Present-day practise limitations of oil circuit breakers: By the sub-committee on oil circuit breakers and switches of the protective devices committee

IN ORDER to summarize the present-day indefinite operating requirements and limitations of oil circuit breakers, the A. I. E. E. (Protective Devices Committee), N. E. L. A. (Apparatus Committee) and Electric Power Club (Power Switchboard and Oil Circuit Breaker Section) cooperated in sending out a joint questionnaire for oil circuit breaker data to the larger operating companies. The response to this questionnaire was prompt and rather complete, which is an indication of the interest taken by the operating companies.