Question

- The Student Name Surname Student Academic Number Exercici A single-phase transformer with a TRVA rating has a 380 primary and a 220V secondary. The load scross the secondary draws acusent at a power factor of 61% leading The frequency of the power supply is son: Determine the primary and secondary full-load currents of the transformer 21 Deduce the value of turn ratio 3) Calculate the active and reactive power of the transformer Explain the result 4) Calculate the peak flux linked by the secondary winding of the number of tum at the primary is 120 ums S) Draw the phaser diagram Note lire dhe pastor diagramthe current is alemas reference Page 112

Answer 1

4.) Giver Ny = 120 Rating - Ikon Np Ns VS Vp: 380V -> Step dem Tranmer Ns - 220v NP = 380 Ns 720 RF: Cost = 0.6. (ra) 1) Pilmary full load Current at (primary) - No: 7o torns Emp per turn a 220 = 444 fam. Curent Kunde my e pe Xx? -- 2- -). 3-14 . 4-44 X 50 m Am 314 2. 0.0141 4-44 x 50 py Serboy full load ca 1.. XD 220 V -> Ts 4.55 met ondery = 0.6141, weber 2). He wensforma. To formale given by > 0519 9. bou vazbu D-579 given ab 57.90%. The brains de Ar penere >) we know that The podel: for power + kootte Pouc - Logo H ob Real power vi cos LOS = 1x06 - Orkva sh Roux power = vi sino - 10:32 0-6 53.130