A single-phase, two-winding transformer is rated 20 kVA, 480/120 volts, 60 Hz. The transformer equivalent resistance and reactance referred to the high voltage side are 0.1728 and 0.84 ohms, respectively. The transformer core loss at rated voltage is 200 W. When the transformer is loaded by half the rated load at 0.8 pf lagging and rated load voltage, the copper losses was found to be 75 W. a) Draw the transformer equivalent circuit referred to the HV side and draw its phasor diagram for the given load condition. b) Determine the transformer voltage regulation and efficiency at half load and 0.8 pf lagging. c) Determine the necessary load to be added in parallel to the original load (given above) to obtain maximum efficiency while making the system power factor equals to 0.9 lagging.

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 2400/240 V, 200 kVA, single phase transformer has a core loss of 1.8 kW at rated voltage. Its…

A: A 2400/240 V, 200 kVA Single phase transformer- Core loss Pe=1.8 kW, Equivalent resistance Reqv=1.1%…

Q: 3.16 A single-phase, 50-k VA, 2400/240-V, 60-Hz distribution transformer has the following…

A: It is given that:

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: 4. The core loss of the single phase 2200/220-V, 50-Hz transformer is measured using the low-…

A: It is given that:ϕ=cos-10.1ϕ=84.16° voltmeter reading=240 VExciting current=1  AWattmeter reading=24…

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

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: Two transformers A and B of different ratings but equal voltage ratios share a load of 900 kVA at…

A: Load  SL = 900 KVA   0.8 pf lagging transformer  A  rating is  600 KVA transformer  B  rating is…

Q: For an ideal 2-winding transformer, the armpere-turns of the primary winding, N1/1, is equal to the…

A: For the magnetic circuit, the magneto-motive force is given as:

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.