Answer / dileep gopalakrishnan

in case of air circuit breaker the Arc quenching medium
between fixed & moving contacts is air...air at high velocity
is passed between two contacts at the time of CB opening thus
arc is removed...In case of Vacuum circuit breaker two
contacts are placed in vacuum bottles...so no electron flow occurs in vacuum becoz no media to conduct electricity...

Answer / dileep gopalakrishnan

in case of air circuit breaker the Arc quenching medium
between fixed & moving contacts is air...air at high velocity
is passed between two contacts at the time of CB opening thus
arc is removed...In case of Vacuum circuit breaker two
contacts are placed in vacuum bottles...so no electron flow occurs in vacuum becoz no media to conduct electricity...

We store the d.c supply...then why can't we store A.c supply???

4 Answers  

---

what is differant beetween overload current and phase current?

0 Answers   KMJ, Petron ltd,

---

Is it required to do earthing in 2nd shop if earthed armoured cable is laid from 1st shop ?

0 Answers  

---

how many joint can done in HT line and what is life of the joint

0 Answers   Micro Labs, Reliance,

---

How many turns are there in primary winding? (In Transformer)

0 Answers   Philips,

---

When geneartor is running in poor lagging side power factor its excitation current increases then it is running in improved lagging side.Kindly tell me when gen is running in leading side what will happen

3 Answers  

---

what is the formula of starting current of 3phase and 1 phase motor???

0 Answers   L&T, WFP,

---

application s to shunt coil

0 Answers  

---

how can we change the phase angle b/w two phase?

2 Answers  

---

What are the different auxiliary protections of a transformer?

1 Answers   CESC,

---

we use Dyn11 trafo for distribution purpose, if it`s possible for replacing Dyn1. if it`s change means what will happen?

1 Answers  

---

What is the difference between single phase, 2phase, and 3 phase motors?

2 Answers  

---