Heat dissipating rack for solid-sealed polar pole

Abstract

The invention relates to switch equipment parts in power systems, particularly to a heat dissipating rack for a solid-sealed polar pole. The heat dissipating rack for the solid-sealed polar pole comprises a heat dissipating rack body. The heat dissipating rack body comprises a bottom plate in a door-shaped structure and heat dissipating fins arranged on the bottom plate, wherein the heat dissipating fins are composed of bar-shape-structured heat dissipating fins and wave-shape-structured heat dissipating fins; the back surface of the bottom plate is provided with a connecting seat connected with the solid-sealed polar pole; the connecting seat is provided with a threaded hole; the four corners of the bottom plate are provided with sealing members. The heat dissipating rack for the solid-sealed polar pole is simple in structure and reasonable in design, obtains good thermal conductivity and can cool cathode spots and reduce metal vapor concentration, thereby ensuring normal on and off of a vacuum arc-extinguishing chamber.

Description

technical field [0001] The invention relates to spare parts of switchgear in a power system, in particular to a cooling frame used for solid sealing poles. Background technique [0002] Vacuum interrupter, also called vacuum switch tube or vacuum bubble, is the core device of vacuum circuit breaker (switch), and is installed in a solid-sealed pole. It uses a pair of electrodes (contacts) and other parts sealed in a vacuum to realize the closing or breaking of the circuit with the help of the excellent insulation and arc extinguishing performance of the vacuum. After cutting off the power supply, it can quickly extinguish the arc and suppress the current vacuum. device. [0003] In the process of breaking the current in the vacuum interrupter, the welding of the contacts in the vacuum switch is a prominent problem. The welding between the vacuum contacts is almost inevitable, so the welding force between the contacts can only be required to be not too large. After the weldi...

AI Technical Summary

Problems solved by technology

Therefore, the arc spot melting zone on the contact surface has a small area, shallow depth, and small thermal inertia. The current is often as high as 2000A. The passage of a large current will inevitably cause the temperature of each contact in the vacuum interrupter to rise, which seriously affects the service life of the vacuum interrupter and the circuit breaker.

Images