Interested to Buy Any Domain ? << Click Here >> for more details...
For a certain load i need 100kw load ,In that case what
rating mccb should i use?
- 5 Answers
- 13295 Views
- I also Faced
- E-Mail Answers
Answer Posted / chintan patel
It can be different for DC , 1phase AC , 3 phase AC , systems,
Lets calculate for all ,
1 ) For DC ( you have not mentioned Voltage but considering 230 V )
100 kw means 100000 watt
formula for DC power p= vi
100000= 230xi
i=100000/230= 434 amp
we always use current rating of the mccb is 1.5 times of full load current so we can use 434x1.5= 652 amp.
( if system is not running on full load select 630 Amp MCCB, if its on full load select 800A )
2 ) For 1phase AC,
Power: P = V I cos phi ( cos phi is power factor is not known assume 0.8 )
100000 W = 230 x I x 0.8
I = 543 Amp
we always use current rating of the mccb is 1.5 times of
full load current.
mccb required 543 Amp X 1.5 = 815 Amp
select 800 Amp MCCB
3)
If load is 3 phase AC ,
Power P = sqrt(3) x V x I x cos phi
100000 w = 1.73 x 415 x I x 0.8
I = 174
we always use current rating of the mccb is 1.5 times of
full load current.
mccb required 174 Amp X 1.5 = 261 Amp
( if system is not running on full load select 250 Amp MCCB,
if its on full load select 315 A )
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
what is per unit calculation?looking for simple and strong explanation thk u
i am going to attaned the engineer (disign)iterview at HAL please give me duid line
how ups works ? various parts of ups and working principle
What is non-minimum phase transfer function?
Why strting torqe high in inducation motor?
how to determine motor size for a fan application?
Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?
Is there chopping current in resistive circuit
Why Utility Distribution System in India is mainly at 11 kV? Why not Utility go for 33 kV?
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
what is the transformer rush current?
For a spring controlled governer the relation F = ar+b (F is the controlling force, r is the radius of rotation a and b are constants), indicates that the governer is
For electrical designers what are the standard should know? i want learn about this standards. how to get information/reference. anybody help in this regards please.
distribution transformer de-rating formula on over limit iron losses
What is warm / cold start of HT motors. How many warm start & cold start are possible in a day?
