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]

Can we use delta-star neutral grounded 3 phase power transformer bi-directionally.

2 Answers   GMR,

---

Is LV shorted in magnettic balance test?If yes why?

2 Answers   Hindalco,

---

Can I use cable armour as a earth conductor? if not how many GI/CU wires I need to run along with cable?

1 Answers  

---

if acapacitor connected to power supply will it cosume power& will it going to get recorded in energy meter

2 Answers  

---

what is over frequency protection

1 Answers  

---

why battery room in substation is black coloured?

4 Answers  

---

How many types of electrical earthing are there?

0 Answers  

---

WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION

0 Answers  

---

what is the power factor

13 Answers   Heidelberge Cement,

---

why vector group used in transformer and what effective in output

1 Answers  

---

what is the main difference between power devices and signal devices

0 Answers   Wipro,

---

Which power will flow first if we switch on a motor? Active or Reactive? How?

5 Answers   NPTC,

---