An insulator core cavity sealing device and a current sensor/transformer

Abstract

The invention relates to an insulator core chamber sealing device and a current sensor / transformer with the same. The insulator core chamber sealing device is used for sealing an insulator core chamber inserted with an optical fiber, and the insulator core chamber is filled with fluid or semi-fluid insulating liquid. The device comprises a waterproof connector, a sleeve, a sleeve cap and filler, the waterproof connector is in butt joint with a flange at the end of an insulator, the sleeve is inserted into the waterproof connector and clamped with the waterproof connector, holes allowing the optical fiber to penetrate are formed in end faces of both sides of the sleeve, the filler is arranged in the sleeve, fixes the optical fiber in the sleeve and functions in sealing, the sleeve cap is mounted at the tail end of the sleeve, and a hole allowing the optical fiber to penetrate is formed in the end face of the sleeve cap. The device can achieve sealability of the fluid / semi-fluid insulating liquid in the insulator core chamber for penetration of the optical fiber to further guarantee normal operation of a power grid, and has the advantages of simple structure, low processing cost, easiness in operation, high efficiency, safety and the like.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a sealing device for sealing an insulator core cavity in a current sensor or a current transformer and a current sensor or a current transformer using the sealing device. Background technique [0002] The current sensor / transformer (abbreviated as CT) is an important device for relay protection and energy metering in the power system. It is used to measure the current in transmission and send the measured current to the measuring instrument and relay protection device. Its long-term stability, reliability, and security are closely related to the safe and stable operation of the power system. Due to some insurmountable difficulties in principle, such as ferromagnetic resonance, magnetic saturation, and limited frequency band, traditional electromagnetic transformers have potential safety hazards when operating at high voltage levels. The optical current transformer bas...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the insulator in the current sensor / transformer is sealed with colloid and has potential safety hazards, but it is difficult to seal when filled with fluid / semi-fluid insulating liquid, and provides a new type of insulator core cavity sealing device, which can Solve the tightness of fluid / semi-fluid insulating liquid in the core cavity of the insulator that passes through the optical fiber, and further ensure the normal operation of the power grid, and has the advantages of simple structure, low processing cost, easy operation, high efficiency, and safety.

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