For protecting wildlife from high voltage conductors proximate to a utility pole, dielectric covers are used to cover fuse cutouts, bushings, or other connections to insulators. Such covers include a vertical slot for receiving an energized wire so the cover can be installed using a hot-stick while the wire is energized. To eliminate leakage currents flowing across the cover under high voltage conditions, which previously led to localized melting of the cover, inner walls of the cover are molded that are laterally separated from the outer walls of the cover. The double wall design eliminates leakage currents due to the extra dielectric wall and air gap, and the inner wall is not subject to contamination from conductive pollutants. The double wall design also increases the insulating properties of the cover.

For protecting wildlife from high voltage conductors proximate to a utility pole, dielectric covers are used to cover fuse cutouts, bushings, or other connections to insulators. Such covers include a vertical slot for receiving an energized wire so the cover can be installed using a hot-stick while the wire is energized. To eliminate leakage currents flowing across the cover under high voltage conditions, which previously led to localized melting of the cover, inner walls of the cover are molded that are laterally separated from the outer walls of the cover. The double wall design eliminates leakage currents due to the extra dielectric wall and air gap, and the inner wall is not subject to contamination from conductive pollutants. The double wall design also increases the insulating properties of the cover.

A partition cover for a switchgear enclosure includes a main cover with a lip arranged along a first edge of the partition cover, a sliding cover with a second lip arranged along a second edge of the sliding cover, and a locking mechanism. The sliding cover is slidably supported on the main cover. The locking mechanism is fixed to the main cover and operably connected to the sliding cover, the locking mechanism is arranged to lock position of the sliding cover relative to the main cover to fix the partition cover within an interior of a switchgear enclosure. Switchgear enclosures and methods of emplacing and removing partition covers from within switchgear enclosures are also described.

A panelboard assembly includes a plurality of subpanel assemblies and three power distribution blocks (PDBs). Each of the subpanel assemblies includes a branch breaker assembly electrically connected to a three-phase power supply and configured to be electrically connected to a group of loads. The branch breaker assembly includes a plurality of branch circuit breakers, each configured to switch on or off an electrical connection to a respective one or more loads in the group of loads. Each of the three PDBs is associated with a phase of the three-phase power supply. The three PDBs are disposed downstream of the power supply and upstream of the breaker assembly of each of the plurality of subpanel assemblies. Each PDB is configured to receive electrical power through a single bus and distribute the received electrical power to the branch breaker assembly of each of the plurality of subpanel assemblies via separate buses.

A panelboard assembly includes a plurality of subpanel assemblies and three power distribution blocks (PDBs). Each of the subpanel assemblies includes a branch breaker assembly electrically connected to a three-phase power supply and configured to be electrically connected to a group of loads. The branch breaker assembly includes a plurality of branch circuit breakers, each configured to switch on or off an electrical connection to a respective one or more loads in the group of loads. Each of the three PDBs is associated with a phase of the three-phase power supply. The three PDBs are disposed downstream of the power supply and upstream of the breaker assembly of each of the plurality of subpanel assemblies. Each PDB is configured to receive electrical power through a single bus and distribute the received electrical power to the branch breaker assembly of each of the plurality of subpanel assemblies via separate buses.

Methods, systems, and apparatuses provide power from multiple input power sources to adjacent outputs efficiently and reliably. Aspects of the disclosure provide a power distribution unit (PDU) that includes a number of power outputs including first and second adjacent power outputs. The PDU includes a printed circuit board having a first conducting layer electrically interconnected to a first power input connection and the first power output, a second conducting layer that is at least partially above the first conducting layer and in facing relationship thereto. The second conducting layer is electrically insulated from the first conducting layer and electrically interconnected with a second power input connection and the second power output, the first and second power outputs thereby connected to different power inputs.

Methods, systems, and apparatuses provide power from multiple input power sources to adjacent outputs efficiently and reliably. Aspects of the disclosure provide a power distribution unit (PDU) that includes a number of power outputs including first and second adjacent power outputs. The PDU includes a printed circuit board having a first conducting layer electrically interconnected to a first power input connection and the first power output, a second conducting layer that is at least partially above the first conducting layer and in facing relationship thereto. The second conducting layer is electrically insulated from the first conducting layer and electrically interconnected with a second power input connection and the second power output, the first and second power outputs thereby connected to different power inputs.

A bus bar system having at least one bus bar which is accommodated in a contact-protection housing in a contact-protection manner and in an accessible manner via contacting passages for electrical devices and/or device adapters, the contact-protection housing having a lower part and an upper part which is detachably fixed on the lower part and between which the at least one bus bar is held, wherein the upper part has, on its side facing the lower part, a plurality of plug-in receptacles extending from the latter into the lower part, and the lower part has at least one slide with at least one latching pawl which can be adjusted between a locking position, in which the at least one latching pawl engages in the plug-in receptacle, and a release position, in which the at least one latching pawl is positioned in front of the plug-in receptacle. A corresponding method is further described.

A bus bar system having at least one bus bar which is accommodated in a contact-protection housing in a contact-protection manner and in an accessible manner via contacting passages for electrical devices and/or device adapters, the contact-protection housing having a lower part and an upper part which is detachably fixed on the lower part and between which the at least one bus bar is held, wherein the upper part has, on its side facing the lower part, a plurality of plug-in receptacles extending from the latter into the lower part, and the lower part has at least one slide with at least one latching pawl which can be adjusted between a locking position, in which the at least one latching pawl engages in the plug-in receptacle, and a release position, in which the at least one latching pawl is positioned in front of the plug-in receptacle. A corresponding method is further described.

The present invention relates to an apparatus and method for securing a box cover to a watthour meter socket box. In certain embodiments, the apparatus has a clamping member that fits over a wall of a meter box and a lock housing that locks to the clamping member after a box cover has been installed thereby securing the cover to the box. Further embodiments relate to a clamping member and a lock housing wherein the clamping member generally comprises a clamp, clamp actuating member, and fastening shelf, and wherein the clamp actuating member may comprise a lever or threaded member to attach the clamping member to a wall of a meter box base. The box cover is secured to the meter box base when the clamping member is secured to the wall and used in combination with the lock housing and a locking shaft.