A 5 KVA, 2300/230 V, 50 Hz transformer was tested for iron losses with normal excitation and copper losses at full load and these were found to be 40 W and 112 W respectively. Calculate the efficiency of this transformer at 0.8 p.f. for the following KVA outputs 1.25, 3.75 & 7.5

Q: 1. If a 0.6 accuracy class current transformer has a phase angle of + 10 at 100% rated current, the…

A: Ans.(1). Value of 'β=10'

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

A: Given that  3-phsee , 11000V/416V , delta connected Xmer   S3ϕ=1000 KVAr1=1.45 ohmr2=0.0006…

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: A 3000/200V ,50hz. , single phase transformer has a cross sectional area of 150 cm2 for the core. If…

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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: iii. No-load current 3. If the ratio of V/F has been kept constant and the observed value of…

A: Q.1) Explanation 1)When the frequency is lowered (for slower motor speed), the magnetic field…

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

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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: For the 13-kVA, 1540/220-V transformer shown in Figure (2): a) Calculate the full-load voltage…

A: Given, E1 = 1540 VE2 = 220 V Z1 = 4.4 + j6.5 ΩZ2 = 0.042 + j0.048 Ω Where, R1 = 4.4 ΩR2 = 0.042 Ω…

Q: The idle operating current of the three-phase transformer connected to Yy0 (Y-Y) with a power of…

A: Given transformer with rating 6300 KVA and 15/0.4 KV The no load current I0=2.91No load active power…

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: -V 50-Hz distribution transformer is tested for efficiency and regulation as follows OC. test( Low…

A: Note: We are authorized to answer three sub parts at a time, since you have not mentioned which part…

Q: The voltage per winding of the 220V/12V, 60 Hz single phase core transformer is 1V. If the maximum…

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Q: A 3000V/4400V, single-phase transformer takes a no-load current of 0.5A and the iron loss is 200W.…

A: We will solve this question by using the no-loaad conditions of the transformer.

Q: A 4500 V / 360 V, 50Hz single-phase transformer is to have an approximate e.m.f. per turn of 25 V…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 3. A transformer has resistance and reactance in per unit as 0.01 and 0.04 pu respectively. What…

A: It is given that: R=0.01 puX=0.04 pucosϕ=0.8 pf lagging and leading

Q: The resistance and reactance of the primary winding of a 440/110 V single phase transformer are 4.4…

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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: A 200-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV and is…

A: Given:Rating of transformer=200kVAThe transformer is delta/star connectedvoltages are given as…

Q: 1. Explain why transformer saturation occurs at a lower voltage value when the frequency of the ac…

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Q: A 35KVA, transformer has 50 Hz frequency input with voltage values given as 300/220V, with primary…

A: It is given that: kVA=35 kVAf=50 HzV1V2=300220N1=550

Q: AC power of 100 volts and 1 ampere enters a transformer with 2 coils and exits the transformer with…

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Q: talk about coreless transformer

A: The brief explanation is as follows.

Q: DC 200 V was applied to the primary of a transformer with a conversion ratio of 1/5. Obtained from…

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Q: A single-phase transformer 11000/420 V, 50 kVA, 50 Hz has resistance and leakage reactance as…

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Q: In a single-phase transformer induced electromotive force per turn on secondary winding is Select…

A: Let E2 be the induced electro magnetic force in secondary winding and N2  be the number of turns in…

Q: A 1-ph transformer 25kVA, 330/110V, 50Hz, Req2 = 0.0452 and Xeq2 = 0.06592 draw the Kapp regulation…

A: Single Phase Transformer: A single phase transformer is a transformer that uses only one phase of…

Q: A H.W.R. uses 4 : 1 transformer and a diode of internal resistance 100. If load resistance is 5000…

A: Given a half wave rectifier uses, Transformer with turns ratio, Np : Ns= 4 : 1 Internal resistance…

Q: If a transformer is assumed ideal, then the flux intensity of the core approaches: a value that is…

A: In this question,  Choose the correct options What is flux intensity of the core if transformer is…

Q: 391. A transformer has maximum efficiency at load copper loss (P.), is of full load. The ratio of…

A: Given, Transformer maximum efficiency at load factor, x=34.

Q: Can efficiency be determined for a single phase transformer under open circuit test ?and if so…

A: Open circuit test on transformer: Open circuit test on a transformer is done to determine the no…

Q: A single-phase transformer is rated at 50 kVA. The transformer has full load copper losses of 450 W…

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Q: Complete the blank The copper loss of a transformer at 4/5 of the full load is 4000 W,  full load…

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Q: A transformer core is laminated in order to .

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Q: Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer.…

A: It is given that: No-load primary voltage=V1=200 VNo-load secondary voltage=V2=400 VFrequency=f=50…

Q: Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer.…

A: Transformer is the static device it work on the principle of faraday law of mutual inductance. It…

Q: A single phase 220/6 Volt, 50 Hz transfc has a rated primary current = 0.5 A. its maximum efficiency…

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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.