Yaskawa A1000 6-Phase/12-Pulse Input - Manual (Page 7)

NOTICE
Observe proper electrostatic discharge procedures (ESD) when handling the drive and circuit boards. Failure to
comply may result in ESD damage to the drive circuitry.
Do not perform a withstand voltage test on any part of the drive.
Failure to comply could result in damage to the sensitive devices within the drive.
Do not operate damaged equipment.
Failure to comply could result in further damage to the equipment. Do not connect or operate any equipment with visible
damage or missing parts.
If a fuse is blown or a Ground Fault Circuit Interrupter (GFCI) is tripped, check the wiring and the selection of the
peripheral devices.
Contact your supplier if the cause cannot be identified after checking the above.
Do not restart the drive immediately operate the peripheral devices if a fuse is blown or a GFCI is tripped.
Check the wiring and the selection of peripheral devices to identify the cause. Contact your supplier before restarting the
drive or the peripheral devices if the cause cannot be identified.
Do not expose the drive to halogen group disinfectants.
Failure to comply may cause damage to the electrical components in the drive.
Do not pack the drive in wooden materials that have been fumigated or sterilized. Do not sterilize the entire package after
the product is packed.
n General Application Precautions
Selection
Installing a Transformer
Install a 6-Phase/12-Pulse isolation transformer with each of the output windings phase shifted by 30 electrical degrees or
install a Hybrid 6-Phase topology on the power supply.
Installing a Reactor
Use an AC reactor or DC link choke in the following situations:
• to suppress harmonic current.
• to smooth peak current that results from capacitor switching.
• when the power supply is above 600 kVA.
• when the drive is running from a power supply system with thyristor converters.
4000
600
0
60 400
Drive Capacity (kVA)
Power Supply
Capacity (kVA)
Power supply harmonics
reactor required
Reactor
unnecessary
Figure Installing a Reactor
Inspection and Maintenance
WARNING! Electrical Shock Hazard. Capacitors for the control power supply do not immediately discharge after shutting off the power.
Wait for at least the amount of time specified on the drive before touching any components after shutting off the power. Failure to comply
may cause injury to personnel from electrical shock.
1 Preface
YASKAWA TOEP YAIA1U 02A YASKAWA AC Drive – A1000 6-Phase/12-Pulse Input Installation Manual 7