Question

A 3 phase, 3.3 kV industrial plant has an overall power factor of 0.88 lagging. A...

A 3 phase, 3.3 kV industrial plant has an overall power factor of 0.88 lagging. A 200 kVA synchronous motor is added to the system and is run at zero power
factor and slightly reduced rating to provide power factor correction only. The total load is then 350 kVA at unity power factor. It was then decided to run the synchronous machine at its rated kVA and use it as a source of mechanical power, what gross mechanical power would it produce
with the overall power factor of the installation at:
1. unity and
2. reduced to 0.96 lagging.

Answer: 1 65.67 kW; 2 197.87 kW]

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

In case you have any or you did not understand any step please feel free to ask your doubts in the comments section. I would be happy to clarify it .

DO GIVE A THUMBS UP !!

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE DO THE QUESTIONS STEP BY STEP AND IN NEAT HAND WRITTING THE ANSWERS ARE GIVEN WITH THE QUESTIONS 1)  A 3-phase synchronous motor having a mechanical load (including losses) of 122 kW is connected in parallel with a load of 510 kW at 0·8 p.f. lagging. The excitation of the motor is adjusted so that the kVA input to the motor becomes 140 kVA. Determine...
1. A single phase circuit has a load of 500kVa at a power factor of 0.707...
1. A single phase circuit has a load of 500kVa at a power factor of 0.707 lagging. Calculate the kVA of the capacitors needed to improve the power factor to unity 3. When connected to a 120-v(rms), 60Hz power line, a load absorbes 4 kw at a lagging power factor of 0.8. Find the capacitance necessary to raise the pf to 0.9 4. A three phase motor draws 20kva at 0.707 power factor lagging from a 208V source. Determine the...
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a resistance of 0.401 /phase...
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a resistance of 0.401 /phase and a synchronous reactance of 3.21 /phase. If the generator is supplying a load at a power factor of 0.8 lagging and at rated KVA, calculate the change in line voltage at the output terminals of the generator if the load is suddenly disconnected. Assume the speed and the excitation current is to remain unchanged.
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE DO THE QUESTIONS STEP BY STEP AND IN NEAT HAND WRITTING THE ANSWERS ARE GIVEN WITH THE QUESTIONS 1) . A station supplies 250 kVA at a lagging power factor of 0·8. A synchronous motor is connected in parallel with the load. If the combined load is 250 kW with a lagging p.f. of 0.9, determine : (i) the leading kVAR taken by the...
A three-phase industrial load consists of 136 kW at 0.8 power factor lagging. What size capacitor...
A three-phase industrial load consists of 136 kW at 0.8 power factor lagging. What size capacitor bank is required to correct the power factor to 0.95 lagging
Q1. A 3-phase, 400 V synchronous motor having a power consumption of 50 kW is connected...
Q1. A 3-phase, 400 V synchronous motor having a power consumption of 50 kW is connected in parallel with an induction motor which takes 200 kW at a power factor of 0·8 lagging. (i) Calculate the current drawn from the mains when the power factor of the synchronous motor is unity. (ii) At what power factor should the synchronous motor operate so that the current drawn from the mains is minimum.
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA...
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA at a FP = 0.8 lagging with a line voltage of 450-V. The machine stator resistance RS = 0.004 ?. The synchronous reactance is Xs=0.08 ?. The actual system load on the machine draws 900 kW at FP = 0.6 lagging. Assume that a voltage regulator has automatically adjusted the field current so that the terminal voltage is its rated value. Mechanical losses are...
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance...
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance of 3-ohm, resistance neglected. It is supplying a 12-kW load with initial power factor of 0.86 lagging. The windage and friction losses are 2.0 kW and the core losses are 1.5 kW. Determine (a) the motor efficiency; the line current; armature current; and excitation voltage. (b) If the flux of the motor is increased by 20 percent determine the excitation voltage; armature current; and...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE DO THE QUESTIONS STEP BY STEP AND IN NEAT HAND WRITTING THE ANSWERS ARE GIVEN WITH THE QUESTIONS 1) 1. What should be the kVA rating of a capacitor which would raise the power factor of load of 100 kW from 0·5 lagging to 0·9 lagging    ANS (125 KVA) 2)    A 3-phase, 50 Hz, 3300 V star connected induction motor develops 250 H.P....
Please be clear in conceot and handwriting, thank you. A 20 kVA three-phase synchronous machine is...
Please be clear in conceot and handwriting, thank you. A 20 kVA three-phase synchronous machine is connected to a 480 V, 60 Hz electrical service. The per-phase armature reactance is 80%. Armature resistance is negligible, as are all other sources of power loss. Part A: Motor Configuration The machine is configured to run as a motor. Its rated mechanical power is 20 HP and it is 94% efficient. The motor provides rated output mechanical power. The excitation is set such...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT