Answer / al kafaah

I think the transformers are soaked with normal operating
voltage level as testing with HV of the transformer
insulation, winding at site is impractical as well not
economical. Besides soaking allows the transformer
insulation to be tested for operating voltage such as oil
(so that oil inside is not breaking down) or winding
insulations, short circuits, inter-turn faults (though
these items are individually tested for its correctness at
site test, but not as a whole unit at Normal operating
voltage). Whereas the Switchgears and Cables which are
other Primary circuit components are tested with High
voltage even at site

Answer / japjeev

The soaking process is to determine the sufficiency of the
cooling oil for continuous operation under temperature and
duty cycles.

If an outage occurs placing heavy load currents on a
transformer it must be assured that it will survive without
exploding, melt-down, etc

Answer / larry dorich

Soaking a transformer before putting a load on it is Definitely old school. Transformer Mfg.'s recommended energizing with voltage even at 50% of rated Voltage @ 50/60 Hz for 24 hours .The 60 Hz allowed the oil to saturate all the paper insulation in the windings. With out doing this the paper would burn @ full load which really would de rate the Transformer & contaminate the oil.

Answer / j.kesavan

sorry friend, soaking trs we are using in vsd drives why we
want to reduce the hormonics in power system.

In VSD (variable speed drive)I/P and O/P connections given wrongly what will happen?

5 Answers  

---

All the voltage drops and the source voltage added together in a series circuit is equal to

2 Answers  

---

how can synchronous generator can be used as synchronous condenser?

3 Answers   Monnet,

---

Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?

0 Answers  

---

what is the potential of 11kv A.B.Switch

1 Answers   Power Grid,

---

---

Dear friends I want to design busbar for1600 kva transformer(i.e2100 amps) what are all the factors to be considered before selectinga busbar what are all the standard sizes of busbars what is the formula for finding current of copper and aluminium busbar

0 Answers  

---

what bridge circuit is used in Tandelta circuit

1 Answers  

---

plz tell me the potential difference between phase and netrul

2 Answers   CGL,

---

PLZ sent the previous year question paper for GET in NHPC on my EMail id ppshanker@gmail.com

0 Answers   NHPC,

---

show the single line diagram of star delta starter with single phase preventer

0 Answers  

---

why we use 6nos of C.Ts on 11kv incoming?

2 Answers  

---

If we touch the Capacitor terminals you feel shock after the capacitor was put in operation and not in case of inductor though both are energy storage elements.why?

4 Answers   HAL,

---