Waterproof open current transformer and sealing method

Abstract

The invention discloses a waterproof open current transformer and a sealing method. The waterproof open current transformer comprises a shell I and a shell II, wherein the shell I and the shell II are hinged; an iron core I is arranged in the shell I; an iron core II is arranged in the shell II; two ends of the iron core I are provided with at least one sealing ring I respectively in a loop overlapping manner; the outer side of each sealing ring I is provided with a sealing sleeve in the loop overlapping manner; the sealing sleeves are connected onto the shell I; an elastic sheet is arranged between the bottom of the iron core I and the shell I. The two ends of the iron core I pass through the sealing sleeves and the sealing rings I in the sealing sleeves to be closely abutted with two ends of the iron core II respectively; the elastic sheet tightly presses the iron core I; under the action of elastic force, the iron core I can be furthest combined with two sections of the iron core II with equal tightness; the combination is closer; the two ends of the iron core II pass through a sealing cover; due to the sealing action of the sealing rings I, the sealing sleeves and sealing rings II, the position where the iron core I and the iron core II are combined is sealed, and is isolated from an external environment; the damage of the external environment to an iron core section is prevented; a joint of the iron core I and the iron core II is prevented from rusting; the service life of the iron core is guaranteed.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a waterproof open-type current transformer and a sealing method. Background technique [0002] Current transformer is one of the commonly used devices in electrical power distribution, monitoring, protection, and measurement systems. It is used to convert large current and high voltage signals in the circuit into small current and low voltage signals that are completely isolated from the converted circuit. In order for secondary instruments and equipment to monitor, measure or control the high voltage and high current in the circuit. The current transformer plays the role of transforming current and electrical isolation, which is convenient for signal processing of secondary equipment and instruments and avoids the danger of direct measurement lines. [0003] When the traditional current transformer is applied to the renovation project of the existing power distribution system,...

AI Technical Summary

Problems solved by technology

However, due to the fact that the two parts of the iron core and the corresponding shell are relatively fixed and cannot move freely within a certain range, the tightness of the joint surface of the two iron cores is limited by the nearby fastening bolts or other fastening structures, which cannot be guaranteed to be consistent, so that the mutual inductance After the device is fastened, the accuracy becomes poor, the consistency cannot be guaranteed, and even the product cannot work normally due to insufficient fastening

And due to the use of bolts for fastening, if the bolts are not fastened in place, the effect of the sealing structure cannot be guaranteed, and the purpose of waterproofing cannot be achieved

Due to the inherent defects of its structure, the current waterproof open type current transformer has not been widely used

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