A 2.5 kVA, 200V/40v single-phase transformer has the primary resistance and reactance of 3 and 12 0, respectively. On the secondary side, these values are 0.3 and 0.1 0, respectively. Draw & Find the parameters of equivalent impedance referred to the primary and the secondary and the circuit.
Q: True or False? Consider a 3 phase transformer with same line to line voltage ratio. The delta…
A: Delta to Delta transformer: The primary phase current is,I1=13IL1The secondary phase currennt…
Q: A single-phase transformer rated 75kVA, 8000/240V is given the short circuit test. With the…
A: Rated current in primary side =75*1038000=9.375 amp Short circuit test is done with secondary side…
Q: A 250 MVA, 11/400 kV 3-phase power transformer has a leakage reactance of 0.05 pu on the base of 250…
A: Given values are - Rating=250MVAVLVH=11400Xpu=0.05
Q: Example 1: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results:…
A:
Q: 2. If a 250MVA,11/400 KV, Three –Phase power Transformer has leakage reactance of 0.05 pu on the…
A:
Q: Consider Figure 1 of the text. For an ideal phase-shifting transformer, the impedance is unchanged…
A: Whenever the impedance is seen from the other side of the transformer it is given as:
Q: 2. A 3-phase, 6,600/415-V, 2,000-kVA transformer has a per unit resistance of 0.02 and a per unit…
A:
Q: a 200kVA, 4000V/2000V, 50Hz single-phase transformer has 100 secondary turns. The transformer…
A:
Q: A 2.5 kVA, 200v/40V single-phase transformer has the primary resistance and reactance of 3 and 12 0,…
A: Answer
Q: 1) A single-phase 100-kVA, 2,400/240 V, 60-Hz distribution transformer is used as a step-down…
A:
Q: Using the parameters from the Typical Transformer Values Sheet for a 12.4kV/600V, 100 kVA…
A:
Q: 1. Consider a three-phase transformer with a rating of 700 MVA and a secondary voltage of 145 kv.…
A:
Q: If the turn ratio of a step-down transformer is 10:1 and the series impedance (referred to the…
A:
Q: A single-phase l0-kVA, 480/1120 -V transformer is to be used as an auto transformer tying a 600V…
A:
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: Transformer rated powers and relative short-circuit rates in a step-down transformer station are…
A: For the electrical design of the electrical substation, Short circuit MVA and Short circuit current…
Q: 100-kVA 6000/230-V single-phase transformer has the following resistances and mctances: R, = 4.320;…
A:
Q: Iron loss and copper loss in a 25 kVA, 200/200 volt single phase transformer are 400 watts and 500…
A:
Q: A single-phase transformer of rating 25 kVA, supplies a 12 kW load at power factor of 0.6 lagging.…
A: Referring to the given question, the load supplied is given as 12kW at 0.6 power factor lagging.…
Q: Question # 2: A 2000/400 V, 100 kVA, 60 Hz step-down single-phase transformer has a primary and…
A:
Q: For a 10 MVA, 132 kV/6.6 kV power transformer with delta-star connections, obtain the number of…
A: We have an power transformer with, MVA = 10 MVA HV Side Voltage = 132 KV LV Side Voltage = 6.6 KV…
Q: A three-phase Y-Y transformer is rated at 25 MVA, 13.8-kV:69-kV and has a single-phase equivalent…
A:
Q: Q7: A 25KVA, 2200/220V, 50HZ single-phase transformer's low voltage side is short-circuited and the…
A:
Q: 1. (a) The diagram for a single phase 60 MVA transformer is given below. Convert it to a Step-down…
A: Given 2-winding transformer details are V1/V2=50/100 kV.S=60 MVA The input and output currents of…
Q: A 2.5 kVA, 200V/40V single-phase transformer has the primary resistance and reactance of 3 and 12 Q,…
A: Transformer: Transformer is a static electrical device which transfers power from one circuit to…
Q: A 2.5 kVA, 200V/40V single-phase transformer has the primary resistance and reactance of 3 and 12 n,…
A: Given:- KVA=2.5 V1=200volt V2=40volt R1=3ohm X1=12ohm R2=0.3ohm X2=0.1ohm
Q: 3. A 10 kVA, single-phase transformer has a turns ratio of 15:1 and is supplied from a 2,0 kV…
A: Single phase transformer 10KVA , turn ratio 15:1 Primary side voltage 2KV Find the secondary…
Q: 3.9. A 400-MVA, 240-kV/24-KV, three-phase Y-A transformer has an equivalent series impedance of 1.2…
A:
Q: For the 11000/400V, AY 3-ph transformer, if the line current in the secondary is 500A calculate the…
A:
Q: A 2000/400 V, 100 kVA, 60 Hz step-down single-phase transformer has a primary and secondary…
A:
Q: Determine the efficiency of three-phase 400 kVA, 11kV/ 380 V transformer at over-loading condition…
A:
Q: 4.1 Assume that an ideal transformer used to step down 13.8–2.4kV and that it is fully loaded when…
A: Given:Transormer is ideal,Hence, the i/p KVA = o/p KVAVoltage rating 13.8 kV/ 2.4 kVAlso, o/p KVA =…
Q: A two-winding transformer rated at 100 kVA, is connected as an autotransformer to provide 10kV from…
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: A 40 kVA, 6,600/250V, 50 Hz transformer is having total reactance of 35 ohms when referred to…
A: Given Data: Rating = 40 kVA R1 = 10 ohm R2 = 0.2 ohm E1 = 6600 V E2 = 250 V
Q: Solve for the efficiency at three-eight load at 0.85 power factor of a 10-kVA single phase…
A: As per our guidelines, we are supposed to answer only one question. Kindly repost the question as a…
Q: A 10-kVA, 450/120V, 50-Hz transformer has the following circuit parameters: R, = 0.12 n, R, = 8.533…
A: As per Bartleby guidelines, since you have posted a question with multiple sub-parts, we will solve…
Q: transformer with a 10:1 ratio and rated at 60kVA, 2200/220V, 60Hz is used to step down the voltage…
A:
Q: a single-phase 250KVA, 11kV/2.2kV, 60HZ transformer has the following parameters. RHy = 1.3 Q RLy =…
A: Given data Single phase rating is S = 250 KVA Frequency is F = 60 Hz Calculating k k=2.2 KV1.1…
Q: Q2: A 4000/400 V, 10 kVA transformer has the following constants: Primary and secondary winding…
A:
Q: Consider a current transformer with a turns ratio of 400: 4, a secondary leakage impedance of (0.08…
A: In the given circuit diagram Turn ratio = 400 : 4 secondary leakage impedance is (0.08 + j0.8)…
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…
A: In this question 3 phase transformer delta -star is given....We have to find out primary voltage…
Q: 2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt 60 cycle…
A:
Q: A single-phase ideal transformer is rated at 2KVA, 240V/120V. The transformer is supplying rated…
A: A single phase transformer has, Apparent power (S) = 2 kVA Voltage ratio is 240/120 V. Load…
Q: 3. A single-phase 30KVA, 2000V/200V, 60HZ distribution transformer is used as a step-down…
A: Given data, A single-phase transformer rating(s)=30kVA E1E2=2000V200V Feeder series impedance=1+j20Ω…
Q: A, determine V½ l, Z, and the impedance Z',, which is the value of Z, referred to the primary side…
A: Given: N1=1000N2=250V1=1000∠0°I1=5∠30° The relation between voltage and the turns of the transformer…
Q: 4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters:…
A:
Q: 4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters:…
A:
Q: A 100,000-kVA 230/115-kV ∆-∆ three-phase power transformer has a per-unit resistance of 0.02 pu and…
A: Given Data Rating 100,000-kVA 230/115-kV Type : ∆-∆ three-phase per-unit resistance = 0.02 pu…
Q: Solve the following problems with complete solutions and units using two(2) decimal digits. Use your…
A: In this question we will find secondary voltage with rated primary voltage and hence the regulation…
Step by step
Solved in 2 steps with 5 images
- (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 ?An ideal transformer has no real or reactive power loss. (a) True (b) FalseA bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a balanced load of three 1, Y-connected resistors. Choosing a base of 90MVA,66kV for the high-voltage side of the three-phase transformer. spify the base for the low-voltage side. Compute the per-unit resistance of the load on the base for the low-voltage side. Also, determine the load resistance in ohms referred to the high-voltage side and the per-unit value on the chosen base.
- The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA Secondary (2): Y connected, 13.2kV,10MVA Tertiary (3): A connected, 2.3kV,5MVA Neglecting winding resistances and exciting current, the per-unit leakage reactances are X12=0.08 on a 15-MVA,66-kV base X13=0.10 on a 15-MVA,66-kV base X23=0.09 on a 10-MVA,13.2-kV base (a) Determine the per-unit reactances X1,X2,X3 of the equivalent circuit on a 15-MVA,66-kV base at the primary terminals. (b) Purely resistive loads of 7.5 MW at 13.2 kV and 5 MW at 2.3kV are connected to the secondary and tertiary sides of the transformer, respectively. Draw the per- unit impedance diagram, showing the per-unit impedances on a 15-MVA,66-kV base at the primary terminals.A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R1=0.75 Resistance of the 240-V winding: R2=0.0075 Leakage reactance of the 2400-V winding: X1=1.0 Leakage reactance of the 240-V winding: X2=0.01 Exciting admittance on the 240-V side =0.003j0.02S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source whose voltage is e1(t)=100(1| t |)volts for 1t1ande1(t)=0 for | t |1 second. A2- farad capacitor is connected across winding 2. Sketch e1(t),e2(t),i1(t),andi2(t) versus time t.
- In per-unit equivalent circuits of practical three-phase transformers, under balanced thr-phase operation, in which of the following connect ions would a phase-shifting transformer come up? (a) Y-Y (b) Y- (c) -The direct electrical connection of the windings allows transient over voltages to pass through the auto transfonner more easily, and that is an important disadvantage of the autotransformer. (a) True (b) FalseFor an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is referred to winding 1 (primary) by multiplying Z2 by (a) The turns ratio (N1/N2) (b) The square of the turns ratio (N1/N2)2 (c) The cubed turns ratio (N1/N2)3
- For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) NoThree single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance Xeq=0.10perunit, are connected to form a three-phase bank. The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit equivalent circuit if the low-voltage windings are connected (a) in with American standard phase shift or (b) in Y with an open neutral. Use the transformer ratings as base quantities. Winding resistances and exciting current are neglected.The ratings of a three-phase, three-winding transformer are Primary: Y connected, 66kV,15MVA Secondary: Y connected, 13.2kV,10MVA Tertiary: connected, 2.3kV,5MVA Neglecting resistances and exciting current, the leakage reactances are: XPS=0.09 per unit on a 15-MVA,66-kV base XPT=0.08 per unit on a 15-MVA,66-kV base XST=0.05 per unit on a 10-MVA,13.2-kV base Determine the per-unit reactances of the per-phase equivalent circuit using a base of 15 MVA and 66 kV for the primary.