With PM motor
Use the following length of wiring or shorter when connecting a PM motor.
Pr.72 setting (carrier frequency)
0 (2 kHz) to 15 (14 kHz)
5 or lower (2 kHz)
6 to 9 (6 kHz)
10 (10 kHz) or higher
Use one PM motor for one inverter. Multiple PM motors cannot be connected to an inverter.
• Especially for long-distance wiring, the inverter may be affected by a charging current caused by stray capacitances of the
wiring, leading to an activation of the overcurrent protection, malfunction of the fast-response current limit operation, or even
to an inverter failure. It may also cause a malfunction or fault of the equipment connected ON the inverter output side. If the
fast-response current limit function malfunctions, disable the function. (Refer to Pr.156 Stall prevention operation selection
• A surge voltage suppression filter (FR-ASF-H/FR-BMF-H) can be used under V/F control and Advanced magnetic flux vector
A sine wave filter (MT-BSL/BSC) can be used under V/F control. Do not use the filters under different control methods.
• For the details of Pr.72 PWM frequency selection, refer to
• For the details of the surge voltage suppression filter (FR-ASF-H/FR-BMF-H) and the sine wave filter (MT-BSL/BSC), refer to
the Instruction Manual of each option.
• Refer to
2. INSTALLATION AND WIRING
2.5 Main circuit terminals
to drive a 400 V class motor by an inverter.
FR-F820-00077(1.5K) or lower,
FR-F840-00038(1.5K) or lower
FR-F820-00105(2.2K) or higher,
FR-F840-00052(2.2K) or higher