Answer / thakur

Simply calculate total KWH and KVH of last 24 Hrs and
Divide into-Total KWH/Total KVH=Avg PF of last 24Hrs

Answer / engr.abdurrahim

Dear Deepak,

Power factor is the cosine factor of the voltage & current
phase difference. Its a short defination. But if you go
deeply, Power factor=cos@,its depend only on load, instead
of phasewise.if you connect same load in every phase it
will show same power factor value in each phase.Because
power factor is depended upon load resistance=R & its
impedance=Z,

cos@ = R/Z,

So if you are going to calcualte the power factor of all
phase, you have to calculate all resistance & impedance of
the load. Then you can calulate the avg. power factor.

R=R1+R2+R3
Z+Z1+Z2+Z3

(Where Z=R+jXL=Impedance)

cos@=R/Z

Hope my answer will satisfy you.

Best Regards,
Engr.Abdurrahim
shaikh337@rediffmail.com

Answer / deepak

thanks, but cosider that R ph pf is 0.8,y-ph pf is 0.6,and
b ph pf is 0.7 what vlb the overall pf of three phase
unbalanced 3phase system .

Answer / razi zainal abidin

Dear all,
This is not an answer, actually question.

In one factory, we are dificult to measure resistance,R and
impedance, Z.

What we have is only voltage supply (3phase, 420volt), and
total current flow during maximum usage using clampmeter
(including machinery, lamp, computers, etc...)

We also have info of main transformer step down because it
is in the factory area. Normally they stated value of KVA.

And some factory already install the 'capasitor bank
regulator'

So, how we can calculate the CORRECT VALUE of capasitor
need to install?

I mean, which one is the correct KW, which one is the
correct KVA, and how to calculate existing power factor IF
the factory already have 'capasitor bank regulator'....can
we switsh of the regulator?

Answer / reddy

By using sequence components ... (+vesequence power - -ve
seq power)/VA

what is the multi strand cable size? 0.45mm is area of one strand & 370nos of strand.

1 Answers  

What will be happend if we not ground CT secondary?

3 Answers   Enercon, Engro, THDC,

132/6.6𝚔𝚟 𝚝𝚛𝚊𝚗𝚜𝚏𝚘𝚛𝚖𝚎𝚛 𝚗𝚎𝚞𝚝𝚛𝚊𝚕 𝚑𝚊𝚜 𝚘𝚗𝚎 𝚎𝚊𝚛𝚝𝚑 𝚙𝚒𝚝 𝚍𝚎𝚍𝚒𝚌𝚊𝚝𝚎𝚍. 𝙸'𝚟𝚎 𝚊𝚗𝚘𝚝𝚑𝚎𝚛 𝚝𝚛𝚊𝚗𝚜𝚏𝚘𝚛𝚖𝚎𝚛 𝚘𝚏 6.6𝚔𝚟/415𝚟 𝚌𝚊𝚗 𝙸 𝚌𝚘𝚗𝚗𝚎𝚌𝚝 𝚗𝚎𝚞𝚝𝚛𝚊𝚕 𝚝𝚘 𝚜𝚊𝚖𝚎 𝚎𝚊𝚛𝚝𝚑 𝚙𝚒𝚝 𝚊𝚜 𝚘𝚏 13/6.𝚔𝚟 𝚝𝚛𝚊𝚗𝚜𝚏𝚘𝚛𝚖𝚎𝚛?? 𝙸𝚏 𝙽𝚘.. 𝚃𝚑𝚎𝚗 𝚠𝚑𝚢??

0 Answers  

IR value for 30kw lt motor

1 Answers   Hofincons,

Hi to all... I Want Weight Details of the alternator for making free power energy.

0 Answers   ME,

why earth fault current is always less than the o/c

2 Answers  

in a refinery one motor is suddenly stoped. what will do how can i findout the problem explain step by step

2 Answers  

when a 500kva-400hz single phase transformer operated on a 100hz supply then what will be kva required

2 Answers  

Draw the equivalent circuit of crystal oscillator?

0 Answers  

What are Directly Exited Generators?

2 Answers  

What is the function of wave trap in an electrical substation?

2 Answers  

How open delta used for protection?

4 Answers