What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.

1 Answers  

---

In separetly excited m/c,we excite the field by a dc source,what not with ac source?

2 Answers  

---

what is a pf factor in generator.

3 Answers   CSEB,

---

When can we take Neutral as common neutral link?

0 Answers  

---

Why earthing is necessary for any equipment?

0 Answers  

---

what is the difference between 5P20 class CT , PS Class CT and 5P10 class CT??

5 Answers  

---

Hy the hydro power stations have high transmission and Distribution costs?

3 Answers  

---

explain why the armature voltage changes when the field rheostat is varied in self excited DC generator

2 Answers  

---

In EHV tranm. The conductors are …….. a) Cu roads b) Cu bars with Si c) Cu tube with Si plate

2 Answers   Engineers India Limited,

---

HOW TO CALCULATE UPS BATTERY BACKUP TIME

3 Answers   HSBC, VRVS,

---

What we mean by vintage of an engine+Generator?

0 Answers  

---

Why tripping not occur when the transmission breaks? Doesn't we provide earthfault protection for it?

1 Answers  

---