Answer / chetan & panks

Please mention voltage level & PF.

Assuming the voltage level 415V & PF 0.85,

FLC=kw/(ROOT3xkVxcoso)
= 30/(1.74x0.415x0.85)
= 48.87A

Answer / pintoo

the data u have given is not sufficient to calculate the
FLC.
the exact formula to calculate FLC is:
P=sqrt(3)*V*I*cos(phi)*efficiency

I=P/[sqrt(3)*V*cos(phi)*eff.]

P=30KW=30000Watt
V=415V
cos(phi)=?
eff.=?

put the value of cos(phi) and efficiency then u will get
accurate FLC.

Answer / abhishek uppal

1H.P= 0.746 watts i.e power
so in 3 phase ,power =root3 *v*flc(Il)*cos phi
power =.746 watts
v=415v, and cos phi=0.8...so substituting above values
0.746=1.732*flc*415*0.8
so 7460/1.732*415*0.8= 1.31 A
So flc=1.31A...so accordingly,
find for 30 kw.

Answer / x man

i will tellu a simple method,

hpx1.4 ..its an industrial method

Answer / rajkumar r

U CAN FIND FLC OF THE MOTOR IN THE MOTOR NAME PLATE ITSELF.
MOREOVER,
1HP=0.746KW
1KW=1/0.746HP
30KW=30/0.746 HP=40HP

Practically current taken by 1HP motor=1.342A
so full load current of 30kw(40HP) motor=40*1.342=54A

Answer / adnan

FLC : Can be Measured By their name Plate
Engr.adnan

what is the calculation of current when a clampmeter is attached to two phases of any drives.

3 Answers   ABB,

What can be a rating of a transformer(KVA) if the load is about 1000KW?illustrate by showing formula?

2 Answers  

how meger function

0 Answers  

One amps in HT is equal to how manys amps in LT

5 Answers  

explain PV modules in solar energy generation.

0 Answers  

an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 Answers  

In 3.5X150 Sq.mm cable what does 150 stand for outer dia or inner dia?

4 Answers  

how to calculate P.F from kva only?

3 Answers  

Where is the best place to mount  distribution panel in a house.

0 Answers   Wantro Technical Services,

I have motor of 3 H.P. How i found the rating of capacitor use in it in single phase motor..???

0 Answers  

how do prepare ongc exam.how is it question model.i am electrical. which part covering in electrical.tell me

0 Answers   ME,

why make protection 85% of winding?

1 Answers