Abstract: A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

Abstract: A power distribution device, a power distribution trailer, an electric drive system and an operation method of the electric drive system are provided, the power distribution device includes: a starting power source, a switchgear room, and a tool room sequentially arranged along a first direction, the switchgear room includes a power inlet-line cabinet and a load feed outlet-line cabinet that are sequentially arranged along the first direction; at least one of the power inlet-line cabinet and the load feed outlet-line cabinet is a gas insulated switch cabinet, a cable terminal of at least one gas insulated switch cabinet is provided with a cable crimping copper bar, the gas insulated switch cabinet is matched with the cable crimping copper bar, a common cold shrinkable terminal connector can be combined with the cable crimping copper bar to realize the connection of an external device to the gas insulated switch cabinet through the cold shrinkable terminal connector.

Abstract: A modular HVDC platform and a method for constructing the same are disclosed herein. The modular HVDC platform has a topside disposed on a structural jacket. The topside includes a first rectifier module, a second rectifier module, and a utility module. The first and second rectifier modules have equipment for converting AC power to DC power disposed therein. The utility module contains equipment for supporting the operations of the rectifier modules. Each of the rectifier modules and the utility modules can be fabricated and commissioned onshore prior to installation on the structural jacket at an offshore location.

Abstract: A switch gear system is described. In some implementations, a switch gear arrestor system can include a switch gear and one or more arrestors mounted on a non-conductive insulated bar. The one or more arrestors can be connected to one or more isolators through a respective aperture in the non-conductive insulated bar. Each arrestor can be connected to one of the one or more electrical energy sources at a first end and can be connected to one of the one or more isolators at a second end. The switch gear arrestor system can further include one or more ground leads. Each ground lead can connect one of the one or more isolators to a conductive grounding bar.

Abstract: A converter arrangement includes a converter phase extending between first and second DC voltage poles. The converter phase includes an AC voltage terminal, a first converter arm extending between the first DC voltage pole and the AC voltage terminal and a second converter arm extending between the AC voltage terminal and the second DC voltage pole. The first converter arm includes a first series circuit of two-pole switching modules and the second converter arm includes a second series circuit of two-pole switching modules. Each of the switching modules includes power semiconductor switches and an energy store. A phase module arrester in an arrester branch is parallel with the two series circuits of the switching modules. The phase module arrester is configured for overvoltage protection of the switching modules of the two series circuits. A method for short-circuit protection of the converter arrangement is also provided.

Abstract: A tool has a pneumatic motor driving unit, an electric control unit, a stationary portion, a movable portion, a loading portion for clamping a connecting rod, a first heating portion, and a second heating portion. The movable portion is movably connected to a first and second stationary shaft of the stationary portion, the movable portion is connected to a movable shaft by a screw pair, the movable shaft is fixedly connected to the pneumatic motor driving unit of the stationary portion, the movable shaft is driven to rotate around its axis by the pneumatic motor driving unit, the loading portion movably connects to the second stationary shaft of the stationary portion and slides between a stationary portion body and a movable portion body, the loading portion rotates around the second stationary shaft.

Abstract: A coated electrical accessory includes a bare electrical accessory and a substantially inorganic and dried coating layer coating the bare electrical accessory. The coating layer includes a heat radiating agent and a binder. When the coated electrical accessory is tested in accordance with ANSI CI 19.4-2004 with an amount of imparted current, the coated electrical accessory exhibits an operating temperature that is less than an operating temperature of a bare electrical accessory tested in accordance with ANSI CI 19.4-2004 with the same amount of imparted current. Methods are also provided.

Abstract: An electric device has an hydraulic motor driving unit, an electric control unit, a stationary portion removably connecting to a first busbar, a movable portion removably connecting to a second busbar, and a loading portion for clamping connecting rods. The movable portion is movably connected to a first and second stationary shaft of the stationary portion, the movable portion is connected to a movable shaft by a screw pair, the movable portion is fixedly connected to the hydraulic motor driving unit, the movable shaft is driven to rotate around its axis by the hydraulic motor driving unit, the loading portion is movably connected to the second stationary shaft and slides between a body of the stationary portion and a body of the movable portion, the loading portion rotates around the second stationary shaft.

Abstract: The present disclosure may include a base frame; a transformer panel module having a main frame and a transformer disposed at an upper side of the base frame; a high voltage panel module having a high voltage enclosure coupled to one side of the main frame and a high voltage switch mounted within the high voltage enclosure; and a low voltage panel module having a low voltage enclosure coupled to the other side of the main frame and at least one of a breaker and a fuse mounted within the low voltage enclosure, thereby having an advantage of facilitating a service work for maintenance on the transformer panel module, high voltage panel module and low voltage panel module as well as minimizing a service time.

Abstract: A terminal box for a generator set is disclosed. The terminal box may include a generally open structural member configured to be mounted to a generator barrel of the generator set. The structural member may have a first end and a second end that is wider than the first end. When the structural member is mounted to the generator barrel in a first orientation, the second end may be located at a first position relative to the generator set. When the structural member is mounted to the generator barrel in a second orientation, the second end may be located at a second position relative to the generator set.

Abstract: The present disclosure proposes an input power of each unit power cell of a cascaded H-bridge inverter that is mutually insulated. To this end, the present disclosure includes a phase shift transformer configured to output a voltage of predetermined phase by receiving an AC input power having a fixed frequency, and a plurality of unit power cells serially-connected configured to output a voltage having a predetermined phase by receiving a voltage provided by the phase shift transformer, wherein the phase shift transformer is configured to include the number of phase shifts corresponding to the number of the plurality of unit power cells.

Abstract: A power supply having one or more power electronic modules that may be replaced without shutting down the power supply. Each power electronic module may be enclosed in a separate compartment of the power supply. Each compartment may have stationary electrical connectors configured to electrically connect to the power electronic module. A racking mechanism connected to a handle outside the compartment may move a power electronic module out of electrical contact with the stationary electrical connectors and/or into electrical contact with the stationary electrical connectors. Movement of a power electronic module within the compartment may occur without shutting down the power supply. Methods of replacing power electronic modules without shutting down the power supply are also provided, as are other aspects.

Abstract: A system having electrical equipment integrated on a structure is provided. The system includes at least one electrical equipment located at a spaced apart relationship and mounted on at least one structure. A method is provided for isolation of electrical equipment. The method includes opening and closing a contact by engaging or disengaging one or more terminals of the electrical equipment correspondingly with a supply line or a distribution line by a mechanism for isolation. The mechanism can be a handle or a moving mechanism which is associated with a movement in a vertical direction or horizontal direction or with a movement that provides isolation.

Abstract: A transformer station for high and medium voltages is installed beneath the earth's surface, with at least one access point to the switchgear assembly and the ventilation shafts being arranged above ground. The station includes at least one power transformer for converting high voltage to medium voltage, at least one medium-voltage switchgear assembly and auxiliary and secondary as well as protection and control devices, and at least one access or transport shaft configured for transporting all large equipment and operating means into the station and can be used as an exhaust air shaft. The access or transport shaft has ventilation channels and a movable closure element. A base surface for placing the operating means and power transformers is provided beneath the access shaft. The power transformers can be inserted into boxes, which may be adjacent to one another, once the power transformers have been placed on the base surface.

Abstract: An enclosure for electrical equipment is provided. The enclosure includes a frame, a first plate, and a first member coupled to the frame and configured to receive the first plate. The first plate is configured to receive a transformer, movable between a first position and a second position, at least partially supported by the first member when the first plate is in the first position, and offset from the first member when the first plate is in the second position.

Abstract: A transformer assembly is described. Embodiments of the transformer assembly are adapted to facile disconnection and removal of a transformer from the transformer assembly without disconnecting service lines from the transformer assembly. Moreover, embodiments of the transformer assembly are adapted to de-energize the transformer without interrupting primary power to downstream devices, and to safely and easily park energized or de-energized connectors such as loadbreak elbows during transformer maintenance. Methods of using the transformer assembly are also described.

Abstract: The present invention relates to an integrated cooling system 10 for a power station 14 comprising a transformer 16 and at least one of a generator 18 and/or a rectifier 20. The integrated cooling system 10 comprises a cooler 28 for reduction of an operative temperature of a cooling fluid circulating in the integrated cooling system 10. A pipe system 12 couples the cooler 28 to the transformer 16 and the generator 18 and/or the rectifier 20 in the power station 14. Further, a controller 32 of the integrated cooling system executes the cooling control of the integrated cooling system 10 according to operative temperatures of the transformer 16 and the generator 18 and/or the rectifier 20 in the power station 14. The provision of a common cooler for the different components of the power station 14 allows for a reduced installation space, reduced costs, and lower energy consumption for power station heating.

Abstract: A system and method for coupling electrical power subsea. The system comprises a subsea penetrator to seal an opening around a conductor extending through a partition or enclosure. The subsea penetrator comprises an integral current sensor operable to produce a signal representative of current through the conductor. The penetrator comprises a boot configured to seal the opening through which the conductor extends. The current sensor may be disposed within the boot.

Abstract: An adjustable frequency drive includes a base having a first portion and a second portion, and an active front end converter disposed on the base. The converter includes an input, an output, and a plurality of first electronic switches electrically connected between the input and the output. An inverter is disposed on the base and includes an input electrically connected to the output of the active front end converter, an output, a plurality of capacitors disposed on the first portion of the base and electrically connected to the input of the inverter, a plurality of second electronic switches disposed on the second portion of the base and electrically connected between the input and the output of the inverter, and a heat pipe assembly. The inverter is structured to provide a single, three-phase output structure.

Abstract: A transformer station for high and medium voltages is installed beneath the earth's surface, with at least one access point to the switchgear assembly and the ventilation shafts being arranged above ground. The station includes at least one power transformer for converting high voltage to medium voltage, at least one medium-voltage switchgear assembly and auxiliary and secondary as well as protection and control devices, and at least one access or transport shaft configured for transporting all large equipment and operating means into the station and can be used as an exhaust air shaft. The access or transport shaft has ventilation channels and a movable closure element. A base surface for placing the operating means and power transformers is provided beneath the access shaft. The power transformers can be inserted into boxes, which may be adjacent to one another, once the power transformers have been placed on the base surface.

Abstract: A gas-insulated switchgear apparatus includes a center conductor 2, a current transformer 4 surrounding the center conductor 2, an electric field shield 5, and a metallic vessel 1. The electric field shield 5 is located between the center conductor 2 and the current transformer 4 and surrounds the center conductor 2. The current transformer 4 and the electric field shield 5 constitute a tubular part that outputs a signal representing an electric physical quantity. The metallic vessel 1 is filled with an insulating gas 19. The tubular part has an opening 6 formed therein. In a posture in which the center axis of the tubular part about which the tubular part surrounds the center conductor 2 is substantially horizontal, the opening 6 is located in a surface of the tubular part, which surface is included in a lower portion of the tubular part and faces the center conductor 2.

Abstract: A current-sensing assembly comprising a housing and first and second current transformers contained in and fixed in position by the housing. The assembly includes at least one conducting pin corresponding to each of the first and second current transformers and inserted through the housing to expose a top end and a bottom end. The top end of the pin is electrically coupled to an end of the conducting wire of the corresponding current transformer through a window in the housing coinciding with the current transformer. The top end of a common pin is electrically coupled through the window to the opposite end of the coil conductor. The bottom end of each pin is configured to be coupled to a printed circuit board. The housing includes first and second elongated rings passing substantially through the centers of the current transformers and configured to accept first and second current lines.

Abstract: An arrangement related to subsea electric power distributing AC-system and adapted for a subsea application. The arrangement is enclosed in a watertight casing. The casing exposes a main power input connection, adapted for watertight co-ordination with a first subsea cable and a main power output connection, adapted for a watertight co-ordination with a second subsea cable. The second subsea cable is adapted for a power supply to an AC-current and AC-voltage adapted device. The arrangement includes interconnected: a voltage regulator connected to the first cable, and a NO-load switching unit connected to the second cable, and a control unit. The control unit is adapted, in a first operative mode, to regulate the output AC-voltage from the voltage regulator towards and to zero, or at least almost to zero, and in a second subsequent operative mode, to bring the NO-load switching unit from an ON-position to an OFF-position or vice versa.

Abstract: A method for operating a sealed for life compact secondary substation including a transformer, a high voltage side and a ring main unit arranged at the high voltage side and connected to a primary side of a the transformer, a secondary side of the transformer is connected a low voltage switch gear. An enclosure includes watertight material capable of withstanding corrosion at least for a life time of the compact secondary substation. The compact secondary substation is cooled with a cooling system that includes a heat exchanger. The compact secondary substation is protected with an extended arc eliminator. The compact secondary sub-station is connected to a remote control for surveillance and operation, which remote control is communicating with a fault protection equipment.

Abstract: A gas-insulated switchgear includes an electric conductor that is housed in a vessel that is sealed and filled with insulating gas, a current transformer that is housed in the vessel, which includes a coil wound around the electric conductor, an electric-field relaxing shield that is arranged in the vessel at a radially inward position relative to an inner side of the coil, and a dielectric insulating member that is arranged on an end portion of the electric-field relaxing shield.

Abstract: A metering device of a power substation and method are provided for operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform. The method includes stepping down the secondary waveform and generating a corresponding output signal; operating on the corresponding output signal for generating a corresponding first digital signal having a value proportional to the corresponding output signal and within a first range; and operating on the corresponding output signal for generating a corresponding second digital signal having a value proportional to the corresponding output signal and within a second range. The method further includes processing the first digital signal and outputting a corresponding first output signal; processing the second digital signal and outputting a corresponding second output signal; processing the first and second output signals; and generating output corresponding to the processing of the first and second output signals.

Abstract: In one embodiment, a medium voltage drive system includes at least one transformer and multiple power cell chambers each coupled to a transformer. The power cell chambers each may include a rectifier, a DC-link, and an inverter. Each power cell chamber can be separated into fixed and moveable portions, where the moveable portion includes the rectifier and the inverter and the fixed portion includes the DC-link. A power service bus can couple the fixed and moveable portions of each power cell chamber and couple in series groups of the plurality of power cell chambers.

Abstract: Power-generating units and compressor units are arranged in a compressed-air energy storage power station. According to one aspect of the invention, a common grid connection transformer is arranged, to which the power-generating units and the compressor units can selectively be connected. According to a further aspect of the invention, the power-station installation is subdivided into a power-generating area (I) in which the power-generating units are arranged, a switching and voltage-conversion area (II) in which a grid connection transformer is arranged, and a compressor area (III) in which the compressor units are arranged. The stated areas are arranged physically separately from one another. Power-station installations according to the invention can advantageously be combined to form modular power-station centers, which advantageously have common voltage rails and media rails.

Abstract: A peripheral device has a bus-controlled switching arrangement for operating a power supply. A device comprises a bus interface adapted for communicating with a remote device via a bus. A switch circuit is connected between the bus interface and a power supply. The switch circuit is operative, when the power supply is in an inactive state, for sensing bus activity and for generating a signal for activating the power supply in response to the sensed bus activity, wherein the switch circuit has no power dissipation when no activity is sensed on the bus.

Abstract: A compartmental transformer and a method maintenance therefore is provided. The transformer includes a first compartment housing first equipment electrically coupled to the high voltage side of the transformer and a second compartment housing second equipment electrically coupled with the low voltage side of the transformer. The transformer further includes a maintenance compartment, separate from the first and second compartments, for housing a plurality of maintenance devices used for servicing the transformer while the transformer is energized.

Abstract: A transformer substation including a transformer, switching equipment and switchgear equipment arranged in closed rooms.

Abstract: The invention relates to an electrical substation. The inventive substation is characterised in that it consists of a special ring-type electrical configuration, known as a network ring, comprising SF6-insulated armoured modules M by way of a high-voltage switchgear. According to the invention, the modules are disposed such as to form longitudinally-linked squares, with a segregated phase arrangement. Owing to the ring configuration A, the use of armoured modules M and the segregated phase arrangement, it is possible to produce standardised base elements which are tested before being moved to the site of the substation in order to be connected to other elements and/or existing equipment with the same configuration or another standard configuration. In this way, a substation can be mounted and enlarged without the need for discharges or service interruptions and with a minimum loss of time in terms of mounting, repair and enlarging operations.

Abstract: A method for operating a sealed for life compact secondary substation including a transformer, a high voltage side and a ring main unit arranged at the high voltage side and connected to a primary side of a the transformer, a secondary side of the transformer is connected a low voltage switch gear. An enclosure includes watertight material capable of withstanding corrosion at least for a life time of the compact secondary substation. The compact secondary substation is cooled with a cooling system that includes a heat exchanger. The compact secondary substation is protected with an extended arc eliminator. The compact secondary sub-station is connected to a remote control for surveillance and operation, which remote control is communicating with a fault protection equipment.

Abstract: An electrical transformer station comprising a modular foundation which is assembled from a plurality of cuboid modules fixed to each other and forming a solid and static foundation. The cuboid modules may be provided with T-formed grooves in the sides of the cuboid modules. Adjacent cuboid modules may be linked together by inserting corresponding H-formed plugs into the T-formed grooves of two adjacent cuboid modules.

Abstract: An improved power distribution unit substation, having a plurality of differing voltage rated main breaker cells, encased within a single housing is disclosed. The improved power distribution substation saves considerable floor space as compared to prior art substations. One embodiment houses a plurality of main breaker cells in a single housing. In this embodiment, a low voltage main breaker cell is vertically positioned above a plurality of medium voltage main breaker cells. Alternatively, a medium voltage main breaker cell is vertically positioned above a plurality of low or medium voltage cells. Improved single-ended and double-ended power distribution substations are disclosed that offer cost and floor space savings as compared to prior art substations.

Abstract: A metering device of a power substation and method are provided for operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform. The method includes stepping down the secondary waveform and generating a corresponding output signal; operating on the corresponding output signal for generating a corresponding first digital signal having a value proportional to the corresponding output signal and within a first range; and operating on the corresponding output signal for generating a corresponding second digital signal having a value proportional to the corresponding output signal and within a second range. The method further includes processing the first digital signal and outputting a corresponding first output signal; processing the second digital signal and outputting a corresponding second output signal; processing the first and second output signals; and generating output corresponding to the processing of the first and second output signals.

Abstract: An object of the present invention is to provide a switching device for power distribution, wherein the entire load side-area including a circuit breaker can be protected against the grounding, whereby the protection region can be widened, leading to an enhancement in reliability. A circuit breaker, a current transformer and a zero-phase current transformer disposed in series are constructed as a unit, mounted on a carriage and accommodated in a power-receiving/distributing board. The switching unit for power distribution is constructed for connection to and for disconnection from a power source side-conductor and a load side-conductor. The zero-phase current transformer is disposed at a power source side-portion of the circuit breaker.

Abstract: A transformer is formed by a housing having a main transformer compartment, a first compartment for the input terminals for the main power supply, a second compartment for the output terminals to supply the load and a third compartment for a manually operable switching unit, where each of the compartments is maintained separately from each of the others and each has a manually openable interlocked cover which can be opened to provide access to an interior of the respective compartment. The switch assembly has switch contacts mounted within a switch container located within the third compartment and a manually operable member mounted one on side wall located within the third compartment outside the switch container for moving the switch contacts between open and closed positions. The switch container has a transparent window in a wall thereof through which the contacts can be observed and an insulating liquid bath maintained separate from an insulating liquid bath for the transformer assembly.

Abstract: The invention relates to a voltage transformer (1) including a housing (12) which encloses, at least partially, a mains plug (3, 4) connectable to a mains voltage source, a terminal plug (8) connectable to a terminal, and a voltage-transforming circuit, said housing (12) comprising a first housing component (2) and a second housing component (6) movably connected to said first housing component (2) by a guide means and implemented as a reception means (9) for receiving therein the terminal, and said voltage transformer (1) being adapted to be moved from a transport position to a charging position. In order to improve the handiness of the voltage transformer (1) during charging and, in particular, during transport, the present invention is so conceived that, at the transport position, the housing components (2, 6) have been moved relative to one another such that the space occupied at the transport position is smaller than that occupied at the charging position.

Abstract: A modular electrical distribution system includes a number of linked segments. A first electrical component is mounted in one of the segments and a second electrical component is mounted in another one of the segments. The first and second electrical components are made by different manufacturers. The linked segments are configured to be transported as a single unit without an additional external framework.

Abstract: The invention relates to a voltage transformer (1) including a housing (12) which encloses, at least partially, a mains plug (3, 4) connectable to a mains voltage source, a terminal plug (8) connectable to a terminal, and a voltage-transforming circuit, said housing (12) comprising a first housing component (2) and a second housing component (6) movably connected to said first housing component (2) by a guide means and implemented as a reception means (9) for receiving therein the terminal, and said voltage transformer (1) being adapted to be moved from a transport position to a charging position. In order to improve the handiness of the voltage transformer (1) during charging and, in particular, during transport, the present invention is so conceived that, at the transport position, the housing components (2, 6) have been moved relative to one another such that the space occupied at the transport position is smaller than that occupied at the charging position.

Abstract: A cabinet for an uninterrupted power source (UPS) is disclosed. The cabinet has three portions that characterize the frame. A front portion contains capacitor assemblies, power DC Link, power electronic components, and a control panel. The control panel and power DC Link are situated for front access and cover the power electronic components and capacitors. A rear portion holds a plurality of magnetic components. The magnetic components are accessible from the back of the cabinet and can be installed last in the assembly of the cabinet and configured for a specific voltage rating. A bus portion is divided from the front and rear portions and contains the bus bars for electrical connection of the UPS.

Abstract: A mobile metering system (MMS) comprises a trailer-mounted fully-enclosed three-phase set of current transformers (CTs) and power transformers (PTs), and a metering interface. The instrument transformers reduce the source voltage to a meterable level. The MMS enclosure enables a single utility work crew to connect source-side power bushings mounted on the roof of the MMS to conductors from a compatible source, such as the secondary side of a substation transformer, without the need for a bucket truck. Load-side power bushings are also mounted on the roof of the MMS for connection to the power distribution network. An electromagnetic locking system prevents access to the interior of the enclosure while the MMS is energized. A rigid ground grid mounted on the roof of the MMS grounds the insulators, a ground loop grounds the CTs and PTs, and both the ground grid and the ground loop are connected to the earth ground.

Abstract: A module comprising: a supporting frame, having a fixed and a movable part; first actuator for wiring the movable part; first and second sets of three insulating posts, arranged on the fixed part along two corresponding rows; first and second disconnection contacts being respectively associated with the insulating posts and being electrically connectable to the module, to corresponding electric terminals. The module comprises a set of three multifunctional interruption assemblies, each of which comprises: a supporting insulator, on the movable part and connected in an elbow-shaped configuration to a containment insulator which contains an interruption unit having a fixed movable contact which is operatively connected to second actuation means; third and fourth disconnection contacts, which are electrically connected to the interruption unit and are connected to the first and second disconnection contacts, respectively. Further, the first and/or second actuator comprises a motor with position control.

Abstract: The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked by the insulating tube 21a and the primary-side lead lines 49 and 53 connected electrically to the primary-side terminal of the instrumentation transformers 6a and 7a are made routed from the container 15b through the insulating tube 21a to the container 15a, and the containers 15b and 15c are linked by the insulating tube 21b and the primary-side lead lines 51 and 55 connected electrically to the primary-side terminal of the instrumentation transformers 6d and 7e are made routed from the container 15b through the insulating tube 21b to the container 15c.

Abstract: The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked by the insulating tube 21a and the primary-side lead lines 49 and 53 connected electrically to the primary-side terminal of the instrumentation transformers 6a and 7a are made routed from the container 15b through the insulating tube 21a to the container 15a, and the containers 15b and 15c are linked by the insulating tube 21b and the primary-side lead lines 51 and 55 connected electrically to the primary-side terminal of the instrumentation transformers 6d and 7e are made routed from the container 15b through the insulating tube 21b to the container 15c.

Abstract: The accessory mounting assembly for supporting a plurality of fuses for electrical distribution equipment has a mounting bracket having a mid-portion and top and bottom bent ends. A mounting board, for supporting at least one fuse, is attached to the mounting bracket. The mounting board has a series of notches in one end of the mounting board and a multiplicity of bolt holes at a distal end from at least one of the notches. This mounting board configuration provides a compact holding formation for fuses or lightning arresters.

Abstract: A dielectric material housing for accommodating an assembly such as a high voltage, power-electronics assembly. The housing is, for example, in a cuboid shape and has a U-shaped wall section which extends from its top surface via its front surface to its bottom surface, to whose outer surface ground potential can be applied, and to whose inner surface high voltage can be applied. An opening for an electrical connection of the assembly is provided in sections of the housing wall which forms the two side surfaces of the housing.

Abstract: A compact indoor power distribution substation employs ambient-air-insulated high-voltage components, in lieu of gas-insulated components, for the distribution at 36 kV or less of electrical power from 60 kV to 245 kV high-voltage incoming lines. The substation is contained in a rectangular building having a ground floor and a cross-shaped upper floor.

Abstract: A modular electrical substation for erection at a prepared site has a horizontal steel base formed of interconnected longitudinal and transverse beams and is set on the prepared site. An open top oil containment pan is centrally supported on the base and receives an electrical transformer therein. A pair of vertically extending frameworks formed of steel columns and connecting cross members are mounted on opposite ends of the base. One or more bays of circuit breakers and disconnect switches are supported on the base and frameworks. Incoming and outgoing conductors are dead ended on one or both of the frameworks which are connected by guy wires extending therebetween to distribute the conductor tension among the two frameworks. The central location of the transformer maintains the base in position on the prepared site avoiding the need for additional anchoring and/or foundations enabling the substation to be removable and reusable.