QUESTON 2 A single-phase transformer bank has a rating of 30 MVA, 132kV/33 kV. By referring to the standard current tran

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Queston 2 A Single Phase Transformer Bank Has A Rating Of 30 Mva 132kv 33 Kv By Referring To The Standard Current Tran 1 (58.86 KiB) Viewed 46 times

QUESTON 2 A single-phase transformer bank has a rating of 30 MVA, 132kV/33 kV. By referring to the standard current transformer (CT) ratio in Table Q2, design a differential protection scheme for the protection of the transformer against internal fault. In the event of an internal fault in the transformer, 250 A of current flows through the high voltage (HV) side, while 750 A flows through the low voltage (LV) side. By evaluating this phenomenon, justify whether the differential relay will cause the circuit breaker to trip. (State any assumptions made) 50:5 450:5 1500:5 4000:5 100:5 500:5 1600:5 5000:5 150:5 600:5 2000:5 6000:5 Table Q2 CT Ratios 200:5 800:5 2400:5 250:5 900:5 2500:5 300:5 1000:5 3000:5 (20 marks) 400:5 1200:5 3200:5