Abstract: A mechanical strain reduction system include a flexible circuit section of a printed circuit board configured with a meandering shape while in a static state, and a compressible material having a cavity such that the meandering flexible circuit section is positioned within the cavity while the flexible circuit section is in the static state. The flexible circuit section can be part of a rigid-flexible printed circuit board or a flexible printed circuit board. The cavity can be shaped with the same meandering shape as the flexible circuit section in the static state. In general, the cavity is sufficiently shaped to allow positioning of the meandering flexible circuit section within the cavity. Support structures of the same, or different, compressible material can be interspersed within the meander of the flexible circuit section.

Abstract: According to an aspect of the disclosure, there is provided an electrical distribution bus system that includes first and second bus bars, a dielectric insulator, and at least one fastener coupling the bus bars and dielectric insulator. Each of the bus bars includes an elbow portion from which a pair of straight portions extends at elbow angles, the straight portions being disposed at right angles to each other. The dielectric insulator has a length and a width, the width being no greater than twice the length, the length extending perpendicularly between the elbow portions. The fastener couples the dielectric insulator between the bus bars, the dielectric insulator electrically insulating the first and second bus bar from one another.

Abstract: A device for holding at least one switch within an enclosure includes a frame configured to surround at least a portion of the switch. The frame includes a bridge portion extending along a back portion of the switch, and lateral arms extending along respective side portions of the switch. The lateral arms include fastening equipment configured to provide an adjustable retention of the switch in the enclosure. The device may be included in a switch cabinet.

Abstract: A connection apparatus includes a housing portion comprising a back panel and side panels, the back panel and side panels partially defining a cavity having an access orifice, the side panels partially defining an entry area to the access orifice, a fuse holder assembly disposed in the cavity, and a cover disposed in the cavity between a portion of the fuse holder assembly and the entry area to the access orifice, the cover obscures a portion of the fuse holder assembly.

Abstract: A power source circuit shut off device includes a plug having a terminal metal fitting and a housing to which the terminal metal fitting is attached, and a plug attachment section having a second terminal metal fitting and a second housing to which the second terminal metal fitting is attached. The housing has a second opening section at its side face perpendicular to its bottom face at a second housing side, the second opening section being adapted for attaching the terminal metal fitting to the housing. The terminal metal fitting and the second terminal metal fitting are connected to the second housing. The second housing has a closing wall which closes the second opening section in a state that the housing is positioned at the terminal contact position at which the housing is not yet accommodated in the second housing.

Abstract: Fused load interrupters have up to now used claw terminals or screw connections for connecting to horizontal busbars in a switchgear unit. Fused load interrupters have not been suitable until now for connecting to vertical busbars in switchgear units. At least one embodiment of the invention provides a fused load interrupter with plug contacts, such as are known from load interrupters with fuses, thereby allowing fused load interrupters to replace the more expensive load interrupters with fuses in switchgear units with vertical busbars.

Abstract: For use in switchgear equipment having channel bus bars joined together at a bus joint, there is provided a method of servicing and maintaining a channel bus splice assembly and method. The channel bus splice assembly comprises switchgear or switchboard equipment having channel bus bars joined together at a bus joint, there is provided a channel bus splice assembly. The channel bus splice assembly comprises an inner splice plate defining a plurality of throughbores. A sliding clamp plate is configured to reciprocally move within the inner splice plate. The sliding clamp plate defines a plurality of access ports. A pair of nut plates is coupled to the sliding clamp plate and having threaded orifices corresponding to selected throughbores in the inner splice plate. An outer splice plate having a plurality of throughbores corresponding to the threaded orifices in the nut plates.

Abstract: For use in switchgear equipment having channel bus bars joined together at a bus joint, there is provided a channel bus splice assembly and method. The channel bus splice assembly comprises switchgear or switchboard equipment having channel bus bars joined together at a bus joint, there is provided a channel bus splice assembly. The channel bus splice assembly comprises an inner splice plate defining a plurality of throughbores. A sliding clamp plate is configured to reciprocally move within the inner splice plate. The sliding clamp plate defines a plurality of access ports. A pair of nut plates is coupled to the sliding clamp plate and having threaded orifices corresponding to selected throughbores in the inner splice plate. An outer splice plate having a plurality of throughbores corresponding to the threaded orifices in the nut plates.

Abstract: A bus brace comb assembly for use in a switchgear assembly. The switchgear assembly has a channel bus bar for conveying electrical current in each phase of the switchgear assembly. The bus brace comb assembly holds the bus bar in place against magnetic forces associated with short-circuit currents in the switchgear bus bar. The bus brace comb assembly comprises a front comb assembly including a first bus clip configured to position the bus bar and a front brace coupled to the bus clip. A rear comb assembly including an interlock clamp configured to engage the channel bus bar and a second bus clip secured to the interlock clamp with a fastener and a rear brace coupled to the interlock clamp/bus clip assembly. A flange of the channel bus bar is pinched in the interlock clamp/bus clip assembly to secure channel bus bar in the switchgear assembly.

Abstract: To prevent lightning from destroying equipment in a housing structure, a shield structure is built within the housing structure for enclosing electrical conductors that may allow surge currents to be routed into the housing structure. The shielding structure is constructed of ferrous or non-ferrous metal and preferably of the same material as that of the ground plane of the housing structure to which the electrical conductors are mounted. A terminal cover strip for enhancing efficient grounding is also disclosed.

Abstract: A power supply shut-off apparatus 10 includes a fuse-accommodating box 14, a power supply-side bus bar 15, a load-side bus bar 16, and a plug 18 for connecting a power supply and a load through a fuse 13. A mounting portion 17 is provided with an insulation wall 11, a terminal 16a of the power supply-side bus bar 16 is located on one surface side of the insulation wall 19, and a terminal 11 of the fuse 13 is located on the other surface side of the insulation wall 19. The plug 18 is formed of a plug housing 49 and a terminal member 50 having a U-shaped cross section, the terminal member 50 is mounted astride the insulation wall 19 for electrically connecting the terminals 11, 12 of the fuse 13 to either one of terminals 15a, 16b of the power supply-side bus bar 15 and the load-side bus bar 16.

Abstract: A U-shaped metal member for securing a circuit component to a circuit board in place of conventional screws and nuts. The element is inserted through aligned holes of the component and the board and is wave soldered to the board for permanent securement.

Abstract: The interface conductors, stabs and runbacks, which are engaged at first ends by quick disconnects on electrical apparatus in a switchgear assembly, are fabricated from a stacked pair of elongated, flat conductors secured together at the first ends by elongated fasteners which are compressed into countersunk through apertures in the flat conductors to form a joint with no lateral projections. The interface conductors are supported adjacent the disconnects by a first support having a base member with through openings in which the conductors are snugly supported, and rigid projections with planar surfaces extending from the base member toward the quick disconnects alongside the openings and against which the interface conductors are secured adjacent free ends of the projections. A second support spaced rearward of the first support provides additional support for the runbacks. Interphase supports formed by C-channels are provided for the runbacks between the first and second supports.

Abstract: A functional feeder unit of a low-voltage electrical cubicle contains a vertical multipole busbar comprising conducting bars and a mounting plate for support and connection of an electrical apparatus. A protection grid equipped with holes is positioned at the front of the bars which extend edgewise in the parallel vertical planes offset along the transverse direction between two flanges. A connection interface with draw-in contacts is inserted between the protection grid to engage on the corresponding phase bar. Centering means position the mounting plate on the grid to align the ends of the current conductors of the mounting plate on the bars in a direction perpendicular to the connection interface.

Abstract: Hollow risers in switchgear are preferably formed by a confronting pair of spaced apart U-channels. Stab conductors for connecting switching apparatus in the switchgear to the risers have a pair of flat members straddling and secured to the two U-channels by mounts which include backing plates bearing against the inner surfaces of the confronting legs of two U-channels and bolts extending through the stab conductors and U-channel legs and engaging threaded apertures in the backing plates. To accommodate a range of current ratings, the confronting channels can have first and second leg thicknesses t.sub.1 and t.sub.2, which can be different but the outer widths of the channels are all the same. The backing plates have a first surface with a third thickness in one section and a fourth thickness in a second section. This first surface bears against the U-channel legs when the legs are of different thicknesses and t.sub.1 plus t.sub.3 is made equal to t.sub.2 plus t.sub.4.