I need an expert's solution to the following questions in a simple manner, without too much explanation. 1. List the different loses in a transformer? 2. Draw (output-vs-efficiency) of a transformer? What is the condition for maximum efficiency? 3. If a transformer is operated at rated frequency but at voltage higher than the rated value, what do you expect the following quantities to change? a) No load current. b) Hysteresis loss. c) Eddy current loss.

Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source whose voltage is e1(t)=100(1| t |)volts for 1t1ande1(t)=0 for | t |1 second. A2- farad capacitor is connected across winding 2. Sketch e1(t),e2(t),i1(t),andi2(t) versus time t.

The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core transformer.

Why is it important to reduce the moisture within a transformer to acceptable levels during transformer installation?

The first picture is the question the second pic i did not understand that step of %75 of the load means what ?

2-An ideal transformer consists of a primary winding (100 turn) and a secondary winding (1000 turn). The secondary winding is connected to a resistance (50 ohm). The amount of electric current in the secondary winding which equil to , when the voltage on the secondary winding is 100 volts

Q1: During the separation of transformer core losses experiment: 1. Why should always keep the ratio of V/F constant? 2. If the transformer is operated at rated frequency but at voltage lower than rated value, how do you expect the following quantities to change? And why? i. Hysteresis loss ii. Eddy current loss ii. No-load current 3. If the ratio of V/F has been kept constant and the observed value of hysteresis loss at rated frequency of 50 Hz is 18 W, the measured value of core losses is 35 W, Find the total core losses at the frequency of 60 Hz. Q2: a) Determine the efficiency of three-phase 400 kVA, 11kV/ 380 V transformer at over-loading condition by 15% of its rated with unity power factor load. The copper and iron losses at full load are 16 kW, 4 kW respectively. b) State one or more of the ways to reduce the losses that taken place in transformers. Q3: At the parallel operation of three-phase transformers: a) Give an explanation for the following cases: i. Two-lamps are…

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Please explain the solution

Flag this question for future reference What is the test that can be conducted in the laboratory to understand the transformer impedance drops are dependent on the load current with a variation in the secondary voltage? O a. Direct Load Test O b. Open Circuit Test OC. Voltage Ratio Test O d. Polarity Test