CN2355424Y

CN2355424Y - A.C. contractor with arc extinction by feedback cyclic current

Info

Publication number: CN2355424Y
Application number: CN 98239790
Authority: CN
Inventors: 于永学; 于喜凤; 王广毅; 阎占清; 孙占军; 孙金石
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-25
Filing date: 1998-12-25
Publication date: 1999-12-22
Anticipated expiration: 2008-12-25

Abstract

The utility model relates to an AC contractor with arc extinction by feedback cyclic current, which belongs to the class of AC contractors for electric appliances. The utility model is composed of a bottom board, a quadrate assembling housing, three static contacts installed on the left side of the upper end of the housing, three static contacts installed on the right side of the upper end of the housing, an arc extinguishing cover at the upper end of the housing, two sets of normally closed auxiliary contacts and two sets of normally open auxiliary contacts installed on the housing, a sliding frame and a moving magnet which are installed in the housing, a coil and a static magnet which are installed in the housing, and three sets of moving contacts installed at the upper end of the sliding frame. The six moving contacts and a silver contact sheet on a lower end surface are respectively provided with a center hole, and the six static contacts are respectively provided with a shoulder hole; an insulating bush is sheathed in the upper end opening of each of the static contacts. The moving contacts and the static contacts with the structure have the advantages of feedback, automatic circulating current, automatic arc extinction, little possibility of heating and burnt damage for the moving contacts and the static contacts, and long service life.

Description

Feedback circulation blow-out A.C. contactor

The utility model belongs to electrical equipment A.C. contactor class.

Existing A.C. contactor, its structure for by the arc-extinguish chamber of three fixed contacts on base plate, square assembling shell, three fixed contacts that are contained in left side, housing upper end and right side, housing upper end, be contained in two groups of normally closed auxiliary contacts on the housing and two groups and often drive auxiliary contact, be contained in travelling carriage and moving magnet, coil and static magnet in the housing, be contained in that three groups of moving contacts of travelling carriage upper end form.This A.C. contactor, because three fixed contacts on three fixed contacts of housing upper left side and right side all are the plane contact structures with three groups of moving contacts on the travelling carriage, under the rated load condition, very easily produce the very big electric arc of harm, make dynamic/static contact easily generate heat, easily burn feedback.

The purpose of this utility model is: provide a kind of dynamic/static contact to be difficult for heating, be difficult for burning the circulation blow-out A.C. contactor of feedback.

The technical solution of the utility model is: based on by the arc-extinguish chamber of three fixed contacts on base plate, square assembling shell, three fixed contacts that are contained in left side, housing upper end and right side, housing upper end, be contained in two groups of normally closed auxiliary contacts on the housing and two groups and often drive auxiliary contact, be contained in travelling carriage and moving magnet, coil and static magnet in the housing, be contained in three groups of A.C. contactors that moving contact is formed of travelling carriage upper end; The silver-colored contact of six moving contacts and lower surface has centre bore, and six fixed contacts have shoulder hole, are with insulating case in the upper port of each fixed contact.

A.C. contactor of the present utility model, dynamic/static contact have feedback, from the feature of circulation, self arc, have be difficult for heating, be difficult for burning feedback, safe and reliable, good effect that the life-span is long.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structure and the installation diagram (amplification) of dynamic/static contact of the present utility model.

Drawing explanation and embodiment are described below: 1 is base plate, the 5th among the figure, square assembling shell, is fixed with three fixed contacts on the left of housing 5 upper ends, the right side also is fixed with three fixed contacts 10, and three fixed contacts of every side are connected to input terminal 16 and lead-out terminal 10 respectively.The upper end of housing 5 is fixed with arc-extinguish chamber 15.Be equipped with two groups respectively in the front and back of housing 5 side and often open auxiliary contact 17 and two groups of normally closed auxiliary contacts 18.A travelling carriage 9 is arranged in the slideway 8 in housing 5.Be fixed with moving magnet 7 on the travelling carriage 9; Four jiaos of travelling carriage 9 by four springs 4 be bearing in coil 2 above, four jiaos of the bottom surfaces of coil 2 are bearing on the base plate 1 by four springs 4, and static magnet 3 is arranged above the base plate 1.The 19th, two binding posts of coil 2,14 is three fixedly square frames, 13 is braces of two moving contacts 12, is flexure strip 21 above the brace 13, and each fixedly encloses a spring and brace 13 and flexure strip 21 solid on the entablature of travelling carriage 9 respectively in the square frame 14.After coil 2 energising, moving magnet 7 and travelling carriage 9 are inhaled to move down, and three moving contacts 12 that brace 13 moved down make respectively every side contact the connection circuit with following fixed contact 20.A.C. contactor of the present utility model, be on the basis of the A.C. contactor of said structure, the silver-colored contact of six moving contacts 12 and lower surface is processed with centre bore, and six fixed contacts 11 are processed with shoulder hole, are with insulating case 20 in the upper port of each fixed contact 11.Owing to the change of dynamic/static contact 12 and 11 shapes and structure, performance also improves a lot, and has feedback, is difficult for heating, is difficult for the effect that burning is presented, service time is long from circulation, self arc, dynamic/static contact.

Claims

1, a kind of feedback circulation blow-out A.C. contactor is by the arc-extinguish chamber of three fixed contacts on base plate, square assembling shell, three fixed contacts that are contained in left side, housing upper end and right side, housing upper end, be contained in two groups of normally closed auxiliary contacts on the housing and two groups and often drive auxiliary contact, be contained in travelling carriage and moving magnet, coil and static magnet in the housing, be contained in that three groups of moving contacts of travelling carriage upper end form; It is characterized in that:

The silver-colored contact of a, six moving contacts and lower surface has centre bore;

B, six fixed contacts have shoulder hole; Be with insulating case in the upper port of each fixed contact.