The present disclosure relates to an arc ventilation system of a distributing board, and more particularly, to an arc ventilation system of a distributing board to minimize an arc flowing forward to prevent damage. In the arc ventilation system of a distributing board in which a plurality of compartments are provided, a first compartment accommodating an electric power device which can be drawn in or out, among the plurality of compartments, comprises an arc blocking part blocking a space between the electric power device and the first compartment at an operation position of the electric power device.

A power distribution cabinet is disclosed which includes multiple internal compartments for separating and channeling hot air generated by high heat generating components out of the cabinet without coming into contact with more heat sensitive components. The cabinet includes a baffle structure which forms an internal wall within the cabinet, which helps to form a high heat compartment and an upper compartment. The high heat compartment houses a heat generating component. Cool air is allowed to flow into a lower area of the cabinet and into the high heat compartment, and is also channeled into the upper compartment where at least one other heat generating component is located. The baffle structure channels hot air formed within the high heat compartment out toward a rear area of the equipment cabinet, while also helping to channel warm air created within the upper compartment through a top panel of the cabinet.

A low and medium voltage electrical enclosure comprising a supporting structure which defines an internal space delimited by walls forming one or more compartments housing one or more electrical apparatuses. At least one of said walls is provided with one or more venting openings that put into communication said internal space with the outside of said low voltage electrical enclosure and/or one of said compartments with a second compartment. The venting openings are provided with a cover closing a corresponding venting opening in a first—closed—operating condition at first predetermined temperatures and the enclosure is provided with an actuating device adapted to open said cover in a second—open—operating condition at second predetermined temperatures. The actuating device comprises an actuating mechanism having a Shape Memory Alloy-based (SMA-based) actuating element having a first dimension at said first predetermined temperatures reversibly changeable into a second dimension at said second predetermined temperatures, the reversible change of dimension of said SMA-based actuating element from said first dimension to said second dimension determining the reversible movement of said cover from said first—closed—operating condition to said second—open—operating condition, and vice-versa.

A panelboard assembly for a harsh and/or hazardous environment is provided. The panelboard assembly includes a core assembly. The core assembly includes a main breaker assembly configured to be electrically connected to a power supply, and a branch breaker assembly electrically connected to the main breaker assembly and configured to be electrically connected to one or more loads, and a power distribution heatsink assembly. The power distribution heatsink assembly includes an electrically-conductive heatsink having a first end and an opposing second end, the first end electrically connected to the core assembly and an electrically-nonconductive isolator electrically insulating the heatsink.

A cooling system for a medium voltage switchgear includes a conductor, a fluid conduit, and an insulator, wherein, the conductor extends in a longitudinal axis, wherein, the conductor is configured to carry electrical current in the longitudinal axis direction, wherein a first part of the fluid conduit is located around an outer surface of the conductor and extends around the longitudinal axis, wherein, a second part of the fluid conduit is connected to the first part of the fluid conduit and extends substantially perpendicularly to the longitudinal axis, wherein the insulator is located around the conductor at the position of the fluid conduit and covers the first part of the fluid conduit, and wherein the cooling system is configured such that a fluid can flow into the second part of the fluid conduit and from the second part of the fluid conduit into the first part of the fluid conduit.

A cooling system for a medium voltage switchgear includes a conductor, a fluid conduit, and an insulator, wherein, the conductor extends in a longitudinal axis, wherein, the conductor is configured to carry electrical current in the longitudinal axis direction, wherein a first part of the fluid conduit is located around an outer surface of the conductor and extends around the longitudinal axis, wherein, a second part of the fluid conduit is connected to the first part of the fluid conduit and extends substantially perpendicularly to the longitudinal axis, wherein the insulator is located around the conductor at the position of the fluid conduit and covers the first part of the fluid conduit, and wherein the cooling system is configured such that a fluid can flow into the second part of the fluid conduit and from the second part of the fluid conduit into the first part of the fluid conduit.

A control method includes supplying, by a second cooling apparatus, air at a first airflow rate to a plurality of computers each of which provides a first cooling apparatus; acquiring information on power consumption of the plurality of first cooling apparatuses and power consumption of the second cooling apparatus; supplying, by the second cooling apparatus, air at a second airflow rate, having a value obtained by changing the first airflow rate by a predetermined amount to the plurality of computers; acquiring information on the power consumption of the plurality of first cooling apparatuses and the power consumption of the second cooling apparatus; and changing an airflow rate of the second cooling apparatus by the predetermined amount, based on a comparison result between a changed amount of the power consumption of the plurality of first cooling apparatuses and a changed amount of the power consumption of the second cooling apparatus.

An airflow management system that can be fitted to an electrical cabinet intended to accommodate electrical devices in the internal volume thereof, the system comprising: a casing comprising at least one air input intended to be placed in communication with the internal volume of the electrical cabinet, at least two air outputs and at least one principal throat arranged to connect the air input to the two air outputs, a switch device arranged inside said principal throat, between the first air output and the second air output, the switch device comprising movable flaps that can be controlled between a first position in which the air input communicates solely with the first air output and a second position in which the air input communicates at least with the second air output.

An uninterruptible power supply device includes a housing having a rectangular parallelepiped shape, a plurality of units vertically stacked and accommodated in housing, and a fan unit having a plurality of fans aligned on an upper surface of housing. Each of the upper surface and the lower surface of housing is formed with an opening through which a wire is led into housing.

A pressure relief device for an explosion-proof housing. The pressure relief device has a lamellae arrangement having a plurality of lamellae. The lamellae are arranged in a transverse direction with distance to one another and thereby limit flow channel between two lamellae respectively. Each flow channel establishes a flow connection between a first opening and a second opening of the lamellae arrangement that are arranged with distance to one another in flow direction. Each flow channel has a non-straight preferably meandering or wave-shaped extension between the first opening and the second opening and can be flameproof as an option. Water drops that accumulate inside the flow channel are retained due to the contact with the two adjacent lamellae due to adhesion forces. In doing so, the pressure relief device is configured as protection against throughflow of water without additional measures.