Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
(OP)
What would be the effects and measures that would need to be taken if a transformer is replaced with one having lower impedance (6.22 % with 6 %)?






RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
Shouldn't be much difference to go from 6.22 to 6. Probably, just need to check relay coordination and available fault current, which probably has changed since the relaying Was last set.
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
At 6% impedance your available fault current will be 60140 Amps.
The change in regulation may not be proportional to the change in impedance.
Bill
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"Why not the best?"
Jimmy Carter
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)
RE: Effects of replacing an existing Dist. Transformer with one having lower % impedance (6.22 with 6.0)