Calculate the efficiency of a 20 kVA transformer when operated at full load with apower factor of 1. The full load copper loss is 600 watts and the iron loss is 400watts.O a) 97.5 %O b) 95.2 %O c) 90 %O d) 87.7 %

We need to find out efficiency of transformer .

Answered: Calculate the efficiency of a 20 kVA…

Calculate the efficiency of a 20 kVA transformer when power factor of 1. The full load copper loss is 600 watts and the iron loss is 400 watts. O a) 97.5 % O b) 95.2 % O c) 90 % O d) 87.7 %

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....

See similar textbooks

Related questions

Q: Numerate the step-by-step procedure to obtain maximum equivalent resistance for the three resistors…

A: In this question we will find maximum resistance for given individual resistance....

Q: The switch in the circuit in Figure 3 has been open a long time before closing at t= 0. Find i(t)…

A: For the given circuit, the switch is open for long time and closed at t=0. In steady states…

Q: Consider the following JFET circuit. If Ip = 4.3 mA, the voltage at the drain is: +12V b (mA) - 8.0…

Q: Vee +12V R3 Rs 3.3 KA 39kA Bc 337 R4 R2 VB 4.7kn VB VE Vc Ica VCEA VBEQ re 1,20/0.58 :32 Q

A: BJT is a current controlled Device in which base current control the mode of operation of BJT. Mode…

Q: Determine vo in the circuit (use superposition principle)

A: In this question we need to find a voltage Vo by using superposition principal.

Q: 3. Determine only the Voltage (VL) across the load resistance and the current (IL) flowing through…

Q: If the current in the secondary of a transformer is decreased from full-load to half- load the core…

A: * The core losses ( or iron losses) does not depends on current. * The core losses depends only on…

Q: Ead the raaster tunchan KNG) for the Cirauil shown belowe 1H IH V.CA)

A: Solve the problem

Q: 16. Consider the circuit of Fig. 13.46. The two sources are is1 = 2 cos t mA and i2 = 1.5 sin t mA.…

Q: Which of the following statements is one of the properties of capacitors connected in series?…

A: Consider the capacitors connected in series, In this circuit same charge will flow through all…

Q: Hew/ Frad the hansler funchon Ials)/vIS) lor the Circuit shoun belows Velt)

A: In this question we will find transfer function.....

Q: Why is it a shorted circuit and not treated as a wye and dye?

A: We have labeled the nodes as shown in the figure below.

Q: Two microwave frequencies are authorized for use in microwave ovens: 900Mhz and 2560MHz. Convert MHz…

Q: Problem 2: Use Gauss' theorem to determine f, D.dS, where the electric flux density is D = 3x2a, -…

Q: Vec 16 V R, 33 k2 Re 2.0 k2 Boc 200 %3! R, RE 500 Ω 7.5 kn 4 VCE is approximately O 5.6 V O7.5 V 3.9…

A: We need to find collector to emitter voltage for given circuit.

Q: For the given circuit, the real power dissipated by this circuit is:

A: The real power can be calculated by using the total impedance of the circuit.

Q: Q2. 3. Determine the dot product of two vectors if the magnitude of the first vector is equal to 8v6…

Q: Find the laplacian of A = In(x²y²z²) + 2 2 at point (1, 2, 3). (Hint: Perform the laplacian first,…

Q: Calculate the value of i in the circuit ANSWER:Blank 1

Q: "The instruction MOV DS:[2000H], AL" has mixed sizes operands O copies byte-size data in AX to the…

A: Correct option is 4 : "is illegal,not allowed". Because " should not be present in instruction and…

Q: Listen Increasing the L/C ratio of a series resonant R-L-C circuit while maintaining constant…

A: In this question, We need to choose the correct options What is affact if increase the Ratio of…

Q: Explain how the resistances of common metallic conductors vary with temperature.

A: What is resistances in a material? Obstacle to the flow of electron in a material is called the…

Q: Explain with vector diagrams and a graph the effect of excitation on armature current and power…

A: We will refer the concept of effect of excitation on armature current and power factor.

Q: TOK 20K 3K 9+Vcc 3K 9+ Vcc 5V +어 8K 3V 6- Vcc Vo 2V 8K - Vc

Q: If the real power in a circuit is 50 watts and the apparent power is 75 volt amperes, the circuit…

A: We need to find phase angle .

Q: 3.1 (a) Define inverter along with its various industrial applications. (b) Explain the operation of…

A: NOTE- As per the rules we can answer only 3 sub-parts, please post the remaining sub-parts as the…

Q: How to interpret / read capacitor values or capacitance?

A: Concept :- A.Write down the first two digits of the capacitance. B.Use the third digit as a zero…

Q: RO 02 b3 b2 er.E maldor +1 + Σ 1 Σ 1 Σ OY S S S az a2 a1 (b)

Q: boolean expression using de morgan's theorem D1 D2 OUTPUT 0 0 1 0 1 1 1 0 1 1 1 0

Q: Q1. Redraw the circuit with complex number values. Identify and CLEARLY write all the node/mesh…

Q: B=100, thus a is equal to, Select the correct response: O 1.010 0.090 O 0.990 O 0.909 Common-Emitter…

Q: Listen For the circuit shown, increasing the frequency of the supply voltage in the circuit causes…

A: The solution is given below

Q: -2i,

Q: In the figure, determine the forced response for the capacitor voltage v when vs = 0.2t V and when…

A: It is given that: ∙Vs=0.2t V∙Vs=e-30t V

Q: 1. Using the observed light curve for a Cepheid variable shown below, estimate the distance to this…

A: Assume the Cepheid star is Type 1 that is classical Cepheid. From the above light curve, The time…

Q: Solve iy due to the current source

A: Here we will apply superposition theorem and find Iy due to current source while making the 10 volt…

Q: Design a Bipolar Junction Transistor amplifier that has an input of 400mVpp at 3kHz and has an…

A: The amplifier circuit can be designed as Small-signal modeling of the amplifier

Q: Single line diagram of a three-phase power system is shown in the Figure Q1. Draw out the per phase…

Q: The intersection of the loadline and the current IB is called Select the correct response:…

A: In this question we are answer questions related to BJT....

Q: find the TF for:

A: Open Loop System-A system having a input in the system which does not depends on the system output.…

Q: 13. The main and auxiliary windings of a hypothetical 110-V, 60-Hz, split-phase motor have the…

A: In this question, We need to determine the external resistance in Ohms required in series with the…

Q: C=Q,0001

A: In this question we need to find a current shown in the given circuit.

Q: Solve for Ib and lc.

Q: Figure shows primary line voltages (a) Identify the transformer connection. (b) Calculate…

A: In this question, We need to (a)Identify the transformer connection. (b)Calculate currents I2 and…

Q: 11. A large exhaust fan for a farm building on a remote farm requires a 92-hp, 1175-rpm motor. The…

A: The required horse power rating is 92 hp.

Q: determine the potential at point A

Q: Two relays R1 and R2 are connected in two sections of a feeder as shown in Figure Q2. Relay R1: CT…

A: Given information: Relay R1: CT ratio=300/5, plug setting=2.5 A, TMS=0.3. Relay R2 : CT ratio=500/5,…

Q: Problem 5: The electric potential in Cartesian coordinates is given by V(x, y, z) = e- e-y+z?.…

A: Given: The potential in Cartesian coordinates is given by: Vx,y,z=ex-e-y+z2 To find: (a) The…

Q: During the 'Introduction to Nanotechnology class', a student argues that CNFETS are better than the…

A: The dedicated branch of science which deals at nanometer scale for designing and producing…

Q: A 600 volt, 3-phase, 60 Hz power supply delivers power to a delta connected, 15 kW electric heating…

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

Calculate the efficiency of a 20 kVA transformer when operated at full load with a
power factor of 1. The full load copper loss is 600 watts and the iron loss is 400
watts.
O a) 97.5 %
O b) 95.2 %
O c) 90 %
O d) 87.7 %

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

All values of a transformer are proportional to its __________________ ___________________.
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 nameplate on a transformer will indicate whether or not it is a Class 2 transformer. (True) (False) (Circle the correct answer.)
For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50
An infinite bus, which is a constant voltage source, is connected to the primary of the three-winding transformer of Problem 3.53. A 7.5-MVA,13.2-kV synchronous motor with a sub transient reactance of 0.2 per unit is connected to the transformer secondary. A5-MW,2.3-kV three-phase resistive load is connected to the tertiary Choosing a base of 66 kV and 15 MVA in the primary, draw the impedance diagram of the system showing per-unit impedances. Neglect transformer exciting current, phase shifts, and all resistances except the resistive load.
The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core transformer.
16. The all day efficiency of a 10 kVA single-phase transformer is 94.7 % when loaded as follows: full load unity pf for 4 hours and no load the rest of the day. If the full load copper loss at unity pf is 400 watts, calculate the core loss in kW (round off answer to two decimal places)
2. An 800 kVA transformer has a primary winding resistance of 0.5Ω and a secondary winding resistance of 0.001 Ω. The iron loss is 3 kW and the primary and secondary voltages are 3000V and 300V respectively. If the power factor of the load is 0.75, determine the efficiency of the transformer for three forth load
A 600 kVA transformer has a primary winding resistance of 0.5Ω and a secondary winding resistance of 0.001 Ω. The iron loss is 3 kW and the primary and secondary voltages are 3000V and 300V respectively. If the power factor of the load is 0.75, determine the efficiency of the transformer for one forth load
A 225 / 425 V, 8 KVA, 50Hz single phase transformer has a copper loss of 105 W at full load, unity power factor with an efficiency of 95 %. Determine the output power and iron loss.
In a 130 KVA, 2000/200 V power transformer, the iron and full load copper losses are 80 W and 380 W respectively. Calculate the efficiency at 50 % load and 0.75 power factor. Fraction of Load (X) Efficiency
In a 160 KVA. 2000/200 V power transformer, the iron and full load copper losses are 80 W and 350 W respectively. Calculate the efficiency at 25 % load and 0.75 power factor.