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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 82.
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.
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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 3.17 when using multiple drives. Do not loop the ground wire.
A
B
A
A – Correct B – Incorrect
Figure 3.17 Multiple Drive Wiring
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Wiring the Main Circuit Terminal
WARNING! Electrical Shock Hazard. Shut off the power supply to the drive before wiring the main circuit terminals. Failure to comply may result in death or serious injury.
Note: 1. A cover placed over the DC Bus and braking circuit terminals prior to shipment helps prevent miswiring. Cut away covers as needed for terminals with a needle-nose pliers.
A
A – Protective Cover to Prevent Miswiring
2. The ground terminal screw on IP20/NEMA Type 1 holds the protective cover in place.
Main Circuit Connection Diagram
For drive main power circuit connections, refer to
Figure 3.3 and Figure 3.4 on page 36.
WARNING! Fire Hazard. The braking resistor connection terminals are B1 and B2. Do not connect braking resistors to any other terminals. Improper wiring connections could
cause the braking resistor to overheat and cause death or serious injury by fire. Failure to comply may result in damage to the braking circuit or drive.
3.6 Main Circuit Wiring
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
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Electrical Installation
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