JPH0466741U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the main part of an embodiment of the present invention, Fig. 2 is a top view showing the end face of the pressure accumulator of the same embodiment, and Fig. 3 is a main part of another embodiment of the invention. 4 is a top view of FIG. 3, FIGS. 5 and 6 are longitudinal sectional views showing main parts of still other different embodiments of the present invention, and FIG. 7 is a top view of FIG. FIG. 2 is a vertical cross-sectional view showing the main parts of a conventional gas circuit breaker. 1...Fixed side main circuit conductor, 3...Support conductor, 5
... Fixed main contact, 6 ... Fixed arc contact, 7 ... Movable main contact, 9 ... Movable arc contact, 10 ... Insulation nozzle, 12 ... Puff cylinder, 14 ... Piston, 17 ... Pressure accumulation chamber, 16 ... Lid part, 18 ... Small hole, 21 ... First small hole, 22 ... Second small hole, 24 ... Communication hole, 25 ... Check valve.

Claims (1)

[Claims for Utility Model Registration] (1) A hollow fixed arc contact supported by a hollow supporting conductor, a movable arc contact, and a powder that sprays gas on the arc generated when the movable arc contact is separated from the fixed arc contact. The mechanism is placed in a gas space filled with arc-extinguishing gas, and the space within the fixed arc contact and the space within the supporting conductor form a pressure accumulation chamber having an opening on the side of the movable arc contact. In the circuit breaker, a small hole is provided that communicates the pressure accumulation chamber with the gas space at an end opposite to the opening, the small hole allows gas to flow in a steady state,
A gas circuit breaker characterized in that the gas circuit breaker is set to a size that substantially causes a closed state when the pressure in the pressure accumulation chamber increases when an arc occurs. (2) A hollow fixed arc contact supported by a hollow supporting conductor, a movable arc contact, and a puffer mechanism that sprays gas on the arc generated when the movable arc contact is separated from the fixed arc contact with arc-extinguishing gas. In a gas circuit breaker, the gas circuit breaker is disposed in a filled gas space, and the space within the fixed arc contact and the space within the supporting conductor form a pressure accumulator having an opening on the movable arc contact side. A communication hole communicating with the gas space is provided at the end opposite to the opening, allowing gas to flow through the communication hole during normal operation, and allowing gas to flow through the communication hole when the pressure inside the pressure accumulator increases when an arc occurs. A gas circuit breaker characterized by being provided with a check valve that closes the gas circuit breaker. (3) A hollow fixed arc contact supported by a hollow support conductor, a movable arc contact, and a puffer mechanism that sprays gas on the arc generated when the movable arc contact is separated from the fixed arc contact with an arc-extinguishing gas. In a gas circuit breaker, which is disposed in a gas space filled with gas and is formed by a space within the fixed arc contact and a space within the supporting conductor to form a pressure accumulator chamber having an opening on the side of the movable arc contact. An auxiliary chamber separated from the pressure accumulation chamber by a partition is provided at an end opposite to the opening, a first small hole is provided in the partition to communicate the pressure accumulation chamber and the auxiliary chamber, and the auxiliary chamber is separated from the pressure accumulation chamber by a partition. A gas circuit breaker characterized in that a wall of the chamber is provided with a second small hole that communicates the auxiliary chamber with the gas space.