A transformer tank for a shell type transformer, shell type transformer and method for clamping a magnetic circuit of a shell type transformer

PT4064303TActive Publication Date: 2026-06-05HITACHI ENERGY LTD
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Patent Information

Authority / Receiving Office
PT · PT
Patent Type
Patents
Current Assignee / Owner
HITACHI ENERGY LTD
Filing Date
2021-03-22
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

There is a need for a reliable and stable transformer tank for shell type transformers that allows for precise setting of clamping force on the magnetic circuit, as existing solutions fail to provide consistent and adjustable clamping mechanisms.

Method used

A transformer tank with a clamping arrangement comprising a beam and a movable plunger, where the clamping force is adjustable by controlling the position of the plunger relative to the beam, utilizing a screw device to exert a controlled torque and achieve a preset clamping force on the magnetic circuit.

Benefits of technology

This solution enables reliable and stable clamping of the magnetic circuit, allowing for precise control of clamping forces, enhancing the transformer's reliability and ability to withstand short circuits by ensuring a stiff and rigid core.

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Abstract

A transformer tank for a shell type transformer, shell type transformer and method for clamping a magnetic circuit of a shell type transformer A transformer tank for a shell type transformer (100) comprises: - a wall (111), the wall (111) surrounding a tank interior (112), - a clamping arrangement (120) for exerting a clamping force (121) on a magnetic circuit (101) of the shell type transformer (100), - wherein the clamping arrangement (120) comprises: - a beam (122) fixed on the wall (111), - a plunger (123), the plunger (123) comprising a first axial end (124) configured to exert the clamping force (121) on the magnetic circuit (101), wherein the plunger (123) is movable with respect to the beam (122) along its longitudinal axis (126) and a value of the clamping force (121) is settable depending on the position of the plunger (123) relative to the beam (122).
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