i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value

0 Answers  

---

What is the difference between MCCB & MOCB?

1 Answers  

---

What is VCC?

1 Answers  

---

why is used for starters for staring motors?

6 Answers   Amrapali, L&T,

---

what is the use of ballast in tube

2 Answers  

---

---

What are the specific gravity of fully charged and fully discharged lead-acid battery?

1 Answers   Mukand,

---

wat is the importance of reactive power in power generation.....if it is zero means wat will happen to system........

22 Answers   Bhel, Jindal,

---

How to confirm the Phase shifting Transformer VECTOR GROUP relation , as below ZNy11.45d10.45-ZNYy0.15d11.15

0 Answers  

---

Define demand factor?

0 Answers  

---

What will be the resultant out put voltage when two different voltage rating batteries are vconnected in parallel? pls. answer with example if available.

1 Answers  

---

when the rheostat kept in minimum to maximum position in motors what will happen?

7 Answers  

---

What is Energy Audit..?

2 Answers  

---