Improving The Power Factor; Connecting An Ac Reactor Or Dc Reactor - YASKAWA GA700 Technical Manual

2.20

Improving the Power Factor

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Connecting an AC Reactor or DC Reactor

Use an AC reactor or a DC reactor to suppress sudden current surges or harmonic current. By suppressing
harmonic current, an improvement in the power factor at the drive's input side is also implemented.
Connect an AC reactor or a DC reactor the input side (primary side) in the following situations: An AC reactor
and DC reactor can be used in combination.
• To suppress harmonic current or improve the power factor of the power supply.
• When there is switching of phase advancing capacitor.
• With a large capacity power supply transformer (over 600 kVA).
Note:
The main circuit terminal block for the drive, and the terminal blocks for the AC and DC reactors come in different shapes. The drive
comes with a European style terminal block, and the AC and DC reactors come with a round terminal block. Take due care when
preparing the ends of the wires.
■
Connecting a AC Reactor
Note:
When connecting an AC reactor to the output side (secondary side) of the driver, set C6-02 = 1 [Carrier Frequency Selection = 2.0
kHz].
A - Power supply
B - MCCB
■
Connecting a DC Reactor
When installing a DC reactor, remove the jumper between terminals +1 and +2. Do not remove the jumper
between terminals +1 and +2 if a DC reactor will not be connected. Refer to the following figure to wire the DC
reactor.
A - Power supply
B - MCCB
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
C - AC reactor
D - Drive
Figure 2.66 AC Reactor Connection Example
C - Drive
D - DC reactor
Figure 2.67 DC Reactor Connection Example

2.20 Improving the Power Factor

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