摘要:
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.
摘要:
A method of making a forming wheel includes mixing and melting an electrically conductive material, a latex rubber material, and a polycarbonate material to produce a weatherproof material mixture, blending carbon black with polyethylene to produce an electrically conductive additive, positioning an injection mold of the forming wheel in fluid communication with an exit end of a heating barrel, injecting the weatherproof material mixture into an entry end of the heating barrel, introducing the electrically conductive additive through a lateral port of the heating barrel proximate to the exit end to partially mix with the weatherproof material mixture to produce an injection mixture, and injecting the injection mixture into the injection mold to produce the forming wheel.
摘要:
A cable sealing assembly for a cable entry in a cabinet housing electronic equipment. The cable sealing assembly comprises a tongue-shaped protruding member, an elastic cable sealing member configured to be shaped around the edge of the tongue-shaped protruding member and a corresponding recessed member configured to receive the protruding member and the cable sealing member in between. The elastic cable sealing member has a plurality of through holes forming a single row, each hole configured to have a cable extending there through. The cable sealing assembly is configured to seal the cable entry when the protruding member and the recessed member together apply an even pressure on the cable sealing member.
摘要:
Current transformer (CT) retainers (100, 200, 300, 400) are disclosed for use in an electrical enclosure (510) for an electrical panel (500). An exemplary CT retainer includes a body that has one end portion (110, 210, 410) configured to mount onto a wall (140) of the electrical enclosure. The body of the CT retainer also includes an opposite end portion with a basket (150, 250, 350, 450) for housing a CT. The basket includes a flexible clip (160 and 180, 260 and 280, 360 and 380, or 470) which is con figured to flex to allow insertion of the CT into the basket or removal of the CT from the basket.
摘要:
A method, apparatus, and system are described for a monolithic, pre-wired, pre-engineered, and pre-assembled integrated platform for a critical power supply and electrical distribution system that is scalable and modular. The skeletal framework of the integrated platform acts as an equipment support structure and includes an upper superstructure and a lower superstructure. Two or more cabinet enclosures are mounted onto the lower superstructure where their weight is supported by the skeletal framework. One or more National Electric Code approved (NEC-approved) electrical cable routing support systems are mounted onto the upper superstructure. The skeletal framework also includes one or more vertical columns that are connected between the upper superstructure and the lower superstructure. The skeletal framework and the cabinet enclosures are fabricated in place as a monolithic, pre-wired, pre-engineered, and pre-assembled integrated platform prior to being installed.
摘要:
An electric assembly for electrically connecting at least one wind turbine being located off-shore with an electric subsea cable being connected to an on-shore power grid is provided. The electric assembly has (a) a transformer for transforming a first voltage level being provided by the at least one wind turbine to a second voltage level of the subsea cable, and (b) an external equipment being electrically and mechanically connected to the transformer for controlling an operation of at least the transformer. The transformer and the electric equipment are formed by a preinstalled package, which can be mechanically handled as a single piece. Further, a wind turbine having such an electric assembly, a wind turbine cluster having such a wind turbine, and a method for mounting such an electric assembly to a tower of a wind turbine are provided.
摘要:
A control cabinet includes at least two plate shaped elongated wall segments. At least one wall segment features at least one open-edged cutout. Edges of adjacent wall segments facing each other, adjoin each other, forming a seal. Each cutout is covered by a frame. The frame includes a plurality of grommets to accommodate cables. In an assembled state each frame is enclosed and each frame protrudes beyond the butt joint between adjacent wall segments, covering same.
摘要:
A control cabinet for installing electronic equipment includes a bottom, wall parts which may be disassembled, at least one door and a top, in which devices for securing the equipment, particularly withdrawable mount fixtures, may be arranged in the control cabinet and cable lead-throughs may be provided on the control cabinet. The walls may be produced from fire-resistant material. An air conditioner is provided for regulating the temperature in the control cabinet. The openings and cable lead-throughs of the control cabinet may act in a self-sealing manner in case of fire. Furthermore, a method for assembling a control cabinet around an apparatus rack fitted with equipment in operation.
摘要:
A system to facilitate the use of an automation control disposed within an enclosure. An automation control, such as a distributed motor starter, is disposed within an enclosure. The control is coupled to modules, such as I/O modules, mounted to a glandplate. The glandplate is mounted to the enclosure over an appropriate opening. Furthermore, the glandplate is designed to accommodate a variety of module arrangements and to facilitate the connection of various data and power lines without individually wiring the lines to a separate terminal block.
摘要:
A housing for electrical devices such as connectors, circuit breakers, and fuse panels. A cable outlet port member is separate from the housing to provide unidirectional resistance to movement of a cable relative to the housing. The non-integral relationship permits the members to be replaced in the event of damage. A busbar formed by a stamping and bending operation is also disclosed for use in combination with conventional circuit breakers.