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Short Circuit MVA

Short Circuit MVA

Short Circuit MVA

(OP)
The job I am working on has the following in the specification...

THe main input power has the following characteristics:

(1) Voltage: 2400VAC, 3P, 60Hz, 3W Y reactor Grounded
(2) PF: 0.8 Lagging
(3) Fault Level on 2400V: 25kA, 103.9MVA (RMS Symmetrical)

My question is; Does the MVA make sense?  This looks more like the MVA at 4160??

Not to sure

Regards,
TULUM

RE: Short Circuit MVA

that's your power, (103.9 Mega-Volt-amperes) at 2400V, 25 kilo-amps, 3phase. Seems ok to me, or be more specific, why do you think this makes no sense?
Regards

RE: Short Circuit MVA

(OP)
Sorry,

My big finger on my calculator gave me a different answer that coincidentally workout at the 4160V level not 2400V...

my bad...

Regards,
TULUM

RE: Short Circuit MVA

Is this a 2400/4160 volt system?
If so the fault current may be calculated at 4160, rather than 2400, and the 103.9 MVA looks right.
respectfully

RE: Short Circuit MVA

I guessing you left out the sqrt 3 factor, but seems like you've got it tracked down now.

RE: Short Circuit MVA

(OP)
Yup...

Another OOOPS!  Thanks for the help guys...

Regards,
TULUM

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