2. A 40KVA, 1200/80V, 60HZ, single-phase transformer is tested at full-load and thefollowing results are recorded:i.Full-load copper losses = 720Wii.Rated-voltage core losses = 600WCalculate the transformer efficiency at:a. Full-load, Unity pfb. Quarter-load, 0.7 pf LAG

The core loss is independent of load connected to the transformer. At any load the core loss is…

A 40KVA, 1200/80V, 60HZ, single-phase transformer is tested at full-load and the following results are recorded: i. Full-load copper losses = 720W Rated-voltage core losses 600W ii. Calculate the transformer efficiency at: a. Full-load, Unity pf b. Quarter-load, 0.7 pf LAG 2.

A 40KVA, 1200/80V, 60HZ, single-phase transformer is tested at full-load and the following results are recorded: i. Full-load copper losses = 720W Rated-voltage core losses 600W ii. Calculate the transformer efficiency at: a. Full-load, Unity pf b. Quarter-load, 0.7 pf LAG 2.

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 3.4P: A single-phase 100-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...

See similar textbooks

Related questions

Q: In the following circuit, the equivalent current source 12 for V2 and the resistor in parallel ar R…

A: Given circuit,

Q: Q3/ Determine if each of the following signals is a power signal, an energy signal, or neither. (a)…

Q: Find the input resistance, voltage gain, current gain, and power gain for the amplifier. ßpc= 250.

A: The required parameters can be calculated by using DC analysis and AC analysis of the amplifier…

Q: r(t) + s + 2 y(t) k s(s – 1)(s + 4) - - Determine the range of k for stability.

Q: A 3 phase induction motor is wound for 6 poles and is supplied fromn 50-Hz system. Calculate 1) the…

A: Consider the formula for the speed of the rotor as, Ns=120FP

Q: An impedance coil having resistance 28.8 Ohm and inductance 0.024H is connected in series with a…

Q: Explain the successive approximation type ADC with neat schematic diagram.

A: Successive approximation ADC: The successive approximation Analog to Digital Converter is a type of…

Q: I2 a I3 220° A -j12 12 I4 + Vx b I5 12 12 12 2Vx. 4230° A e

Q: P D1 Q1 D2 Q2 Q CLK G1 Q1'O G2 Q2'O

A: The solution is given below

Q: Q5 The charge of the condenser q() = [ 163) I(x)dx %3D is the rate of change of the current I.…

Q: flab,code):1I(0, 3,6,9,1!,19,20,24,25, 26,27,28, 29, 30) ΠD (,.a,12,13)

Q: Evaluate both sides of divergence theorem for for the volume enclosed between r=1 and r=2 in…

Q: A В C D F D E C

A: Given boolean circuit,

Q: 2. Draw, in the spaces provided, rough sketches shov ing the following: a) A current which lags the…

Q: Q1/b: the inverter always produce: Q1/c: SVPWM have Q1/d : the binary number of the sectors…

A: As per the guidelines given to us, we can only provide the solution to the three subparts of the…

Q: R. Rs R, V20 M oVo V30M R V1=1V, V2-2V, V3=10V RI-IKΩ, R2-4ΚΩ, R3=1ΚΩ, R4-4KΩ R5-20K Determine Voj…

A: We need to find out output voltage for given opm circuit

Q: Solve for the electric network 120 12V 200 10V ww- 150 find the values of each current across each…

A: We need to find out current through each resistor .

Q: C(s) R(s) G2 G3 G, G4 Gs G6 H1

A: We need to find transfer function for given diagram

Q: For the amplifier shown, determine V, in mv. 1 ka BJT VV 12 mV -4 mV R2 0.51k transistor amplifier…

A: We need to find out output voltage for given amplifier

Q: (iv) Draw the circuit diagram to explain the adjustable-frequency drive for a 3-phase induction…

A: Electrical machines can be either generator, transformer or motors. They can be either Ac machines…

Q: (8)Using the method that applies the Laplace Transform to the circuit below. Find v(t) for t20. Find…

Q: Q1) Draw the ladder diagram for the logic circuits A&B В: S* (M+W) = (S*W)HS*M) W (M+W) M A

Q: A shunt generator delivers 195 A at terminal p.m. of 250 V. The armature resistance and shunt field…

A: Since you have posted a question with multiple sub parts , we will solve first three sub parts for…

Q: Use node analysis to determine node voltages and branch currents in the image below.

A: In this question we need to find a node voltages and branch currents in the image below.

Q: Two impedances in parallel are connected across an AC source. They are so adjusted that the current…

A: The solution is given below

Q: Solve the electric network. You may use any of the 3 solutions to SLE (Gauss Elim-REF, GJ-RREF, or…

Q: +12 V 36 k2 36 ka V = 2 mV = 200 33 k2 -12 V

Q: Sketch the final waveform of below circuit. V1 D2 9V R1 25V

A: In the given circuit, a battery is connected negative or reverse bias to the diode and a resistance…

Q: A hypothetical isotropic antenna is radiating in free-space. At a distance of 100 m from the…

A: We will find out power density and power radiated

Q: A discrete-time periodic signal x[n] is real valued and has a fundamental period N = 5. The nonzero…

Q: 19) USE SOUACE TRANSFORMAIION To FIND Io 3kn 3kn 34kn 33kn 33kn Io Hkn )2mA + 12v To

A: Source transformation A current source connected in parallel to a resistance can be converted into…

Q: Calculate I, and I, in the two-port of Fig. 18.11. I, 2Ω V9 = Ilz Z12 =-j4 2 V2 2/30° V V 21 =-j4 2…

A: In this question, We need to calculate the current I1 and I2? We know Z parameters V1 = Z11 I1…

Q: Solve the current using superposition theorem and solve for the individual currents of each…

Q: LM 117 VIN-28V - VIN Vour VOUT R2 is half as much as R1 and Vref is 2v. ADJ R1 240 Vref ladi 11 C1…

A: We need to find out current for given circuit

Q: For the voltage-divider circuit shown, check the appropriate analysis to be used and please solve…

Q: (7)Using the method that applies the Laplace Transform to the circuit below. The switches in the…

A: Given the circuit, as shown below: We need to calculate V0(s) , vo(t) and i(t).

Q: 2. Ap Determine the output x from the NOR gate for the given input waveforms. A B

A: As per our guidelines we are supposed to be answer the first question only. Kindly repost the other…

Q: Three phase motor is rated 750 HP at 460-V line to line, with PF of 0.85 lagging and efficiency of…

A: The solution is given below

Q: Diodo kr = 0.001 RL = 1K Load Resistor AL Capacitor PIV = 10V ** If rating is given, do not include…

A: Given: Consider the following circuit: To find: (9) What is IDpk rating? (10) What is IDave rating?

Q: 3+2s² +5s+175 $3+4s²+25s+100 F(s) :

Q: A cable's damage and its position may be calculated using what tool?

A: In underground cabling,it is very difficult to find the location of cable damage. To find the…

Q: Implement the following function with a multiplexer. Mark all the pins, inputs, and outputs clearly.…

A: Brief description : In the above given question they have mentioned four variable minterms. Minterms…

Q: 5. With the aid of the circuit diagram shown below, discuss how it produces a Frequency Modulated…

A: According to the question, we need to discuss how the given circuit produces a Frequency Modulated…

Q: Determine the total resistance and the current flow for the circuit shown in the accompanying…

A: Total resistance will be the sum of all resistance R1, R2 and R3 as they are in series connection.…

Q: How does the series connection differ from the parallel connection?

A: The solution is given below

Q: Q2/ Determine the period of each of the following functions: (a) (?) = (3+ 2)e3 (b) ) = (1+…

A: In this question we need to find a fundamental time period of the given signal.

Q: Vm = 20 V, V = 6 V, Determine the minimum output voltage. O -6 V 20 V O -20 V O -14 V

A: Here the properties of diode have been used to answer this question. Here as the cut in voltage of…

Q: C(s) R(s) G2 G3 G1 G4 G3 H1

Q: Q1: Define filters and explain the types of filters, compare between active and passive filter?

A: Filter: It is a circuit that is used to select a particular frequency. It can blocks or pass the…

Q: Solve the electric network. You may use any of the 3 solutions to SLE (Gauss Elim-REF, GJ-RREF, or…

A: The solution is given below

Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

100%

2. A 40KVA, 1200/80V, 60HZ, single-phase transformer is tested at full-load and the
following results are recorded:
i.
Full-load copper losses = 720W
ii.
Rated-voltage core losses = 600W
Calculate the transformer efficiency at:
a. Full-load, Unity pf
b. Quarter-load, 0.7 pf LAG

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+j2.0) ohm. The equivalent series impedance of the transformer is (1.0+j2.5) ohms referred to the high-voltage (primary) side. The transformer is delivering rated load at a 0.8 power factor lagging and at a rated secondary voltage. Neglecting the transformer exciting current, determine (a) the voltage at the transformer primary terminals, (b) the voltage at the sending end of the feeder, and (c) the real and reactive power delivered to the sending end of the feeder.
For an ideal 2-winding transformer, the ampere-turns of the primary winding, N1I1 is equal to the ampere-turns of the secondary winding, N2I2 (a) True (b) False
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.
An ideal transformer has no real or reactive power loss. (a) True (b) False
Consider Figure 3.4. For an ideal phase-shifting transformer, the imda nce is unchanged when it is referred from one side to the other. (a) True (b) False
The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) False
A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when operated at rated load, 0.8 power factor lagging. This transformer is to be utilized as a 1440/1200-V step-down autotransformer in a power distribution system. (a) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the ratings as a two-winding transformer. Assume an ideal transformer. (b) Determine the efficiency of the autotransformer with the kVA loading of part (a) and 0.8 power factor leading.
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.
Three 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.
A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a 150-MVA,0.8 lagging power factor load through a step-down 230/23-kV transformer. The impedance of the line and transformers at 230kVis18+j60. Determine the tap setting for each transformer to maintain the voltage at the load at 23 kV.
A single-phase two-winding transformer rated 90MVA,80/120kV is to be connected as an autotransformer rated 80/200kV. Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of the kA rating is transferred by magnetic induction?
For the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power input of 65 kW and a current of 30 A. Compute the values for GcandBm in siemens referred to the high-voltage winding. Compute the efficiency of the transformer for a load of 10 MW at 0.8 p.f. lagging at rated voltage.