Open circuit and short circuit tests on a three phase, 50 kVA, 7200V/208 V, 50 Hz Y-Y connected three phase transformer is conducted by exciting it from the secondary side. The tests produced the following results:

(a) Find the per-phase power dissipated, line current and phase voltage for the open circuit test.

(b) Find Rc, Xm of per phase primary referred equivalent circuit as shown in the below figure using your answers in (a).

(c) Find the per-phase power dissipated, line current and phase voltage for the short circuit test.

(d) Find Req, Xeq of per phase primary referred equivalent circuit as shown in the below figure using your answers in (c).

 

Transcribed Image Text:

Short Circuit Test with primary Open Circuit Test short circuited 500 W Power dissipated (Psc) Power dissipated (Poc) Open Circuit Line Current (loc) 8.0 A Line to Line input Voltage (Voc) 60 W Short Circuit Line Current (Isc) 4.01 A Line to Line input Voltage (Vsc) 208 V 10.4 V Short Circuit Test with primary Open Circuit Test short circuited 500 W Power dissipated (Psc) Power dissipated (Poc) Open Circuit Line Current (loc) 8.0 A Line to Line input Voltage (Voc) 60 W Short Circuit Line Current (Isc) 4.01 A Line to Line input Voltage (Vsc) 208 V 10.4 V

Answer rating: 100% (QA)

Given Data 5042 YY transformer SO KUA 7200 208 V Soow a Power dissipated phase 16666w 3 li... View the full answer