Answer / guna

VCB - Vacuum circuit breaker, which is used at HT side of
transformer(High voltage & low current side). the arc
quenching medium is vacuum.

SF6 - sulfur hexafluoride circuit breaker, which is used at
both HT & LT side of transformer..the arc quenching medium is
SF.

Answer / avinash pralhad nikam

The arc quenching capacity of SF6 is more than the vaccum. also sf6 has more IR value than that of vaccume . also sf6 is more electronegative than vaccum.

Answer / vidya sagar reddy

In VCB the arc quenching media is Vaccume. We can use up to 33KV. SF 6 arc quenching media is Sulfur hexa fluoride gas. Which is very effective comparing with VCB. Available only above 33KV.

Answer / jitender

sf6 breaker has low maintenance other than the vcb
it's life is more than vcb.

how to identify conection leads of an unknown electric motor

0 Answers  

---

how manyunits consumed by 25 kvar capacitor bank

2 Answers   MRF, Suzuki,

---

How to find the voltage drop for short,medium,long transmission lines of a 33kv sub-station?

1 Answers  

---

What is difference between MCC,PMCC,PDB?

2 Answers   Cipla, JSW,

---

why we short ckt the secondry vo5tage/ winding in transfr and motor?

2 Answers  

---

what do u mean by knee point voltage?

7 Answers   TATA,

---

In motors how many types of cooling systems were used?

0 Answers   NTPC,

---

hi there i am highly enthusiastic about discussing electrical concepts , and hence i wud lyk to invit al do intrested to join me at gtalk and hav a dscussun of the concepts , ad me as a freind . my email id is rakesh.2k99@gmail.com

0 Answers  

---

name the types of insulatter?

5 Answers  

---

How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

0 Answers   Alka Electromech, Aramco,

---

what is the difference betweem star connected motor & delta connected motor?

0 Answers  

---

what is the meaning of TPN

2 Answers  

---