Answer Posted / ravi

Differential Protection is intended to protect the
transformer windings. For this purpose we need to arrange
the CTs on both primary and secondary side of the
transformer and connect both the secondaries in such a way
that whenever the fault level increases above the threshold
value then the the associted relay will trip the power
circuit.

Proviiding the Dedicated N earth and individual Body Earths ,Finally these all looped /Now my Question :- will it not harm in case of Transformer Fault current flows in Dediacted N Earthing to Looped Body Earthing.

2138

---

After synchronization with grid what is the demand value QKVAR and how we will maintain that?

2214

---

what is meant by vector group of a transformer? How can it be derived?

1936

---

what is the effect of power factor of machines in starting current

2003

---

which fault is severe and why?between lll fault and lllg fault which fault is severe and y?

2451

---

Different types of relay fault which phase sequence??

853

---

What is the working principle of CFL & T5 tube light & 40W tube light with electronic ballast?

3888

---

any body,pls tell me how to done relay coordination ? how to coordinate by TCC curve?how to read the tcc curve?

2081

---

explain types of electric welding and its applications

1711

---

please describe the Transformer setting, Motor setting, I/C setting, Tie setting

1727

---

In the N-series schneider reclosers. What is the difference between current during fault time and current at tripping? This appears in the Event log in an event of a trip out.

1800

---

For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?

2018

---

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

1662

---

What is the efficiency during maximum power transfer?

1154

---

Load transfer in 11kv double busbar switchgear - operation.

1901

---