ETO ETO Exam papers 📅 Apr 2023

Exam Question

(a) Explain the potential hazards if liquid-cooled transformers are used (6)

(b) What are the losses in transformers? Mention the various factors which aftect these losses in a 25 KVA, 3300/233 V, single phase transformer, the iron and full-load Cu. losses are respectively 350 and 400 watts. Calculate the efficiencies at half-full load, 0.8 power factor (10)

Reference Answer

(a)
(b) Given:
$KVA \space = \space 25$
$\cos \phi \space = \space 0.8$

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