The invention relates to a method and a modular holding and exchanging system (1) for medium or high voltage converters, preferably a modular multilevel converter, comprising a rack (2) for receiving at least two power modules (3) arranged on top of one another in receiving spaces (4), wherein the rack (2) has at least two pairs of vertical standing elements (5) and at least two carrier elements (6) connecting the vertical standing elements (5) in a longitudinal direction (10) of the rack (2) in a horizontal support plane (9), a lifting tool (7) that can be coupled with the rack (2), which lifting tool (7) comprises at least one, preferably at least two, rolling bodies (19) that can be adjusted between a rest position (13) and a support and/or service position (14) for temporarily raising and/or moving a power module (4), wherein the power modules (4) have support surfaces (16) projecting in a transverse direction (11) with respect to a housing width (15) for being supported on the carrier elements (6), and the carrier elements (6) have an upper side (17) provided for at least parts of the support surface (16) of the respective power module (4) to rest on, and are configured as a profile element such that every carrier element (6) has at least one, preferably at least two passages (18), each, that are spaced apart from one another in the longitudinal direction (10), for at least one rolling body (19) to pass through in the service position (14) of the lifting tool (7), and wherein the lifting tool (7) comprises a longitudinally extended profile body (21), preferably a hollow body, configured so as to be insertable into the profile element of the carrier element (6) in the rest position (13), in which profile body (21) a lever device (20) is formed for adjusting the at least one rolling body (19), preferably of the at least two rolling bodies (19), which are spaced apart from one another in the longitudinal direction (10), from the rest position (13) into the service position (14).

A power conversion apparatus is provided to prevent the arc flash generated in a board from flowing out to a operation surface for operating the board, and also to relieve the pressure inside the board to the outside from the flapper section provided on the ceiling. The power conversion apparatus that has taken measures against an arc flash composed of a power converter and a board accommodating the power converter is provided. A BUS which constitutes the power converter has the first processing that makes it hard to fly the flash in a place where arc flash is not desired to occur. A door is placed on the front board that can be opened and closed by the operator. The board has an explosion-proof shutter part to prevent the arc flash from being released to the outside by the pressure inside the board, and has a flapper section for releasing the pressure inside the board to the outside from the ceiling of the board unit, when the arc flash occurs.

The invention relates to a method for producing a power module (1) and a power module (1), in particular for a medium or high voltage converter (2), comprising at least one power semiconductor module (3), at least one energy storage module (5), at least one cooling device (7), at least two busbars (10), wherein the cooling device (7) is configured to be electrically conductive and is connected to a protective housing (19) shielding at least the power semiconductor module (3) from the environment, which protective housing (19) has at least one insertion opening (20) for inserting and fastening a connecting element (15), and an electrically conductive connecting element (15) is arranged at a predefinable connection position (16) between at least the cooling device (7) and one of the busbars (10) for forming a defined charge-reversal path (17).

A high power density power supply includes at least one power module and a cooling fan in a casing. A first filter circuit board facing upward is provided below the cooling fan. A second filter circuit board facing downward is provided above the cooling fan. The back of the second filter circuit board is provided with a plurality of buffer pads. An insulating plate is disposed on the buffer pads to completely cover the top of the second filter circuit board. Thereby, the insulating plate provided an insulating effect between an upper cover of the casing and the second filter circuit board to prevent the second filter circuit board from directly contacting the upper cover to form a short circuit, so as to improve the safety of the power supply.

A motor driving device includes a mounting member including a mounting hole; a fan unit configured to be fixed to the mounting member, the fan unit including a lid disposed to cover the mounting hole; a restricting member configured to restrict movement of the lid by sandwiching the lid between the restricting member and the mounting member; and a guide mechanism configured to guide an operation of the restricting member moving relative to the lid from a non-restricting position where movement of the lid is allowed to a restricting position where movement of the lid is restricted.

A first projection and a second projection are disposed around an opening in a housing. A first fitting hole into which the first projection is to be fitted and a second fitting hole into which the second projection is to be fitted are formed around a central hole in a packing. The first projection and the second projection are respectively fitted into the first fitting hole and the second fitting hole, whereby the packing is attached to the housing. A cover to cover the opening and on an area around the opening is attached to the housing by means of a fastening member mated with the second projection with the packing placed between the cover and the housing.

The present invention relates to an energy storage device, comprising a switchgear cabinet housing in which a plurality of receiving spaces are provided, in which receiving spaces at least one control device and a variable number of electrical storage blocks are accommodated in an exchangeable manner, wherein the storage blocks can be selectively interconnected in series or in parallel and are connected to power connections by means of a current controller. Therefore, it is initially proposed to form the control device which is installed in the switchgear cabinet housing and the associated power electronics components themselves in a reconfigurable or variable manner in order to allow the controller and power electronics to be matched to another mode of operation or another application, without having to exchange the control and power electronics module and provide corresponding wiring for this purpose.

An insulated housing, in a cylindrical structure, includes an inner metal layer, an insulating layer and an outer metal coating. The insulating layer is positioned between the inner metal layer and the outer metal coating. In any end of the cylindrical structure, both a distance from the end of the inner metal layer to the end of the cylindrical structure and a distance from the end of the outer metal coating to the end of the cylindrical structure are not equal to zero, and the distance from the end of the inner metal layer to the end of the cylindrical structure is larger than the distance from an end of the outer metal coating to the end of the cylindrical structure. The inner metal layer is composed of one first metal cylinder and two second metal cylinders respectively disposed on the both ends of the first metal cylinder.

Disclosed is a power supply system, including: a high-voltage input power distribution cabinet, a high-low voltage conversion cabinet, and a low-voltage output and control cabinet, the high-low voltage conversion cabinet is provided with at least one high-voltage chamber provided with a high-voltage bus bar, at least one low-voltage chamber provided with a low-voltage bus bar, an insulating partition between the high-voltage chamber and the low-voltage chamber and a plurality of power supply modules; each of the power supply modules bridges the high-voltage and low-voltage chambers and includes a high-voltage cavity, a low-voltage cavity and an isolation unit, connecting terminals of the high-voltage and low-voltage cavities are respectively disposed corresponding to the high-voltage and low-voltage chambers and electrically connected to the high-voltage and low-voltage bus bars respectively, and the isolation unit is connected to one end of the high-voltage cavity and one end of the low-voltage cavity.

A programmable AC power distribution device includes a control circuit board disposed on a connecting plate. A fixing plate is disposed in a case. The connecting plate is connected to the fixing plate through a coupling member. Thereby, the connecting plate with the control circuit board can be disassembled only by removing the coupling member. When the control circuit board is to be reinstalled, the connecting plate can be easily fixed to the fixing plate through the coupling member. The assembly and disassembly of the control circuit board can be improved effectively, thereby greatly improving the efficiency of the check and repair of the control circuit board.