Electrical distribution networks incorporating means for sectionalizing faulted load sections

摘要

Disclosed are alternate embodiments of a power distribution network having a pair of branches with load sections coupled to each branch, a pair of feeders providing not only the "Preferred" source of power to the load sections of each branch during normal operation, but respectively providing an "Emergency" source of power to a load section of the other branch under certain load fault conditions. An auxiliary emergency power source is additionally provided for each branch, a switching system incorporating a plurality of series connected load break switches and vacuum interrupters automatically controlled for isolating the faulted section and transferring the remaining sections to the respective power sources. One of the embodiments disclosed includes means for preventing such isolation and transference in the event of a temporary or short-term fault.