A) Name two types of Transformer equivalent circuit and then compare them.
Q: Derive emf equation for an ideal transformer
A: We will use faraday law to derive EMF equation of ideal transformer.
Q: Explain the open circuit test on single phase transformer.
A: Open circuit test :- It is carried out at rated frequency & rated voltage to determine the core…
Q: - Why polarity checking is necessary for the parallel operation of single phase transformer.
A: Hello. Since you have posted multiple questions and not specified which question to solve. We will…
Q: Explain in detail "phase shift in star delta transform" for positive and negative sequence voltages.…
A: Types of phase sequence in unbalanced system Positive phase sequence Negative phase sequence…
Q: Draw and explain the efficiency characteristics of transformer and regulation characteristics of…
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Q: Write the specification of transformer and voltage regulator
A: Transformer: At constant frequency, The device that converts electrical energy from one ac circuit…
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: ii) Derive the expression of EMF induced in a Transformer? Why is a transformer rated in KVA?
A: The basic circuit of the transformer is shown below: In the above circuit: Current losses are…
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: DHA) a) Draw an equivalent circuit of a current transformer and derive expressions for ratio and…
A: Equivalent circuit of current transformer The equivalent circuit and phasor diagram of current…
Q: 1) How can you prove that Lsec = Lan (RI/ Rs) for matching impedance with the ideal transformer?
A: We are authorized to answer the only single question at a time since you have not mentioned which…
Q: Differentiate an ideal transformer and a practical transformer. Explain the ideal and practical…
A: Before differentiate between ideal and practical transformer let us understand the basics of simple…
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: Explain the working principle of "Transformer" as usual Electromagnetic induction application.
A: Transformer: An item utilized in the transfer of electric energy is a transformer. AC current is…
Q: 2) With the help of illustration given below, evaluate with a discussion the points mentioned in the…
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Q: What conclusions you can come up with after implementing open circuit test on single phase…
A: Conclusions from open circuit test on single phase transformer
Q: Name two types of Transformer equivalent circuit and then compare them.
A: Since both the question are not interrelated as per the guidelines of Bartley we supposed to answer…
Q: Discuss the relationship between the operating frequency and the transformer size? Through your…
A: Considering the EMF equation of the transformer, E=4.44×f×Bm×N×A Here, E is emf, f is frequency, Bm…
Q: how to do a transformer empty and short-circuit test, what are the most important parameters and how…
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Q: What are the advantages of the star/star connected transformer? And why it is preferred by many…
A: advantages of the star/star connected transformer?
Q: Let a 5kVA, 400/200 V transformer be approximately represented by a 2Ω reactance referred to the…
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Q: "The per unit value of impedance, voltage and current of a transformer are not same regardless of…
A: Per unit value is given as Per unit = actual value / base value
Q: What is the advantages and disadvantages fot testing transformer?
A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…
Q: Detailed conclusions we can come up with after conducting open circuit test on single phase…
A: According to the question we have to, Detailed conclusions we can come up with after conducting an…
Q: what is the Formulae of short test of single phase transformer and Formulae to determine efficiency…
A: If, Wsc = Full load copper losses Isc = short circuit current Vsc = short circuit voltage Equivalent…
Q: Explain the steps that are required to use an ideal transformer in order to match a 500 ohn load…
A: Solution- Let, Where Vs = source voltage Zs = source impedance ZL = load…
Q: why is there preferable use isolating transformers with cascade transformer unit , if the power…
A: Autotransformers are also known as Isolation Transformer. This is due to the fact that their…
Q: (a) Describe the main difference between ideal transformer and practical transformer with help of…
A: In this question need to describe the main difference between ideal transformer and practical…
Q: Determine the transformer equivalent circuit parameters.
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Q: Discuss the potential transformer with neat schematic diagram.
A:
Q: List and describe the types of losses that occur in a transformer
A: Transformer is a static device . Hence there will not be friction or windage losses . The only…
Q: (a) With the aids of sketch and electrical circuit diagram, briefly describe the two types of…
A: The two types of transformers are, Shell type transformer Core type transformer Shell type…
Q: Three Phase Transformer connections: Discuss Fully the various methods available for transforming…
A: The methods of transformation of a 3-phase voltage into higher or lower 3-phase voltages is done…
Q: What are the advantages of Delta connection in high power transformer?
A: Transformer : It is an electrical device used to transform the voltage from one level to another.…
Q: Draw the general diagram of a single-phase transformer and briefly show how it works.
A: Transformer: A transformer is just a stationary device that converts electric energy from one…
Q: 1. Let a 5-kVA, 400/200 V transformer be approximately represented by a 2 Q reactance referred to a…
A: We are authorized to answer the first question since the exact one wasn’t specified. Please submit a…
Q: at happens if one phase of a 3-phase transformer fails?
A: Primary delta connected and secondary star connected: If the primary (delta) side loses one phase of…
Q: Explain the difference between transformer equivalent circuit and IM equivalent circuit.
A: Equivalent circuit- An equivalent circuit is a simplified circuit (or model) that is easier to…
Q: 8. What is a cascaded transformer? Explain why cascading is done? Describe with neat diagram, a…
A: The transformer has a primary and a secondary side. It converts electrical power to electrical power…
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: Draw the equivalent circuit for a single-phase transformer with all the components referred to the…
A: Equivalent circuit of transformer refer to primary
Q: Discuss any three consequences of using a step-down transformer before the transmission of…
A: Consider the general structure of the power system containing generation, transmission, and…
Q: What is ideal transformer?
A: The transformer is the device that is used to step up or step down the voltage, and it works on the…
Q: 1. Discuss in detail about the tap changing turansformers. Explain how tap: changing transformer is…
A: Tap changing transformer
Q: Draw a complete circuit diagram describing a transformer
A: Electrical machines can be either generator, transformers or motors. They can be either Ac machines…
Q: What is the effect of frequency on mutual induction of Transformer?
A: We know that E = 4.44 f N Bm An As we see Induced EMF ie.( mutual induction ) is directly…
Q: Describe the difference of output for a power supply versus control power transformer.
A: to describe the difference of output for a power supply versus control power transformer.
Q: During short-circuit test of a transformer, which winding must be short-circuited? Why?
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Q: Explain the working principle of a transformer.
A:
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- 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.The core of a transformer operating at 50 Hz has an eddy current loss of 100 W/m3 and the corelaminations have a thickness of 0.50 mm. The core is redesigned so as to operate with the same eddycurrent loss but at a different voltage and at a frequency of 250 Hz. Assuming that at the new voltage themaximum flux density is one-third of its original value and the resistivity of the core remains unaltered,determine the necessary new thickness of the laminations. Clear and detailed solution.A transformer with normal voltage impressed has a flux density of 1.4 Tesla at rated frequency and a core loss comprising of 1500 W eddy current loss and 3200 W hysteresis loss. What do these losses become under when increasing the applied voltage by 12% and decreased to 68% of rated frequency. Your answer
- 10. In a transformer, the leakage flux of each wind- ing is proportional to the current in that winding because (a) Ohm's law applies to magnetic circuits (b) leakage paths do not saturate (c) the two windings are electrically isolated (d) mutual flux is confined to the core. 11. In a two-winding transformer, the e.m.f.per turn in secondary winding is always.........the induced e.m.f. power turn in primary. (a) equal to K times (b) equal to 1/K times (c) equal to (d) greater than. 12. In relation to a transformer, the ratio 20: 1 indi- cates that (a) there are 20 turns on primary one turn on secondary (b) secondary voltage is 1/20th of primary voltage (c) primary current is 20 times greater than the secondary current. (d) for every 20 turns on primary, there is one turn on secondary.A small single-phase 60 Hz transformer has 10.2 W at no load. The core has a volume of 750 cm3. The maximum flux density is 10,000 G and the hysteresis constant of the core is 0.0005. Using the Steinmetz law on hysteresis loss, find the eddy current loss.Can you help me set up equation to find this, I dont need solved just how to set up for a toroid transformer, I have already found Reluctance. The flux linking of winding 2 if the current in the winding 1 is -4 A, and the current in winding 2 is 2 AIgnore leakage inductance. Please help...
- Derive the mutual-inductance of 2-winding IT in terms of the physical parameters of the transformer.The primary ofa certain transformer takes 1 A at a power factor of 0.4 when connected across a 230 V, 50 Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. Sketch, and explain briefly, the phasor diagram for this condition, neglecting voltage drops in the transformer. What is now the value of the primary current?391. A transformer has maximum efficiency at load copper loss (P.), is of full load. The ratio of its iron loss (P.) and full
- The iron losses in a transformer core at 50 Hz are 1600 W. If the frequency is increased to 60 Hz while keeping flux density constant the iron losses are 2000 W. The iron losses at 40 Hz with flux density, will be (approximately) ?The primary of a certain transformer takes 1 A at a power factor of 0.4 when connected across a 230 V, 50 Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. Sketch, and explain briefly, the phasor diagram for this condition, neglecting voltage drops in the transformer. What is now the value of the primary current?An iron core is most often used in an AC transformer to1.provide a better coupling between the primary and secondary coils2.any of the choices mentioned3.to increase the magnitude of mutual inductance4.to channel most of the magnetic flux from primary to the secondary