Answer / noor

Advantage is it's cooling the winding temperature and
protect transformer winding insulation.
disadvantage regular monitoring for oil temp. and silica gel
breather.

Answer / lohith

advantages:- this
trafo life is more
and protections
also more then
outdoor system
disadvantages:-
cost is very high

what should be distance between phase to phase in 415v system?

1 Answers   NTPC,

---

In an panel board if the outgoings are power plugs and motor equipments...what should we choose as the incomer of the of the panel board?? MCCB OR ISOLATOR?? Should we use ELCB protection??if so where??

2 Answers  

---

What is the difference between the watt hour meter and Var hour meter in terms of internal connection and work theory . ie "When the meter records watt-hour an when the meter records var hours ??"

13 Answers  

---

how is working bearing heater?

0 Answers   ONGC,

---

comparision between mcb,mccb,elcb,flcb,elcb in details

0 Answers   ABB,

---

Why are tertiary windings used in transformers?

2 Answers  

---

What is the diameter of electromagnetic field around a 11000/415v transformer ? Dose it affect people who live 3-4 meter beside it?

0 Answers  

---

why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

4 Answers  

---

What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?

0 Answers   HPCL,

---

why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??

0 Answers   Descon,

---

IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace.

1 Answers   Jindal,

---

how inductance related to number of turns in a choke

3 Answers  

---