Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 46 / 608

Main circuit connection Wiring
3 - 10
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 20 m.
200 V class (when input power supply is 230 V)
400 V class (when input power supply is 440 V)
햲
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.
햳
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 or Canada.)
햴
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 20 m or less. (Selection example for use mainly in Europe.)
햵
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/– and P1
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).)
Applicable Inverter Type
Terminal
Screw
Size
햵
Tightening
Torque
[Nm]
Crimping
Terminal
Cable Size
HIV etc. [mm²]
햲
AWG
햳
PVC [mm²]
햴
L1, N,
P1, +
U, V, W
L1, N,
P1, +
U, V, W
Earth
cable
gauge
L1, N,
P1, +
U, V, W
L1, N,
P1, +
U, V, W
Earth
cable
gauge
FR-E720S-008SC to 030SC M3.5 1.2 2-3.5 2-3.5 2 2 2 14 14 2.5 2.5 2.5
FR-E720S-050SC M4 1.5 2-4 2-4 2 2 2 14 14 2.5 2.5 2.5
FR-E720S-080SC M4 1.5 2-4 2-4 2 2 2 14 14 2.5 2.5 2.5
FR-E720S-110SC M4 1.5 5.5-4 2-4 3.5 2 2 12 14 4 2.5 2.5
Tab. 3-5: Cable size
Applicable Inverter Type
Terminal
Screw
Size
햵
Tightening
Torque
[Nm]
Crimping
Terminal
Cable Size
HIV etc. [mm²]
햲
AWG
햳
PVC [mm²]
햴
R/L1,
S/L2,
T/L3,
P1, P/+
U, V, W
R/L1,
S/L2,
T/L3,
P1, P/+
U, V, W
Earth
cable
gauge
R/L1,
S/L2,
T/L3,
P1, P/+
U, V, W
R/L1,
S/L2,
T/L3,
P1, P/+
U, V, W
Earth
cable
gauge
FR-E740-016SC to 095SC M4 1.5 2-4 2-4 2 2 2 14 14 2.5 2.5 2.5
FR-E740-120SC M4 1.5 5.5-4 5.5-4 3.5 2 3.5 12 14 4 2.5 4
FR-E740-170SC M4 1.5 5.5-4 5.5-4 3.5 3.5 3.5 12 12 4 4 4
FR-E740-230SC M4 1.5 5.5-4 5.5-4 5.5 5.5 5.5 10 10 6 6 10
FR-E740-300SC M5 2.5 8-5 8-5 8 8 5.5 8 8 10 10 10
Tab. 3-6: Cable size