High-power sealed alternating current contactor

Abstract

The invention relates to a high-power sealed alternating current contactor. The shell of the high-power sealed alternating current contactor is fixed on a pedestal, an input terminal and an auxiliary output terminal are fixed on the shell, a main output terminal is fixed on the pedestal, and a main output stationary contact is fixed at the inner end of the main output terminal; a suction type electromagnetic mechanism is fixed on the pedestal through a bracket and positioned at the middle part in the shell, and a rectifying part is arranged on the bracket; the upper part of the moving end of the suction type electromagnetic mechanism is connected with a pushing ring, the lower part is connected with a main output moving contact, and the main output moving contact is positioned over the main output stationary contact; a coil-controlled normally closed contact and an auxiliary output normally open contact are arranged above the suction type electromagnetic mechanism and controlled through the pushing ring; and the input terminal is connected with the rectifying part, the rectifying part is connected with the suction type electromagnetic mechanism, the coil-controlled normally closedcontact is connected with the control end of the suction type electromagnetic mechanism, and the auxiliary output normally open contact is connected with the auxiliary output terminal. The invention has the characteristic of compact structure, impact resistance, large loading capability and the like and is particularly suitable for switching circuits in ships and other high-power military equipment.

Description

technical field [0001] The invention relates to a high-power sealed AC contactor. Background technique [0002] The electrical contact system of existing AC contactors generally uses relatively scattered and independent parts to realize the closing and opening of the contacts, and the stroke of the moving reed is large, and the bending deformation is large during the action, resulting in the contact reliability of the contact system. not tall. In addition, the contactor with this structure is loosely assembled, has a low service life, and has a high failure rate, which greatly restricts its application environment and cannot meet the installation and use requirements of special environments such as sealing. Contents of the invention [0003] The technical problem solved by the present invention is to design a high-power sealed AC contactor, which is a kind of AC input control, and the output main contacts are three groups of moving contacts, and the auxiliary contacts are...

AI Technical Summary

Problems solved by technology

The invention adopts a suction electromagnetic mechanism to ensure that the product has a relatively large contact pressure and impact resistance requirements; in view of the characteristics of a product with a large contact load (50A 380Va.c.), the contact system adopts a bridge-type semi-flexible contact form, Reasonable solution to contact pressure and tracking issues

The invention adds an arc shield and an insulating arc shield between groups, which effectively solves the problem of high-voltage breakdown between phases, and ensures that the contact load and life meet the design requirements; the use of glass insulation technology solves the problem of contactor sealing

Images