# Question-   Task 4.3 = (a) A 250 kVA, 11 000 V/400 V, 50 Hz single-phase transformer has 80 turns on the secondary. Calculate: (i) the approximate values of the primary and secondary currents; and (ii) the approximate number of primary turns; (b) The prima…

Solution-

You are viewing the complete free solution to this question:

Apply AC theory to solve problems involving transformers

(a) A 250 kVA, 11 000 V/400 V, 50 Hz single-phase transformer has 80 turns on the secondary. Calculate:

(i) the approximate values of the primary and secondary currents; and

(ii) the approximate number of primary turns;

(b) The primary and secondary windings of a 500 kVA transformer have resistances of 0.42 Ω and 0.0019 Ω respectively. The primary and secondary voltages are 11 000 V and 400 V respectively and the core loss is 2.9 kW, assuming the power factor of the load to be 0.8. Calculate the efficiency on

1st Page:

2nd Page:

Task 4.3 (4.3) (a) A250 KVA, 11 000 V/400 V, 50 Hz single-phase transformer has 80 tums on the secondary. Calculate: @ the approximate values of the primary and secondary currents; and Gi) the approximate number of primary turns (b) The primary and secondary windings of a 500 kVA transformer have resistances of 0.42 Q and 0.0019 Q respectively. The primary and secondary voltages are 11 000 V and 400 V respectively and the core loss is 2.9 KW, assuming the power factor of the load to be 0.8. Calculate the efficiency on @ fall toad; and Gi) half load.

# Our happy customers

They are fast in responding to homework questions. they have the best technical writers. Thanks for helping me with my programming doubts.

Dyana
5

I contact to disklib for homework, they help me out, despite there was some technical issue they gone through extra mile for me and provide me good quality work in first priority. 100% recommended.

Asif Waheed
5

Desklib's study resources are best & unique. Their study database is easy to access and easy to use.
100 % recommended.

Mike Taylor
5