User talk:Softech02

Select Before Operate
SBO(Select Before Operate) is a kind of trip/release operation for switchgears using select arm operation to lock out before operating control commands from the operation center. Most of SCADA system adopted SBO as basic operation method for switchgears because it prevents the system from operator's mistakes, unstable operations, dupicate controls. On the other hand, control output operation for switchgears without prior select arm action is called direct operation. Direct operations are somtimes used to control lock/unlock relay of switches in the electric power distribution network.