Answer / thiyagarajan r

VCB means Vacuum Circuit Breaker.Vacuum Circuit Breaker is always used in the HT side of the transformer and it act like a On/Off switch and prevent the power system in case of any faults by using Vacuum as the breaking mechanism.

Answer / s b mutha

VCB is used for switching of Transformer. Over current, Short Circuit and Earth fault protection also incorporated in VCB to protect your valueable transformer. During swiching of ON and OFF its contacts make and break in under Vaccum Bottles to protect from heavy spark during fault and on load tripping.

Answer / thakur ankit

VCB= vaccum circuit breaker ...
Breaker disconnect power supply . like your fan an light switch . ON means fan , tv start working that is air circuit breaker ... But when you use high power circuit to disconnect like 11000 kV and 33000 ... The air gap between then is charged and supply might be get some voltage due to air electron get charged that is why we vaccum breaker vaccum.means you understand nothing between them that islive wire and other wire that is off... And above 132 kV u used SF6 circuit breaker

Answer / satya

VCB means Vacum circuit breaker .Its acts as a switchlike fan and light.We use VCB in upto 33KV and 11KV .Its a onload switch and separate two circuit .

What are test signals and their significance?

0 Answers  

---

what is the difference between RCCB and ELCB?

3 Answers  

---

how we calculate electricity unit ( meter unit.. for knowing how many charges) from on motor load.?

2 Answers  

---

My system is 22kv/3.3kv transformer. client is asking to use NGR, but as we have dedicated Neutral Earthing systems which has a value less than 1 Ohm. So i want solid comparision. Why i should not use NGR as my system is already protected.Can any one help me to get out of this.how should i reply on basis of some great comparision and calculations. Please help

2 Answers   Ariel,

---

how i prepare for the written test in mahagenco?

2 Answers   MahaDiscom, MahaGenco, Wipro,

---

What is Antipumping Function & If we have C.T how we find the Ratio ?

0 Answers  

---

What are the application of filter?

0 Answers  

---

which bridge is used to measure frequency?

2 Answers  

---

IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

2 Answers  

---

sir can you operated Transformer on frequency from that for which is design?

1 Answers   Kirloskar,

---

Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

0 Answers   Century Rayon, Mechanical,

---

what is the transiant condition in alternator? and how it can be prevanted?

0 Answers  

---