20. Which one of the following conditions tends to demagnetize the core of a current transformer? A. Passing alternating current through the windings B. Breaking the circuit while load current is flowing C. Opening the primary at the peak of the cycle at heavy load D. Large overloads of short duration on the primary

Q: Choose which of the following current is in phase with the flux in the no load phasor diagram of…

A: At no load, transformer draws some current to meet no load losses.

Q: What is the material commonly used for construction of transformer core? Draw the B- H curve for…

A:

Q: A 440/110 V single phase transformer when operated at no load has 6 A No current takes at 0.25…

A: solution: Given data; single phase transformer: 440/110 V, no load current Io=6 A, cosϕo=0.25,…

Q: he de-rating of a heavily loaded transformer with harmonic currents is known as... O Q-factor O…

A: This method, used  to estimate by how much a standard transformer should be de-rated so that the…

Q: 4. Define voltage regulation of a transformer? 5. Full load copper loss in a transformer is 1600W.…

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

Q: Flag this question for future reference What is the test that can be conducted in the laboratory to…

A: In this question we have to determine in which test transformer impedance drops are dependent on…

Q: 1. In a transformer, which options are correct: A. Works on Faraday’ law and Ampere’s law B. DC…

A:

Q: A single phase 500/200 V ,55HZ transformer has an efficiency of 98% at full-load. Determine the…

A: Given input frequency = 55 Hz and no load terminal voltage = 200 volts full load terminal voltage =…

Q: Identify, which component of no load current supplies hysteresis loss, in a practical transformer?…

A: In the question choose the correct option?    which component of no load current supplies hysteresis…

Q: (a) find the eddy current frequency of 50Hz (b) find the hysteresis loss in watt at a frequency of…

A:

Q: The hysteresis coefficient of the core material of a power transformer is 110J/ m3. The eddy current…

A:

Q: It is desired to have a 4.13 mWb maximum core flux in a transformer at 110V and 50 Hz. Determine the…

A:

Q: A 400/230V, 50Hz, single phase  transformer has 200 turns on high  voltage side. Find turns ratio,…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: Explain the faults in transformer. Explain the construction and working principle of Buchhloz Relay

A: Currents caused by a failure on a transformer winding depend on the source, neutral grounding…

Q: When rated voltage at rated frequency is applied to a single phase transformer the hysteresis and…

A: Given, Hysteresis loss, Ph1=420 W Eddy current loss, Pe1=150 W Voltage in increased by 10%, V2=1.1…

Q: A single pahse transformer has 700 primary and 2100 secondary turns. The primary is connected to 400…

A:

Q: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In a single-phase transformer supply voltage 230V, 60 Hz. The supply voltage side has 500 windings…

A: According to the question we need to calculate the value of the maximum amount of flux.

Q: 4. When supplied at 230 V, 50 Hz, a transformer's no-load current is 5.0 A at 0.3 power factor. The…

A: Transformer is a static device which is used to step up/down the voltage/Current level. It is also…

Q: Figure Q1 shows a transformer core that has the primary winding (Np) of 500 second winding (N,) of…

A: Introduction: A transformer is a device that steps up or steps down the level of voltage without…

Q: A 22.5-kVA single-phase transformer is tested with a true-RMS ammeter and an ammeter that indicates…

A: Given data:Transformer capacity =22.5True-RMS reading =94APeak reading =204A

Q: 4. In a transformer, which options are correct: A. Works on Faraday' law and Ampere's law B. DC…

A: Transformer is a static device the transfer electrical energy from one electrical circuit to another…

Q: The open-circuit voltage of 240V and the full load secondary voltage of 220 V, then the % regulation…

A: The open-circuit voltage of 240V the full load secondary voltage of 220 V, then the % regulation of…

Q: current supplies hysteresis loss, in a practical transformer? a. None of these b. IM c. IC d. I0

A:

Q: Core losses of a single phase 400/240 V, 20 kVA, 50 Hz transformer is 700 W. Maximum efficiency of…

A: Given, Core losses of a single phase 400/240 V, 20 kVA, 50 Hz transformer is 700 W. (Pi=0.7 kW)…

Q: A 150 kVA, 2500/250 V, 50 Hz, single phase transformer has a no-load current of 0.75 A and a core…

A:

Q: A single phase 200/200 V ,55HZ transformer has an efficiency of 98% at full- load. Determine the…

A: for transformer output frequency = input frequency. and voltage regulation = no load voltage-full…

Q: Assume a single phase transformer with primary and secondary winding. Explain what would happen if a…

A: Transformer is a static device which is used to step up/down the voltage or current level without…

Q: Voltage control method connected across the load, to supply part of VAR required is O Shunt…

A: In this question we will define which voltage control method supply var connected across load...

Q: Determine the regulation of a transformer in which the percentage resistance drop is 1% and the…

A:

Q: A single-phase transformer has 500 turns in the primary winding. When it is connected to a 19, 120…

A: For a single phase transformer,Turns, N=500.Voltage, V=120V.Frequency, f=60 Hz.No-load current,…

Q: transformer the core loss is 100 watt at 40 Hz and 72 watt at 37 Hz, then eddy current and…

A: In this question , we have to find out Eddy current losses and hysteresis losses...

Q: A transformer core is laminated in order to .

A:

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: A transformer is operating at rated Voltage and Current and supplying a resistive load. With the…

A: The copper loss depends on the load resistance. When the load is increased, the copper load…

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.