The Z (impedance) for Transformers
The Z (impedance) for Transformers
(OP)
Hi,
Is there a table or common values for Z, used in short circuit calcs for typical dry type standard transformers. Example 15 KVA, 25, ... up to 125 KVA. 480v primary to 220v/110v secondary. Or, does it have to come from the power co. or manufacturer?
Regards,
Is there a table or common values for Z, used in short circuit calcs for typical dry type standard transformers. Example 15 KVA, 25, ... up to 125 KVA. 480v primary to 220v/110v secondary. Or, does it have to come from the power co. or manufacturer?
Regards,






RE: The Z (impedance) for Transformers
More defined ANSI/IEEE stadards (for North America) exist for transformer rated 500kVA and greater. For smaller units, I am not aware of any standards ( that does not mean they do not exist), but the Z of smaller transformer varies greatly between manufacturers and type.
Typically Z of smaller transformer you describe range anywhere between 1.5% to 3%.
RE: The Z (impedance) for Transformers
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RE: The Z (impedance) for Transformers
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RE: The Z (impedance) for Transformers