Answer / shahulsnfa

a breaker is normally used to break a ciruit. while
breaking the circuit, the contact terminals will be
separated. At the time of seperation an air gap is formed
in between the terminals. Due to existing current flow the
air in the gap is ionised and results in the arc. various
mediums are used to quench this arc in respective CB's. but
in VCB the medium is vaccum gas. since the air in the CB is
having vaccum pressure the arc formation is interrupted.
VCB's can be used upto 11kv

what is Real power and Reactive power ? what is difference between them ?

5 Answers  

---

Hello friends i am facing one problem in lighting panel. Frequently neutral link near to MCCB is burning(firing. What may be the reason for this one. Please answer me.

5 Answers  

---

what is tpdt

4 Answers  

---

what is impedence (Z) of transformer, what indicate in transformer , which perameter indicate in transformer

5 Answers   CTS, Suzlon,

---

What is Harmonic affects in power system. what is unit of harmonics and how to measure it. how much value should be in power system.

1 Answers  

---

Pls say , how we calculate lux / sq.ft, which formula used for calculation

5 Answers  

---

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?

13 Answers  

---

What is a soft start?

4 Answers  

---

What is meant by Creepage Distance in Insulators?

2 Answers   Areva,

---

what happen if steam turbine trip,g.c.b not open and excitation off and on condition?

1 Answers  

---

wat s the electronic device used in the fan regulators recently?

2 Answers  

---

When to use Oil Transformer type and When to use Dry type? What is the difference between both?

2 Answers   ABC,

---