Mitsubishi Electric FR-E800-HVC Series Instruction Manual page 49

Cable type
(carrier frequency)
1 (1 kHz) or lower
Unshielded cable
2 (2 kHz) or higher
1 (1 kHz) or lower
Shielded
2 (2 kHz) or higher
Total wiring length (FR-E820-0167(5.5K) or higher, FR-E840-0094(5.5K) or higher),
unshielded cable
500 m or less
When driving a 400 V class motor by the inverter, surge voltages attributable to the wiring constants may occur at the motor
terminals, deteriorating the insulation of the motor. In this case, take one of the following measure.
• Use a "400 V class inverter-driven insulation-enhanced motor" and set Pr.72 PWM frequency selection according to the
wiring length.
Wiring length 50 m or
shorter
14.5 kHz or lower
 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 400 V class motor (other than EM-A) 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 stray capacitance 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
in the FR-E800 Instruction Manual (Function).)
• A surge voltage suppression filter (FR-ASF-H/FR-BMF-H) can be used under V/F control and Advanced magnetic flux vector
control.
• For details on Pr.72 PWM frequency selection, refer to the FR-E800 Instruction Manual (Function).
• Refer to
• The carrier frequency is limited during Real sensorless vector control and PM sensorless vector control. (Refer to the FR-E800
Instruction Manual (Function).)
48
2. Installation and Wiring
2.5 Main circuit terminals
Pr.72 setting Voltage
class
400 V
Wiring length 50 to 100 m
8 kHz or lower
page 75 to drive a 400 V class motor by an inverter.
Applicable inverter model: FR-E840-[]-HVC
0018(0.75K) 0030(1.5K)
200 m 200 m
30 m 100 m
50 m 50 m
10 m 25 m
300 m
300 m
300 m + 300 m = 600 m
Wiring length longer
than 100 m
2 kHz or lower
0047(2.2K) 0059(3.0K)
300 m 500 m
200 m 300 m
75 m 100 m
50 m 75 m
0094(5.5K) or
higher
500 m
500 m
100 m
100 m