Bus bar protection refers to the safeguarding of bus bars from faults occurring within the bus bar section. Current Differential Protection: This protection method connects CT secondaries in parallel and. If a fault occurs on a busbars, considerable damage and disruption of supply will occur unless some form of quick-acting automatic protection is provided to isolate the faulty busbar. So, a busbar is the electric one which is stated as either a single or array of conducted employed for accumulating electric power from the incoming feeder devices and delivers it to the outgoing feeder devices.