Answer / arvind kumar pal

Power factor is nothing but angle between voltage and current. As the angle increases means pf lags result high requirement of currents which creates voltage drops. Therefore it can damage the equipments as equipments are designed as per their voltages

Answer / saqkhu

The disadv of lag pf is that it causes the voltage regulation
to increase towards maximum value due to which the o/p volt
decreases.
volt reg= (V no load - V full load)
= IR cos phy - IX sin phy
in case of lag pf the current is lagging i.e I<-phy
so , the volt reg
= IR cos phy + IX sin phy is more

What conditions are required for transformer to operate at low frequencies ?

0 Answers  

---

do you know measure the earth resistance?explain

1 Answers   Dalkia,

---

2 electric bulbs of 100w,200V are put in series & the combination of each bulb is supplied to 100 V . the power consumption of each bulb will be????????

4 Answers  

---

is it possible to flow currnet between earth and nutral wire in a circuit???

2 Answers  

---

how we calculate torque ? how we improve it ?where torque will either motor or generator ?

0 Answers   Reliance,

---

with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....

0 Answers   Divis Laboratories,

---

give 5 differences between relay and contactor

1 Answers   Texas,

---

what is The difference between national electrical code and I.S.Code (electrical) and what is the value of NEC in electrical engineering field

0 Answers  

---

What do you mean by isolators and circuit breakers?

6 Answers   Bhushan Power Steel,

---

While testing the value of the resistance for the earthing rod, two auxillary rods are connected to the earthing tester.What is the working function of a earth tester?

0 Answers  

---

DG drop how much freqency at 100% load?

3 Answers  

---

why rotor resistance starter is not suitable for squrielcage induction motor?why it is suitable for slipring induction motor?

5 Answers  

---