u Installing a Molded Case Circuit Breaker (MCCB) or Ground Fault Circuit Interrupter(GFCI)Install an MCCB or GFCI for line protection between the power supply and the main circuit power supply input terminalsR/L1, S/L2, and T/L3. This protects the main circuit and devices wired to the main circuit while also providing overloadprotection.NOTICE: Prevent Equipment Damage. Install a fuse and a GFCI to models 4A0930 and 4A1200, Failure to comply may result in damageto the power supply in the event of a short circuit.Consider the following when selecting and installing an MCCB or GFCI:• The capacity of the MCCB or GFCI should be 1.5 to 2 times the rated output current of the drive. Use an MCCB or GFCIto keep the drive from faulting out instead of using overheat protection (150% for one minute at the rated output current).• If several drives are connected to one MCCB or GFCI that is shared with other equipment, use a sequence that shuts thepower OFF when errors are output by using magnetic contactor (MC) as shown in Figure 8.13.R/L1MBMCCB or GFCIABMCMCMCMCS/L2T/L3C SAA – Power supplyB – DriveC – Control power supplyFigure 8.13 Power Supply Interrupt Wiring (Example)WARNING! Electrical Shock Hazard. Disconnect the MCCB (or GFCI) and MC before wiring terminals. Failure to comply may result inserious injury or death.n Application Precautions when Installing a GFCIDrive outputs generate high-frequency leakage current as a result of high-speed switching. Install a GFCI on the input side ofthe drive to switch off potentially harmful leakage current.Factors in determining leakage current:• Size of the AC drive• AC drive carrier frequency• Motor cable type and length• EMI/RFI filterIf the GFCI trips spuriously, consider changing these items or use a GFCI with a higher trip level.Note: Choose a GFCI designed specifically for an AC drive. The operation time should be at least 0.1 s with sensitivity amperage of at least 200mA per drive. The output waveform of the drive and built-in EMC filter may cause an increase in leakage current. This may in turn causethe leakage breaker to malfunction. Increase the sensitivity amperage or lower the carrier frequency to correct the problem.u Installing a Magnetic Contactor at the Power Supply SideInstall a magnetic contactor (MC) to the drive input for the purposes explained below.n Disconnecting the Power SupplyShut off the drive with an MC when a fault occurs in any external equipment such as braking resistors.NOTICE: Do not connect electromagnetic switches or MCs to the output motor circuits without proper sequencing. Improper sequencing ofoutput motor circuits could result in damage to the drive.NOTICE: Install an MC on the input side of the drive when the drive should not automatically restart after power loss. To get the fullperformance life out of the electrolytic capacitors and circuit relays, refrain from switching the drive power supply off and on more than onceevery 30 minutes. Frequent use can damage the drive. Use the drive to stop and start the motor.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.8.5 Installing Peripheral DevicesYASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual 3858 Peripheral Devices &Options
