Connecting An Ac Or Dc Reactor; Connecting A Noise Filter - YASKAWA T1000A Technical Manual

8.5 Installing Peripheral Devices
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
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
wiring.
Figure 8.12
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.
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A B
A – Power supply
B – MCCB
Figure 8.11 Connecting an AC Reactor
A
A – Power supply
B – MCCB
Figure 8.12 Connecting a DC Reactor
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
C D
U X R/L1
V Y S/L2
W Z T/L3
C – AC reactor
D – Drive
Figure 8.12
C
B
R/L1
S/L2
T/L3
+ 1 + 2
D
C – Drive
D – DC reactor
for an example of DC reactor