Answer / k.prakashchandra

To dehydrate the windings.In view of high level of water /
moisture content in insulation ,it is recommended to
thoroughly dehydrate the windings by subjecting to vacuum
heating and drying after untanking the oil.Care should be
taken to see that the tank would not buckle due to the vacuum.

Answer / santosh

vaccum creating to check any leakage point.

Answer / byd

Generally Hermetic Onan transnformer vaccume before oil
filteration and after oil filling,, because if there is
any air inside of transformer tank and oil then we
apply anergy after there will be short circuit and
insilation resistances will be min, and IEC 60076-1 High
voltage test, if transformer is 33kv, you should apply
mono phase to HV winding as 70kv for 1 minute,, if there
is any short circuit it means oil didnt vaccume ,, or
there is some insilation wrong ,, i am sorry my english
is not good

what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

0 Answers  

---

What is the starting current of a DC Motor?

2 Answers  

---

why transformer not used to starter

1 Answers  

---

Where servomechanism is used?

0 Answers  

---

what is the working difference b/w softstarter and Variable frequency drive ?

6 Answers   Parle,

---

harmonics filter

0 Answers   SEHA,

---

How to measure the capacity/rating of a distribution transformer in KVA?

0 Answers  

---

how to calculate the transformer losses.

4 Answers   Cipla,

---

What do you mean by reach and reach the point of the relay?

0 Answers  

---

what is dol starter

1 Answers  

---

1.Difference between vcb and Acb and partes. 2.Difference between STS and ATS.

2 Answers  

---

what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

0 Answers  

---