How to calculate the average power factor in 3 phase
unbalanced system
Answer Posted / 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?
| Is This Answer Correct ? | 5 Yes | 4 No |
Post New Answer View All Answers
formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?
Define the term factor of inertia.
State thevenin’s theorem?
what is a vector protection in transformer
why core is useful for a transformer ?and also in its operation ?
Explain the process of commutation in a dc machine.
How to define Kirchhoff current law and voltage law along with simply examples.
what is earth-fault?when it occurs? to check where it occurs what type of test should we do?
sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.
how 650 volts creates? where is use?
what is the main function of capacitors in mccs.
I want to know Electrical Circuit?
in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.
HOW CAN WE DECIDE THE SUPPLY VOLTAGE FOR MOTOR ACCORDING TO ITS RATING(IF ANYONE KNOWS GIVE IT WITH EXAMPLE AND ITS CALCULATIONS)
I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id:upendrakrishna20@gmail.com,plz send me ,or send any other rrb papers plzzzzzzzzzzzzzzzzzz