Mitsubishi Electric FR-F862-E Instruction Manual page 31

Main circuit terminals
The line voltage drop can be calculated by the following formula:
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.
NOTE
• 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 crimp terminals with insulation sleeves to wire the power supply and motor.
Total wiring length
 With induction motor
Connect one or more general-purpose motors within the total wiring length 500 m.
Total wiring length
 With PM motor
Use the wiring length of 100 m or shorter when connecting a PM motor.
Use one PM motor for one inverter. Multiple PM motors cannot be connected to an inverter.
NOTE
• Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray capacitances of the
wiring, leading to a malfunction of the overcurrent protective function or fast response current limit function or a malfunction or
fault of the equipment connected on the inverter output side. If the fast-response current limit function malfunctions, disable
this function. (For the details of Pr.156 Stall prevention operation selection, refer to the Instruction Manual (Detailed) of the
FR-F860.)
• For the details of Pr.72 PWM frequency selection, refer to the Instruction Manual (Detailed) of the FR-F860.
30
INSTALLATION AND WIRING
× wire resistance [mΩ/m] × wiring distance [m] × current [A]
500 m or less
1000
300 m+300 m=600 m
300 m
300 m