A hydraulic fracturing system for fracturing a subterranean formation includes a primary switchgear arranged on a support structure. The system also includes a secondary switchgear, arranged on the support structure, the secondary switchgear positioned separately from the primary switchgear and within an enclosure, the secondary switchgear receiving an electrical input from the primary switchgear and including an plurality of feed connections for supplying electrical power to a plurality of fracturing equipment.

A hydraulic fracturing system for fracturing a subterranean formation includes a primary switchgear arranged on a support structure. The system also includes a secondary switchgear, arranged on the support structure, the secondary switchgear positioned separately from the primary switchgear and within an enclosure, the secondary switchgear receiving an electrical input from the primary switchgear and including an plurality of feed connections for supplying electrical power to a plurality of fracturing equipment.

A door support system is provided for an enclosure of an electrical distribution system. The door support system includes a rail fixedly secured to a door panel of the enclosure. The rail includes at least one notch. The door support system also includes a support member mounted to a frame of the enclosure. The support member is slidably mounted to the rail such that the support member slides along a length of the rail between an extended position and a retracted position. The extended position of the support member supports the door panel in an open position. The support member is in the retracted position when the door panel is in a closed position. The support member includes a detent configured to be received into the notch of the rail to releasably lock the support member in the extended position along the length of the rail.

A door support system is provided for an enclosure of an electrical distribution system. The door support system includes a rail fixedly secured to a door panel of the enclosure. The rail includes at least one notch. The door support system also includes a support member mounted to a frame of the enclosure. The support member is slidably mounted to the rail such that the support member slides along a length of the rail between an extended position and a retracted position. The extended position of the support member supports the door panel in an open position. The support member is in the retracted position when the door panel is in a closed position. The support member includes a detent configured to be received into the notch of the rail to releasably lock the support member in the extended position along the length of the rail.

A prefabricated substation is provided with a solid state breaker and a transformer. The substation preferably transforms voltage from a medium voltage to a low voltage. The substation also breaks current flow through the substation when a fault occurs. The primary components of the substation, including the transformer and solid state breaker, are located together within the housing.

A switchgear or control gear includes: a first compartment; at least one removable module; a plurality of main switchgear or control gear components; and a plurality of auxiliary switchgear or control gear components. The plurality of main switchgear or control gear components are sub-divided into a first group of components that have a lifetime greater than a threshold level and a second group of components that have a lifetime less than or equal to the threshold level. The plurality of auxiliary switchgear or control gear components are sub-divided into a first group of components that have a lifetime greater than the threshold level and a second group of components that have a lifetime less than or equal to the threshold level.

Systems and methods for configuring, with an external device, a power distribution box having priority disconnects. The power distribution box includes a housing portion and a base portion elevating the housing portion. The power distribution box receives power from an external power source and distributes the power to a plurality of alternating current (AC) output receptacles. The power distribution box further includes an antenna and a power disconnect controller coupled to the antenna to communicate with and be configured by an external device, such as a smart phone, tablet, or laptop computer. Using the external device, a user can configure the priority level and mode of the AC output receptacles. In the case of high current, the power distribution box will disconnect receptacles in accordance with the priority level and mode configuration provided by the external device.

Systems and methods for configuring, with an external device, a power distribution box having priority disconnects. The power distribution box includes a housing portion and a base portion elevating the housing portion. The power distribution box receives power from an external power source and distributes the power to a plurality of alternating current (AC) output receptacles. The power distribution box further includes an antenna and a power disconnect controller coupled to the antenna to communicate with and be configured by an external device, such as a smart phone, tablet, or laptop computer. Using the external device, a user can configure the priority level and mode of the AC output receptacles. In the case of high current, the power distribution box will disconnect receptacles in accordance with the priority level and mode configuration provided by the external device.

A combined electric appliance with a multi-capacitive screen insulation core has three groups of capacitive screens of main capacitor C1, low-voltage capacitor C2 and anti-interference capacitor C3 arranged in an insulation core of a high-voltage electric appliance such as a high-voltage bushing, a cable terminal head or the like simultaneously. A voltage display apparatus, an insulation monitor and a local discharge detector which meet accuracy requirements access a terminal of the low-voltage capacitor C2. Energy is extracted from the terminal to power the electric appliance. A grounding part for current flow is sleeved with a current transformer. The insulation core is sleeved with annular zinc oxide arrester valve plates. Head ends of the valve plates are connected with a terminal of the bushing or the cable head. Tail ends of the valve plates are connected with a flange of the bushing or the cable head.

A combined electric appliance with a multi-capacitive screen insulation core has three groups of capacitive screens of main capacitor C1, low-voltage capacitor C2 and anti-interference capacitor C3 arranged in an insulation core of a high-voltage electric appliance such as a high-voltage bushing, a cable terminal head or the like simultaneously. A voltage display apparatus, an insulation monitor and a local discharge detector which meet accuracy requirements access a terminal of the low-voltage capacitor C2. Energy is extracted from the terminal to power the electric appliance. A grounding part for current flow is sleeved with a current transformer. The insulation core is sleeved with annular zinc oxide arrester valve plates. Head ends of the valve plates are connected with a terminal of the bushing or the cable head. Tail ends of the valve plates are connected with a flange of the bushing or the cable head.