DURING NORMAL HOISTING OPERATIONS AN ELECTRICAL PROBLEM OCCURRED RESULTING IN HOISTING BEING SUSPENDED UNTIL REPAIRS WERE MADE. REPAIR REPLACEMENT OF THE FAILED ELEC. RELAY CAUSED THE HOIST TO REMAIN INOPERABLE FOR 5 HRs & 35 MIN. MSHA NOTIFICATION WAS GIVEN WITHIN 30 MINS. OF THE PROBLEM OCCURRING & IMMEDIATELY AFTER THE HOIST WAS AGAIN OPERATIONAL.