Patent ID: 9147539
Filing Date: 2015-09-29
Classification: H01H

Abstract:
1. A high voltage gas circuit breaker, comprising: a fixed unit including a fixed arc contactor and a fixed contactor; and a movable unit including a movable arc contactor and a movable contactor, and configured to selectively contact or be separated from the fixed unit, wherein the movable unit comprises: a fixed cylinder; a compression cylinder slidably-installed in the fixed cylinder; a movable rod penetratingly-coupled to the compression cylinder, and configured to transmit an adjusting force of an operator; a pressing member installed on an inner bottom part of the compression cylinder; and a compression plate supported by the pressing member, and up-down moving in the compression cylinder by a pressure of an expansion chamber, and wherein an upper protrusion and a lower protrusion are formed on an inner wall of the compression cylinder, such that the expansion chamber has a minimized volume when the compression plate contacts the upper protrusion, and the expansion chamber has a maximized volume when the compression plate contacts the lower protrusion.