Install a MCCB for line protection between the power supply and the main circuit power supply input terminals R/L1, S/L2 and T/L3. This protects the main circuit and devices wired to the main circuit while also providing overload protection.Consider the following when selecting and installing an MCCB:• The capacity of the MCCB should be 1.5 to 2 times the rated output current of the drive. Use an MCCB to keep the drivefrom 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 an MCCB is shared with other equipment, use a sequence that shuts thepower OFF when errors are output by using magnetic contactor (MC) as shown in the following figure.