MCSAAC380~480V50/60 Hz400 / 200 VMCCB MCMCThree-PhaseTransformerR/L1MBMCS/L2T/L3DriveFigure 7.3 Connecting a MCCB (Three-Phase 400 V Class)WARNING! Electrical Shock Hazard. Disconnect the MCCB and MC before wiring terminals. Failure tocomply may result in serious injury or death.u Installing a Leakage BreakerDrive outputs generate high-frequency leakage current as a result of high-speed switching.Install a Ground Fault Circuit Interrupter (GFCI) on the input side of the drive to switch offpotentially harmful leakage current.Factors in determining leakage current:• Size of the AC drive• AC drive carrier frequency• Motor cable type and length• EMI/RFI filterIn order to safely protect the drive system, select a breaker that senses all types of current (ACand DC) and high frequency currents.Note: Choose a GFCI designed specifically for an AC drive. The operation time should be at least 0.1 second withsensitivity amperage of at least 200 mA per drive. The output waveform of the drive may cause the leakagecurrent to increase. This may, in turn, cause the leakage breaker to malfunction. Take the following stepsto correct the problem:• Increase the sensitivity amperage.• Lower the carrier frequency.u Installing a Magnetic Contactorn Disconnecting the Power SupplyThe drive can be shut off in the case of a fault in external equipment such as braking resistorsthrough use of a Magnetic Contactor (MC).7.4 Installing Peripheral Devices172 YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
