Answer / md. faruque

A combination of disconnect switches and breakers used to isolate equipment in substations. It refers to electrical equipment that regulates the flow of electricity within an electrical system. It is used by utility providers and private facilities alike for two reasons: to prevent overloads and short circuits, and to de-energize circuits for testing and maintenance. The most familiar types of switchgear are circuit breakers , fuses & lighting arrestors, which interrupt the flow of electricity to a circuit when its current becomes too high and directly pass the surge voltage to earth.
Main considerations in apparatus protection – transformer, generator and motor protection – protection of busbars. Transmission line protection – zones of protection.CTs and PTs and their applications in protection schemes.
Types of circuit breakers – air blast, air break, oil, SF6 and vacuum circuit breakers. Types of lighting arrestors are- horn gap, expulsion type, gapless metal oxide type etc. It is also classified on the basis of class.

Answer / k.prakashchandra

Switch gears include c.b.and isolators

Answer / younas

what is the important think in switchgear room

What are the different sizes of cables for H.T and L.T side of supply?

7 Answers   Bhel, BSES, Karthik Industries, Lanco, Nedco, Shilpa Electrical Engineers, TATA, Torrent Power,

---

How do ACB are maintenance, what are the problem occurred in ACB

1 Answers   KIML,

---

what is the voltage level which is used in transformer short circuit test

1 Answers  

---

if an alternator or turbine using fuel to produce ele energy and we didn't connect load to the ends then where was gone the ele energy

2 Answers  

---

what is the function of choke in a tubelight

3 Answers  

---

what is the basic principle of operating of a television camera tube?

0 Answers   Student,

---

why excitor coil of an alternator can fail

3 Answers  

---

Why the transformers making noise?

2 Answers   L&T,

---

which supply is used in traction system

3 Answers  

---

How to Convert horsepower to kva? what is the three phase formula? explain me if u can Example..i have 50Hp Moter how can i convert in kva tell me formula three phases Rehan Smileavail@msn.com

4 Answers   Bajaj,

---

what is the difference between cable routing and scheduling?

4 Answers   Techno Labs,

---

How many types of colling system it trformers?

0 Answers  

---