YASKAWA V1000 Quick Start Manual page 37

output terminals.
Cable Length Between Drive and Motor
■
When the cable length between the drive and the motor is too long (especially at low
frequency output), note that the cable voltage drop may cause reduced motor torque. Drive
output current will increase as the leakage current from the cable increases. An increase in
leakage current may trigger an overcurrent situation and weaken the accuracy of the current
detection.
Adjust the drive carrier frequency according to the following table. If the motor wiring
distance exceeds 100 m because of the system configuration, reduce the ground currents.
Refer to Carrier Frequency Selection: C6-02 on page
Refer to Table 3.5 to set the carrier frequency to an appropriate level.
Table 3.5 Cable Length Between Drive and Motor
Cable Length
Carrier Frequency
Note: When setting carrier frequency, calculate the cable length as the total distance of wiring to all
connected motors when running multiple motors from a single drive.
Ground Wiring
■
Follow the precautions to wire the ground for one drive or a series of drives.
WARNING! Electrical Shock Hazard. Always use a ground wire that complies with technical standards on
electrical equipment and minimize the length of the ground wire. Improper equipment grounding may cause
dangerous electrical potentials on equipment chassis, which could result in death or serious injury.
WARNING! Electrical Shock Hazard. Be sure to ground the drive ground terminal. (200 V Class: Ground to
100 Ω or less, 400 V Class: Ground to 10 Ω or less). Improper equipment grounding could result in death or
serious injury by contacting ungrounded electrical equipment.
NOTICE: Do not share the ground wire with other devices such as welding machines or large-current
electrical equipment. Improper equipment grounding could result in drive or equipment malfunction due to
electrical interference.
NOTICE: When using more than one drive, ground multiple drives according to instructions. Improper
equipment grounding could result in abnormal operation of drive or equipment.
Refer to Figure 3.3 when using multiple drives. Do not loop the ground wire.
YASKAWA ELECTRIC TOEP C710606 14A YASKAWA AC Drive - V1000 Quick Start Guide
50 m or less
15 kHz or less
3.2 Main Circuit Wiring
71.
100 m or less Greater than 100 m
5 kHz or less
3
2 kHz or less
37