Answer / guest

Excuse me if my answer is wrong......

ON LINE TRANSFORMER- Here we can change the tappings even
the transformer is connected in load.

OFF LINE TRANSFORMER- Here cant change the tappings when
the transformer is connected in load.

Answer / sunil ulange

ya definitely above answer is correct..

But they asked question like this instead of ON LOAD TAP
CHANGING TRANSFORMER & OFF LOAD TAP CHANGING TRANSFORMER ..

Answer / upen

Generally 11kv/415v is off load and above it on load this in 11/415v u must disconnect load first

why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?

2 Answers  

---

i(1)= j0.5 p.u., i(2)= -j0.5 p.u., i(0) =j1 p.u. What kind of fault it is-- a)l-l ,b)l-l-g, c)l-l-l-g, d)l-g.

2 Answers   Areva,

---

why do transformer humm ??????????

2 Answers  

---

Can we parallel lise the secondary side of the two similiar transformers with same voltage ration, imp, but with different vector groups.. ( for ex. 11 KV / 6.6KV two trfs but different vector groups can we parallelise both of them ,, what happens if we parallelise them

1 Answers  

---

how the length effects the ampacity of the cable? if a cable is carrying a current of 100A for 50m length then what will the effect on current if we double the length?

2 Answers  

---

why we use 50hz frequency in india why not other frequencies like 52,59,42 etc

5 Answers   INTC,

---

What happen if 200KVAR capacitor continuesly connected to load and all the plant machinaries are not in working?

4 Answers  

---

hi....I am from india..i have completed my engineering in electrical and electronics field with 58.4% and my IELTS score is 5.5 bands....Recently i received my I-20 in computer and information science from Troy university in Alabama.On 18th i have a visa interview can u please tell me what type of questions i have to answer ??????

0 Answers  

---

How many straight through joint is permissible in single core 33kv XLPE cable for a length of 985 mtr.

3 Answers   DMRC,

---

to operate air conditioner of 1.5ton what power of generator is required

1 Answers   Bharat,

---

What is mean by hormonics?

5 Answers  

---

what is the difference between oil surge relay and buchholz relay.

0 Answers   MPPEB, Suparco,

---