Application Precautions; General Application Precautions; I.3 Application Precautions - YASKAWA V1000 Quick Start Manual

i.3 Application Precautions

i.3

Application Precautions

u

General Application Precautions

n Selecting a Reactor
An AC reactor or DC link choke can be used for the following:
• 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.
Note: A DC link choke is built in to 200 V and 400 V class models with a capacity of 22 kW and higher (HD
rating).
Power Supply
Capacity (kVA)
n
Drive Capacity
Make sure that the motor rated current is less than the rated nameplate output current of the
drive. When running more than one motor in parallel from a single drive, the drive rated current
should 1.1 times larger than the total motor rated current for all connected motors or nuisance
drive faults may occur.
n Starting Torque
The overload rating of the drive determines the starting and accelerating characteristics of the
motor. Expect lower running torque than when running the motor from line power. To get
more starting torque, use a larger drive or increase both the motor and drive capacity.
18
4000
Power supply harmonics
reactor required
600
0
Figure i.3 Installing a Reactor
YASKAWA ELECTRIC TOEP C710606 47A YASKAWA AC Drive – V1000 Quick Start Guide
Reactor
unnecessary
60
Drive Capacity (kVA)
400