B/ Short answer questions 1- What is the function of instrument transformers? 2- What are the differences between core and shell type transformers? 3- The iron losses is constant in all-loads. Why?
Q: Where do an Iron loss occur? 17. What type of material is used for transformer core to reduce…
A: In this question we will write about iron loss and hysteresis loss and losses varies with load...…
Q: 2. How is transformer insulation divided? Briefly indicate the insulation arrangement indicating the…
A: Transformer insulation need to withstand very high impulse voltage.
Q: A certain single-phase transformer with full load copper loss and core-loss is loaded at full load.…
A:
Q: 1. What is the difference between power transformer and distribution transformer in core losses and…
A: Power transformers are generally high voltage transformers which are used stepping up and down of…
Q: Discuss the circumstances where parallel operation of transformers may be a) considered beneficial.
A: Electrical machines can be either generator ,transformers or motors. They can be either AC machines…
Q: From the topic of insulation resistance testing of a transformer, what specific precaution needs to…
A: This question is from "Power System And Protection". Under which we are going to study about…
Q: a) With the aid of a well-labeled diagram, describe a step by step approach of conducting a…
A: A continuity test provides the information about a break in either of the coil wires. To perform…
Q: What are the conditions for the parallel operation of 1-phase transformers
A: In this question, We need to the conditions for the parallel operation of 1-phase transformers?…
Q: The shell type transformer has less leakage flux compared to the core type transformer True False
A: Choose the correct option Is it true or false? "The shell type transformer has less leakage flux…
Q: Why are the low voltage winding short-circuited and high voltage excited during the short-circuit…
A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…
Q: The shell type transformer has less leakage flux compared to the core type transformer True False
A: In the question, choose the correct option? "The shell type transformer has less leakage flux…
Q: (c) Explain the losses of a real single-phase transformers.
A: In this question we will write about single phase transformer losses....
Q: In experiment :(separation of iron losses in single-phase transformer ),K1 belonging with hysteresis…
A: Given: Separation of iron losses in single phase transformer K1 belonging with the hysteresis K2 for…
Q: The efficiency of two identical transformers under load conditions can be determine by what test?
A:
Q: Detailed description of open circuit test on single phase transformer
A: In this question we discuss about open circuit test of transformer .
Q: A 50 MVA 230/115-kV, Δ-Y three-phase connected power transformer has a per unit resistance of 0.015…
A: Transformer is a static electrical device which transfers power from one circuit to another circuit…
Q: Answer the following questions 1. What physical and construction characteristics impact the value of…
A: Since you have asked multiple questions, we will solve the first question for you. If youwant any…
Q: A certain single-phase transformer with full-load copper loss and core loss is loaded at full load.…
A:
Q: List and describe three (3) losses that occur in power transformers.
A: Losses in power transformers: Iron Losses Copper Loss or Ohmic Loss Stray Loss
Q: 1-which side is short cct.in short cct. test ? why? 2- Draw the exact equivalent circuit of the…
A: Answer(1) A short circuit test is conducted to find out variable losses in the transformer. So, to…
Q: )A. Draw approximate transformer model into all quantities of a secondary referred to primary.…
A: Transformer model Equivalent transformer circuit diagram:- Secondary referred to primary side
Q: A 50 MVA 230/115-kV, A-Y three-phase connected power transformer has a per unit resistance of 0.015…
A: Need to find the excitation branch element Rc on the low voltage side solve as below
Q: Explain vector grouping of transformers with suitable diagrams. Mention its usefulness.
A: The three-phase transformer can be imagined as a three single-phase transformer having a common…
Q: Mention the types of iron cores in the transformers and the effect of the shape of the iron core in…
A: Iron Cores are also part of transformers
Q: Question 1 The shell type transformer has more leakage flux compared to core type transformer True…
A: The leakage flux in core type transformer more than that of shell type transformer .Because the core…
Q: A 50 MVA 230/115-kV, A-Y three-phase connected power transformer has a per unit resistance of 0.015…
A: Given rating of transformer : 50 MVA HV side 230 V assuming primary side LV side 115 V assuming…
Q: What are the reasons for using transformer oil in power transformers and why are mineral oils…
A: The explanation is as follows.
Q: The per-unit system calculations method eliminates the need for explicit voltage-level conversions…
A: in the per-unit system each voltage is represented in terms of its base value
Q: A lø transformer has an equivalent leakage reactance of 0.04 per unit. The full-load copper loss is…
A:
Q: What are the objectives of implementing an open circuit test on single phase transformer
A: In this question we will write objective of open circuit test on single phase transformers...
Q: Power transformer divided into two categories which are dry type and oil-immersed transformer, with…
A: You have asked multiple independent questions. We are authorized to answer one question at a time.…
Q: Which transformer is used for welding application? Explain the operation in detail with diagram.
A: Need to find which transformer is used for welding application
Q: TRUE or FALSE: If a transformer is loaded from full-load value to half-load value, then the amount…
A:
Q: The shell type transformer has less leakage flux compared to core type transformer O True False
A: In this question ,we have to write that shell type transformer has less leakage flux or not compared…
Q: What conclusions we come up with after doing open circuit test on single phase transformer
A: For open circuit test of transformer excite any one winding of transformer at rated voltage and…
Q: The eddy current and hystresis losses in a 400V, 50HZ, single phase transformer is 500W and 900W…
A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…
Q: Sketch a basic transformer structure. Identify and labelled the core, primary winding and secondary…
A: The correct solution is given below
Q: Answer all questions Q1/ Answer the following: 1- Can a Single-Phase Transformer be used on a…
A: Single-phase transformer : A single-section transformer is an electrical tool that accepts…
Q: When the similar terminals of high voltage and low voltage windings of a transformers are diagonally…
A: A transformer is used to either up or down the voltage level. It can also be used to provide…
Q: Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer.…
A: Given: The no-load voltages in the primary and secondary circuits are 200 volts and 400 volts,…
Q: Why are single-phase distribution transformers made whit the low-voltage winding in two sections? A-…
A: Single-phase distribution transformers made with the low-voltage winding in two sections to minimize…
Q: In Back To Back Test on Two Similar Single Phase transformers. What will be the current in the…
A:
Q: What is the Influence of the manner the core coil assembly of the transformer on calculations of…
A:
Q: 2- What are the differences between core and shell type transformers? 3- The iron losses is constant…
A: In this question we will write about core type and shell type transformers differences....
Q: 1- What are the advantages of Transformer Tests? 2- Why is the high voltage winding of single phase…
A: advantages of transformer tests why is high voltage winding of single phase transformer is kept open…
Q: 2- Why the transformer core made from lamination plates?
A: We are authorized to answer the first question since the exact one wasn’t specified. Please submit a…
Q: Calculate the iron loss and copper losses of each transformer for full load condition in back to…
A:
Step by step
Solved in 4 steps with 3 images
- 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) No1.a. For performing dielectric-strength tests on insulating materials, two transformers are connected in aA. parallel combination.B. cascade arrangement.C. polyphase arrangement. 1.b. In large power transformers, the unequal voltage distribution caused by voltage surges in the winding isprevented by the use ofA. static shields.B. series capacitors.c. low-voltage arresters.1-Why the transformer core made from lamination plates? 2- Why core losses remain almost constant at any load? 3- Why O.C.T. is generally performed on L.V. side (not at H.V. side)?
- transformers Transformer I want a short answer please 1. The number of devices required to perform the no-load test and the short-circuit test for transformers. 2. Explain the steps of conducting a no-load experiment for transformers. 3. Explain the steps for conducting a short circuit test for a transformer. 4. Draw a circle diagram..No load test 5. Draw a circle diagram. Short circuit test 6. What is the benefit of conducting a no-load test and a short-circuit test for transformers? 7. What does the reading of the gauges used in the no-load test and the short-circuit test of transformers represent? 8. If the frequency of the supplied source changes from 50 to 45 How will the electromotive force of the secondary be affected? 9. Are there other ways - besides the load and no-load test - to test transformers and extract their constants more accurately? What is it? Sumpners test 10.. Number of types of transformers in the laboratory and compare them in terms of working principle and work…12.a. Comparing the transformer cores of core-form and shell-form transformers shows that thea. shell form provides lower reactance without increasing the transformer size.b. core form makes possible wider coils and better oil circulation.c. shell form is used exclusively in small low-voltage transformers.12.b. Distribution transformers are generally protected from damage due to excessive internal temperatures,by the operation of aA. lightning arrester.B. circuit breaker.C. surge diverter.A transformer has primary and secondary turns of 1250 and 125 respectively. It has core cross-sectionof 36 cm2 and its rms flux density is to be limited to 1.4 T (to prevent core saturation). Whatmaximum 50 Hz voltage can be applied on the primary side and the corresponding open-circuitsecondary voltage?The core has a mean length of 150 cm and its relative permeability can be assumed to be 8000. Whatwould be the rms exciting current when the transformer’s primary winding is excited at a voltage ascalculated above? Also calculate the magnetizing susceptance as seen from primary and secondarysides.If the transformer were to be excited at 60 Hz, 1. What should be the maximum primary voltage for thecore flux density limit not to be exceeded? 2. What would be the magnetizing susceptance as seen oneach side in this case?
- What are the reasons for using transformer oil in power transformers and why are mineral oils preferred over vegetable oils?P2-Draw the equivalent circuit of a single-phase transformer and explain how the core losses are almost invariant to the load (current). How do they depend on the terminal voltages of the transformer? Also, using the equivalent circuit explain how the copper losses depend on the load current.Topic: VARIOUS TYPES OF TRANSFORMERS
- Figure Q1 shows a transformer core that has the primary winding (N,) of 500 turns and second winding (N;) of 250 turns. The absolute permeability (uo) is 47x10-7 H/m. Ignore the leakage flux. Show how the total MMF of the magnetic circuit is calculated, giving that the primary current (Ip) is 0.3 A and the secondary current (Is) is 0.2 A. Core Primary Winding Secondary Winding 20 cm N=500 turns 40 cm N,-250 turns 40 cm 20 cm 20 cm 20 cm Depth of Core=30 cm Leakage Flux Main Flux Figure Q1: Transformer coreAssign the following statements by "Agree", or “Disagree". 1- It is better to use ferrite core instead of iron core in power transformer. 2- The no-load losses are smaller in power transformers as compared with that of the distribution transformers. 3- The core cooling in core-type transformers is better as compared with that of the shell-type. 4- The inrush current can be reduced in transformers by using hard magnetic material core. 5- The inrush current can be reduced in transformers by using soft magnetic material core. 6- The inrush current can be reduced in transformers by using hard magnetic material core with low residual magnetization. 7- The inrush current can be reduced in transformers by using soft magnetic material core with low residual magnetization. 8- Increasing the stacking factor will increase the weight of the transformer. 9- The hysteresis losses is the most effective part of iron losses in transformer. 10- The transformer design procedure is still depending on…When 2200 volts, 60 Hz is impressed on a certain transformer, the core loss is 240 Watts. When the frequency of the impressed voltage is changed to 25 Hz and the voltage is reduced to maintain the same flux density as before, the core loss falls to 75 Watts. Neglect impedance drop. What is the hysteresis loss at 60 Hz?