Automatic circuit recloser with improved coordinating ability

Claim 1

AN AUTOMATIC CIRCUIT RECLOSER COMPRISING A PAIR OF SEPARABLE CONTACTS, MEANS FOR OPENING SAID CONTACTS IN RESPONSE TO AN ABNORMAL CURRENT CONDITION, MEANS FOR AUTOMATICALLY RECLOSING SAID CONTACTS FOLLOWING AN OPENING OPERATION, NORMALLY-INACTIVE TIME DELAY MEANS OPERABLE WHEN ACTIVE TO DELAY AN OPENING OPERATION OF SAID RECLOSER FOR A CONTROLLED PERIOD FOLLOWING INITIATION OF AN ABNORMAL CURRENT CONDITION, SEQUENCING MEANS RESPONSIVE TO OPERATIONS OF SAID RECLOSER FOR RENDERING SAID TIME DELAY MEANS ACTIVE AFTER A PREDETERMINED NUMBER OF OPENING OPERATIONS TO DELAY THE NEXT SUCCEEDING OPENING OPERATION IN A SERIES OF CLOSELY-SUCCESSIVE OPENING OPERATIONS, AND CONTROL MEANS SENSITIVE TO AN ABNORMAL CURRENT CONDITION OF A DURATION INSUFFICIENT TO CAUSE OPENING OF SAID RECLOSER FOR CAUSING SAID SEQUENCING MEANS TO RENDER SAID TIME DELAY MEANS ACTIVE DURING THE NEXT ABNORMAL CURRENT CONDITION CLOSELY FOLLOWING TERMINATION OF SAID ABNORMAL CURRENT CONDITION OF INSUFFICIENT DURATION, SAID CONTROL MEANS BEING OPERABLE TO RENDER SAID TIME DELAY MEANS ACTIVE DURING SAID NEXT ABNORMAL CURRENT CONDITION EVEN WHEN THE LINE VOLTAGE AT SAID RECLOSER REMAINS AT A NORMAL LEVEL.