Rapid box type single-pole vacuum contactor

Abstract

The invention discloses a rapid box type single-pole vacuum contactor which comprises an insulation shell, a vacuum switching tube, two electric connection terminals, an insulation pull rod, a lever, an opening mechanism and a closing mechanism, wherein the vacuum switching tube is arranged in the shell, the two electric connection terminals are arranged on the shell and connected with two electrodes of the vacuum switching tube respectively, the insulation pull rod is arranged in the shell and connected with a moving contact of the vacuum switching tube, the lever is used for driving the insulation pull rod to perform opening and closing actions, the opening mechanism is used for driving the lever to perform the opening action, and the closing mechanism is used for driving the lever to perform the closing action. The closing mechanism comprises a driving lever and a closing driving rod, wherein the driving lever is rotatably arranged in the shell and used for driving the lever to rotate, the closing driving rod is used for driving the driving lever to rotate, and the end, far away from the driving lever, of the closing driving rod extends out of the shell to be served as a manual closing button; the opening mechanism comprises an electromagnetic tripping mechanism and an opening driving rod, wherein the electromagnetic tripping mechanism is arranged in the shell and used for driving the lever to rotate, the opening driving rod is used for triggering the electromagnetic tripping mechanism to work, and the outer side end of the opening driving rod extends out of the shell to be served as a manual opening button. The rapid box type single-pole vacuum contactor is high in closing speed and capable of meeting the requirements of grid-connected power generation of novel electricity equipment.

Description

technical field [0001] The invention belongs to the technical field of vacuum contactor structure design, and in particular relates to a fast box-type single-pole vacuum contactor. Background technique [0002] At present, in the power system, the high, medium and low voltage contactors and circuit breakers all use electromagnetic opening and closing. Arc extinguishing, the vacuum tube is composed of self-closing force and contact pressure spring. The vacuum contactor used in conventional electric power is designed with contact pressure spring and opening reaction force spring as the design idea, so the designed coil and magnet are relatively large. , the vacuum tube can be pushed to the closing position, because the pushing force is greater than the sum of the self-closing force of the vacuum tube, the contact pressure elastic force and the reaction spring force. The larger the coil, the longer the closing time, because the electromagnet coil has inductance, the size of th...

AI Technical Summary

Problems solved by technology

The contactor is the key component of its grid connection, so the requirement for the closing time of the contactor is extremely high, which must be controlled below 3m / s, which cannot be achieved by conventional contactors

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