A movable contact mechanism of a double-breakpoint circuit breaker comprises a front static contact having a first contact point at the rear end, a rear contact assembly having a connecting plate with a rear static contact at the front end, and a movable contact which are placed in the horizontal direction, wherein an insertion slot is formed in the front end of the rear static contact the front contact end of the movable static is equipped with a second contact point matched with the first contact point, and the rear insertion end of the movable contact is inserted into or separated from the insertion slot and the opening or closing stroke of the first contact point and the second contact point is greater than the stroke that the rear insertion end of the movable contact is inserted into or separated from the insertion slot.

A movable contact mechanism of a double-breakpoint circuit breaker comprises a front static contact having a first contact point at the rear end, a rear contact assembly having a connecting plate with a rear static contact at the front end, and a movable contact which are placed in the horizontal direction, wherein an insertion slot is formed in the front end of the rear static contact the front contact end of the movable static is equipped with a second contact point matched with the first contact point, and the rear insertion end of the movable contact is inserted into or separated from the insertion slot and the opening or closing stroke of the first contact point and the second contact point is greater than the stroke that the rear insertion end of the movable contact is inserted into or separated from the insertion slot.

This disclosure describes a hybrid circuit breaker for an industrial automation system. The hybrid circuit breaker may include a mechanical switch and solid-state switches. The hybrid circuit breaker may receive control signals to open and close a current path based on moving a spanner of the mechanical switch. In some cases, moving the spanner of the mechanical switch may generate electrical arcs when the hybrid circuit breaker is conducting electrical current. In such cases, the hybrid circuit breaker may remove the electrical arcs by drawing the electrical arcs to a conductive bar and away from the spanner. Moreover, the hybrid circuit breaker may dissipate the electrical arcs on the conductive bar by opening one or multiple solid-state switches disposed on the conductive bar. In some cases, one or multiple voltage suppressors may receive (e.g., suppress or ground) an electrical power of the electrical arcs when the solid-state switches are opened.

This disclosure describes a hybrid circuit breaker for an industrial automation system. The hybrid circuit breaker may include a mechanical switch and solid-state switches. The hybrid circuit breaker may receive control signals to open and close a current path based on moving a spanner of the mechanical switch. In some cases, moving the spanner of the mechanical switch may generate electrical arcs when the hybrid circuit breaker is conducting electrical current. In such cases, the hybrid circuit breaker may remove the electrical arcs by drawing the electrical arcs to a conductive bar and away from the spanner. Moreover, the hybrid circuit breaker may dissipate the electrical arcs on the conductive bar by opening one or multiple solid-state switches disposed on the conductive bar. In some cases, one or multiple voltage suppressors may receive (e.g., suppress or ground) an electrical power of the electrical arcs when the solid-state switches are opened.

Disclosed are example embodiments of a dead tank circuit breaker for protecting electrical components against electrical surges and other voltage anomalies such as transient overvoltages. The circuit breaker includes: one or more vacuum interrupters; a current bypass circuit electrically coupled to the one or more vacuum interrupters; a dead tank encasing and hermetically sealing the one or more vacuum interrupters and the current bypass circuit, wherein the dead tank is pressurized with a non-SF6 gas; and a controllable mechanism coupled to the one or more vacuum interrupters and to the current bypass circuit. The controllable mechanism is configured to actuate the one or more vacuum interrupters and the current bypass circuit to open or close a main circuit path such that any pre-strike arcing occurs on the current bypass circuit instead of the one or more vacuum interrupters.

Disclosed are example embodiments of a dead tank circuit breaker for protecting electrical components against electrical surges and other voltage anomalies such as transient overvoltages. The circuit breaker includes: one or more vacuum interrupters; a current bypass circuit electrically coupled to the one or more vacuum interrupters; a dead tank encasing and hermetically sealing the one or more vacuum interrupters and the current bypass circuit, wherein the dead tank is pressurized with a non-SF6 gas; and a controllable mechanism coupled to the one or more vacuum interrupters and to the current bypass circuit. The controllable mechanism is configured to actuate the one or more vacuum interrupters and the current bypass circuit to open or close a main circuit path such that any pre-strike arcing occurs on the current bypass circuit instead of the one or more vacuum interrupters.

Disclosed are example embodiments of a dead tank circuit breaker for protecting electrical components against electrical surges and other voltage anomalies such as transient overvoltages. The circuit breaker includes: one or more vacuum interrupters; a current bypass circuit electrically coupled to the one or more vacuum interrupters; a dead tank encasing and hermetically sealing the one or more vacuum interrupters and the current bypass circuit, wherein the dead tank is pressurized with a non-SF6 gas; and a controllable mechanism coupled to the one or more vacuum interrupters and to the current bypass circuit. The controllable mechanism is configured to actuate the one or more vacuum interrupters and the current bypass circuit to open or close a main circuit path such that any pre-strike arcing occurs on the current bypass circuit instead of the one or more vacuum interrupters.

Disclosed are example embodiments of a dead tank circuit breaker for protecting electrical components against electrical surges and other voltage anomalies such as transient overvoltages. The circuit breaker includes: one or more vacuum interrupters; a current bypass circuit electrically coupled to the one or more vacuum interrupters; a dead tank encasing and hermetically sealing the one or more vacuum interrupters and the current bypass circuit, wherein the dead tank is pressurized with a non-SF6 gas; and a controllable mechanism coupled to the one or more vacuum interrupters and to the current bypass circuit. The controllable mechanism is configured to actuate the one or more vacuum interrupters and the current bypass circuit to open or close a main circuit path such that any pre-strike arcing occurs on the current bypass circuit instead of the one or more vacuum interrupters.

A switchgear assembly is provided with an integrated arc flash venting system. The switchgear assembly comprises a circuit breaker section including an arc flash vent stack having blow open flaps disposed on a switchgear roof to exhaust arc flash gases and contaminants away from a front of the circuit breaker section, towards a rear of the circuit breaker section and a top of the circuit breaker section. The circuit breaker section includes a circuit breaker compartment having a back wall with a back vent opening for the passage of all the arc flash gases and contaminants. The circuit breaker section further includes a bus compartment. All of the arc flash gases and contaminants pass through the back vent opening in the circuit breaker compartment and into the bus compartment which forms a single pathway for channeling all of the arc flash gases and contaminants to the arc flash vent stack.

A switchgear assembly is provided with an integrated arc flash venting system. The switchgear assembly comprises a circuit breaker section including an arc flash vent stack having blow open flaps disposed on a switchgear roof to exhaust arc flash gases and contaminants away from a front of the circuit breaker section, towards a rear of the circuit breaker section and a top of the circuit breaker section. The circuit breaker section includes a circuit breaker compartment having a back wall with a back vent opening for the passage of all the arc flash gases and contaminants. The circuit breaker section further includes a bus compartment. All of the arc flash gases and contaminants pass through the back vent opening in the circuit breaker compartment and into the bus compartment which forms a single pathway for channeling all of the arc flash gases and contaminants to the arc flash vent stack.