Multi-Terminal Line Differential

Multi-Terminal Line Differential Protection

In a “perfect” world all transmission lines are two terminals with no tapped loads.  Regrettably, the cost of circuit breakers, with their associated disconnects, foundations and buswork, frequently precludes this “perfection” for many transmission and subtransmission lines. These lines, with multiple terminals and tapped loads, must still be protected.  Tripping speeds must be sufficient to maintain system stability and limit damage to transformers and other primary equipment feeding the fault.  More

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