A metal-clad compliant grounding/earthing switch device configured for use within conventional switchgear is described. The device is equipped with adequate and compliant insulation of all bus connections, and is configured to close during maintenance outages grounding the live parts of the circuit feed by a particular breaker. The device enables electricians to perform maintenance and repairs in the event of an outage safely, and without the need to manually install a temporary Ground-and-Test Device. An insulated clam shell is present to limit fault propagation from live components until components are confirmed as grounded prior to maintenance of the switchgear.

A metal-clad compliant grounding/earthing switch device configured for use within conventional switchgear is described. The device is equipped with adequate and compliant insulation of all bus connections, and is configured to close during maintenance outages grounding the live parts of the circuit feed by a particular breaker. The device enables electricians to perform maintenance and repairs in the event of an outage safely, and without the need to manually install a temporary Ground-and-Test Device. An insulated clam shell is present to limit fault propagation from live components until components are confirmed as grounded prior to maintenance of the switchgear.

Ground and test devices (G&TD) have an interchangeable test configuration using serially releasably mountable first and second ground assemblies and releasably mounted primary arm conductors thereby allowing for onsite field modification of a base test unit for use to test either the load side or line side terminals without requiring two separate base test devices providing an economic and less bulky test solution for end users.

Ground and test devices (G&TD) have an interchangeable test configuration using serially releasably mountable first and second ground assemblies and releasably mounted primary arm conductors thereby allowing for onsite field modification of a base test unit for use to test either the load side or line side terminals without requiring two separate base test devices providing an economic and less bulky test solution for end users.

A grounding system for a rackable circuit breaker includes a finger cluster connector connected to a grounding bus in the circuit breaker and a rail conductor mounted in a circuit breaker cradle and connected to ground potential. The finger cluster connector includes a conductor formed from a single plate of conductive material folded into a generally U-shaped body with first and second sides divided into a plurality of fingers. Distal ends of the fingers form mutually facing parallel surfaces of a constricted passage configured to make a sliding electrical contact with the rail conductor that is advanced into the constricted passage as the circuit breaker is racked into the cradle. First and second leaf springs fastened to the conductor portion are divided into a plurality of spring finger sections with spring distal ends configured to respectively press against the distal ends of respective fingers of the conductor portion.

An arc eliminator includes a housing having a space formed therein and including an opening, an arc extinguishing part installed in the housing and including a moving rod disposed to be movable to the space, an indicator rotatably installed within the housing and seen through the opening, and an indicator rotating mechanism interworking with the moving rod when the moving rod moves, to rotate the indicator. A closing state and opening state of an arc extinguishing part may be easily recognized through an indicator and an arc accident may be minimized.

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.

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.

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.