Abstract: A noise/vibration reduction device for transformers mounts on an inner surface of a tank side wall of a transformer tank having an internal space, the tank side wall defining an exterior of the tank. The device includes multiple through hole plates on the tank side wall and multiple support members located between adjacent plates and between one plate and the tank side wall. The support members separate the plates to define spaces including a first space between a first and second plate, a second space between the second and third plate, and a third space between the third plate and the tank side wall. The plates include first, second, and third through hole plates having corresponding through holes with different specifications, including different hole diameters, hole lengths, and distances between adjacent holes for different noise frequencies.

Abstract: The present disclosure provides a noise/vibration reduction device for transformers. An inner space 12 may be formed inside a tank 10 constituting the exterior of a transformer. The noise/vibration reduction device 20 may be installed on inner surfaces of tank side walls 14 constituting the outer surfaces of the tank 10. The reduction device 20 may include a plurality of support members 26, 28, 30 installed between a plurality of through hole plates 32, 34, 36, whereby a first space 38, a second space 40, and a third space 42 may be formed between the through hole plates 32, 34, 36 and the tank side walls 14. A first through hole 32?, a second through hole 34?, and a third through hole 36? may be formed in the through hole plates 32, 34, 36, respectively. By varying a diameter (D) and a length (T) of the through holes 32?, 34?, 36? and a distance (L) between the through holes 32?, 34?, 36?, noise having different frequencies may be removed from each of the through hole plates 32, 34, 36.