Advertisement
Total wiring length
With induction motor
Connect one or more general-purpose motors within the total wiring length 500 m. (The wiring length should be 100 m or
less under vector control.)
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.
When the wiring length exceeds 50 m for a 600 V class motor driven by an inverter under PM sensorless vector control,
set "9" (6 kHz) or less in Pr.72 PWM frequency selection.
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 FR-A860 Instruction Manual
(Detailed))
• For the details of Pr.72 PWM frequency selection, refer to the FR-A860 Instruction Manual (Detailed).
• The carrier frequency is limited during PM sensorless vector control. (Refer to the FR-A860 Instruction Manual (Detailed))
500 m or less
Main circuit terminals
300 m
300 m
300 m+300 m=600 m
INSTALLATION AND WIRING
2
29
Advertisement
