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【正文】 ferential– Loads– Capacitor banks– Application with overcurrent and distance relays? Combined bus and transformer zone? Buses with directly connected grounding transformers? Application of auxiliary transformers– Generally discouragedApplication of bus protection? Applications with paralleled CTs– Generally discouraged– Guidelines includedApplication of bus protection? Application of auxiliary tripping relays– Lockout relays– Nonlockout relays– Ratings ? Automatic reclosing after bus faults? Dynamic bus replica? Checkzone? Voltage trip supervisionDynamic bus replicaPosition of switches and breakers“If not opened, then closed” logicInservice transferInservice transferInservice transferCheck zoneCheck zoneApplication of bus protection? Application of CT trouble detection– Detection methods– Fallback strategies? Reliable, selective tripping at the differential zone boundary– Lineside CT– Busside CT– Bus coupler considerations– The role of Breaker Failure protectionLineside CTBus coupler considerationsBus coupler considerationsApplication of bus protection? CT column ground fault protection? Inzone grounds– Surge arresters– Safety grounds and circulating current while testing– Inzone grounding of outofservice elements? Inservice transfer of work elements and breaker substitutionBreaker substitutionApplication of bus protection? Stub bus considerations? Breaker Failure considerations? Backup protection–Local backup? Duplicated relays? BF, batteries, wiring? Reverselooking distance relays? Overcurrent relays–Remot
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