FIELD: power industry.
SUBSTANCE: system of a switching unit has insulating nozzle (7) enveloping at least partially contact clearance (2). Nozzle passage (8) of insulating nozzle (7) enters with its outlet hole (13) the gas heating volume (10). Inside gas heating volume (10) there located is deflector element (15a, 15b, 15c) that restricts deflector passage (14a, 14b, 14c) having section (16) that is restricted with lateral surface having a shape of flattened cone. Section (16) of the deflector passage has a cross section diverging in the switching gas outlet direction to gas heating volume (10) and forms a transition between a cylindrical lateral surface and a converged section.
EFFECT: possibility of effective filling and emptying of a gas heating volume with switching gas at short time intervals.
15 cl, 3 dwg
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