Abstract: A three-position disconnector switch includes a platform, a power in contact, a power out contact, an earthing contact, and a piston. In a first position, the piston contacts the power out contact and the power in contact. In a second position, the piston contacts the power out contact. In a third position, the piston contacts the power out contact and the earthing contact. The piston moves along an axis to transition between the different switch positions. The power in contact is mounted to the platform, the power out contact is mounted to the platform, and the earthing contact is mounted to the platform.

Abstract: A medium voltage switchgear busbar disconnector system includes a busbar and a disconnector moveable part; wherein the busbar comprises a contact; wherein in a connected state the disconnector moveable part is configured to be connected to the contact; and wherein in a disconnected state the disconnector moveable part is configured to be disconnected from the contact.

Abstract: A handle for a compartment of a low, medium or high voltage switchgear includes: a body part; a hand grasping part; and a lock. The handle is movable from a closed position to an open position. When the handle is in the closed position, the handle is not useable to open a door of a compartment of the switchgear. When the handle is in the open position, the handle is useable to open the door of the compartment of the switchgear. In the open position, the hand grasping part is positioned so as to be graspable by a human user. In the closed position, a transition of an active element in the compartment of the switchgear from a quiescent state to an active or potentially active state activates the lock. Activation of the lock stops the handle from moving from the closed position to the open position.

Abstract: A three-position disconnector switch includes an earthing contact, a power out contact, a power in contact, and a piston. The power out contact comprises first and second parts connected by a leg portion. In a first position, the piston contacts the first part of the power out contact. In a second position, the piston contacts the first part of the power out contact and makes electrical contact with the second part. In a third position, the piston contacts the second part and makes electrical contact with the earthing contact. The piston is configured to move along an axis of the three-position disconnector switch to transition the three-position disconnector switch between the different switch positions.

Abstract: A bushing for a metal clad medium voltage switchgear includes a hollow body. The body is made of polyamide. A first end of the body connects to a compartment of the medium voltage switchgear. A second end of the body connects to a T-off and pin. A body portion extends from the first end of the body to the second end of the body. The body portion is circular shaped about an axis extending from the first end of the body to the second end of the body.

Abstract: A switchgear or control gear includes: at least one first compartment; at least one second compartment; a plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and at least a first part of an insulated cable connection; and a plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control gear components are housed in the at least one second compartment. When one or more of the plurality of main switchgear or control gear components is energized, the at least one first compartment is hermetically sealable or maintainable at an internal air pressure greater than ambient air pressure.

Abstract: A switch includes a power in contact, a piston, a power out contact, a plurality of flexible locking elements, an earthing contact, and a threaded rod. In a first position, the piston contacts the power in contact and the power out contact. In a second position, the piston contacts the power out contact. In a third position, the piston contacts the earthing contact and the power out contact. The piston comprises an inner threaded section that engages the threaded rod. Rotation of the threaded rod moves the piston along an axis of the switch between the different switch positions. The piston comprises a groove extending in a direction parallel to the axis. Each of the flexible locking elements is configured such that a part of each of the flexible locking elements moves into and out of the groove as the piston is moved along the axis of the switch.

Abstract: A switchgear or control gear includes: a first compartment; at least one removable module; a plurality of main switchgear or control gear components; and a plurality of auxiliary switchgear or control gear components. The plurality of main switchgear or control gear components are sub-divided into a first group of components that have a lifetime greater than a threshold level and a second group of components that have a lifetime less than or equal to the threshold level. The plurality of auxiliary switchgear or control gear components are sub-divided into a first group of components that have a lifetime greater than the threshold level and a second group of components that have a lifetime less than or equal to the threshold level.

Abstract: A switchgear or control gear includes: at least one first compartment; a second compartment; a plurality of main switchgear or control gear components, the plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and a cable connection; and a plurality of auxiliary switchgear or control gear components, the plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control components are housed in the second compartment. The circuit breaker and three position or rotational movement disconnector are mounted vertically in the at least one first compartment.

Abstract: A circuit breaker pole for low voltage or medium voltage operation includes: a main body section; a first end section; and a second end section. The first end section is fixedly connectable to a wall of an enclosure. The second end section is fixedly connectable to the wall of the enclosure.

Abstract: A three phase switchgear or control gear includes: at least one compartment; a plurality of components for a first phase; a plurality of components for a second phase; and a plurality of components for a third phase. The plurality of components for the first phase, the plurality of components for the second phase, and the plurality of components for the third phase each include a main busbar, a three position linear or rotational movement disconnector switch, a single phase circuit breaker pole, and a cable connection. The plurality of components for the first phase, the plurality of components for the second phase, and the plurality of components for the third phase are housed in the at least one compartment.

Abstract: A medium voltage switchgear or control gear includes at least one first compartment; a cable compartment; a plurality of main components; and a plurality of auxiliary components. The plurality of main components is housed in at least one part of the at least one first compartment. The plurality of auxiliary components is housed in the cable compartment. The second connector is configured to connect to the first connector to connect a cable in the cable compartment to a component of the plurality of main components. The cable compartment is configured to be disconnected from the at least one first compartment and wherein the cable compartment is configured to be spatially separated from the at least one first compartment.

Abstract: A three-position disconnector switch includes a platform, a power in contact, a power out contact, an earthing contact, and a piston. In a first position, the piston contacts the power out contact and the power in contact. In a second position, the piston contacts the power out contact. In a third position, the piston contacts the power out contact and the earthing contact. The piston moves along an axis to transition between the different switch positions. The power in contact is mounted to the platform, the power out contact is mounted to the platform, and the earthing contact is mounted to the platform.

Abstract: A switch includes a power in contact, a piston, a power out contact, a plurality of flexible locking elements, an earthing contact, and a threaded rod. In a first position, the piston contacts the power in contact and the power out contact. In a second position, the piston contacts the power out contact. In a third position, the piston contacts the earthing contact and the power out contact. The piston comprises an inner threaded section that engages the threaded rod. Rotation of the threaded rod moves the piston along an axis of the switch between the different switch positions. The piston comprises a groove extending in a direction parallel to the axis. Each of the flexible locking elements is configured such that a part of each of the flexible locking elements moves into and out of the groove as the piston is moved along the axis of the switch.

Abstract: A three-position disconnector switch includes an earthing contact, a power out contact, a power in contact, and a piston. The power out contact comprises first and second parts connected by a leg portion. In a first position, the piston contacts the first part of the power out contact. In a second position, the piston contacts the first part of the power out contact and makes electrical contact with the second part. In a third position, the piston contacts the second part and makes electrical contact with the earthing contact. The piston is configured to move along an axis of the three-position disconnector switch to transition the three-position disconnector switch between the different switch positions.

Abstract: A three-position disconnector switch includes an earthing contact, a power out contact, a power in contact, a piston, and a threaded rod. A length of the piston is such that in a first switch position an outer surface of a wall of the piston makes an electrical contact between the power out contact and the power in contact. The length of the piston is such that in a second switch position the outer surface of the wall of the piston does not make an electrical contact with either the earthing contact or the power in contact. The length of the piston is such that in a third switch position the outer surface of wall of the piston makes an electrical contact between the earthing contact and the power out contact. The piston includes an inner threaded section configured to engage with the threaded rod.

Abstract: An interlock system for a low, medium or high voltage switchgear includes: a compartment; a door; a door handle; and a circuit breaker. The door permits access to an inside of the compartment. The door handle opens and closes the door. The circuit breaker is located in the compartment. The door handle is movable from a closed position to an open position. When the door handle is in the closed position, the door does not to open, and when the door handle is in the open position, the door opens. A movement of the door handle from the closed position to the open position places the circuit breaker in a locked configuration.

Abstract: A handle for a compartment of a low, medium or high voltage switchgear includes: a body part; a hand grasping part; and a lock. The handle is movable from a closed position to an open position. When the handle is in the closed position, the handle is not useable to open a door of a compartment of the switchgear. When the handle is in the open position, the handle is useable to open the door of the compartment of the switchgear. In the open position, the hand grasping part is positioned so as to be graspable by a human user. In the closed position, a transition of an active element in the compartment of the switchgear from a quiescent state to an active or potentially active state activates the lock. Activation of the lock stops the handle from moving from the closed position to the open position.

Abstract: A switchgear or control gear includes: at least one first compartment; at least one second compartment; a plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and at least a first part of an insulated cable connection; and a plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control gear components are housed in the at least one second compartment. When one or more of the plurality of main switchgear or control gear components is energized, the at least one first compartment is hermetically sealable or maintainable at an internal air pressure greater than ambient air pressure.

Abstract: A three phase switchgear or control gear includes: at least one compartment; a plurality of components for a first phase; a plurality of components for a second phase; and a plurality of components for a third phase. The plurality of components for the first phase, the plurality of components for the second phase, and the plurality of components for the third phase each include a main busbar, a three position linear or rotational movement disconnector switch, a single phase circuit breaker pole, and a cable connection. The plurality of components for the first phase, the plurality of components for the second phase, and the plurality of components for the third phase are housed in the at least one compartment.