YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 2957.4 Installing Peripheral DevicesPeripheral Devices &Options77.4 Installing Peripheral DevicesThis section describes the proper steps and precautions to take when installing orconnecting various peripheral devices to the drive.• Refer to peripheral device manual for detailed installation instructions.NOTICE: Use a class 2 power supply (UL standard) when connecting to the control terminals.Improper application of peripheral devices could result in drive performance degradation dueto improper power supply.◆ Installing a Molded Case Circuit BreakerInstall a molded case circuit breaker (MCCB) for line protection between thepower supply and the main circuit power supply input terminals R/L1, S/L2 andT/L3. This protects the main circuit and devices wired to the main circuit whilealso providing overload protection.Consider the following when selecting and installing a MCCB:• The capacity of the MCCB should be 1.5 to 2 times the rated output current ofthe drive.• Select an MCCB with slow time characteristics to prevent:-Nuisance OL2 tripping and fault detection of the drive.-Nuisance tripping due to inrush current when applying power to the drive.• Install a 400/200 V transformer when using a 400 V class power supply input.• Try to avoid using several drives connected to one MCCB. If too many drives areconnected to one MCCB, the MCCB rating may be too high to safely trip in caseof a single drive overload or fault.◆ Installing a Leakage BreakerDrive outputs generate high-frequency leakage current as a result of high-speedswitching. Install a Ground Fault Circuit Interrupter (GFCI) on the input side of thedrive to switch off potentially harmful leakage current.Factors in determining leakage current:• Size of the AC drive• AC drive carrier frequency
