Which element is highly conducting coppoer or gold?

3 Answers  

---

what is the working principle of soft-starter & how it diff. from VFD ?????????

5 Answers   L&T,

---

what is the difference b/w winding insulation class and winding temperature class?

6 Answers   Bhel, NDPL, NTPC,

---

in case of three phase induction motor,when it is connected to three phase supply,why the magnetic field is rotets around the armeture?

5 Answers   Hindalco,

---

How to increase the backup of three phase ups?

1 Answers  

---

In DC motor,the field MMF is given by NI.N-no.of field winding turns,I-excitation and both are constant.Then how could the main flux decreases due to armature reaction.

4 Answers   Bhel, IBM,

---

if field current decreases how can the speed increase in the unloaded dc series motor

1 Answers  

---

what is the main function of lbb protection

3 Answers  

---

What is ac and dc drive.

1 Answers  

---

Can any one provide the inspection procedure of MIMIC for VFD panel? Details: If someone wants to have a mimic in the VFD panel what are inputs considered for the mimic(like on,off,trip) whether we are able to add speed variation in the mimic(if so how can we get) and what are the parameters to be checked in the MIMIC during inspection?

0 Answers  

---

how "rabbit ACSR" conductors are more efficient than "weasel ACSR" conductors

1 Answers   AITM,

---

Comparing to AC transmission, corona & R in DC transmission is……. a) lower b) higher c) same

3 Answers  

---