Delta Electronics VFD-VL Benutzerhandbuch

Appendix B Accessories|

B-38

Revision Nov. 2008, VLE1, SW V1.03

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)

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.

B.9.1 Dimensions

Dimensions are in millimeter and (inch)