Main Circuit Terminal Power Supply And Motor Wiring - YASKAWA V1000 Technical Manual

3.6 Main Circuit Wiring
<2> Gauges listed here are for use in the United States.
<3> Gauges listed here are for use in Europe and China.
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: 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.
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.
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.
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 3.15 when using multiple drives. Do not loop the ground wire.
A – Correct
60
Refer to C6-02: Carrier Frequency Selection on page 151
Table 3.5 Cable Length Between Drive and Motor
50 m or less
15 kHz or less
A
Figure 3.15 Multiple Drive Wiring
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
100 m or less
5 kHz or less
B
A
B – Incorrect
Greater than 100 m
2 kHz or less