When we have more than two feeders coming from the utility (may be two different substations) & feeding double ended MV switchgear at two sections, the two sections feeding an interconnected loop (no of RMU+XFMR), my question regarding the requirements for this loop when both sections are energized & we've two different circuits from different sources, is it mandatory to keep an opened breaker in this loop?
If no, do we need a synchronization panel to manage the parallel operation?
If no, do we need a synchronization panel to manage the parallel operation?