Fault current at 11KV
Fault current at 11KV
(OP)
I am interested to know the typical line to earth fault level on the primary of an 11KV/400/230v D/S Trfmr, the type generally used on the UK public distribution network.
Where the tank earth and the secondary star-point earth connection are bonded the fault voltage appearing between the installations earthed parts connected via the faulted transformer and true earth would equate to the voltage drop across the tank earth electrode.
I know that the earth fault currents are often attenuated by LERs or similar devices located in sub-stations and I wonder what might be the typical magnitude and duration of these fault voltages.
Where the tank earth and the secondary star-point earth connection are bonded the fault voltage appearing between the installations earthed parts connected via the faulted transformer and true earth would equate to the voltage drop across the tank earth electrode.
I know that the earth fault currents are often attenuated by LERs or similar devices located in sub-stations and I wonder what might be the typical magnitude and duration of these fault voltages.
Regards,
Lyledunn






RE: Fault current at 11KV
You need to know these, voltage alone tells us nothing
RE: Fault current at 11KV
RE: Fault current at 11KV
The KVA, %Z and electrode resistances are obvious considerations but I am really only looking for typical values.
Many thanks.
Regards,
Lyledunn
RE: Fault current at 11KV
RE: Fault current at 11KV
Regards
Marmite
RE: Fault current at 11KV
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