Answer / ananya

Active power is the energy supplied to run a motor, heat a home, or illuminate an electric light bulb. Reactive power provides the important function of regulating voltage.If voltage on the system is not high enough, active power cannot be supplied.Reactive power is used to provide the voltage levels necessary for active power to do useful work.Reactive power is essential to move active power through the transmission and distribution system to the customer .Reactive power is required to maintain the voltage to deliver active power (watts) through transmission lines.Motor loads and other loads require reactive power to convert the flow of electrons into useful work.When there is not enough reactive power, the voltage sags down and it is not possible to push the power demanded by loads through the lines.”

Answer / uditparashar

Zero reactive power means the transmission line is purely resisitive which is practically not possible, even though if it happens there will be no losses in transmission

Answer / kartik

But, Ananya why we are always try to reduce reactive power?

What is dc induction motor ? and how to control its speed ?

1 Answers   HAL,

---

Can any body describe me why a soft starter is used for 6.6kv induction motor instead of VFD ?

1 Answers   Cairn,

---

CT Ratio of a energy meter connection is Red Phase : 100/5A, yello Phase : 50/5A & Blue phase : 100/5 A what is the overall Multiplication factor

0 Answers  

---

What is the difference between UPS and SMPS?

7 Answers   Mukand, NightFox,

---

Which fault is caused by lightening and thuderstorm a. Line to line fault b. Single line to ground fault c. Double line to ground fault

1 Answers  

---

why to use 50hz only in tansmisson and as well as in distribution why not60hz?

2 Answers  

---

Waht will happened if reactive power increase in the line? waht about active power increase too?

3 Answers  

---

Application wise, where we should use AC motors and where we should DC motors?

1 Answers   Nespak,

---

Frequency of rotor emf in induction motor is around A same as stator frequency B 50% C 5 % or below D 30%

1 Answers   Bhel,

---

how much earthings are mendatory at a 25kva sub station?

3 Answers   Bhel,

---

What is dynamo?How it works and what is the function of dynamo in a DG.

0 Answers  

---

Why birds seating in HT line does not get shock? If person hangs in HT line (single hand or both hands) does he get shock?

15 Answers   SSC,

---