Fixed improved structure of vacuum tube of alternating current vacuum contactor

Abstract

The invention discloses a fixed improved structure of a vacuum tube of an alternating current vacuum contactor. The alternating current vacuum contactor is composed of an insulation frame, vacuum arc extinguishing equipment, an electromagnetic system, a transmission mechanism, an auxiliary switch system, a wire connecting terminal and a base, wherein, the vacuum arc extinguishing equipment comprises a vacuum tube and a current-conducting plate; the vacuum tube is fixedly embedded in a groove at the upper end of the insulation frame; one end of the vacuum tube is connected with the transmission mechanism; the other end of the vacuum tube is connected with the current-conducting plate; and the side of the current-conducting plate is fixed on the other end of the vacuum tube through an embedded bracket, thus simplifying the structure of the current-conducting plate, and enhancing the reliability of the fixed structure.

Description

technical field [0001] The invention relates to a vacuum contactor, in particular to an improved structure for fixing a vacuum tube of an AC vacuum contactor. Background technique [0002] Like ordinary AC contactors, vacuum contactors are also a kind of mechanical switch, that is, the connection and disconnection of the circuit is realized through the mechanical movement of the contact. The difference is that the contacts of the vacuum contactor are sealed in a vacuum (called a vacuum interrupter or a vacuum switch tube), and the vacuum medium with excellent performance is used as a means of insulation isolation and arc extinguishing, so it has a high working voltage and high combustion efficiency. The advantages of short arc time, less electrical wear on the contact, and no oxidation on the contact surface; CKJ5 series, CKJ8 series, CKG3 series, CKG4 series, etc. are widely used at present; most of the operating mechanisms of vacuum contactors use electromagnets, and the a...

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Problems solved by technology

The difference is that the contacts of the vacuum contactor are sealed in a vacuum (called a vacuum interrupter or a vacuum switch tube), and the vacuum medium with excellent performance is used as a means of insulation isolation and arc extinguishing, so it has a high working voltage and high combustion efficiency. The advantages of short arc time, less electrical wear on the contact, and no oxidation on the contact surface; CKJ5 series, CKJ8 series, CKG3 series, CKG4 series, etc. are widely used at present; most of the operating mechanisms of vacuum contactors use electromagnets, and the armature The movement of the switch drives the contact in the switch tube, and the electromagnet is controlled by a low-voltage, small-capacity power supply; most vacuum contactors have a number of auxiliary contacts, which are driven by the same mechanism as the main contact for control The system provides signals, and the various series of vacuum contactors widely used at present generally have the following problems: the vacuum tube fixing structure is complicated, the volume is large; the installation is inconvenient, and the structural cost is relatively high

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