IEEE Power & Energy Magazine - May/June 2018 - 88
figure 1. A collection of oil and air circuit breakers, vintage 1900. (Image courtesy of the authors.)
figure 2. A 40-kV breaker installed in 1901. (From R. Wilkins and E.A. Crellin,
High Voltage Oil Circuit Breakers. New York: McGraw Hill, 1930.)
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figure 3. An OCB from 1908 to 1958.
(Used by permission of the authors.)