50
50
25
FR-A740-02600-EC
M10
14.7
60-10 60-10
60
60
80
38
3/0
3/0
50
50
25
FR-A740-03250-EC M10-M12
14.7
80-10 80-10
80
80
80
38
3/0
3/0
70
70
35
FR-A740-03610-EC M10-M12
14.7
100-10 100-10
100
100
100
38
4/0
4/0
95
95
50
FR-A740-04320-EC M12-M10
24.5
150-12 150-12
125
150
150
38
250
250
120
120
70
FR-A740-04810-EC M12-M10
24.5
150-12 150-12
150
150
150
38
300
300
150
150
95
FR-A740-05470-EC M12-M10
24.5
100-12 100-12 2
×
100
2
×
100 2
×
100
60
2
×
4/0 2
×
4/0 2
×
95
2
×
95
95
FR-A740-06100-EC M12-M10
24.5
100-12 100-12 2
×
100
2
×
100 2
×
125
60
2
×
4/0 2
×
4/0 2
×
95
2
×
95
95
FR-A740-06830-EC M12-M10
24.5
150-12 150-12 2
×
125
2
×
125 2
×
125
60
2
×
250 2
×
250 2
×
120 2
×
120
120
FR-A740-07700-EC M12-M10
24.5
150-12 150-12 2
×
150
2
×
150 2
×
150
100
2
×
300 2
×
300 2
×
150 2
×
150
150
FR-A740-08660-EC M12-M10
24.5
C2-200 C2-200 2
×
200
2
×
200 2
×
200
100
2
×
350 2
×
350 2
×
185 2
×
185 2
×
95
FR-A740-09620-EC M12-M10
24.5
C2-200 C2-200 2
×
200
2
×
200 2
×
200
100
2
×
400 2
×
400 2
×
185 2
×
185 2
×
95
FR-A740-10940-EC M12-M10
24.5
C2-250 C2-250 2
×
250
2
×
250 2
×
250
100
2
×
500 2
×
500 2
×
240 2
×
240 2
×
120
FR-A740-12120-EC M12-M10
24.5
C2-200 C2-250 3
×
200
2
×
250 3
×
200 2
×
100 2
×
500 2
×
500 2
×
240 2
×
240 2
×
120
*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)>)
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
Summary of Contents for FR-A740-00023-EC
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