Answer / iamdon

In ACB(Air Circuit Breaker) arc extinguishing and
insulating is carried out in air medium where as in VCB
(Vaccum Circuit Breaker)it is carried out in low vaccum.
At high voltages, air inonises and losses its dieectric
properties which makes the ACB unsuitable at HT.Thats why
ACB is used at LT not at HT.

Vaccum can suastain high voltage(not ionises) and does not
losses its dielectric properties which makes the VCB
suitable for HT.

Since VCB is costlier and require more maintenance as
compared to ACB.So VCB is not employed for LT where cheaper
option as ACB is available.

Author:arbelectbit@yahoo.com

in cable joints procedure what electrical problems have been solved out ?

1 Answers  

---

what is difference between 5A and 100A CT constructional wise and operation?

1 Answers  

---

How much is the starting current for HPMV lamps. How many lamps can u wire in a circuit

1 Answers   Technip,

---

please give me solution to rectify the emi(electromagnetic interference)

0 Answers   Powergear,

---

How to test the vector groups of 3 winding transformer & phase displacements

2 Answers  

---

---

State the formula for overall efficiency of thermal power station

0 Answers  

---

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and why

6 Answers  

---

How to test transformer

1 Answers  

---

what is the function of turbo in dg sets

1 Answers  

---

phase colour is indicated by R Y B (red yellow blue) but in transformer i have seen U V W instead of (R Y B) have any meaning of this

3 Answers   Areva, Kim Yew,

---

why we use 25 kv in railway .not 11kv, or 33 kv

2 Answers   ISRO,

---

Please tell me if you are electrical engineer,and you are appointed for the maintainance of Electrical Power plant,then which parts of the plant deal with you.Also tell how these parts/components work.

1 Answers  

---