in a dc motor we supply current only to the armature conductors,from where is the field winding gets excited then??

3 Answers   RRB, Siemens,

---

WHAT IS THE SPECIFICATIONS CONSIDERED DURING DESIGN FOR THE OVER CURRENT RELAY?

3 Answers  

---

what is mean by hvdc transmission technology .what is principle of hvdc transmission and technic of hvddc transmission .

1 Answers  

---

explain different types of d.c motors?

0 Answers  

---

what is voltage,current,restance,. what is single phase&three phase motar. what is basic electrical 'farmoulas. what is defirens quetions of electrical maintenance.

2 Answers  

---

In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers  

---

Why are the laminations insulated from each other?

0 Answers  

---

WHAT IS DIFFERENCE BETWEEN idmt and instentanous relay? is idmt is used as back up protection or else?or when instantenous relay saturates IDMT will operate???

1 Answers   BK, REL,

---

Resistor switching is used in which type Circuit Breaker ? a) oil filled CB b) Air blast CB c) Gas filled CB

11 Answers   Engineers India Limited, wbsedcl,

---

What is the diffrence between PL Lamps and CFL Lamps

5 Answers  

---

I want d.g.set our company

0 Answers  

---

Do you know the faults occurs generally in motors and how to rectify them?

4 Answers  

---