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7 Cards in this Set
- Front
- Back
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What are the four protected zones in a substance? |
-Line Fault, Overcurrent -Transformer Overcurrent -Bus Diff -Feeder Over current |
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What are your zone of protections Ansi # |
50 Line fault Overcurrent 51 Transformer Overcurrent 87 Transformer Differentials 63 Sudden Pressure 87 Bus Differential 50/51 Feeder Overcurrent |
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Line fault/Overcurrent zone |
High side of Transformer to other side of line. |
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Transformer Overcurrent Zone |
Low side of Transformer to distribution, excluding BT |
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XFMR Differential/Sudden pressure |
Transformer HS LS |
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Bus differential zone |
LS XFMR To distribution side of BKR, includes BT |
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Feeder Overcurrent Zone |
Trans side of BKR to Distribution |
