Answer / raji g

We can simply say that the power factor is how the machine
effectively consume the active power.For example if the
motor runs at 0.8pf it consumes 80% of active power and 20%
of reactive power.

Theoretically speaking the power factor is defined as the
cosine value of angle which between the voltage and current

Answer / subrat kumar pradhan

Power Factor means the angle between the voltage & current.
Its value varies of different type of equipments but should
maintain 0.99

Answer / arnab

Its the cosine of the angle between the voltage and current.
Form tranmission point of view, P = VI*pf,so for constant
voltage and current, power factor should be as near to unity
as possible to achieve maximum power, in practice from
transmission point of view its kept in between 0.9-0.95, but
again the higher the better [provided it's cost effective]

what is the use of buchzloys relay?

2 Answers  

---

what the different types of cables used for 11kv and 33kv over head work and what is the size of cable in sqmm.

2 Answers   Ordnance Factories Board,

---

which starter is used for synchronous motor

18 Answers   APTransco, IBM,

---

differentiate between remote backup relay and local backup relay?

1 Answers  

---

Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

0 Answers   MPSEB,

---

how to calculate energy meter multipling factor by ct & pt raitio

2 Answers  

---

What is the function of a capaitor in 1-phase IM?

1 Answers  

---

how many voltage or current enough to kill a person?

12 Answers  

---

how we have to calculate the short circuit current for 33/11kv 2mva, 7.5% Z, Transformer primary side breaker and secondary side breaker short circuit current for both sides?.

5 Answers  

---

Does the ferranti effect has some impact on the electricity billing system on high voltage installations?

1 Answers   IISc,

---

What is the value of specific gravity in charged lead acid batteries.

11 Answers  

---

Why ct secondary is not kept open while primary charged. Answer in terms of ct parameters.

4 Answers   Power Grid,

---