Is Indian railway uses 25000v ac or dc?

7 Answers  

---

How conventional fire alarm system works?

1 Answers  

---

How cmd is calculated in case of energy neters

0 Answers  

---

Why insulation layer of a High Voltage cable is more than a current carrying cable?

3 Answers  

---

how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.

33 Answers   Brookfield, BSNL, DMRC, Epoch, KPTCL, Polycab, Power Control, SIEA, Siemens, Wipro,

---

---

WHAT IS OLTC OF TRANSFORMER? WHERE IS ITS USED EITHER ON PRIMARY OR SECONDARY SIDE OF TRANSFORMER?

2 Answers  

---

How we can calc. the Backup time of a battery Bank???

6 Answers   Emerson,

---

How to increase the backup of three phase ups?

1 Answers  

---

List the time domain specifications.

0 Answers  

---

How much load can give on 1600 kva transformer 11kv/440

5 Answers  

---

in a transmission line if the load is suddenly increased in the receiving end of the system the phase shift will ?

1 Answers  

---

What is surge impedence and surge loading....???

1 Answers  

---