Answer / ram niveth

offcourse we can use it if we didnt consider the clock
position ie, phase displacement in primary side.
but the condition is Neutral should not be earthed in
primary side .secondary neutral must be earthed

Answer / vinod

Main reason to use Delta in primary side is to reduce/Eliminate harmonics in primary side whereas star winding will not eliminate.

Answer / ssnslm

we can use the tr. in delta/star by disconnecting the
primary side winding teminals of each phase and reconnect
in delta in the primary side.

Answer / karthikeyan

definetly you should reconfigure your primary winding of
the Y/Y to D/Y as per requirement. or else you have to
brought out the neutral point of primary starwinding of the
now existing Y/Y transformer.Hence you can avoid unbalance
3 pashe current by availing neutral star point which will
balance the system. and one morer thing is that you should
earth the star point of the primary winding.

Answer / dolphinopera

in transformers the
starting and finishing
end of the phase
windings are brought
out. hence you can
connect the windings
either in star or in
delta. another
important thing, if the
star winding is used
without neutral there
is a possiblity of
damage of winding.

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 Answers  

---

What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

1 Answers  

---

What is an Air COmpressor

0 Answers   DLF,

---

how to calculate the earth fault current

0 Answers  

---

In a voltage-controlled current source A A current booster is never used B The load is always floated C A stiff current source drives the load D The load current equals Isc

0 Answers  

---

---

Why DG self motor winding burnt out?

1 Answers   Aegis,

---

what is the string efficiency

1 Answers  

---

What is transient Phenomenon?

0 Answers  

---

Hi, We facing one similar problem in our computers i.e we are newly constructed our design department after that shifted our computers but our computer desktop screen is vibrating. we are conducted our electrical maintainance person he told that is UPS problem, then we changed the UPS also again we are facing that problem in that room only. then we put lcd monitors that problem is solved. But in other monitors why the computer desktop screen is vibrating please give a suggestion to me. Regards, Raju.N.G

10 Answers  

---

can we say current flows inside an atom as electron moves inside an atom?

7 Answers   Vedanta,

---

A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.

1 Answers  

---

Define phase lag and phase lead?

0 Answers  

---