Answer / pradyumna chandra panda

Current leg or lead behind or ahead the voltage from maximum value ( from 90°) of alternative Qnty is called legging or leading power factor which is equal to rest valve ( 90° - legg / + lead) of sine ie. legging 36° of cose value ( .8 ) is equal to rest value of sine 54° (90°-36°) ie .8 Therfore we indirectly use sine value by appling cose value. Is this correct ? plz give your openion.

Answer / sarmadahmed

SINE and COSINE are both sinusoidal. They essentially have same properties but different values at different time but both are sinusoids and every wave having similar properties will be a sinusoid too. And the cosine term is there because of some trigonometric calculations, it could be sine too. Have a look at power triangle and you'll get the answer.

What is on delay and off delay timers

1 Answers   NCC,

---

What is meant by Guard relay ?

2 Answers  

---

what is phase angle ? and also tells me why my phase-phase voltages are 390 rather then my single phase voltages are 221 and 223 respectivly?

2 Answers  

---

What is the role of Tertiary Winding in Transformer ?

2 Answers  

---

What is different between MCB & MCC & isolator switch

1 Answers   Standard Chartered,

---

---

What are the methods used to improve powerfactor ?

6 Answers  

---

List some examples of renewable energy?

0 Answers  

---

which transfofrmer oil break down voltage strength get will be more if oil sample taken from bottom of tank or oil sample taken from top of the transfomer tank.

2 Answers   NPCIL,

---

which starter is used for synchronous motor

18 Answers   APTransco, IBM,

---

 where the Motorized mccb to be used? In Motor control center panel starters ,it is use full. please answer  

1 Answers   Voltas,

---

what will happen power cables laid without gap in underground

1 Answers  

---

What is various types of electrical formula?

1 Answers  

---