Transformer and watt or VA relation?

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SUMMARY

The discussion centers on the relationship between transformer capacity measured in KVA and the load capacity in watts, specifically regarding a 15 KVA step-down transformer supplying 220 volts for air conditioners. It is established that while a 15 KVA transformer can theoretically support 10 air conditioners rated at 1500 watts each, the actual load must consider the power factor (PF). The formula Str (apparent power) must be greater than Pl (real power) divided by PF, indicating that the transformer may not support additional loads without exceeding its capacity.

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neduet
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Hi friends
it is not ( problem or numerical) just i want know


friends if i have 15kva transformer .
then can i say it can carry 1500 watt 10 (split AIR conditioners) as a load.
and what happened if i add 5 more (split AIR conditioners) in same case. just give me idea please.theoreticallyAdditional Details
15kva transformer is step-down give 220 volt r.m.s output and
AIR conditioners (a.c)(with common power factor) also can operate on 220 volt or 1500 watt each.
 
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No! Because:

Str should be greater than Pl/PF

However:
Str = 15 KVA
Pl = 10 X 1.5 = 15 KW
PF <1

-----------------------------------------------------------------
Creative thinking is enjoyable, Then think about your surrounding things and other thought products. http://electrical-riddles.com
 
m.s.j said:
No! Because:

Str should be greater than Pl/PF

However:
Str = 15 KVA
Pl = 10 X 1.5 = 15 KW
PF <1






-----------------------------------------------------------------
Creative thinking is enjoyable, Then think about your surrounding things and other thought products. http://electrical-riddles.com


Sir please explain more for me. if you can...
i can't understand this.

thanks a lot
 
sorry! I can not.
 
I would say you can because the odds of all 10 being on at the same time are low. That's called "diversity".

M.S.J.'s point, though, was that the difference between kva and kw is power factor. Because of power factor, a reactive load draws a higher kva than kw.
 

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