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 simulated protected loads panel system for managing energy consumption and obviating the need to install a physical protected loads panel in conjunction with an energy storage system, comprising a controller, in operable communication with electrical current and/or voltage sensors and relays, which is configured to control the amount of and/or distribution of electrical power from a source of electrical power to an electrical load based on user preference, energy storage system charge, and/or available or anticipated power generation and/or usage.

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 method for loose joint detection in medium voltage switchgears with busbar joints, circuit breaker upper and lower spouts, and cable connection joints, arranged in an air insulated housing, and medium voltage switchgear itself, in order to create an effective loose joint detection with lower operating expense, but with high performance and accuracy, involves measuring actual temperatures at a first phase as a first temperature (T1), at a second phase as a second temperature (T2), at a third phase as a third temperature (T3), at predefined critical points, such as at the busbar joints, and/or at the circuit breaker upper spouts, and/or at the circuit breaker lower spouts, and/or the cable connection; and comparing temperatures in a logical dependency Ti>(Tj+dT), with ij, permuted with i from 1, 2, 3, and j from 1, 2, 3, and setting the alarm if the logical dependency is fulfilled.

A method for loose joint detection in medium voltage switchgears with busbar joints, circuit breaker upper and lower spouts, and cable connection joints, arranged in an air insulated housing, and medium voltage switchgear itself, in order to create an effective loose joint detection with lower operating expense, but with high performance and accuracy, involves measuring actual temperatures at a first phase as a first temperature (T1), at a second phase as a second temperature (T2), at a third phase as a third temperature (T3), at predefined critical points, such as at the busbar joints, and/or at the circuit breaker upper spouts, and/or at the circuit breaker lower spouts, and/or the cable connection; and comparing temperatures in a logical dependency Ti>(Tj+dT), with ij, permuted with i from 1, 2, 3, and j from 1, 2, 3, and setting the alarm if the logical dependency is fulfilled.

An energized parts guard is disclosed comprising a panel of substantially rigid, electrically insulative material wherein the substantially rigid panel further comprises a first one or more apertures and a second one or more apertures. The first one or more apertures are so dimensioned to accept one or more circuit breakers inserted into the first one or more apertures such that there is less than a 12.5 mm gap between the panel and the circuit breaker on at least two sides of the one or more circuit breakers. The second one or more apertures are positioned to facilitate access to at least one terminal of each of the one or more circuit breakers when the one or more circuit breakers are inserted into the first one or more apertures.

An energized parts guard is disclosed comprising a panel of substantially rigid, electrically insulative material wherein the substantially rigid panel further comprises a first one or more apertures and a second one or more apertures. The first one or more apertures are so dimensioned to accept one or more circuit breakers inserted into the first one or more apertures such that there is less than a 12.5 mm gap between the panel and the circuit breaker on at least two sides of the one or more circuit breakers. The second one or more apertures are positioned to facilitate access to at least one terminal of each of the one or more circuit breakers when the one or more circuit breakers are inserted into the first one or more apertures.

Motor control centers have units or buckets with an operator mechanism with a retractable power stab assembly and one or more sliding shutters that controllably block access to a stab isolation port based on position of the operator disconnect handle using an attached shutter cam that slides the shutter right and left.

Motor control centers have units or buckets with an operator mechanism with a retractable power stab assembly and one or more sliding shutters that controllably block access to a stab isolation port based on position of the operator disconnect handle using an attached shutter cam that slides the shutter right and left.

An assembly for use in an electrical power distribution system includes a housing that includes an interior space; an electrical apparatus in the interior space, the electrical apparatus including an electrical connection mechanism that is configured to move between at least two positions; an observation port through the housing, the observation port being configured to allow visual observation of the electrical connection mechanism in the interior space from an exterior of the housing; and an optical guide between the interior space and a light source. The light source is outside of the interior space and the optical guide is configured to deliver light from the light source to the interior space when the light source emits light.