Calculate the terminal voltage of the synchronous generator in the diagram. 12/240 KV 어 j100 Q V₁ 90 MVA X-9% 90 MVA X-7% 12.48 KV 37.29 KV 13.601 KV 19.56 KV 240/70 KV 55 KV 50 MW 0.8 pflagging 貨

Sine wave A has a positive-going zero crossing at 40°. Sine wave B has a positive-going zero crossing at 45°. Determine the phase angle between the two signals. What signal leads ? A Y-connected system can have wires. The (resultant) voltage between the hot legs (135V) is The phase angle between the phase voltage and the line voltage of a A-connected generator is degrees. The phase current produced by a certain 20V, Y-connected generator is 12A. The corresponding line current is A certain A-connected generator produces phase voltages of 30V. The magnitude of the line voltages are When the turns ratio of a transformer is 20 and the primary ac voltage is 6V, the secondary voltage is If 20W of power are applied to the primary of an ideal transformer with a turns ratio of 8, the power delivered to the secondary load is The turns required to match a 500 source to a 1000 load is

Instantaneous power output of a 3-phase 60 Hz generator will not be constant under following condition: O A. The load is unbalanced. O B. The load draws both real and reactive power. O C. The load draws only reactive power. D. None of the other choices O E. The load draws only real power.

The regulation of an alternator is likely to be negative in case of resistive load O True O False

The reactive power output of an alternator is limited by load angle True False

A generating station has the following daily load cycle: Time (Hours)0-55-8 8 – 12 12 – 15 15 – 20 20 – 24 Load (MW) 20 40 60 50 80 40 Draw the load curve and find (i) maximum demand (ii) units generated per day (iii) average load and (iv) load factor.

A synchronous generator is generating 330 V at 60 Hz at a field current of 3A. The e.m.f generated when the frequency is 35HZ and the field current is 2.9A is Harmonics generated in a machine due to the change in the reluctance of air gap is Answer: Ir mothod is called pessimistic method as the requlation calculated is always more than the actual result.

The synchronous generator of thermal power station will have a large number of poles True False

Instantaneous power output of a single phase 60 Hz generator will not be constant under following condition(s): O A. The load draws only reactive power. O B. The load draws only real power. O C. None of the other choices O D. The load draws bothreal and reactive power. E. The load is unbalanced.

H* 3G zain IQ Asiacell The generator convert from PV to PQ if the active power of the generator exceed the * maxinum and minimum limits between the maximum and mimium limit equal to the load power Non of them With base voltage of 450 kV. The actual voltage of the generator is 560 kV. The magnitude voltage in the parameter of the PV generator in the nepaln software is * O 1.2444 pu O 450 kV O 124.44 % O 0.8036 pu 80.36 % Non of them