Mitsubishi Electric FR-A720-0.4K Instruction Manual page 31

Main circuit terminal specifications
*1 For the 55K or lower, the cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible
temperature of 75°C. Assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20m or less.
For the 75K or higher, the recommended cable size is that of the cable (LMFC (heat resistant flexible cross-linked polyethylene insulated cable) etc.) with
continuous maximum permissible temperature of 90°C. Assumes that the surrounding air temperature is 50°C or less and wiring is performed in an
enclosure.
*2 For the all capacity of 200V class, and FR-A740-45K or lower, the recommended cable size is that of the cable (THHW cable) with continuous
maximum permissible temperature of 75°C. Assumes that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
For the FR-A740-55K or higher, the recommended cable size is that of the cable (THHN cable) with continuous maximum permissible temperature of
90°C. Assumes that the surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the United States.)
*3 For the FR-A720-15K or lower, and FR-A740-45K or lower, the recommended cable size is that of the cable (PVC cable) with continuous maximum
permissible temperature of 70°C. Assumes that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less.
For the FR-A720-18.5K or higher, and FR-A740-55K or higher, the recommended cable size is that of the cable (XLPE cable) with continuous
maximum permissible temperature of 90°C. Assumes that the surrounding air temperature is 40°C or less and wiring is performed in an enclosure.
(Selection example for use mainly in Europe.)
*4 The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, PX, P/+, N/-, P1 and a screw for earthing (grounding).
For the FR-A720-5.5K and 7.5K, screw size of terminal PR and PX is indicated in ( ).
A screw for earthing (grounding) of the FR-A720-18.5K or higher is indicated in ( ).
A screw for P/+, N/-, and P1 of the FR-A740-55K is indicated in ( ).
A screw for P/+ terminal for option connection of the FR-A740-110K and 132K is indicated in ( ).
A screw for earthing (grounding) of the FR-A740-160K or higher is indicated in ( ).
The line voltage drop can be calculated by the following formula:
3 × wire resistance[mΩ/m] × wiring distance[m] × current[A]
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.
· Use crimping terminals with insulation sleeve to wire the power supply and motor.
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