why transformer is conneted to dc for polarity test.it doesnt work in dc?

1 Answers   ABB, KVPY,

---

how can we measure 220kv or more than these voltages ...?and also how can we conform whether we r getting 220kv from generating stations throuth the h v transmission lines?

1 Answers  

---

Transformer Specification say 66/11KV, 23/27/35MVA OFDAN,what is OFDAN? we know ONAN,ONAF or OFAF

2 Answers   Siemens,

---

Differnce between Analog & Digital

1 Answers  

---

What is the reason of using bus-bars on the secondary on the LT transformers?

2 Answers  

---

how to set the transformer differential relay

1 Answers   Divis Laboratories,

---

How much UG cable size should i use so as to accomodate a ground + 2floors house. A 1.5ton AC & geysers(2) in each floor with lightings

2 Answers  

---

l&t switch FN 63 handle position can we change

0 Answers   OPTCL,

---

In transformers Which type of connection is preferred for harmonics to be minimum. primary : secondary star without neutral:open delta star with neutral :open delta star without neutral: delta star with neutral : delta explain why

1 Answers   Genco,

---

Explain Buccholz relay in detail.

5 Answers  

---

what happens if DG N earthing fails while running and N Earthing fails while Transformer on load ???what will be the impact ???????/

2 Answers  

---

What determines the thickness of the lamination or stamping?

0 Answers  

---