34.5 kV/ 13.8 kV transformer nameplate?
34.5 kV/ 13.8 kV transformer nameplate?
(OP)
Please help me find the nameplate ratings of a 34.5kV/13.8kV tranformer or at least its percent impedance for our substation design. tnx
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34.5 kV/ 13.8 kV transformer nameplate?
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RE: 34.5 kV/ 13.8 kV transformer nameplate?
RE: 34.5 kV/ 13.8 kV transformer nameplate?
RE: 34.5 kV/ 13.8 kV transformer nameplate?
RE: 34.5 kV/ 13.8 kV transformer nameplate?
Nameplate %Z=6.3
RE: 34.5 kV/ 13.8 kV transformer nameplate?
It looks like an ANSI transformer. Then ANSI C57.12.10 is the reference for manufacturing.
Per C57.12.10 the BIL for 34.5 kV is 200 kV. That means based on 200 kV BIL, then
Z=7.5% with a LTC
Z=7.0% without LTC.
This is the guranteed impedance. The nameplate impedance cannot change very much from this value unless it is a custom built one to satisfy any high impedance requirements. Anyhow, in your SC calculations you have to use (-)7.5% tolerence for the impedance per ANSI.
RE: 34.5 kV/ 13.8 kV transformer nameplate?
Please note I'm in the UK so I need IEC string in cm, not ANSI string in inches.
Regards
Marmite