(b) A 2.89kV/230V single phase transformer used in a local distribution network has the equivalent circuit parameters shown in Table Q3b. Determine: (i) The transformer turns ratio. (ii) The secondary voltage, current and power (W) given a 10 2 resistive load. (iii) The efficiency and voltage regulation at this load. (iv) The load power when operating the transformer at maximum efficiency. The transformer primary current and power factor when operating under no load (open circuit) conditions. (v) hase e . - atonc 11 L T atina Parameter Value Units Re 46 10 Хм Rieg Xieq 78 200 Ω Table Q3b

(b) A 2.89kV/230V single phase transformer used in a local distribution network has the equivalent circuit parameters shown in Table Q3b. Determine: (i) The transformer turns ratio. (ii) The secondary voltage, current and power (W) given a 10 2 resistive load. (iii) The efficiency and voltage regulation at this load. (iv) The load power when operating the transformer at maximum efficiency. The transformer primary current and power factor when operating under no load (open circuit) conditions. (v) hase e . - atonc 11 L T atina Parameter Value Units Re 46 10 Хм Rieg Xieq 78 200 Ω Table Q3b

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.16MCQ: In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across...

See similar textbooks

Similar questions

P2-Draw the equivalent circuit of a single-phase transformer and explain how the core losses are almost invariant to the load (current). How do they depend on the terminal voltages of the transformer? Also, using the equivalent circuit explain how the copper losses depend on the load current.
Q2/3-phase.E.W.C. R using center tap transformer supplies highly inductive load, find: 1. The average load voltage with and without FWD and discusses these cases. 2-lf firing angle equal to 45°, the supply voltage is240v, transformer ratio is (2/1). Calculate the DC current& voltage of this case. 3- Draw all waveforms diagram. 4- what are the difference between the type of connection (Delta or Star).
With base MVA of 150 and base voltage of 33. If the reactance of the transformer is 0.23 pu. The parameter of the reactance of the transformer in the Neplan software is O 1.66 2.30 23 0.23 O Non of them
Q2 : A) For a single phase transformer, what is the condition of maximum efficiency? B) Draw the approximate equivalent circuit of single phase transformer referred to secondary and write equations for this case.
(b) A single phase transformer has the parameters shown on Table Q3 and is connected to a 230 V and 50 Hz AC supply. Sketch the equivalent circuit and using this determine: (i) The Secondary voltage under Open Circuit (Vsoc) (ii) The Secondary voltage, current and power (W) given a 0.6 N resistive Load. (iii) The efficiency and voltage regulation at this load (c) Through suitable calculations determine whether the size, weight or cost of this transformer could be reduced such that it operated below a maximum flux density of 1.3 T and the current density in both windings was limited to around 5A/mm2 for this load. Parameter Value Units Definition RC 1400 Ω Core Loss Resistance XM 400 Ω Rleq Xleq Np Ns Magnetising Reactance Equivalent Winding Resistance Equivalent Leakage Inductance Number of turns in primary winding Number of turns in secondary winding Iron Core cross section 2.4 Ω 100 10 10,000 3 Ac mm2 Dwp Dwr Primary winding wire diameter Secondary winding wire diameter mm mm Table…
A 50 Hz 1-phase transformer has a turn-ratio of 6. The resistances are 0.90 ohm and 0.03 ohm and the reactance’s 5 ohm and 0.13 Q for high voltage and low voltage respectively. Determine (a) the voltage to be applied to the high voltage side to obtain full load current of 200 A in the low voltage winding on short circuit (b) the p.f. on short circuit.
Q2. derive formula For Construction of current transformer (C.T) (in clamp type meter)?
Q1. Describe the following related to Current Transformer (CT): (i) Draw the equivalent circuit diagram of CT and develop the corresponding phasor diagram. Draw the transient response of CT and describe the transient errors in a CT. [5] [5] (ii)
A typical single-phase transformer has a certain value of voltage regulation when connected to the load. If the voltage regulation is equal to zero, what is the behavior of the load connected to the transformer?
FN.Q5 – A Transformer has primary windings as Np = 720 and secondary windings as Ns = 144. Its secondary voltage is Vs = 42V and output power of the transformer is PN= 2750W. The value of loses powers are Pcu = 52,5W and Pre = 39W. The resistance of loads are RLI = 1,660 and R12 = 1,950. (Pcu and PFE will be considered to be approximately the same in different load values.) Determine the following values in the circuit: Primary winding Secondary winding N, turns Ng turns Magnetic Flux, Primary current ISL Secondary 4 current Primary voltage ISL1 (ISL2 Secondary voltage RL1 R12 Transformer Core (a) the primary voltage VP, (b) the secondary load current Isı, if the transformer is rated at RLI and R12, (c) the primary load current IpL, (d) the load resistance R13 when the transformer is fully loaded by third in parallel, (e) efficiency n (fully loaded)
bị (a) Discuss THREE (3) important roles of the instrument current transformer (CT) and voltage transformer (VT) in power system operation.
During the load test of single-phase transformer, when the secondary terminal voltage increases, the regulation of the transformer will ................?(complete)