Yaskawa J1000 Compact Vector Control Drive - Manual (Page 66)

u Main Circuit Terminal Power Supply and Motor Wiring
This section outlines the various steps, precautions, and checkpoints for wiring the main circuit
terminals and motor terminals.
NOTICE: When connecting the motor to the drive output terminals U/T1, V/T2, and W/T3, the phase order
for the drive and motor should match. Failure to comply with proper wiring practices may cause the motor to
run in reverse if the phase order is backward.
NOTICE: Route motor leads U/T1, V/T2, and W/T3 separate from all other leads to reduce possible
interference related issues. Failure to comply may result in abnormal operation of drive and nearby equipment.
NOTICE: Do not connect phase-advancing capacitors or LC/RC noise filters to the output circuits. Improper
application of noise filters could result in damage to the drive.
NOTICE: Do not connect the AC power line to the output motor terminals of the drive. Failure to comply could
result in death or serious injury by fire as a result of drive damage from line voltage application to output
terminals.
n 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
Table 3.5 to set the carrier frequency to an appropriate level.
Table 3.5 Cable Length Between Drive and Motor
Cable Length 50 m or less 100 m or less Greater than 100 m
Carrier Frequency 15 kHz or less 5 kHz or less 2 kHz or less
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.
n 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.
3.4 Main Circuit Wiring
66 YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide