Provided is an earthing structure of an earthing truck that includes a frame with a terminal connection part and a moving part configured to support the frame and is configured to ground a bus or a cable while the moving part moves. The structure including: an earthing plate provided on a lower surface of the moving part; and an earthing member configured to provide a contact pressure to the earthing plate as it contacts the earthing plate when the moving part moves.

An operating modes selector is for an earthing switch that includes power contacts and a motor for moving the power contacts. The selector includes a plurality of positions corresponding respectively to various operating modes of the earthing switch, and includes cams whose positions are defined by the selector position. The selector contains a first cam which pulls a first locking organ designed to mechanically block the motor of the earthing switch when the selector is in a position corresponding to a locked closed mode wherein the earthing switch is closed.

An operating modes selector is for an earthing switch that includes power contacts and a motor for moving the power contacts. The selector includes a plurality of positions corresponding respectively to various operating modes of the earthing switch, and includes cams whose positions are defined by the selector position. The selector contains a first cam which pulls a first locking organ designed to mechanically block the motor of the earthing switch when the selector is in a position corresponding to a locked closed mode wherein the earthing switch is closed.

The present invention relates to an arc eliminator, and more particularly, to an arc eliminator with an earth contact. An arc eliminator comprises: a housing; an extinguisher installed on the housing; and an earth contact that is installed on the housing and protrudes out from the housing in such a way as to be connected to the ground bus bar provided inside a distribution board when the extinguisher is moved to a first position where the extinguisher is connected to a fixed bus bar provided inside the distribution board, and to be disconnected from the ground bus bar when the extinguisher is moved to a second position where the extinguisher is disconnected from the fixed bus bar.

Power receiving/distributing equipment is composed of a switchgear incorporated for each major electric path section, wherein, when arc fault occurs on an electric path to which a circuit breaker is connected, a high-speed closing device closes to detour arc current so as to flow to a ground conductor, thereby eliminating arc at a fault electric path portion. The high-speed closing device is connected to one pole or both poles of a breaking portion of the circuit breaker, and is incorporated into an insulating support member on a corresponding pole electric path so as to be able to be drawn as a whole.

Power receiving/distributing equipment is composed of a switchgear incorporated for each major electric path section, wherein, when arc fault occurs on an electric path to which a circuit breaker is connected, a high-speed closing device closes to detour arc current so as to flow to a ground conductor, thereby eliminating arc at a fault electric path portion. The high-speed closing device is connected to one pole or both poles of a breaking portion of the circuit breaker, and is incorporated into an insulating support member on a corresponding pole electric path so as to be able to be drawn as a whole.

A cable testing device (6) integrated in high-voltage electrical equipment (3) provided with a main circuit (17), including at least one line connection (4) and one cable outlet (5); at least one control means comprising at least one switch (1a) and/or one disconnecting switch (1b, 1c, 1d). The testing device (6) stands out as it is installed as a first element upstream of the cable outlet (5) and at the same time downstream of the switch (1a) and/or of the disconnecting switch (1b)(1c)(1d), the testing device (6) being independent from the operation of the main circuit (17), such that the switch (1a) and/or the disconnecting switch (1b)(1c)(1d) keep their contacts in an open position during cable testing, the voltage to perform cable testing being injected into the cable outlet (5) through the testing device (6).

A cable testing device (6) integrated in high-voltage electrical equipment (3) provided with a main circuit (17), including at least one line connection (4) and one cable outlet (5); at least one control means comprising at least one switch (1a) and/or one disconnecting switch (1b, 1c, 1d). The testing device (6) stands out as it is installed as a first element upstream of the cable outlet (5) and at the same time downstream of the switch (1a) and/or of the disconnecting switch (1b)(1c)(1d), the testing device (6) being independent from the operation of the main circuit (17), such that the switch (1a) and/or the disconnecting switch (1b)(1c)(1d) keep their contacts in an open position during cable testing, the voltage to perform cable testing being injected into the cable outlet (5) through the testing device (6).

A grounding and test device includes a chassis configured to be removably installed in a drawout switchgear compartment (e.g., a breaker compartment) having a load conductor and a line conductor therein. The device also includes an interconnection bus supported by the chassis and a ground conductor supported by the chassis. The device further includes a first vacuum circuit interrupter supported by the chassis and configured to selectively couple and decouple the interconnection bus and the line conductor, a second vacuum circuit interrupter supported by the chassis and configured to selectively couple and decouple the interconnection bus and the load conductor and a third vacuum circuit interrupter supported by the chassis and configured to selectively couple and decouple the interconnection bus and the ground conductor.

Methods, systems, devices for a motorized isolation switch including a switch enclosure with a set of fixed insulated floating input line connectors and output load connectors movably fixed to the rear panel, a removable contactor bucket insertable into the isolation switch enclosure with mating movable insulated line terminals and load terminals and a set of insulated circuit interrupters, a motorized rack and pinion assembly connected to a base of the switch enclosure, coupled for moving a contactor pan connectable to the contactor bucket along a stationary rack gear along the base of the switch enclosure between and switch open position and a switch closed position, an insulating grounding block with ground connectors, the contactor bucket with corresponding movable ground terminals to mate with the insulated ground connectors in the switch open position, and ancillary controls for communicating with remotely located controls to electrically control the operation.