In: Electrical Engineering
A three phase transformer of 200MVA, 33kV/380kV, Yd11 is
delivering nominal power at cosφ = 1....
A three phase transformer of 200MVA, 33kV/380kV, Yd11 is
delivering nominal power at cosφ = 1.
- Calculate the nominal primary and secondary line
current.
- Calculate the winding ratio n of this
transformer.
The primary line current is 15,9A during an open circuit test.
The measured power per phase is then 53kW. During a short circuit
test (at nominal current), 271V primary line voltage is measured at
cosφ = 0,225.
- Calculate the total iron losses and total copper losses of
this transformer.
- Calculate the total iron losses if the transformer would be
connected to 16,5kV (primary side).
- Draw the single-phase equivalent circuit of this
transformer. Give also the phase quantities of the voltages and
currents and indicate what the circuit elements
represent.
Please show process and computations with
comments.