A power distribution box configured to house a plurality of electronic components is provided. The electronic components are mounted to a lower case. An upper case is mounted to the lower case and spaced apart from the lower case so as to define a storage compartment. The upper case includes a vent configured to allow heat generated by electric components to escape. In particular, the vents are registered so as to be above selective heat generating electric components.

The arrangement includes a pressure relief hatch for closing an opening in a wall in an electric cabinet, which. includes a body having an outer surface, an opposite inner surface, an outer perimeter, and a thickness. The body includes a centre portion with a first thickness, an intermediate portion with a second thickness, and an outer portion with a third thickness. The first thickness is greater than the third thickness and the second thickness decreases in a radially outward direction from the first thickness to the third thickness. A spring keeps the pressure relief hatch in a closed position in the opening during normal operation of the electric cabinet.

Disclosed is a panel board including a panel for automatically adjusting a humidity of an interior thereof, the panel board including an outer wall panel manufactured in a specific standard and a roof panel coupled to an upper side of the outer wall panel to define a roof thereof, and having a space part, in which various pieces of electric power equipment are installed, on the inner side thereof, wherein an interior and an exterior of a wall of the panel board are coated such that moisture absorption capacities of the interior and the exterior of the wall are different.

The invention provides the system supporting variable speed drive comprising a three-sided service cabinet embodiment. The cabinet comprising two heat exchange circuits limited by the basic elements of the cabinet embodiment, the first of which is configured to interact with an external environment and with the second heat exchange circuit, wherein the second heat exchange circuit which is configured without an ability to interact with the external environment includes a sealed cell for installing power electronics and the cell for installing a power connection and the cell for installing a measurement equipment. The cabinet comprising a dust and moisture filter, a plate heat exchanger, and a moisture removal device. The cabinet may be assembled with joined end-to-end metal sheets with curved joined ends which form strengthening ribs. The system supporting variable speed drive further comprising a cell for installing a passive filter or a filter compensation device or a capacitor bank preconfigured for compliance with variable speed drive and configured in such a way that it is dismountable in a form of a cabinet of the same height and depth as the cabinet of variable speed drive and closely aligned with the cabinet of variable speed drive. The cell for installing a power connection located on a side of the cell for installing a passive filter or a filter compensation device or a capacitor bank, wherein all connections between the cabinet of variable speed drive and the cell for installing a passive filter or a filter compensation device or a capacitor bank are made in the internal part of the embodiment.

An apparatus for closing a ventilation opening in a housing of a switch gear in the event of a sudden increase in pressure caused by electric arcing. The apparatus includes a frame which is adapted to be coupled to the housing of the switch gear adjacent the opening, a flap pivotally mounted at the frame, the flap being adapted to be moved from an open position in which the flap overlaps the ventilation opening keeping a gap which allows an airflow through the opening, into a closed position, in which the flap fully covers the opening and blocks the air flow, spring elastic means which urge the flap into the open position, and a retaining element which is adapted to mechanically lock the flap in the closed position after pivoting the flap from the open position into the closed position.

The invention relates to a power module (4) for a medium or high voltage converter (1), preferably a modular multilevel converter, comprising at least one power semiconductor module (7), preferably an IGBT assembly, at least one energy storage module (9), preferably a capacitor module, at least one cooling device (14), wherein the cooling device (14) is formed as a cooling plate (17) that can be run through by a coolant, in particular flown through by a cooling liquid, and the at least one power semiconductor module (7) and/or the at least one energy storage module (9) are arranged on an upper side (18) and/or bottom side (19) of the cooling plate (17), and wherein the at least the power semiconductor module (7) is connected with the cooling plate (17) in a thermally conductive manner, and wherein the cooling plate (17) is provided for load-bearing support on a rack (2) of an assigned receiving space (3) of the medium or high voltage converter (1) and comprises support surfaces (16) projecting laterally in the transverse direction (11) with respect to at least one energy storage width (21) of the energy storage module (9).

A medium-voltage switchgear system includes a three-phase circuit breaker having first, second and third single-phase vacuum interrupters connected between respective first, second and third single-phase inputs and first, second and third single-phase outputs. Magnetic actuators are connected to first, second and third single-phase vacuum interrupters, which are configured to receive an interrupt signal and in response, actuate the respective vacuum interrupter connected thereto into an open circuit condition. A controller circuit is connected to each of the first, second and third magnetic actuators and generates an interrupt signal in response to a detected single-phase overcurrent or fault on a single-phase circuit and interrupt that single-phase circuit on which the single-phase overcurrent or fault occurred and maintain power on the remaining two single-phase circuits over which a single-phase overcurrent or fault was not detected.

A multi-function cabinet housing electrical equipment. The multi-function cabinet has four compartments. Each compartment is configured to house a different type of electrical equipment. The electrical equipment may be high-voltage electrical metering and distribution components, high-voltage control electronics, battery backup, wireways, low-voltage electronics, or a combination thereof. The multi-function cabinet contains wireways. The compartments of the multifunction cabinet are accessible using doors, which are fastened by locks. The cabinet contains a ventilation system with fans, vents, and filters.

An explosion-proof structure of an electronic device includes a housing, a cover member, and an opening/closing member. The housing houses electronic components. The cover member covers a first ventilation port formed on one surface of the housing at least in a normal direction to the one surface. The opening/closing member opens and closes a second ventilation port formed between one surface and the cover member.

A split door submersible housing for an electrical distribution system includes a cabinet body defining an interior region configured to accept a component of the electrical distribution system, and a first door and a second door positioned side by side to cover an open front portion of the cabinet body. The cabinet body includes at least one opening configured to accept an electrode sealed with and electrically isolated from the cabinet body and extending through the cabinet body to establish electrical connection between a corresponding terminal of the component and an electrical distribution network. A gasket system is provided, which comprises a first gasket configured to fit on the first door and a second gasket configured to fit on the second door. The gasket system seals the first door and the second door against each other and against a corresponding surface on the cabinet body, when the first and second doors are closed and locked, so that the housing is water tight.