Mitsubishi Electric FR-V500 Series Instruction Manual page 14

(3) Cables and wiring length
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance between the inverter and motor is long, the motor torque will decrease due to the voltage drop of the
main circuit cable especially at high-frequency output. The encoder signal will also be affected by the voltage drop.
The following selection example assumes the wiring length of 20m.
200V class (When input power supply is 220V)
Applicable Inverter Terminal
Type Screw Size
FR-V520-1.5K, 2.2K
FR-V520-3.7K
FR-V520-5.5K
FR-V520-7.5K
FR-V520-11K
FR-V520-15K
FR-V520-18.5K, 22K
FR-V520-30K
FR-V520-37K
FR-V520-45K
FR-V520-55K
400V class (When input power supply is 440V)
Applicable Inverter Terminal
Type Screw Size
FR-V540-1.5K to 3.7K
FR-V540-5.5K
FR-V540-7.5K
FR-V540-11K
FR-V540-15K
FR-V540-18.5K
FR-V540-22K
FR-V540-30K
FR-V540-37K
FR-V540-45K
FR-V540-55K
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.
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.
• The crimping terminals recommended for use to wire the power supply and motor are those provided
with insulation sleeves.
(4) Wiring length
The wiring length should be 100m maximum. (during vector control)
CAUTION
• Especially for long-distance wiring, the inverter may be affected by a charging current caused by the
stray capacitances of the wiring, leading to a malfunction of the overcurrent protective function or a
malfunction or fault of the equipment connected on the secondary side. If fast response current limit
malfunctions when fast response current limit function is made valid, disable fast response current
limit. (Refer to Pr.156 "stall prevention operation selection".)
(5) Cable gauge for the control circuit power
• Cable gauge: 0.75mm
• Tightening torque: 1.5N•m
Crimping
Tightening
Torque Terminals
N·m
R, S, T U, V, W R, S, T U, V, W R, S, T
M4 1.5 2-4
M5 2.5 3.5-5
M5 2.5 5.5-5
M5 2.5 14-5
M6 4.4 14-6
M8 7.8 22-8
M8 7.8 38-8
M10 14.7 60-10
M10 14.7 100-10 100-10
M12 24.5 100-12 100-12
M12 24.5 150-12 150-12
Tightening Crimping
Terminals
Torque
N·m
R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W
M4 1.5 2-4
M4 1.5 3.5-4
M6 4.4 3.5-6
M6 4.4 5.5-6
M6 4.4 14-6
M6 4.4 14-6
M6 4.4 22-6
M8 7.8 22-8
M8 7.8 38-8
M8 7.8 38-8
M8 7.8 60-8
3 × cable resistance[m /m]× wiring distance[m] × current[A]
1000
2 2
to 2mm
Connection diagram, encoder cable,
HIV Cables
2
mm
2-4 2 2
3.5-5 3.5 3.5
5.5-5 5.5 5.5
8-5 14 8
14-6 14 14
22-8 22 22
38-8 38 38
60-10 60 60
100 100
100 100
150 150 MCM300 MCM300
HIV Cables
2
mm
2-4 2 2
2-4 3.5 2
3.5-6 3.5 3.5
5.5-6 5.5 5.5
8-6 14 8
8-6 14 8
14-6 22 14
22-8 22 22
22-8 38 22
38-8 38 38
60-8 60 60
11
PU connector
PVC Cables
2
AWG
mm
U, V, W R, S, T U, V, W
14 14 2.5 2.5
12 12 6
10 10 10
6 8 16
6 6 25
4 4 35
2 2 50
1/0 1/0 70
4/0 4/0 120
4/0 4/0 150 120
240 185
PVC Cables
2
AWG
mm
14 14 2.5 2.5
12 14 4 2.5
12 12 4
10 10 6
6 8 10 10
6 8 16 16
4 6 25 16
4 4 25 25
2 4 50 35
2 2 50 35
1/0 1/0 70 70
4
6
10
16
25
35
70
95
2
4
6