An Auto-transformer is a type of circuit used to derive two-phase power from a three- phase source or vice-versa. Select one: True False
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A: In a transformer MMF remains same i.e, I1N1=I2N2 amd in auto transformer total current is the…
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Q: Example 33.7. A 5,000-kVA, 3-phase transformer, 6.6/33-kV, NY, has a no-load loss of and a full-load…
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A: Need to find the true false
Q: The two winding transformer and the autotransformer of the circuit shown in Figure are ideal.…
A: In this question, Both transformers are ideal so no losses. We know in transformer I1/I2= N2/N1
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Q: Q2. Consider the single-phase transformer circuit shown below. Transformer ratings and reactances…
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Q: Q2. Consider the single-phase transformer circuit shown below. Transformer ratings and reactances…
A: new value of p.u impedance = old value of p.u impedance* ((New value of voltampers)/(old value of…
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Q: A 2.5 kVA, 200v/40V single-phase transformer has the primary resistance and reactance of 3 and 12 0,…
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Q: An Auto-transformer is a type of circuit used to derive two-phase power from a three- phase source…
A: This problem is based on the Auto transformer, It's is type of circuit used to derive two phase…
Q: Q1 : True / False 1. A transformer is a component that provides electrical isolation between two or…
A: "Since, you have asked a question with multiple parts, according to our guidelines, we can solve…
Q: A 2.5 kVA, 200V/40V single-phase transformer has the primary resistance and reactance of 3 and 12 0,…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: a) A 600KVA, single phase transformer when working at unity power efficiency 92% at full load and…
A: Given:600KVA , 92% efficiency at full load and half load under unity power factorsAt full load nFL=…
Q: Q2. Consider the single-phase transformer circuit shown below. Transformer ratings and reactances…
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Q: A 15 KVA, 2300:230 V transformer is to be tested to determine its excitation branch components, its…
A: As per our policy we can provider solution of first three questions only. Given: Q=15 KVAV1=2300…
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A: Referring to the given question, the load supplied is given as 12kW at 0.6 power factor lagging.…
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Q: A 2.5 kVA, 200V/40v single-phase transformer has the primary resistance and reactance of 3 and 12 0,…
A: The transformer has a primary and a secondary side. It converts electrical power to electrical power…
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Q: A 2.5 kVA, 200V/40V single-phase transformer has the primary resistance and reactance of 3 and 12 0,…
A: The transformer has a primary and a secondary side. It converts electrical power to electrical power…
Q: Example 32.72. A 300-kVA, single-phase transformer is designed to have a resistance of 1.5% and…
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Q: 6. A 5,000-kVA, 3-phase transformer, 6.6/33-kV, NY, has a no-load loss of 15 kV and a full-load loss…
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Q: A single-phase transformer is rated at 2 kVA, 240/120 V. The transformer is fully loaded by an…
A: The rating of the transformer is given as:
Q: A 250kVA, single phase transformer is designed to have a resistance of 1.5% and maximum efficiency…
A: Consider the resistance is 1.5% The kVA is 250 The load is 160 kW The power factor is 0.8 W
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A: Given: A transformer may be used to provide maximum power transfer between two AC circuits that have…
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Q: Q2. Consider the single-phase transformer circuit shown below. Transformer ratings and reactances…
A: We will use following formula of Zp.u to find Zpu on common on common base values Znew (P.u)=…
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A: Given 3-phase transformer having primary side in star connection as,
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- (a) An ideal single-phase two-winding transformer with turns ratio at=N1/N2 is connected with a series impedance Z2 across winding 2. If one wants to replace Z2, with a series impedance Z1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z1 in terms of Z2. (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance byat2 ?Consider a source of voltage v(t)=102sin(2t)V, with an internal resistance of 1800. A transformer that can be considered as ideal is used to couple a 50 resistive load to the source. (a) Determine the transformer primary-to-secondary turns ratio required to ensure maxi mum power transfer by matching the load and source resistances. (b) Find the average power delivered to the load, assenting maximum power transfer.An ideal transformer has no real or reactive power loss. (a) True (b) False
- The primary of a current transformer takes 1 A at a power factor of 0.4 when it is connected across a 200-V, 50Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of primary current?primary of a certain transformer takes 1 a at a power factor of 0.4 when it is connected acrossa 200-v, 50-hz supply and the secondary is on open circuit. the number of turns on the primary istwice that on the secondary. a load taking 50 a at a lagging power factor of 0.8 is now connectedacross the secondary. what is now the value of primary current ?Given Zo-j407 2, R₁143, R6317 52 and a 0.04, what is the magnitude of the source voltage Vs (in V rms) in the primary of the ideal transformer? Vs R₁ ww Answer: Zc Zc R₁ Use up to 2 digits after the decimal point if necessary in your answer below VL-28020 V TR
- 9- While conducting short-circuit test on a transformer the following side is short- circuited a) - H.V side , b) - Secondary side c) - L.V side d) - primary side 10- The power factor of a transformer on no load will be about a)- unity b)-o.75 c)- 0.5 d)- 0.35A 2,200/250-V transformer takes 8 A at a p.f. of 0.3 on open circuit. a. Find working components of no-load primary current. Note: use four decimal places b. Find magnetising components of no-load primary current. Note: use four decimal placesThe primary resistance of a 440/110-V transformer is 0.5 ohms and the secondary resistance is 0.04 ohms. When 440 V is applied to the primary and secondary is left open-circuited, 200 W is drawn from the supply. Find the secondary current which will give maximum efficiency and calculate this efficiency for a load having unity power factor.
- An ideal auto-transformer has its secondary winding labelled as a, b and c. The primary winding has 100 turns. The number of turns on the secondary side are 400 turns between a and b and 200 turns between b and c. The total number of turns between a and c is 600 turns. The transformer supplies a resistive load of 6 kW between a and c. In addition, a load of impedance 1,000 cis (45°) ohms is connected between a and b. For a primary voltage of 1,000 V, find the primary current and primary input power.A transformer is needed that will cause an actual load resistance of 25 Ω to appear as 100 Ω to an ac voltage source of 240 V rms. Draw the diagram of the circuit required. What turns ratio is required for the transformer? Find the current taken from the source, the current flowing through the load, and the load voltage.The no-load current of a transformer is 5 A at 0.3 power factor when connected across 200 V, 50 Hz supply. The number of turns on the primary is half that of the secondary. Find the primary current if a load taking 15 A at a lagging power factor of 80% is connected across the secondary