Engineering, 06.03.2020 19:56, augestfaith

A three-phase grounded wye-delta connected transformer supplies a load. The load voltage is 480 V (line-to-line), the loads are: Phase ab is 25 kW with power factor 0.8 lagging; Phase bc is 10 kVA with power factor 0.75 lagging; and Phase ca is 47 kW with power factor 0.85 lagging. The transformer is rated 50 kVA, 12.47 kV / 480 V, 9.2%. Calculate: (a) the unbalanced delta currents in each phase (Iab, Ibc, Ica), (b) the unbalanced wye currents (IA, IB, IC), (c) the required supply voltages per phase (both line-to-line and line-to-neutral), and (d) the ground current at the wye side. Hint: place the transformer impedance at the wye side in series in each phase.

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, danksans7011

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Answers: 1

continue

Engineering, 04.07.2019 18:10, koolgurl2003

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Answers: 1

continue

Engineering, 04.07.2019 18:20, AnonymousLizard52303

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.

Answers: 3

continue

Engineering, 04.07.2019 19:20, dndndndnxmnc

The process in which the system pressure remain constant is called a)-isobaric b)-isochoric c)-isolated d)-isothermal

Answers: 3

continue

Do you know the correct answer?

A three-phase grounded wye-delta connected transformer supplies a load. The load voltage is 480 V (l...