Answer / sandep

load is depend on p.f.
say pf=1 then load is=10kw and 25kw
for pf .9 then load is=9kw and 22.5kw

Answer / aruloli

Dear Friend
You forgot to furnish few more data i.e Voltage rating of
primary and secondary.

If i assume Voltage rating for 10 KVA Transformer as 230
V/110 V (Primary/secondary)and considering as single phase .

primary load current is calculated as

P=VI

10*1000(VA)=230*I
I=43.47 A

Secondary current is ,
90.90 A

Considering Transformer as 3 phase, then

P=1.732*v*I

Primary load current is

10000=1.732*230*I

I=25.10 A

Secondary is,

52.48 A

Answer / k.sri405

10 kva & 20 kva means transformer apparent power that is
combination of active and reactive power so we can load this
transformer below its rating coz load means only active
power .but in case of purely resistive losd we can load this
transformer upto its rating but practically purely resistive
load is not possible.

Answer / kaleem

aroluli which voltage we'll use ? line to line to line to line to ground ?? 230 or 400 this formula to calculate 3 phase current ?? p= 1.73 v i cos@

Answer / dkverma67

For 3phase transformer
10 KVA=10*1.4 Amp=10.4 Amps maximum
25 KVA=25*1.4 Amp=35.0 Amp max.

Answer / pillay

the max load you already said as 10 kva and 20 kva. In terms
of kw it will be 10 & 2o kw also, so long it does not exceed
10 & 20 kva ampere ratings.

Answer / ghannesh

hi all please remember in india 1 kva =1.33a then
10 kva = 13 ams use it only 80%load =13*.80=10.4 amp load
25kva*1.33=25 ams ams aprox we use 80% load 33.25*.80=26.6 a maximum load it is safty of trnsfomer

Answer / velu5185

DEPENDS ON SEC. CURRENT

What is the basic difference between directional and non directional over current protection?

1 Answers  

what is Fan Control Cubicle

0 Answers  

why are the transmission lines operated at 220 kv nly... nt les dan dat...

3 Answers  

working method of railway electricl loco in single wire 25000 volt

1 Answers  

What is the starting current of a motor?

3 Answers  

What is principal to reduce earth leakage current with isolation transformer? When isolation transformer is installed in input stage of system, earth leakage current is reduced. the reason is why the leakage current of 2nd stage of isolation transformer does not affect the 1st stage's leakage current. I would like to know the reason. As you know, earth leakage current is a kind of AC. So, How to reduce earth leakage current in case that isolation transformer is used?

2 Answers  

in a simple IDMT relay we use neutral point of ct for earth fault then what is the requirement of neutral ct and cbct?

0 Answers  

what do you mean by lagging and leading current.explain in detail.

1 Answers  

what is the different between counterpoise earthing and pipe earthing?

1 Answers  

What happen to the transformer if the OLTC frequently used for lower and raise occured 50times daily?

0 Answers  

Why Aluminium wires are used for High tension(HT) lines? 11 KVA/32KVA & aboue

6 Answers  

what is droop control?

0 Answers   BARC,