Characteristics of Switching Surge Disturbances

Cause Operating Number of Disturbances Not A B Clear Subtotal  

The total number of GISs 11,102, non-GISs 27,456. A control/ protection circuits of the operating CB/DS. B control/protection circuits independent of the operating CB/DS. 0 for unknown and capacitor bank switching. 

Malfunction 15 (7), malfunction (not operated) 3 (2), halt/lock 14 (11), erroneous indication 8 (3), others 6 (1), unknown 1 (1), total 47 (25) cases, () for protection relays 

DS operation permanent failure 7, temporary failure 14 CB operation permanent failure 7, temporary failure 17 

CT secondary VT secondary source circuit CB control circuit 

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