Mitsubishi Electric FR-F740 EC Instruction Manual page 50

Main circuit connection
For the 01160 or less, the recommended cable size is that of the HIV cable (600V 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 20m or less.
For the 01800 or more, the recommended cable size is that of LMFC (heat resistant flexible
cross-linked polyethylene insulated cable) with continuous maximum permissible tempera-
ture of 95°C. Assumes that the ambient temperature is 50°C or less and wiring is performed
in an enclosure.
For the 00930 or less, the recommended cable size is that of the THHW cable with
continuous maximum permissible temperature of 75°C. Assumes that the ambient temper-
ature 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 THHN cable with continuous
maximum permissible temperature of 90°C. Assumes that the ambient temperature is 40°C
or less and wiring is performed in an enclosure.
For the 00930 or less, 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.
For the 01160 or more, the recommended cable size is that of XLPE cable with continuous
maximum permissible temperature of 90°C. Assumes that the ambient temperature is 40°C
or less and wiring is performed in an enclosure.
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.
A screw for P/+, N/–, and P1 of the 01800 is indicated in brackets.
A screw for P/+ terminal for option connection of the 03250 and 03610 is indicated in
brackets.
A screw for earthing (grounding) of the 04320 or more is indicated in brackets.
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:
E
● Tighten the terminal screw to the specified torque. A screw that has been tightened
too loosely can cause a short circuit or malfunction. A screw that has been
tightened 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.
3 - 12
× wire resistance [Ω ]
3
= ---------------------------------------------------------------------------------------------------------------------------------------------------------- -
× ×
wiring distance [m] current [A]
1000
Wiring