Cables And Wiring Length - Mitsubishi Electric FR-F740-00023 Instruction Manual

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)
Applicable Inverter Model Screw Size
FR-F740-00023 to 00083-EC
FR-F740-00126-EC
FR-F740-00170-EC
FR-F740-00250-EC
FR-F740-00310-EC
FR-F740-00380-EC
FR-F740-00470-EC
FR-F740-00620-EC
FR-F740-00770-EC
FR-F740-00930-EC
FR-F740-01160-EC
FR-F740-01800-EC
FR-F740-02160-EC
FR-F740-02600-EC
FR-F740-03250-EC
FR-F740-03610-EC
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 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 ( ).
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
(Compression)
Terminal
Tightening Terminal
Torque N·m R/L1,
*4
U, V,
S/L2,
T/L3
M4 1.5 2-4 2-4
M4 1.5 2-4 2-4
M4 1.5 5.5-4 5.5-4
M4 1.5 5.5-4 5.5-4
M5 2.5 8-5 8-5
M5 2.5 14-5 8-5
M6 4.4 14-6 14-6
M6 4.4 22-6 22-6
M6 4.4 22-6 22-6
M8 7.8 38-8 38-8
M8 7.8 60-8 60-8
M8 7.8 60-8 60-8
M10 14.7 100-10 100-10
M10 14.7 100-10 100-10
M10 14.7 150-10 150-10
M10 14.7 150-10 150-10
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
24.5 200-12 200-12 2 200
24.5 C2-200 C2-200 2 200
24.5 C2-250 C2-250 2 250
24.5 C2-250 C2-250 2 250
24.5 C2-200 C2-200 3 200
24.5 C2-200 C2-200 3 200
1000
Main circuit terminal specifications
HIV, etc. (mm2) *1
R/L1,
Earth
U, V,
S/L2, (ground)
W W
cable
T/L3
2 2 2
2 2 3.5
3.5 3.5 3.5
5.5 5.5 8
8 8 8
14 8 14
14 14 14
22 22 14
22 22 14
38 38 22
60 60 22
60 60 38
80 80 38
100 100 38
125 125 38
150 150 38
2 100 38
2 100 38
2 125 38
2 150 38
2 200 60
2 200 60
2 250 60
2 250 100
3 200 100
3 200 100
Cable Sizes
AWG/MCM *2 PVC, etc. (mm2) *3
R/L1, R/L1,
S/L2, U, V, W S/L2, U, V, W
T/L3 T/L3
14 14 2.5 2.5
12 14 2.5 2.5
12 12 4 4
10 10 6 6
8 8 10 10
6 8 16 10
6 6 16 16
4 4 25 25
4 4 25 25
1 2 50 50
1/0 1/0 50 50
1/0 1/0 50 50
3/0 3/0 70 70
4/0 4/0 95 95
250 250 120 120
300 300 150 150
2 4/0 2 4/0 2 95 2 95
2 4/0 2 4/0 2 95 2 95
2 250 2 250 2 120 2 120
2 300 2 300 2 150 2 150
2 350 2 350 2 185 2 185
2 400 2 400 2 185 2 185
2 500 2 500 2 240 2 240
2 500 2 500 2 240 2 240
3 350 3 350 3 185 3 185
3 400 3 400 3 185 3 185
Earth
(ground)
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
2 120
2 150
2 150
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