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Refer to the transformer shown in Figure 28-14 and find all the missing values.
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Delmar's Standard Textbook Of Electricity
- In the single-phase, three- winding, transformer, the primary current is equal to lo at the condition of ints there is no load on tertiary windings the current in secondary windings equal to zero the resistances (R1, R2, and R3) in transformer windings are equal the inductances (L1, L2, and L3) in transformer windings are equal.arrow_forwardQuestion 10 Not yet answered Marked out of Previous page BE The results from the DC test of a single phase transformer are: Vdc-14v and ldc 1.5A, the DC resistance are equal to: O a. O b. OC. O d. 12.50. 8.450 9.3302. 16.250. Time left 0:26:1 hp Next pagearrow_forwardexplain how the type of loading affects the voltage regulation of a transformerarrow_forward
- The picture shown below is a. Step-Up Transformer b. None of the choices c. Step-Down Transformerarrow_forwardIn shall type of transformer windings are wound on two separate limbs of the iron core True Falsearrow_forwardThe number of turns of the primary winding of a single phase transformer is N1=600 and the transformer ratio is 20. Number of turns of the secondary winding is * 3.arrow_forward
- 27 What way the two electrical circuits are linked in transformer to change the values of alternating voltages and currents? a. Ferromagnetic core b. Secondary Winding c. Mutual induction d. Primary Windingarrow_forwardQ3-A)-Indicate whether the following statements are true or false and correct the false statements The short encurt test of 2- 3- The output po 4- The load losses in transformer depends upon voltage and frequency. 5- Hysteresis loss in a transformer varies as maximum flux density. 6- If the reactance/resistance ratios of the two parallel transformers are not equal, the power factor of the load will be equal. 7- Power transformers are generally designed for maximum efficiency around 75% of full load. 8- The full-load copper loss of a transformer is 1600 W. At half load, the copper loss will be 400 W.arrow_forwardThe correct choice on working principle of Transformer is based on a. Mutual Induction b. Different voltage values c. Different winding turns d. Same Voltagearrow_forward
- 02. A certain transformer operating at a particular frequency has equal hysteresis and eddy current losses. If the voltage and frequency are doubled, the ratio of the hysteresis and eddy current losses is (a) 1:1 (c) 2:1 (b) 1 : 2 (d) 1:4arrow_forwardDetermine the magnitude of transformer A winding voltage E1 and magnitude of Voltage source.arrow_forwardA fault occurs at point F of the system in the figure. Calculate the sub-transient current in phase c of machine 1, assuming that the currents before the fault are zero. Both machines have a nominal capacity of 1200 kVA, 480 V, with reactances X”=X2= 11% and X0 = 3.5%. The nominal capacity of each three-phase transformer is 1200 kVA, 480 V Δ/ 2400 V and with reactances X1=X2=X0= 6%. Transmission line reactances are X1=X2=22% and X0 = 35% on a 1200 kVA, 2400 V basis. Neutral grounding reactor reactances are 8% on a kVA and kV basis. of the machines. a) Calculate the fault current if a ground fault occurs in phase a, b) The fault current if it is a line-to-line fault c) the voltage in phase b and c for the line-to-ground fault in phase a .arrow_forward
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning