A 3-phase group modular metering system, with a 3-phase four main cross bus A, B, C and N configuration is provided to distribute 3-phase four wire power to a single-phase three main cross bus A1, B1 and N1 configuration as single-phase three wire power. The system comprises a 3-phase main connection module, at least one or more single-phase in to single-phase out metering module stacks, a number of 3-phase metering module stacks ranging from as few as none to as many as a plurality and a connection joint. The connection joint is disposed between a last 3-phase module and the at least one or more single-phase in to single-phase out metering module stacks to derive the 3-phase four main cross bus A, B, C and N configuration into the single-phase three main cross bus of A1, B1 and N1 configuration. The connection joint distributes power in single-phase through the single-phase three main cross bus of A1, B1 and N1 configuration by deriving (A, B, N) or (A, C, N) or (B, C, N) combination of a 3-phase bus and forming single-phase connection interfaces.

A high-speed closing device includes a first fixed contactor which is made from a conductive material; a second fixed contactor which is made from a conductive material, and faces the first fixed contactor so as to be arranged; and a movable contactor, of which a tip is made from a conductive material, which includes a hollow hole, in which an opposite side of the tip is opened, at an inner portion, and is separated from the first fixed contactor and the second fixed contactor with a distance being longer than an insulation distance so as to be arranged before the high-speed closing device is closed, and inserts the tip between the first fixed contactor and the second fixed contactor after the high-speed closing device is closed, and electrically connects the first fixed contactor and the second fixed contactor.

A high-speed closing device includes a first fixed contactor which is made from a conductive material; a second fixed contactor which is made from a conductive material, and faces the first fixed contactor so as to be arranged; and a movable contactor, of which a tip is made from a conductive material, which includes a hollow hole, in which an opposite side of the tip is opened, at an inner portion, and is separated from the first fixed contactor and the second fixed contactor with a distance being longer than an insulation distance so as to be arranged before the high-speed closing device is closed, and inserts the tip between the first fixed contactor and the second fixed contactor after the high-speed closing device is closed, and electrically connects the first fixed contactor and the second fixed contactor.

A ground bus subassembly provided at a top (e.g., top front) of a power distribution cabinet section. The ground bus subassembly includes a first upper front frame plate, and a first ground bus section adjacent to the first upper front frame plate. A splice can attach to the first ground bus section. A ground cover covering the first ground bus section can function as a hoist rail. Ground bus subassemblies with first and second cabinet sections and first and second ground bus sections are provided, as are methods of assembly of ground bus subassemblies.

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.

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.

A section of a busbar trunking system, referred to herein as a BTS section, comprising: a plurality of conducting bars; and a female electrical connector at a first end of the BTS section; wherein the female electrical connector is arranged to receive a male electrical connector of an adjacent BTS section to electrically connect the conducting bars of the BTS section to conducting bars of the adjacent BTS section as part of a plug-and-play connection.

An installation device for installing an electrical ground rod into the earth. The electrical ground rod installation device of the present invention may comprise a shaft connecting an upper housing to a base. A user may utilize the installation device to install an electrical ground rod by first sliding the ground rod through the base and into the upper housing. In this arrangement, the base will be adjacent to approximately the middle of the ground rod and thus be at a height that can be engaged by the user from the ground, thereby avoiding the inherent risks associated with using ladders to install ground rods.

A ground and test (G&T) device includes a test device housing having upper terminals and lower terminals carried by the test device housing and engaging the load and line conductors when the test device housing in installed within the compartment of the switchgear frame. A plurality of grounding bars include a first set of grounding bars that connect the upper terminals to a lower ground bar and a second set of grounding bars that connect the lower terminals to the lower ground bus bar when the first set of grounding bars are not connected. A ground shoe assembly is connected to the lower ground bus bar and configured to engage a grounding circuit carried by the switchgear frame and includes a ground shoe bracket, bus bars, and die springs.

A ground and test (G&T) device includes a test device housing having upper terminals and lower terminals carried by the test device housing and engaging the load and line conductors when the test device housing in installed within the compartment of the switchgear frame. A plurality of grounding bars include a first set of grounding bars that connect the upper terminals to a lower ground bar and a second set of grounding bars that connect the lower terminals to the lower ground bus bar when the first set of grounding bars are not connected. A ground shoe assembly is connected to the lower ground bus bar and configured to engage a grounding circuit carried by the switchgear frame and includes a ground shoe bracket, bus bars, and die springs.