Filter capacitors with explosion-proof device

Abstract

The invention relates to a filtering capacitor equipped with an explosion-proof apparatus. The filtering capacitor comprises a shell, a capacitor core group, a cover board, a first electrode electrically connected with the capacitor core group, a second electrode electrically connected with the capacitor core group, insulating oil and the explosion-proof apparatus, wherein the explosion-proof apparatus comprises a pressure switch and an alternating current contactor; a drainage tube is arranged at the bottom of the pressure switch; a downwardly convex film sheet is arranged at the bottom of the drainage tube; the alternating current contactor comprises a coil, a first contact switch and a second contact switch; the circuit where the coil is located is connected with the circuit where the pressure switch is located in series; the circuit where the first contact switch is located is connected with the first electrode in series; and the circuit where the second contact switch is located is connected with the second electrode in series. The filtering capacitor equipped with the explosion-proof apparatus is simple to overhaul and troubleshoot, convenient to use, good in explosion-proof effect, high in safety, and high in application value.

Description

technical field [0001] The invention relates to a filter capacitor with an explosion-proof device, belonging to the technical field of capacitors. Background technique [0002] The filter capacitor is an energy storage device that is connected in parallel at the output end of the rectifier power supply circuit to reduce the ripple coefficient of the AC pulsation and smooth the DC output. In electronic circuits that convert AC to DC power supply, the filter capacitor not only stabilizes the DC output of the power supply, reduces the influence of alternating pulsation ripples on the electronic circuit, but also absorbs current fluctuations generated during the working process of the electronic circuit and passes through the AC. The interference of the power supply in series makes the working performance of the electronic circuit more stable. [0003] The main structure of the existing filter capacitor is: shell, capacitor core group, cover plate, electrode and castor oil. Due...

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Problems solved by technology

[0003] The main structure of the existing filter capacitor is: shell, capacitor core group, cover plate, electrode and castor oil. Due to the large capacity of the filter capacitor, the capacitor core group is composed of many capacitor cores. If the capacitor core group fails, it will generate A large amount of heat will cause the temperature rise of castor oil, causing the shell to bulge, and the capacitor is prone to explosion, which is low in safety

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