ENCLOSED-TYPE LOW-NOISE ELECTRO TRANSFORMING SUBSTATION Russian patent published in 2017 - IPC H01F27/33 H02B7/06 E04B1/74 

FIELD: electricity.

SUBSTANCE: electro transforming substation comprises a power electro transformer, which is composed of an active part in the form of the magnetic conductor and insulated windings that are coved by the total magnetic flux, of a structural frame and a foundation base, and active part acoustic radiation attenuation devices. The composite node members are installed in the building air cavity. The acoustic radiation attenuation devices of the power electro transformer active part is introduced by the noise limiters that are made up from the Helmholtz resonators, composed of the utilizable bottle capacities of polyethyleneterephthalate tare with the chamber and open neck parts, with fitted into it inner tubular extensions of the open neck parts that have outer and inner sections, of the predetermined dimensional specifications. The natural resonance oscillatory frequencies of the implemented Helmholtz resonators are two, or four, or six as much as the alternate current commercial frequency of the power-line, to which the power electro transformer is connected. The frequency-response tunings of the Helmholtz resonators satisfy the actual functional frequency rate of the acoustic radiation of the power electro transformer active part. The frequency-response tunings of the Helmholtz resonators are defined by the relevant implementation of its composite members that are composed of the transformable modifiable utilizable bottle capacities of polyethyleneterephthalate tare - 16, where the capacities air volume is equal to the chamber part cavity space, the capacities physical length and passage area are equal to the open neck part. These parameters are formed by virtue of the implemented inner tubular extensions that are of the predetermined dimensional specifications and are fitted into the open neck parts of the utilizable bottle capacities of the polyethyleneterephthalate tare. These parameters are also calculated due to the air temperature, which is settled in the air cavity of the building.

EFFECT: diminution in value.

14 cl, 37 dwg