SSC JE Electrical Engineering 2012 Paper

Question : 105 of 200

Marks: +1, -0

A 3-phase transformer has its primary connected in delta and secondary in star. Secondary to primary turns ratio per phase is 6. For a primary voltage of 200 V, the secondary voltage would be

2078 V
693 V
1200 V
58 V

Validate

Solution:

V_2/V_1=N_2/N_1

V_2

= 6 × 200 = 1200 volt per phase

V_2= √3 ×1200

= 2078V

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