What are load calculations for a transformer?

[shaibaaz3]

what are load calculations for a transformer?

A 44kv line is distributed into the industry using around 8 transformers 3750kva, 2500kva and 1500kva. What does this mean and what are the load calculations for this? Also how is it distributed?

 

[negitron]

KVA is simply volts times amps. And, it's usually three-phase, so you divide the line-to-line voltage by the square root of 3 to find the line-neutral voltage. So, for example, if you have 44 kV into a 3750 kVA transformer, the maximum current will be 3750 / (44 / SQRT (3)) / 3 = 49.2 amps per phase primary current.

 

[shaibaaz3]

thank u...

 

[m.s.j]

Distribution of load on individual transformers is related to their rated power and impedance voltage. For detail calculation you can refer to Transformer Riddle No. 27 from http://electrical-riddles.com