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Buchholz relay for protecting oil insulated power electric equipment

An electrical equipment, insulating technology, applied in the field of Babbitt relays, can solve the problem of not allowing regulating valves, etc., to achieve the effect of multiple operating conditions

Inactive Publication Date: 2013-03-13
COMEM SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] However, Barbetts relays designed to date do not allow the aforementioned preset thresholds for regulator valve operation and hence transformer shutdown circuit operation to exceed certain limits

Method used

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  • Buchholz relay for protecting oil insulated power electric equipment
  • Buchholz relay for protecting oil insulated power electric equipment

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] In the figure, there is shown a Barbie relay for protecting oil-insulated power electrical equipment such as a transformer, wherein the Barber relay is generally indicated by 1 .

[0035] In particular, the Buckeye relay 1 according to the invention is integrated between a transformer, not shown, and an expansion tank or oil conservator, likewise not shown.

[0036] It can be seen that the Babbitt relay 1 includes:

[0037] - a support frame 2, preferably made of plastic material, said support frame being in direct contact with the oil;

[0038] - drive means, denoted generally by 3, said drive means being coupled to the support frame 2, said drive means moving relative to said support frame;

[0039] - a switching device, generally represented by 4, said switching device is operatively connected to the driving device 3 for enabling / disabling the unillustrated alarm circuit and / or shutdown circuit of the electrical equipment;

[0040] - A regulating valve for the flow...

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PUM

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Abstract

A Buchholz relay (1) for comprising a support frame (2) in contact with the oil, drive means (3) coupled to the support frame (2), switching means (4), operatively connected with the drive means (3) and suitable for an alarm circuit and / or a shutdown circuit of the electrical equipment, a regulation valve (5) of the oil flow, coupled to the support frame (2), suitable to be affected by the oil flow in order to define a first position in which it disables the shutdown circuit and a second position in which, if the oil discharge exceeds a certain threshold, it enables the shutdown circuit. The Buchholz relay (1) also includes biasing means associated with the support frame (2) and with the valve (5) to keep the latter in the first position.

Description

technical field [0001] The invention relates to a Babbitt relay used for protecting oil-insulated power electrical equipment such as a power transformer. Background technique [0002] Oil-insulated power electrical equipment, such as transformers with insulating oil baths, is known to include a Barbie relay, which is an electrical device that functions when an abnormal gas release occurs in the transformer, or when an associated oil flow occurs, said Unusual gas release is usually a sign of a serious malfunction. [0003] The presence of gas and / or associated oil flow inside oil-insulated transformers generally indicates a fault. [0004] In some cases, the gas comes from the outside and enters the transformer through a circulation pump; in others, the gas is produced by the decomposition of insulators, liquids or solids due to overheating or arcing. [0005] Similarly, a high oil flow must be caused by a catastrophic fault with excess gas production or, in other cases, a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/55H01H36/02H01H35/40
CPCH01H36/02H01H33/555H01H35/405
Inventor 西尔维奥·达尔拉戈
Owner COMEM SPA
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