Industrial load is taking 500kW at 0.6 lagging pf. It is desired to raise the pf to 0.866 lagging using synchronous machines whose power input is 300-kW. Calculate the KVA rating of the motor required for such operation and

A 240 kVA synchronous motor of rated apparent power consumes 95 kW of active power of the power grid. And it is possible to adjust it so that by working with this same active power, it compensates the power factor by providing reactive power (i.e., appearing with a capacitive component). How can you get this? What is the maximum reactive power that it can provide?

A 6-pole motor turns at 1080 rpm when connected to a 60 Hz voltage source. Most nearly, what is the angular velocity of the slip? OA. 27/3 rad/s O B. TT rad/s OC. 2π rad/s O D. 477 rad/s

Real Power Versus Voltage curve may be used to assess the a.Steady state voltage stability b.Loading of that particular AC Generator c.Dynamic voltage stability d.Complete Voltage stability   2- kinetic energy stored in the rotor of a synchronous alternator is given by a.G * H * w b.m * a c.0.5*m*v*v d.S * H

V1 = 170 V f1 = 100 Hz 1) A single-phase load has an active power of P = 2 kW at V1 V @f1Hz and the power factor is cosφ = 0.75. This motor iscompensated to cosφ = 0.85 using a parallel capacitor Find the reactive power difference between compensated and uncompensated status (which will give the capacitor power) and calculate XC and C using the power difference value?

Q4 A 11 kV, 500 MVA alternator is connected to a slow C.B. through a bus-bar. Determine the three ratings of the C.B, the average RRRV, and the oscillation frequency knowing that it reaches the peak re-striking voltage with 100 µs time.

I need the answer as soon as possible

If the prime mover torque suddenly falls by a considerable amount, the damperwinding of the alternator witnesses the flow of a massive current through it, which further opposes the prime mover torque.True or False

A 25 MVA turb0-alternator is working on full load at a power factor of 0-8 and efficiency of 97%. Find the quantity of cooling air required per minute at full load, assuming that 90% of the total losses are dissipated by the internally circulating air. The inlet air temperature is 20° C and the temperature rise is 30° C. Given that specific heat of air is 0-24 and that 1 kg of air occupies 0-8 m3. [890 m3/minute]

A 5000 hp synchronous motor is running at full load with a leading pf of 87 percent and assuming 100% efficiency. How many kilovolt-amperes is it drawing? Select one: a. 4.3 kVA b. 4440 kVA c 4287 KVA d. 3730 kVA