It is desired to measure a current of about 150 o 180 amp. a. If a 5-amp ammeter is to be used in conjunction with a current transformer, what should be the ratio of the latter? b. With this transformer, what should the instrument deflection be multiplied by to give the true line current?

Q: A short circuit test on 10kva / 2400, 60 hz transformer yields the following result: 4.17 A, 200 V…

A: The solution is given below

Q: The open-circuit voltage of 248 V and the full load secondary voltage of 220 V, then the %…

A: Given Data: open circuit voltage = 248 V full load voltage = 220 V

Q: Equivalent circuit parameters R1 = 1ohm, X1 = 2ohm R2 = 0.0035 ohm X2 = 0.0045ohm Xm = 1100ohm Rfe =…

A: If all the secondary quantities are referred to primary, we get the equivalent circuit of the…

Q: AC input= 120V rms. Transformer Ratio = 15:1. Reference Voltage = 6.3V. Rload = 56 Ohms. Ambient…

A: The circuit is given as The peak voltage at the primary side of transformer isVmp=2×120Vmp=169.7V

Q: (b) Tests are performed on 14, 5 KVA, 110/1110, 50 Hz transformer and the following results are…

A:

Q: and a full-load copper loss of 460 W. (a) The above transformer is to be connected as an auto…

A:

Q: Q2. A 25-kVA, 2300:230-volt transformer is subjected to open- and short-circuit tests. The…

A: No load (or O.C) power factor cos θo =203/(2300*0.110)=0.80∴ θo = cos-1 0.80          = 36.86ºsin…

Q: 2. Define the voltage regulation of the transformer?

A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Q: What is the efficiency of a transformer coupled class A amplifier for a supply of 12 V and output of…

A: Given- Transformer coupled class A amplifier- Supply = 12 V, Output of V (peak) = 12 V, To Find- The…

Q: The primary winding of a transformer connected to 2,200 volts circuit consists of two coils which…

A:

Q: A different name for the product of effective voltage times effective current is type your answer.…

A: Effective voltage and effective current is also known to be RMS voltage and RMS current.

Q: What is the use of current transformer? Draw it's block diagram.

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Q: When an ohmic load is connected to the secondary of a 220/110 Volt transformer (primary voltage is…

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Q: Question 1 I need the answer to be supported by a diagram or an equation 1. What is the purpose of…

A: 1.The purpose of lamination the core of the transformer is to reduce the Eddy current losses in the…

Q: 222

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Q: 1) What happens to the waveform of the magnetizing current of a power transformer as the transformer…

A: Dear student, Since you have posted multiple questions, we will provide the solution only to the…

Q: What is the function of the DC motor armature Choose one answer: a. Performs the function of force-…

A: According to guidelines we need to solve only the first question. According to the question we have…

Q: given the boolean function F F = A + CD + (A + D')(B' + D) (a) convert F to a sum of products.…

A:

Q: 1. Explain the variations of current in a step-down/step-up transformer with increasing voltage…

A: The variation of current in a step-down/step-up transformer with the increasing input voltage, There…

Q: (10 kVA, 200/20 V, 50 Hz values are written on the plate of a 1 phase transformer. The values given…

A: Given table,parameterOpen circuit test readingsV200 VA2.7 AW120 wattsAsked to find the Open circuit…

Q: voltage transformer has 1500 turns of wire on its primary coil and 500 turns of wire on its…

A: As per our company guidelines we are supposed to answer only first three subparts kindly repost the…

Q: I need the answer as soon as possible

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Q: Which of the following is the range of excitating current (in percent) of its rated current for a…

A: Exciting current is the current which is required for the excitation of the transformer. There are…

Q: If a voltage source is applied to the primary while

A: The circuit diagram of a transformer and its equivalent circuit resolving the Inductors can be drawn…

Q: A 3 kava, 500/250 V, 50 Hz, step-down transformer has the following parameters: Re1 = 3.5 ohm, Xe1 =…

A: A 3 KVA, 500/250 V, 50 Hz, step-down transformer  parameters: Re1 = 3.5 ohm, Xe1 = 4.5 ohm, Rc1 =…

Q: 38. (a) What should be the rating of a current transformer to measure a line current of about 75…

A:

Q: I need the answer to be supported by a diagram or an equation.

A: 1) Transformer action means developing an emf with the principle of mutual induction. When the…

Q: There are two types of tap changing transformer. Briefly, explain the operation and the function of…

A:

Q: A two-winding transformer rated at 9-kVA, 120/90-V, 60-HZ has a core loss of 200 W and a full-load…

A: The given data is shown below:

Q: 5) A flyback converter has an input of 45 V, an output of 15 V, a duty ratio of 0.4, and a switching…

A: Given: A flyback converter has: Input voltage, Vs=45 V Output voltage, Vo=15 V Duty ratio, D=0.4…

Q: Equivalent circuit parameters R1 = 1ohm, X1 = 2ohm R2 = 0.0035 ohm X2 = 0.0045ohm Xm = 1100ohm Rfe =…

A: In the idle running conditions, we assume all losses to be zero. Hence the efficiency will be 100%…

Q: A transformer contains equal number of turns in the primary and secondary side. Which of the…

A: The turns ratio 'a' is given by :  a = N1/N2 Where N2 = no.of secondary turns.          N1 = no of…

Q: The winding of a potential transformer is connected in with the power line. ...........** Select…

A: C. Primary , parellel

Q: The rating of a current transformer is expressed as 20VA/10/15. Assume that the secondary resistance…

A:

Q: If the total power in the secondary winding of the single-phase transformer increases then the…

A: find explanation below

Q: 1. The following measurements were obtained from tests: carried out on a 10-kVA, 2300:230-V, 60-Hz…

A: The open circuit test, also known as the no-load test, is one of the standard tests performed on a…

Q: 3.12 The following data are obtained when open-circuit and short-circuit tests are performed on a…

A: Part a solution is in image 1 Now exciting addmitance is Ym=1/xm =1/5004.02  mho

Q: A 200/400V, 50Hz, 1-ohm draws a current of 0.7A and power of 70W when rated voltage is applied to…

A: Given transformer with 200/400 v,50 Hz Open circuit test  current I0=0.7 Apower P0=70 wRated voltage…

Q: Example 1: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results:…

A:

Q: Draw a transformer with a turns ratio of 4:1. The primary source voltage is 480 volts. What size…

A:

Q: 4. The power measured in an open circuit test on a transformer corresponds to:   A) Losses in…

A: to find the power losses measured in open circuit test of the transformer