Appendix B Accessories|VFD-VL
B-40
Use a motor with enhanced insulation.
Connect an output reactor (optional) to the output terminals of the AC motor drive
The length of the cable between AC motor drive and motor should be as short as
possible (10 to 20 m or less)
For models 7.5hp/5.5kW and above:
Insulation level of motor 1000V 1300V 1600V
460VAC input voltage 66 ft (20m) 328 ft (100m) 1312 ft (400m)
230VAC input voltage 1312 ft (400m) 1312 ft (400m) 1312 ft (400m)
NOTE
When a thermal O/L relay protected by motor is used between AC motor drive and motor, it may
malfunction (especially for 460V series), even if the length of motor cable is only 165 ft (50m) or less.
To prevent it, please use AC reactor and/or lower the carrier frequency (Pr. 00-17 PWM carrier
frequency).
NOTE
Never connect phase lead capacitors or surge absorbers to the output terminals of the AC motor
drive.
If the length is too long, the stray capacitance between cables will increase and may
cause leakage current. It will activate the protection of over current, increase leakage
current or not insure the correction of current display. The worst case is that AC
motor drive may damage.
If more than one motor is connected to the AC motor drive, the total wiring length is
the sum of the wiring length from AC motor drive to each motor.
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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