Q1) A 1.5 KVA, 220/110V, single-phase transformer has the following test data: Open circuit test: Voc 110 V, loc 0.4 A, Poc 25 W Short circuit test: Vsc 16.5 V, Isc=6.8 A, Psc= 40W %3D %3D %3D %3D %3D If the transformer supplies 80% of its rated load at 0.866 lagging power factor, (use approximate equivalent circuit), Calculate: a) The approximate equivalent circuit referred to H.V.S.

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 800/170V, 50 HZ, 1-phase transformer with cross sectional area of the core is 24 cm? and maximum…

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Q: A 900/150V, 50 HZ, 1-phase transformer with cross sectional area of the core is 28 cm? and maximum…

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Q: what are the factors affecting the dielectric strength of transformer

A: Mineral oil used as oil in transformer provides high insulating properties. It also provides cooling…

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

A: Transformation ratio K=0.416kV3*11kV=0.0218Per phaes…

Q: A 800/160V, 55 HZ, 1-phase transformer with cross sectional area of the core is 26 cm? and maximum…

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Q: A single phase transformer with the maximum value of flux 0.0991wb and an effective cross sectional…

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Q: Draw the construction diagram of the core type transformer

A: In core type transformer both the primary and the secondary windings are placed on the side limbs…

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

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

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Q: he ratings of a single-phase three-winding transformer are as follows: *primary winding: 300 MVA,…

A: Base MVA=300 MVARated primary side voltage=14 kV→terminal 1Rated secondary winding voltage= 200…

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: Transformer 1) Enumerate the way/s by which the voltage of the large coil may be: a) increased (AC…

A: The voltage in a coil is given by  V= -L(di/dt). So for an ac source the voltage of a coil is…

Q: The core loss of a single phase, 230/115 V, 50Hz power transformer is measured from 230 V side by…

A: Given- 230/115 V, 50 Hz power transformer, Core loss=1050 W, for 230 V, 50 Hz input, Core loss=500…

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 15-KVA, 2400/240-V transformer is to be tested to determine its excitation branch components, its…

A: The rated KVA of the transformer, S=15 KVA The voltage ratio, 2400/240 V, Results of open circuit…

Q: A single-phase transformer has a voltage ratio on open circuit of 7900/660 V. The primary and…

A: Transformer: It is a static device that is used to step up and step down the voltages.

Q: O Fuind Yız dan for the metuack I.-> 2. 2173F 1o 86-5 F

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Q: How is the EMF of a three phase transformer

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

Q: THE PERCENTAGE RESISTANCE AND REACTANCE OFA1-F TRANSFORMER ON LOAD ARE 3% AND 6 %…

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Q: A single phase 1.1 KVA, 50 Hz, 220/110 transformer has an Iron losses = 80 W and equivalent…

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Q: of the core is 30 cm² and maximum flux density is 1.3 Wb/m² , then the number of turns in primary…

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Q: Question 12 In N-R method of power flow solution, the number of iteration required for the…

A: The above statement is false.

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

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Q: The resistances of potential transformer winding is minimized by using a thick conductors and small…

A: Answer:a  thick conductors and small length of turns

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: In no load phasor diagram of practical transformer, the magnetizing current is with primary voltage…

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Q: A transformer has equivalent resistance referred to secondary R02 and reactance referred to…

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Q: The losses found in a transformer

A: There are two types of losses that occur in the transformer. 1. Core loss 2. Copper loss Apart from…

Q: f (a,b.c,d) d) = 11M(0,1,6,8, 11, 12) · I|D(3,7,14, 15)

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Q: Questions: 1. Why a short circuit test is done on the transformer with LV winding shorted and supply…

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Q: A transformer core is laminated in order to .

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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.