Answer / shibil

Types of Relays:

1.overcurrent relay
2.Earthfault relay
3.Motor protection Relay
4.Generator protection Relay
5.Bus Bar protection relay
6.Distance relay

what parameters are should nessary for control technic dc drive(in rolling mills)?

0 Answers   TATA,

---

What is power factor?

3 Answers   L&T,

---

When charging a 20 MVA , 33kV/6.6kV transformer through regulated (0-6.6 kV or 0-33 kV) source on no load , what will be the maximum current drawn by transformer from source and what sould be the source capacity.

5 Answers   TATA,

---

What is the speed of electrical supply?

3 Answers  

---

LT cable fault checking instrument is available? where and how to get it.

2 Answers  

---

What are the advantages of skewing of cage rotor conductors?

0 Answers  

---

what is V0/V rating of cable

1 Answers  

---

The sodium vapor lamp is not glows when it is connected a distance of 5 meters above from gearbox, why ?

0 Answers   Ispat,

---

what is a universal motor? how it works?

4 Answers  

---

After synchronization with grid how to maintain the power factor in lagging or in leading? if lead of lag what is the problem?

3 Answers  

---

trasformer ratting

2 Answers   Bhel,

---

What is clean Earth System ?

3 Answers  

---