A single-phase transformer is rated at 110/33 kV,50 MVA. It is to be protected by a differential relay with input taps of 3.0, 4.0, 4.8, 5.0, 5.2, and 6.0 A secondary. The available current ratios are shown in Figure Q2(c). Calculate the CT ratio mismatch. Current Ratios 50:5 100:5 150:5 200:5 250:5 300:5 400:5 600 :5 2000:5 450:5 500:5 800:5 900:5 1000:5 1200:5 1500:5 1600:5 2400:5 2500:5 3000:5 3200:5 4000:5 5000:5 6000 :5

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Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.