Q3. A 10-kVA distribution transformer has full-load efficiency at unity power factor of 95 %, the copper and iron losses then being equal. Calculate its all-day efficiency if it is loaded throughout...

Q3. A 10-kVA distribution transformer has full-load efficiency at unity power factor of 95%, the copper and iron losses then being equal. Calculate its all-day efficiency if it is loaded throughout the 24 hours as follows: 1- No load for 6 hours 2- Quarter load for 6 hours 3- Half-load for 6 hours 4- Full load for 6 hours Assume load power factor of unity.

Extracted text: Q3. A 10-kVA distribution transformer has full-load efficiency at unity power factor of 95 %, the copper and iron losses then being equal. Calculate its all-day efficiency if it is loaded throughout the 24 hours as follows: No load for 6 hours Quarter load for 6 hours Halfload for 6 hours Full load for 6 hours Assume load power factor of unity.