NOTICE: Use a magnetic contactor (MC) to ensure that power to the drive can be completely shut off when necessary. The MC should bewired so that it opens when a fault output terminal is triggered.Note: 1. Install an MC to the drive input side to prevent the drive from restarting automatically when power is restored after momentary powerloss.2. Set up a delay that prevents the MC from opening prematurely to continue operating the drive through a momentary power loss.u Connecting an AC ReactorAC reactors suppress surges in current and improve the power factor on the input side of the drive.Use an AC reactor in the following situations:• 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 reactor when also connecting a thyristor converter (such as a DC drive) to the same power supply system, regardless of theconditions of the power supply.n Connecting an AC ReactorNote: Set C6-02 to 1 (Carrier Frequency Selection to 2.0 kHz) when connecting an AC reactor to the output side (secondary side) of the drive.BAC DR/L1UVWXYZS/L2T/L3A – Power supplyB – MCCBC – AC reactorD – DriveFigure 6.9 Connecting an AC Reactoru Connecting a Surge AbsorberA surge absorber suppresses surge voltage generated from switching an inductive load near the drive. Inductive loads includemagnetic contactors, relays, valves, solenoids, and brakes. Always use a surge absorber or diode when operating with aninductive load.WARNING! Fire Hazard. Due to surge absorber short circuit on drive output terminals U/T1, V/T2, and W/T3, do not connect surge absorbersto the drive output power terminals. Failure to comply may result in serious injury or death by fire or flying debris.u Connecting a Noise Filtern Input-Side Noise FilterDrive outputs generate noise as a result of high-speed switching. This noise flows from inside the drive back to the powersupply, possibly affecting other equipment. Installing a noise filter to the input side of the drive can reduce the amount of noiseflowing back into the power supply. This also prevents noise from entering the drive from the power supply.• Use a noise filter specifically designed for AC drives.• Install the noise filter as close as possible to the drive.6.5 Installing Peripheral DevicesYASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual 2536 Peripheral Devices &Options
