Transformer iron core grounding lead structure

Abstract

The invention relates to the technical field of a power transformer, and particularly relates to a transformer iron core grounding lead structure. The transformer iron core grounding lead structure comprises a base, an insulating terminal plate and a protection cover; the base comprises side walls and an end cover; multiple terminals are arranged on the insulating terminal plate; a grounding wireand a lead are arranged in the base; and a measurement cable is arranged in the protection cover. The transformer iron core grounding lead structure does not need a sleeve and a copper bar, so that the manufacturing cost is lowered; the insulating terminal plate can be sealed conveniently, without causing oil seepage and leakage easily; and by virtue of the protection cover, complete protection performance is provided, and damage caused by external force can be avoided effectively, so that the transformer iron core grounding lead structure can be widely applicable to various power transformers.

Description

technical field [0001] The invention relates to the technical field of power transformers, in particular to a transformer core grounding lead structure. Background technique [0002] In a transformer, windings and iron cores are the main components for transmitting and transforming electromagnetic energy. Therefore, the safety of windings and iron cores is the key to ensure the reliable operation of transformers. During the operation of the transformer, the electric field formed between the charged winding and the lead wire and the oil tank is an inhomogeneous electric field, and the iron core and other metal components are in this electric field. Because the positions of the iron core and other metal components are different, the potentials are also different. When When the potential difference between the two points reaches the point where the insulation between them can be broken down, a spark discharge will be generated. Over time, the solid insulating parts of the trans...

AI Technical Summary

Problems solved by technology

During the operation of the transformer, the electric field formed between the charged winding and the lead wire and the oil tank is an inhomogeneous electric field, and the iron core and other metal components are in this electric field. Because the positions of the iron core and other metal components are different, the potentials are also different. When When the potential difference between two points reaches the insulation breakdown between them, spark discharge will be generated, which will gradually damage the solid insulation parts of the transformer and lead to accidents in the long run.

[0003] At present, in order to avoid the above situation, the transformer core and large metal parts are usually reliably grounded through the oil tank. In the conventional structure, the core grounding is usually led out through the bushing, and the grounding is through the external copper bar. The manufacturing cost is high, and the transformer is transported. During the operation, the casing is prone to oil leakage and damage to the porcelain sleeve

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