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Power Transmission and Distribution - Siemens

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<strong>Power</strong> <strong>Transmission</strong> <strong>and</strong> <strong>Distribution</strong><br />

Blackout in Italy - very close to the US Event<br />

High Voltage<br />

20 min. after the 1 st Line Trip:<br />

Loss of a 2 nd Line … <strong>and</strong> then a<br />

very fast cascading Sequence<br />

Outage of two inner-Swiss 400 kV Lines<br />

Overload on two 400 kV Lines from<br />

France to Italy <strong>and</strong> Trip of both<br />

Full Blackout in Italy, 9-28-2003,<br />

early in the Morning. Approximately<br />

50 Mill. People have been without<br />

Electricity Supply. Luckily, this<br />

happened on a Sunday.<br />

PTD H 1TM / Re 11-2005 53

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