Answer / ruddho

Percentage differential protection and high speed high set
overcurrent relay are used for 5MVA and above power
transformer.
Reference book:Switchgear protection and power system.

Answer / velu5185

1.EARTH FAULT
2.OVER CURRENT
3.OIL TEMPERATURE
4.WINDING TEMPERATURE

What is difference b/w Microwave and OPGW ??

1 Answers  

---

what is the diff. b/w balanced and unbalanced load..?

12 Answers  

---

Can HT cable(11kv cable) be used for 415V, 700A requirement.

5 Answers  

---

What is ERD used in Elevators??

1 Answers   Emerson,

---

prefer any good electrical engineering book.....it should be useful in the practical fied?

1 Answers  

---

---

If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

1 Answers   Focus,

---

Calculate torque developed by the 3-phase, 5 H.P., 4 pole induction motor runs at 1500 rpm A 23 N-m B 21 N-m C 10 N-m D 0 N-m

0 Answers  

---

What is the % number of various buses in a typical power system?

2 Answers  

---

what does hapen if suddently frequency doubled

1 Answers  

---

What is the formula to calculate the rating of a three phase air circuit breaker

0 Answers  

---

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

0 Answers  

---

what is the function of AVR in generator? how the generator maintain the frequency while varies the load?

1 Answers  

---