Method of coordinating and incorporating an electrical transformer station breaker's low-set relay with a recloser in an electric power distribution line with a fuse-saving scheme

A protection system for use in an electrical power distribution system that is susceptible to temporary or permanent electrical faults or combinations thereof, said system including a short distribution feeder line and at least one lateral line coupled to the short distribution feeder line, the short distribution feeder line having a first end coupled to at least one electrical transformer station, whereupon electrical power is provided to the short distribution feeder line and the at least one lateral line having at least one fuse, said protection system being configured for localizing an electrical fault in a portion of the electrical power distribution system and comprising:

• at least one station circuit breaker and at least one station breaker programmable relay located in said short distribution feeder line upstream of said at least one lateral line, said at least one station breaker programmable relay comprising a low-set instantaneous overcurrent relay;
• at least one recloser breaker and at least one recloser relay located in said short distribution feeder line downstream of said electrical transformer station;
• and
• wherein said low-set instantaneous overcurrent relay is programmed with a first predetermined time delay to enable coordination between said at least one station circuit breaker and said at least one recloser breaker to localize an electrical fault located in said at least one lateral line located downstream of said at least one station circuit breaker while minimizing impact on a fuse-saving range of said at least one fuse, said fuse-saving range being defined as a range of currents of an electrical fault that can be localized without said at least one fuse having to open.