The invention disclosed is an arc protection system for an electrical switch mounted in an electrical cabinet. The system includes an arc suppression housing pivotally mounted in the electrical cabinet. The housing comprises an arc extinguishing chamber having an opening configured to face separable contacts of an electrical switch mounted in the cabinet when the housing has been rotated about the pivot into a closed position. The arc extinguishing chamber is configured to extinguish an electric arc produced by opening the separable contacts when the housing is in the closed position. The system further includes an interference mechanism mounted on the arc suppression housing. The interference mechanism is configured to prevent closure of an access door of the electrical cabinet, when the housing has been rotated about the pivot into an open position configured to enable operator access to the separable contacts of the electrical switch.

The present disclosure relates an interlock device for preventing insertion or withdrawal of a circuit breaker into or from a switch board having an ON button and an OFF button and including a switch board body provided with a housing and a rail having an interruption hole formed on one side surface thereof, a carriage movable back and forth along the rail of the switch board body, and the circuit breaker including a main body installed on the carriage and inserted into or withdrawn from the switch board body, the interlock device comprising an interlock rod protruding toward one side to set or release a pressed state, wherein the interlock rod is set in or released from the pressed state and inserted into or disengaged from the interruption hole when the main body is put in or tripped.

The present disclosure relates an interlock device for preventing insertion or withdrawal of a circuit breaker into or from a switch board having an ON button and an OFF button and including a switch board body provided with a housing and a rail having an interruption hole formed on one side surface thereof, a carriage movable back and forth along the rail of the switch board body, and the circuit breaker including a main body installed on the carriage and inserted into or withdrawn from the switch board body, the interlock device comprising an interlock rod protruding toward one side to set or release a pressed state, wherein the interlock rod is set in or released from the pressed state and inserted into or disengaged from the interruption hole when the main body is put in or tripped.

An assembly for engaging an electromagnetic actuator comprising a first shaft having a first link and a second shaft having a second link connected by a biasing assembly configured to rotate between an initial and a final position. A contact arm of the second shaft advances a sliding armature of the electromagnetic actuator from an activated state to a deactivated state such that the assembly prevents the electromagnetic actuator from returning to the activated state. The biasing assembly has a toggle-over position in which a biasing force rotates the contact arm from the toggle-over position to the final position.

The present disclosure relates an interlock device for preventing insertion or withdrawal of a circuit breaker into or from a switch board having an ON button and an OFF button and including a switch board body provided with a housing and a rail having an interruption hole formed on one side surface thereof, a carriage movable back and forth along the rail of the switch board body, and the circuit breaker including a main body installed on the carriage and inserted into or withdrawn from the switch board body, the interlock device comprising an interlock rod protruding toward one side to set or release a pressed state, wherein the interlock rod is set in or released from the pressed state and inserted into or disengaged from the interruption hole when the main body is put in or tripped.

The invention relates to an electric switching device (1), comprising at least one switching-device pole filled with insulating gas and a monitoring apparatus (14). The monitoring apparatus (14) comprises a density monitor (15) and a housing part (16), wherein a gas chamber (17) is contained in the housing part (16), which gas chamber is connected to the switching-device pole and to the density monitor (15) and can be connected to a testing device for the density monitor (15), and wherein the housing part (16) contains a shut-off element (20), which can be actuated into an open position and into a closed position. The actuation of the shut-off element (20) is independent of the connection of the gas chamber (17) to the testing device.

A plug interlock apparatus for a vacuum circuit breaker, comprising: a control power plug having a plug fixing member formed on each side thereof; a switchboard including a plurality of terminals; a control power connector from which the control power plug is detached; a plug latch formed on the sides of the control power connector and fixing the plug fixing members; a circuit breaker body which includes a connector rotation link which rotates in association with the plug latch, and a slide link having one end coupled to the connector rotation link, and which is detached from the terminal and supplied with voltage and current; and a transfer cart for reciprocating the circuit breaker body along a rail installed on the bottom surface of the switchboard, wherein a locking latch detached from a rail groove formed on the rail is formed at the other end of the slide link.

A plug interlock apparatus for a vacuum circuit breaker, comprising: a control power plug having a plug fixing member formed on each side thereof; a switchboard including a plurality of terminals; a control power connector from which the control power plug is detached; a plug latch formed on the sides of the control power connector and fixing the plug fixing members; a circuit breaker body which includes a connector rotation link which rotates in association with the plug latch, and a slide link having one end coupled to the connector rotation link, and which is detached from the terminal and supplied with voltage and current; and a transfer cart for reciprocating the circuit breaker body along a rail installed on the bottom surface of the switchboard, wherein a locking latch detached from a rail groove formed on the rail is formed at the other end of the slide link.

A switchgear apparatus configured for operation at voltages up to 72.5 kV includes a vacuum interrupter assembly having a fixed contact and a movable contact configured to move relative to the fixed contact between a closed position in which the movable contact is in contact with the fixed contact and an open position in which the movable contact is spaced from the fixed contact. The switchgear apparatus also includes an electromagnetic actuator configured to move the movable contact between the open position and the closed position, a manual trip assembly movable from an initial position to an actuated position to move the movable contact from the closed position to the open position, and a mechanical interlock assembly configured to prevent the movable contact from moving from the open position to the closed position when the manual trip assembly is in the actuated position.

A switchgear apparatus configured for operation at voltages up to 72.5 kV includes a vacuum interrupter assembly having a fixed contact and a movable contact configured to move relative to the fixed contact between a closed position in which the movable contact is in contact with the fixed contact and an open position in which the movable contact is spaced from the fixed contact. The switchgear apparatus also includes an electromagnetic actuator configured to move the movable contact between the open position and the closed position, a manual trip assembly movable from an initial position to an actuated position to move the movable contact from the closed position to the open position, and a mechanical interlock assembly configured to prevent the movable contact from moving from the open position to the closed position when the manual trip assembly is in the actuated position.