5. Consider the one-ine diagram shown below. The three-phase transformer bank is made up of three identical single-phase transformer, each specified by X1-0.004 Ω (on the high-voltage side), negl...
please solve the question in pu sysyem !!!! Solvein pu sysvem 2-10. A 13,800/480 V three-phase Y-A-connected transformer bank consists of three identical 100-kVA 967/480-V transformers. I is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one of these transformers are Isc 12.6 A Pc3300 w (a) If this bank delivers a rated load at 0.85 PF lagging and rated voltage, what is the line-to-line voltage on...
Three single-phase transformers are connected in delta-delta configuration to step up a line voltage of 8 kV to 120 kV. A 24 MVA load at angle 30 is connected to the high voltage side. Calculate: a) Transformer turns ratio b) Load power in MW c) Line current in HV and LV sides d) The apparent power supplied by each transformer e) If one transformer is removed for maintenance, what is the reduction percentage in the transformer bank power rating with...
Problem 5: (15 points) Consider a one-line diagram shown below: V1 V2 10240° kVLL Ti Zline -50 2/phase D1 e 1002-45° A/phase ΥΆ D2 ,-1500L-459A/phase İttiphong Leevongwat Page 1 of 2 ENEE-3522 Fall 2018 Homework 4 T is Y-Y transformer rated 50 MVA3φ, 23/230 kViL with leakage reactance of 0.1 Ω/phase. Low-voltage side (primary) is connected to the generator. T2 is Y-A transformer made up of three identical single-phase transformers each rated 15 MVA1φ, 132/11 kV with leakage reactance of...
Transformer TI : 50 MVA, 10 kV Y/138 kV Y, X=0.10 per unit; Transformer T2: 100 MVA, 15 kV D/138 kV Y, X-0.10 per unit; Each 138-kV line: X1-400 A three-phase short circuit occurs at bus 5, where the prefault voltage is 15 kV. Prefault load current is neglected. (a)Draw the positive-sequence reactance diagram in per-unit on a 100-MVA, 15-kV base in the zone of generator G2. Determine: (b) the The'venin equivalent at the fault, (c) the subtransient fault current...