Circuit breaker

Abstract

This invention relates to a circuit breaker device, comprising a housing, a circuit breaker, and a working gas. The housing includes a chamber, a fixed-side conductor, and a movable-side conductor; the circuit breaker is disposed in the chamber and connects the fixed-side conductor and the movable-side conductor; the working gas fills the chamber and the circuit breaker, and the working gas includes a mixture of insulating gas and carrier gas. This allows the circuit breaker device to achieve increased operating speed, higher internal gas pressure, and better insulation performance.

Claims

1. A circuit breaker comprising: a housing including at least one chamber, at least one fixed-side conductor and at least one movable-side conductor, the chamber being disposed inside the housing, and the fixed-side conductor and the movable-side conductor being disposed outside the housing and extending into the chamber; A circuit breaker, disposed in the chamber and connecting the fixed-side conductor and the movable-side conductor, wherein the circuit breaker includes at least a cylinder, a fixed-side arc-extinguishing contact, a nozzle, an arc-blowing pump, a movable-side arc-extinguishing contact, an operating lever, an exhaust port, and a shield. The fixed-side arc-extinguishing contact is disposed at one end of the cylinder, the nozzle is disposed on the cylinder and corresponds to the fixed-side arc-extinguishing contact, the arc-blowing pump is disposed on the cylinder and connected to the nozzle, the movable-side arc-extinguishing contact is disposed on the cylinder and connected to the arc-blowing pump, the operating lever is disposed on the cylinder and connected to the arc-blowing pump, the exhaust port and the shield are disposed at one end of the cylinder, and the shield is adjacent to the exhaust port; and a working gas, which fills the chamber and the circuit breaker, the working gas including at least a mixture of insulating gas and carrier gas.

2. The circuit breaker as described in claim 1, wherein the housing is an airtight housing.

3. The circuit breaker as claimed in claim 1, wherein the fixed-side conductor is a chimney-type conductor and the fixed-side conductor is connected to one end of the circuit breaker.

4. The circuit breaker as described in claim 1, wherein the shield is arc-shaped.

5. The circuit breaker device as claimed in claim 1, wherein the nozzle has a first opening, a second opening and a channel, the first opening is located at one end of the nozzle, the second opening is located at the other end of the nozzle, the channel connects the first opening and the second opening, and the first opening is smaller than the second opening, and the channel gradually narrows towards the second opening.

6. The circuit breaking device as claimed in claim 1, wherein the insulating gas is perfluoroisobutyronitrile (C4-FN) of 1 to 20 mole percent (mol%).

7. The circuit breaker as claimed in claim 1, wherein the carrier gas is carbon dioxide or nitrogen at a concentration of 50 moles to 98 moles.

8. The circuit breaker as claimed in claim 1, wherein the working gas further comprises a restoring agent, the restoring agent being oxygen at a concentration of 1 mole percent (mol%) to 30 mole percent (mol%).

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