a power cabinet

Abstract

The invention relates to a power cabinet. Direct-current side lead-out bars of three sets of power components in a main air duct I, a main air duct II and a main air duct III on the upper portion inside a cabinet body are connected with a direct-current busbar 1C1 sleeved with a current Hall sensor; direct-current side lead-out bars of three sets of power components in a main air duct I, a main air duct II and a main air duct III on the lower portion inside the cabinet body are connected with a direct-current busbar 1D1; alternating-current side lead-out bars of two sets of power components in a main air duct I in a rear auxiliary air duct of the cabinet body are connected with an alternating-current busbar 1U1 sleeved with a current transformer through fast acting fuses respectively; alternating-current side lead-out bars of two sets of power components in the main air ducts II are connected with an alternating-current busbar 1V1 through fast acting fuses respectively; alternating-current side lead-out bars of two sets of power components in the main air ducts III are connected with an alternating-current busbar 1W1 sleeved with a current transformer through fast acting fuses respectively; because of main air duct structures, interchangeability of products is enhanced; by means of the auxiliary air duct structure, fast heat dissipation can be achieved, and input buses can be protected. Instantaneous overload of equipment capacity can reach 4500 A because of structural design of the power components.

Description

technical field [0001] The invention relates to a power cabinet, which is widely used in metallurgical industry, hoisting industry, electric locomotive and other fields, and is mainly used for the transformation and expansion of the original DC speed regulation system. Background technique [0002] At present, in the international and domestic transmission industries, most of the DC transmission drive systems adopt the scheme of restructuring and expansion. A key link of the restructuring and expansion scheme is the expansion of the armature circuit. The existing power cabinets produced by other manufacturers mostly adopt integral air duct design, which is inconvenient to install and replace components, wastes a lot of circulating air, has poor heat dissipation effect, and cannot exert the maximum capacity of electrical components. For power supply equipment, only parallel schemes can be adopted, which has disadvantages such as high cost and complex system prone to failure. ...

AI Technical Summary

Problems solved by technology

The existing power cabinets produced by other manufacturers mostly adopt integral air duct design, which is inconvenient to install and replace components, wastes a lot of circulating air, has poor heat dissipation effect, and cannot exert the maximum capacity of electrical components. For power supply equipment, only parallel schemes can be adopted, which has the disadvantages of high cost, complex system and prone to failure.

The size of the heat sink of the power component is not standard enough and the versatility is poor, and the overall weight of the profile is too light, and the heat dissipation area is small, which cannot meet the heat dissipation requirements of the thyristor

The fast fuse and the power component are set in the same air duct and there is no partition to separate them. When the fast fuse blows, it is very easy to cause arc short circuit, which is caused by fault expansion and unnecessary losses.

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