Find I1, I2
These two configurations have to pull the same power from the 3 phase line(s) but the 1 phase vs 2 phase is not clear and there is probably a 1.73 that's not being accounted for.
I guess it's actually 2 single phase 100kVA transformers, on a 12kV 3 phase system.
Case 1 - 12kV high side connected phase to phase.
Case 2 - 6.9kV high side connected phase to neutral
At full load, what are the primary amps seen by the supply system in each case? If they are different...
consider a 100kVA transformer -
Connected phase to phase on 12kv (2 phases of the 3 phase distribution system) it draws 8.3 Amps (each phase) 100*1000/12000=8.3A
Connected to one phase and neutral at 6.9 kV a 100kVA draws 14.4 amps (1.73 time more) 100*1000/6930=14.4A
In simple terms, why is...
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Spin-up has several problems on AutoTransformers about terminology. Boost/Buck, Step up/down.
I thought I knew, but apparently I don't. Can someone explain how to tell from a connection diagram if an auto transformer is boost/buck? and step up/down?
Thanks
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I bought one, and also just got one with my review course. This is a must have study aid!
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Thanks
I bought one, and also just got one with my review course in the spring of 2012.
This is a legit new copy, unused, cr2011
$35 shipped - save yourself shipping and tax and some coin
Paypal preferred.
email trooper8
at the server
yahoo.com
Thanks