Answer / sripellirajukumar

hi this is rajkumar...
as per my knowledge
the primary side current can be calculate as follows
for example
we have power transformer of 5MW transformer and the 33\11kv
the primary current is (5000kv/33kv)/1.732=87.47amps
the secondary current is (5000kv/11kv)/1.732=262.43amps
here 1.732 is square root of 3....

Answer / cfanez

Girish,since the power is in MW,it means that we are looking
for current in consideration of power factor.If it were in
MVA,then the calculation given by Rajkumar is ideal.
5000kW=1.732*11*Ip*PF (assume pf =0.85)
5000=1.732*11*Ip*0.85
primary current Ip=308.7A
5000=1.732*.415*Is*0.85
Secondary currentIs=8,183.6A
Select cable capable from your table.If surface then
alluminum cable should be selected,if underground,suitable
hV cable should be selected to suit the primary and
secondary current carrying capacities respectively.

Answer / tasawar abbas

power factor panel calculation?
why I use the PFI panel in industry?
whose I select the kvar rating?

Answer / j.kesavan

check tr current in name plate py side after slect h.t
(xlpe)cable fix .

Answer / hosam

33000KV/11000KV 20MVA = 20000KVAX0.8=16000KW

1000kva H.V=52.5
L.V=1333.4
433V

Answer / perumalsamy o

5mva
I = 5000/33*1.732
I = 57.5A (HT amps 33 kv side)
 I = 5000/11*1.732
   =262.5A(HT amps 11kv side)

How can we convert the motor to generator and also generator to motor

2 Answers   Aesco,

What is SFU ?

4 Answers  

Explain the purpose of inductor in an electric circuit?

0 Answers  

what is LUX?

4 Answers   NTPC,

why electric shock due to dc is dangerous than that of ac

44 Answers  

What is an Air COmpressor

0 Answers   DLF,

Dear all, kindly give me the details of leectrical design engineer course details/institute in hyderabad /any where in india.

1 Answers   Reliance,

what is the working principle of smoke detector in fire alarm system

2 Answers   Vijaya Bank,

why transmission line 11Kv OR 33KV,66Kv not in 10kv 20kv?

43 Answers   A2Z Group, Baiji Power Plant Gas, Electrical, HCL, Kirloskar, Mepco, NEPC, OAMC, UNI, University of Lahore,

wts d diff b/w C.T. & P.T.?

9 Answers  

in three phase 11kv transformer (11kv/433v) input( R,Y,B) output (X,Y,Z,N) the connection as follows 1 phase R -open 2phase y connected to both R and y of input] 3phase B- B what is the output voltage X to N ,Y to N , Z to N

2 Answers   Bescom,

what is the purpose of taking HV test in LT panel.

1 Answers   PCE,