Mechanical & ElectricalInstallation22.20 Improving the Power FactorYASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual 912.20 Improving the Power Factor◆ Connecting an AC Reactor or DC ReactorUse an AC reactor or a DC reactor to suppress sudden current surges or harmonic current. By suppressingharmonic 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 reactorand 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 drivecomes with a European style terminal block, and the AC and DC reactors come with a round terminal block. Take due care whenpreparing the ends of the wires.■ Connecting a AC ReactorNote:When connecting an AC reactor to the output side (secondary side) of the driver, set C6-02 = 1 [Carrier Frequency Selection = 2.0kHz].A - Power supplyB - MCCBC - AC reactorD - DriveFigure 2.66 AC Reactor Connection Example■ Connecting a DC ReactorWhen installing a DC reactor, remove the jumper between terminals +1 and +2. Do not remove the jumperbetween terminals +1 and +2 if a DC reactor will not be connected. Refer to the following figure to wire the DCreactor.A - Power supplyB - MCCBC - DriveD - DC reactorFigure 2.67 DC Reactor Connection Example
