what is the diff. b/w restricted earth fault relay & standby earthfault relay and where they are used?

4 Answers   KSK Energy, Reliance,

---

why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer.

12 Answers   ABB, Adani, Central Electricals, Electrical, HCL,

---

What is power factof?

21 Answers   RRB,

---

what is ripple component in ac supply?

2 Answers  

---

What is dynamo function in DG sets and draw block diagram?

0 Answers   KPR Agrochem,

---

What is a variable speed motor?

3 Answers  

---

what is the use of vector group in transformer. means what r the application of various vector groups?

5 Answers  

---

which has more heat effect(dc or ac)

4 Answers   CCEL, TATA,

---

Why the Voltage rises when Leading Power Factor is occurs?

2 Answers  

---

what happens when we give supply to the secondary of a transformer ?? for example 415v(pri)/110v(sec)

2 Answers  

---

What types of testing in 11Kv Ht switchgeat during testing?

3 Answers   TCE,

---

What is non-minimum phase transfer function?

0 Answers  

---