Abstract
In the electric power industry, much effort has been expended in the development of oilless circuit breakers, particularly for use in extra high voltage (EHV) systems. This paper describes a new line of HV and EHV air blast circuit breakers having a 2-cycle interrupting time rating, and an operating pressure of 370 psi. The breakers utilize separate power interrupting and circuit isolation modules to permit maximum flexibility in building breakers with a variety of interrupting ratings at various voltage levels, from the HV classes up to 550 and 765 kV and above.
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