Q6
a three-phase, 415v load takes a line current of 750a from a 3000/415 v delta-star transformer.
the 3 kv system is supplied from a 11/3 kv kv star-star transformer.
assuming no losses;
(a) draw the circuit diagram.
(b) calculate line and phase values of voltages and currents in each part of the circuit, and the turns ratio of each transformer.

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281