Solid-sealed polar pole

Abstract

The present invention discloses a solid-sealed polar pole. The solid-sealed polar pole comprises a shell, a vacuum arc-extinguishing chamber, an outgoing line conducting rod, a current sensor / currenttransformer, a first voltage sensor, a second voltage sensor, an insulating pull rod assembly, an electric connection assembly and a shielding assembly, the current sensor / current transformer is coaxial with the outgoing line conducting rod so as to monitor a current signal; the first voltage sensor and the second voltage sensor are respectively arranged at the movable end and the static end of the vacuum arc-extinguishing chamber and are used for monitoring voltage signals on two sides of a fracture of the vacuum arc-extinguishing chamber; and the shielding assembly is arranged on the periphery of the vacuum arc-extinguishing chamber and / or the wire outlet conducting rod so as to shield signal interference on the first voltage sensor, the second voltage sensor and / or the current sensor / current transformer. By arranging the shielding assembly, the influence of the current sensor / current transformer on the electric field of the conductive part at the upper part of the insulating pull rod is reduced, the influence of the large electric field of the voltage sensor in the opening state of the vacuum arc-extinguishing chamber on the partial discharge of the solid-sealed polar pole is also reduced, and the insulating strength is improved.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a solid-sealed pole. Background technique [0002] At present, the electric power industry has more and more stringent partial discharge requirements for the primary and secondary fusion of pole-mounted switches. In the outdoor solid-sealed pole of primary and secondary deep fusion, due to the introduction of current sensors / current transformers, the upper conductive part of the insulating rod The electric field is more concentrated. In addition, due to the introduction of the voltage sensor for monitoring the static terminal voltage signal of the vacuum interrupter, the strong electric field generated by the fracture voltage in the open state of the vacuum interrupter will affect the electric field of the solid-sealed pole. [0003] The concentration of the electric field will cause the insulation performance of the solid-sealed electrode to decline, especially in th...

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Problems solved by technology

In addition, due to the introduction of the voltage sensor for monitoring the static terminal voltage signal of the vacuum interrupter, the strong electric field generated by the fracture voltage in the open state of the vacuum interrupter will affect the electric field of the solid-sealed pole

[0003] The concentration of the electric field will cause the insulation performance of the solid-sealed electrode to decline, especially in the partial discharge index; in addition, the concentration of the electric field will stimulate the air ionization and accelerate the aging of the insulating material. The signal causes the sensor signal to be aggravated by the interference environment, and the aging of the insulating material causes the embedded sensor to break down and cause the sensor to burn out and fail

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