Answered: What is the characteristic of…

Engineering

Electrical Engineering

What is the characteristic of transformer of step-up and step-down transformer?

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 3.20MCQ

See similar textbooks

Related questions

Q: 5. For the zener circuit below, determine: a.) V. b.) L c.) Iz

Q: by L'Hopital's rule 1-cos(x) lim X→0 x2

Q: In an AM signal, the peak amplitude is three times the unmodulated carrier level. The percent modula...

A: Brief description : Amplitude Modulation system is one of the modulation system where amplitude of t...

Q: A three-phase system has a balanced delta-connected load with a 2002 resistor in series with a 22µF ...

Q: Make a list of three analog-to-digital technologies. What was the rationale behind each transformati...

A: The digital circuits can be sequential or combinational circuits. The combinational circuits depend ...

Q: Vi = 1.5 V 0.15 V 1.5 V 0.45 V Vo = 6.75 V A1 = 0.1 A2 = 10 A3 = 0.3 A4 = 15 What is the total gain ...

Q: Consider the circuit diagram below, where: v:(t) = 12 cos(377t) v2(t) = 5 cos (377t) Use node analys...

Q: 10 V R 20 V 6 A

Q: A voltage of 200 V is applied to a series circuit consisting on a resistor, an inductor and a capaci...

A: The voltage across resistor =170V The voltage across INDUCTOR=150V The voltage across CAPCITOR=100V

Q: If the freauney of information signals is 5K HZ find *The number of pulse in one seconda nd Find the...

A: The frequency is number of cycles or pulses in one second and thus it is 5000 pulses in one second. ...

Q: electricity is generated from a wind turbine.

A: Energy resources are of two types in nature – Non-renewable - These type of resources are limited i...

Q: using Source trans for maetion Find the current in the 84 resistor

Q: If power = .90

A: Statistical Power- The probability that test we are performing will reject hypothesis which is null ...

Q: For the circuit shown, if R1 > R2, then which of the following is true? R2 AV You cannot tell from t...

Q: What is the value of Id if Vgs = 2.5V, Vp = 5V and Idss = 10mA? O a. 2.5mA O b. 2.33mA O c. 5mA O d....

Q: 2. I=_mA E-24V P= 12 W

A: In this question we will find current with given power and resistance value....

Q: A: Find the Fourier of the following function and sketch: f(2) = {* " fx + T if - I<x<0 if %3D 0<xくT

Q: If A = 4a, + 3ap – 5a, the component of A parallel to the surface o = 27 is; Select one: O -4ap О 4а...

Q: (c) Determine the value of output voltage (Vo) for the circuit given below: 20 kΩ 10 k2 Vo1 Vo 2 + 1...

A: The solution is given below

Q: (c) Determine the peak output voltage and the average value of the output voltage for the given half...

Q: An ideal transformer is connected to a voltage source given by es(t) = 100cos(2000nt)V on the primar...

A: In this question, Ideal transformer is connected to the es = 100cos(2000πt) V. Transformer turn ra...

Q: Determine the magnitude and phase angle of the circuit current shown in Figure l- 14.50a

Q: How do you manufacture the PCB?

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

Q: 2MF

Q: Compute for the potential at A(5, 0, -1) if the potential at the origin is -5 MV in a region in vacu...

A: Using Electric field intensity due to point charge derive the expression for potential and then find...

Q: Compute the impedance Z of a series R-L-C circuit at angular frequencies ω = (a) 1001 rad/s Assume...

A: We need to find out current and impedance for given series RLC circuit

Q: Examine the role played by modern wireless communication systems in the deployment of the Smart Grid...

A: A message signal is transferred from the sender to the receiver end. The signal is transmitted throu...

Q: PSPICE Fig. P9.36 is 25/0° mA. MULTISIM a) Find I, I, and I. b) If w = 1500 rad/s, write expressions...

Q: PROBLEM NUMBER THREE Find the transfer function relating the 82(s) to T(s) for the rotational mechan...

Q: A fixed bias n-channel JFET with Vdd= 12V, Rd= 1.2k ohms. Idss=12mA and Vp=-4V. Determine Id. a. Non...

Q: Using nodal analysis, find v, and vz in the circuit of Figure below 0.2F 25 cos (21) A( 2H 3v,

Q: The envelope of a sinusoidally amplitude modulated carrier wave varies from a maximum value of 4V to...

Q: 9:- Redraw the circuit below then determine valtage Va Va ?: using KVL. 16U

Q: What exactly is the issue with NRZ? And, more importantly, how can it be fixed?

A: Microprocessor and microcontrollers are used for data processing. Logic and control are used for pro...

Q: Low input power rotation of the knob that produces a high-power output in tracking television signal...

Q: The antenna current of an AM transmitter is 8 A when only carrier is sent, but it increases to 8.93 ...

Q: Q1: Find F.T for the signal shown below: ATA -4 -2 2 4 Ans. (8 cos3w – 4 cos4w – 4 cos2w)/w² - -

A: Ans- Differentiate ddtft w.r.t to t, Now ,d2f(t)dt2=2δ(t+4) -4δt+3+2δt+2+2δt-2-4δt-3+2δt-4........

Q: A resistor value of 12kN ± 0.5% has what colors?(should be in correct order)

Q: Problem [8] Determine the value of v, in order to make v, =-16.5V 10 k2 50 k2 2 Vo- ww 20 k2 V2 O O ...

Q: %3D %3D Rg- 85 km %3D %3D Cbe = 50 PF %3D %3D Re, = 2 ka Cwi= 4pF f) Bund with e) fL, fH (ist stage ...

Q: non-uniform electric field E =x²y a _+ +xyz a_+xz²a_V/m-

A: Electric field lines are zero inside the perfect conductor. And permittivity of medium is8.854x10^-1...

Q: In a voltage divider bias, the base resistors are 15 kOhms and 5 kOhms (R1 and R2). If the value of ...

A: The solution is given below

Q: What are the collector currents in Ql and Q2 in the reference in the given figure if Vcc= VEE=2.5 V,...

A: The circuit diagram is given as Apply KVL in the emitter loop. -VBE1+VBE2+RI2=0

Q: A string of four diodes is used to provide constant voltage of 3.0 V. (a) Calculate the percentage c...

A: The given circuit can be analyzed by replacing the diode with its equivalent voltage drop and then s...

Q: A carrier is simultaneously modulated by two different audio sine waves. If the modulation index due...

Q: R2 R,

Q: In a fix bias NPN transistor amplifier, Vcc = 12 V, collector resistor is 5 kOhms and collector curr...

Q: A total charge of 300 nanocoulombs is distributed evenly throughout the area of a disk with radius 1...

A: Any charged particle produces an electric field. This electric field is directed from the positive c...

Q: Draw and explain the timing diagram of LXI D, 2465 H. Calculate the time required to execute this in...

A: Instruction : LXI D, 2465H The address 2465H will be loaded in the DE Register Pair, as shown below:...

Q: Problem [2] Find the equivalent inductance of the circuit. Assume all inductors are 10 mH. ll ll ll

A: In this question we need to find a equivalent inductance of the given circuit

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

1. What is the characteristic of transformer of step-up and step-down transformer? 2. What are the significances of transformer polarity tests? 3. When do we use additive and subtractive transformer polarity test? 4. How are the frequency affects the transformer polarity test?

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

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

Why is it important to reduce the moisture within a transformer to acceptable levels during transformer installation?
For developing per-unit equivalent circuits of single-phase three-winding transformer, a common Sbase is selected for all three windings and voltage bases are selected in proportion to the rated voltage of the windings (a) True (b) False
A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an autotransformer to step up the voltage from 2300 to 2530 volts (a) Draw a schematic diagram of this arrangement, showing all voltages and currents when delivering full load at rated voltage. (b) Find 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 this kVA rating is transformed by magnetic induction? (C) The following data are obtained from tests carried out on the transformer when it is connected as a two-winding transformer: Open-circuit test with the low-voltage terminals excited: Applied voltage =230V, input current =0.45A, input power =70W. Short-circuit test with the high-voltage terminals excited: Applied voltage =120, input current =4.5A, input power =240W. Based on the data, compute the efficiency of the autotransformer corresponding to full load, rated voltage, and 0.8 power factor lagging. Comment on why the efficiency is higher as an autotransformer than as a two-winding transformer.
In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) False
A three-phase transformer is rated 1000MVA,220Y/22kV. The Y-equivalent short-circuit impedance, considered equal to the leakage reactance, measured on the low-voltage side is 0.1. Compute the per-unit reactance of the transformer. In a system in which the base on the high-voltage side of the transformer is 100MVA,230kV what value of the per-unit reactance should be used to represent this transformer?
The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) False
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.
Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at (a) unity power factor, (b) 0.8 power factor leading. Compare the results with those of Problem 3.14. -
What should be the focus of transformer preventive maintenance efforts?
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.
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
Reconsider Problem 3.64 with the change that now Tb includes both a transformer of the same turns ratio as Ta and a regulating transformer with a 4 phase shift. On the base of Ta, the impedance of the two comp onents of Tb is jO.1 per unit. Determine the complex power in per unit transmitted to the load through each transformer. Comment on how the transformers share the real and reactive pors.