What is CRT (Contact Resistance Test) for Isolators or Dis- connector Switches? Why we performed it & whats the Testing procedure.

1 Answers   Siemens,

---

how will reduce the voltage. if 12volt/250ma transformer toreduce 6 volt

0 Answers  

---

What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

6 Answers  

---

How to calculate size of HT breaker with the help of Amp (current)? Please provide answers with examples.

0 Answers  

---

Why we use 2core cable for Dc motor.Can I use 3core?

5 Answers   JK Paper, Maharaja Whiteline,

---

whats the one main difference between UPS & inverter ? And electrical engineering & electronics engineering ?

16 Answers  

---

What is battery Limit ?

4 Answers   NDDB,

---

how test transfomer(3 phase75kva) by megger

0 Answers   HPL,

---

Explain What will happen when direction of field current is changed (i.e, field excitation is reversed) in the following machines? 1) Alternator 2) Synchronous Motor 3) D.C Generator ( Shunt or Seies ) 4) D.C Motor ( Shunt or Seies )

3 Answers   NTPC, Transco,

---

Does induction motor start with dc power supply????

4 Answers   Essar,

---

What is reason of rating of transmission line multi pal of 11 like as 11/33/66/220 ? Why not use 75 kv 23 kv line in power system ?

1 Answers   Apollo, Balco, Bhel, Vardhman,

---

can u give me a brief idea about power line carrier communication ??

0 Answers  

---