8.5 Installing Peripheral Devices
346 YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
u Connecting an AC or DC Reactor
AC and DC reactors suppress surges in current and improve the power factor on the input side of the drive.
Use a DC reactor or AC reactor or both:
• To suppress harmonic current or improve the power factor of the power supply.
• When using a phase advancing capacitor switch.
• With a large capacity power supply transformer (over 600 kVA).
Note: Use an AC or DC reactor when also connecting a thyristor converter (such as a DC drive) to the same power supply system,
regardless of the conditions of the power supply.
n Connecting an AC Reactor
Figure 8.11
Figure 8.11 Connecting an AC Reactor
n Connecting a DC Reactor
A DC reactor can be installed to drive models CIMR-T2A0004 to 0081 and CIMR-T4A0002 to 0044. When
installing a DC reactor, ensure the jumper between terminals +1 and +2 (terminals are jumpered for shipment) is
removed. The jumper must be installed if no DC reactor is used. Refer to Figure 8.12 for an example of DC reactor
wiring.
Figure 8.12
Figure 8.12 Connecting a DC Reactor
u Connecting a Noise Filter
n Reducing Radiated, Conducted, and Induced Noise
Drives generate noise that can potentially affect surrounding devices like PLCs, etc.
• Radiated Noise: Electromagnetic waves noise throughout the radio bandwidth radiated from the drive and cables.
• Conducted Noise: Noise generated by the drive and emitted to through the power lines.
• Induced Noise: Noise generated by electromagnetic induction can affect control signal lines.
Take the following measurements to prevent noise causing malfunction of other drives or devices:
• Install all components on a well grounded metal plate.
• Keep the motor cable as short as possible.
• Use noise filters on the input side of the drive to reduce conducted noise.
• Install noise filters on the input and output side of the drive, install the drive in a metal enclosure panel and use a
shielded motor cable to reduce radiated noise.
A–Power supply C–AC reactor
B – MCCB D – Drive
A–Power supply C–Drive
B – MCCB D – DC reactor
BA
CD
R/L1 U
V
W
X
Y
Z
S/L2
T/L3
A
C
D
R/L1
B
S/L2
T/L3
1+2+
To Next Page
Loading...
Need help?
General
