Answer / ranjan,(wartsila)

i want to add 1 extra point with above answer,

In HTside current is lower than LT side,because of that
during tap change over arking will be less in HT side.

Answer / pasang, avit, chennai

Tappings of the transformer irrespective of either
Distribution or power transformers are on the HT side due
to the following reasons.

1. The HT windings have more No of turns than the LT
windings so that the flexibility of Stepping up and
stepping down is easier with more tappings.

2. The tap changing is easy and safe considering the
Voltage level and also the requisite voltage level either
step up/down can be acquired

Answer / kanaksinh

i agree above both answers good

Answer / animesh pal

1) In hv side current is low .so used switches ,circuit
breaker will be cheaper even though bushing is required.

2) in lv side if no of turn is reduced max flux density
will be increased [E constant].As we want flux density to be
at knee point,so flux density will be in saturation
region,iron loss increase,temp rise increase,efficiency
decrease.But for hv side max flux density will be
decreased.so loss will be less...

In LRS how much water PH value maintain for good operation of motor?

3 Answers  

---

how we calculate the 30 KW 3phase electric motor current on noload

23 Answers   Monnet, Siemens, SSR, Supermac Industries,

---

when we given 3 phase supply to ups system, but out put comes with 3 phase + neutral how it possible? pls explain.

3 Answers   Enzen, Juniper Networks,

---

If R and Y terminals are short circuited,then power will cut. we all know that power cannot be stored.what will happen to already generated power at power station?

3 Answers  

---

What are the factors which influence the choice of specific magnetic and electric loadings of a synchronous machine?

0 Answers  

---

---

Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

1 Answers  

---

We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11KV switch yard having 12.5MVA power transformer. Some times we draw power during emergency. It is observed that during Export or Import for load less than 500Kw the power factor is decreasing to 0.3 . This is happening only during export or import. During island condition TG power factor OK.Our capacitor bank is provided with our Power plant auxilliary load. Please suggest how I can we improve our power factor during low load (GRID).

3 Answers  

---

is it possible to run a dc motor on ac supply with good performance.....?

3 Answers  

---

What is diffrence bitween electrical and electronics ?

4 Answers  

---

what is high and low cut off voltage of BB and DG at SPS????????

0 Answers  

---

Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage

0 Answers  

---

pls tell me about ups internal connection & we have given only 3 phase supply to ups system how get 4 wire (R Y B N )

0 Answers   Bhel, IBM,

---