Intelligent protection device for low-voltage overload of distribution transformer

Abstract

The invention provides an intelligent protection device for low-voltage overload of a distribution transformer, which comprises a first assembly steel plate, a second assembly steel plate, a dampproofplate, a waterproof plate, a housing, a storage battery, a switch, a transformer, a thermal relay, an auxiliary sleeving protective cover frame structure, a wiring dustproof head structure, a digitaldisplay thermometer, an adjustment mounting frame structure and an auxiliary cooling protective frame structure, wherein the second assembly steel plate is welded on the lower part of the front surface of the first assembly steel plate; and the dampproof plate and the waterproof plate are mutually glued and respectively glued on the rear wall of the first assembly steel plate. The arrangement ofthe auxiliary sleeving protective cover frame structure is convenient for sleeving a sleeving shell on the front part of the first assembly steel plate and the lower part of the second assembly steelplate, a dust protection effect is played on the transformer and the thermal relay accordingly, and the protection effect is improved.

Description

technical field [0001] The invention belongs to the technical field of overload protection, in particular to a low-voltage overload intelligent protection device for distribution transformers. Background technique [0002] In order to reduce the design cost of the transformer unit in the existing distribution transformer, the low-voltage side of the 10kV distribution transformer is usually not equipped with a separate circuit breaker. When the low-voltage side is short-circuited, the fuse (low-voltage insurance) will be blown to remove the fault and lose all loads. ; But when only fuses are used, if there is an overload on the low-voltage side, the distribution transformer will heat up very seriously, which will endanger the insulation protection layer of the distribution transformer, and even cause the distribution transformer to spray oil and explode. , Due to the use of fuses and bonuses, the phenomenon of burning distribution transformers often occurs. [0003] However,...

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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a distribution transformer low-voltage overload intelligent protection device to solve the problem that the existing distribution transformer low-voltage overload intelligent protection device has a single protection mode and poor effect, and dust is easy to enter the wiring and affect the use. The function of easy adjustment and installation and the problem of not having the function of heat dissipation protection

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