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3ø trans, 3ø faults
1ø trans, 1ø L-L faults
1ø trans, 1ø L-N faults
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Step 1 - 3ø trans
Step 1 - 1ø trans
Step 2 - Trans Multiplier
Step 3 - Let-thru Current
Step 4 - 3ø Fault Factor
Step 4 - 1ø L-L Fault Factor
Step 4 - 1ø L-N Fault Factor
Step 5 - Multiplier
Step 6 - Sym. RMS
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Step 1 - 3ø trans
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Determine the Transformer Full-load Amperes
or
Courtesy of Cooper Bussmann
1
KILOVOLT AMPERES
KVA
2
VOLTS
E
L~L
Proof steps
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See also
Calculations
Determine the Transformer Full-load Amperes
Determine the Available Short-circuit symmetrical RMS current at the fault point
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