Pulling plate structure for electric transformer core

Abstract

The invention provides a pulling plate structure for an electric transformer core. A pulling plate is a rectangular steel plate, at least two long-bar-shaped notches are formed in the center of the pulling plate in the vertical length direction of the pulling plate, the sizes of the notches are equal, and the notches are symmetrically distributed in the vertical length direction of the pulling plate. Due to the design of the notches of the pulling plate of the core, the eddy-current loss can be obviously reduced, and local overheat can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of transformers, and in particular relates to an iron core drawing plate structure of a power transformer. Background technique [0002] In recent years, my country's power industry has developed rapidly, and the short-circuit capacity of the power system has become larger and larger. In order to control the short-circuit current when a short-circuit fault occurs, the design requires that the impedance voltage value of the power transformer in the system greatly exceed the value specified in the national standard. Between 50% and 100%; the effect it brings is the increase of the leakage magnetic field of the transformer, so that the control of the eddy current loss value of the transformer's internal winding, clip, pull plate and oil tank wall and whether there will be local overheating are put forward. Higher requirements to ensure the safe operation of transformers. [0003] The magnitude of the leakage mag...

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Problems solved by technology

For the above-mentioned influencing factors, this patent does not provide a corresponding solution

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