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Cables And Wiring Length - Mitsubishi Electric FR-V560 Instruction Manual

Vector inverter.
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1.4.2

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 (65.62 feet).
Applicable Inverter
Terminal
Type
Screw Size
FR-V560-2.2K, 3.7K-NA
FR-V560-7.5K-NA
FR-V560-15K-NA
FR-V560-22K-NA
FR-V560-37K-NA
FR-V560-55K-NA
The line voltage drop can be calculated by the following expression:
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.
Tightening
Torque
N·m
M4
1
M4
1
M6
4
M6
4
M8
7
M8
7
3 × cable resistance[m
/m]× wiring distance[m] × current[A]
1000
Main circuit terminal specifications
Crimping
2
Terminals
mm
R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W
2-4
2-4
2
5.5-4
2-4
3.5
5.5-6
5.5-6
5.5
14-6
14-6
14
22-8
22-8
22
38-8
38-8
38
7
HIV Cables
AWG
2
14
14
2
12
14
5.5
10
10
14
6
6
22
4
4
38
2
2
1

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