Mitsubishi Electric FR-E700 Instruction Manual page 43

Wiring
Cables and wiring length
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 tables indicate a selection example for the wiring length of 20m.
200V class (when input power supply is 230V)
Terminal
Applicable Inverter
Screw
Type
Size
FR-E720S-008 to 030 M3,5
FR-E720S-050 M4
FR-E720S-080 M4
FR-E720S-110 M4
Tab. 3-5: Cable size
400V class (when input power supply is 440V)
Terminal
Applicable Inverter
Screw
Type
Size
FR-E740-016 to 095 M4
FR-E740-120 M4
FR-E740-170 M4
FR-E740-230 M4
FR-E740-300 M5
Tab. 3-6: Cable size
The recommended cable size is that of the HIV cable (600 V class 2 vinyl-insulated cable)
with continuous maximum permissible temperature of 75 °C. Assumes that the ambient
temperature is 50 °C or less and the wiring distance is 20 m or less.
The recommended cable size is that of the 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 20 m or less.
(Selection example for use mainly in the United States.)
The recommended cable size is that of the 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.
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, and a screw
for earthing. (For single-phase power input, the terminal screw size indicates the size of
terminal screw for L1, N, U, V, W, PR, +, – and P1 and a screw for earthing (grounding).)
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.
FR-E700 EC
Crimping
Tighten- Terminal
ing
Torque
L1, N, L1, N,
[Nm]
P1, + U, V, W
P1, +
1,2 2-3,5 2-3,5 2
1,5 2-4 2-4 2
1,5 2-4 2-4 2
1,5 5,5-4 2-4 3,5
Crimping
Tighten-
Terminal
ing
Torque
L1, N, L1, N,
[Nm]
U, V, W
P1, + P1, +
1,5 2-4 2-4 2
1,5 5,5-4 2-4 3,5
1,5 5,5-4 5,5-4 3,5
1,5 5,5-4 5,5-4 5,5
2,5 8-5 8-5 8
× wire restistance [mΩ/m ]
3
= ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ -
Cable Size
HIV etc. [mm²]
Earth
L1, N,
U, V, W cable
P1, +
gauge
2 2 14
2 2 14
2 2 14
2 3,5 12
Cable Size
HIV etc. [mm²] AWG
Earth
L1, N,
U, V, W cable
P1, +
gauge
2 2 14
2 3,5 12
3,5 3,5 12
5,5 8 10
8 8 8
×
wiring distance [m]
1000
Main circuit connection
AWG PVC [mm²]
L1, N,
U, V, W U, V, W
P1, +
14 2,5 2,5
14 2,5 2,5
14 2,5 2,5
14 4 2,5
PVC [mm²]
L1, N,
U, V, W U, V, W
P1, +
14 2,5 2,5
14 4 2,5
12 4 4
10 6 6
8 10 10
×
current [A]
Earth
cable
gauge
2,5
2,5
2,5
4
Earth
cable
gauge
2,5
4
4
10
10
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