A transformer has a turns-ratio of 8 and its primary is connected to a 240V, 50Hz supply. Figure 4c shows the simplified

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A Transformer Has A Turns Ratio Of 8 And Its Primary Is Connected To A 240v 50hz Supply Figure 4c Shows The Simplified 1 (47.46 KiB) Viewed 19 times

A transformer has a turns-ratio of 8 and its primary is connected to a 240V, 50Hz supply. Figure 4c shows the simplified equivalent circuit in which the magnetizing branch has been moved to the primary terminals. The transformer parameters, which are all referred to the primary are as follows: LM = 0.68H, 111 112 = 12mH, R₁ = 102, R₂ = 32 (i) Determine the magnitude of the magnetizing current Im. [2 marks] (ii) A 69 (actual value) resistive load is now connected to the secondary. Determine the magnitude of the primary current I1 [5 marks] (iii) Determine the efficiency of the transformer under this operating condition. [4 marks] R₁ In R₂ 1₁ 112' m 1₂ W m 240V 50Hz Im Lm R₁'