Effect of deionization time on reclosing circuit breakers

SINCE the initial tests and trial application of high-speed reclosing to high-voltage tie-line circuit breakers a little over 13 years ago by Philip Sporn and D. C. Prince,¹ high-speed reclosing of such circuit breakers has become standard practice on most modern American transmission systems. Today, when capital investment and operating costs are more important than ever before, high-speed reclosing is almost universally recognized by transmission engineers in this country as one of the most economical methods of 1. Increasing the maximum power which can be transmitted over long high-voltage tie lines without loss of synchronism following a short-circuit tripout. 2. Reducing system disturbance and shock at the instant of reclosing by reconnecting the two parts of the system before they have swung too far apart. 3. Reducing line outage time and improving service to customers.