CN2919513Y

CN2919513Y - Phase-defect protection AC contactor

Info

Publication number: CN2919513Y
Application number: CN 200620021312
Authority: CN
Inventors: 张怀发
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-24
Filing date: 2006-07-24
Publication date: 2007-07-04
Anticipated expiration: 2016-07-24

Abstract

The utility model relates to a phase-lacking protection AC contactor consisting of a housing (1), a primary coil arranged inside the housing (1), an iron core (3) of the primary coil, a main contact (4), a constantly-opening auxiliary contact(5), a secondary contact(6), a secondary iron core (7) of the secondary coil and a constantly-opening contact (8). The primary coil (2) and the secondary coil (6) are respectively covered on a fixed iron core (31) and a fixed iron core (71). A moveable contact (41) of the primary contact and the moveable contact (51) of constantly-opening auxiliary contact (5) are connected with the moveable iron core (32) of the primary coil. A moveable contact (81) of the constantly-opening contact (8) is connected with a moveable iron core (72) of the secondary coil. A fixed contact (42) of the primary contact, a fixed contact (52) of the constantly-opening auxiliary contact and a fixed contact of the constantly-opening contact are respectively positioned on the housing (1). The utility model has the advantages that the control circuit used for 3-phase motor phase-lacking protection is simple and easy to assemble, and saves the space without the components, such as medium relay, which are connected with the AC contactor and control buttons and so on.

Description

The open-phase protection A.C. contactor

Technical field

The utility model relates to A.C. contactor.

Background technology

Existing unicoil A.C. contactor need be provided with auxiliary relay when being used for the three phase electric machine open-phase protection and be connected with elements such as A.C. contactor and control buttons, the complicated inconvenience that connects of its control circuit, and it is big to take up room.

Summary of the invention

The purpose of this utility model provides a kind of simple, easy to connect, open-phase protection A.C. contactor of saving the space of control circuit when being used for the three phase electric machine open-phase protection.

Technical solution of the present utility model is: it includes housing, is provided with main coil, main coil iron core, main contact in the housing, often opens auxiliary contact, secondary coil, secondary coil iron core and normally open contact; The main coil iron core includes static iron core and moving iron core, the main coil static iron core is fixed on the housing, the moving iron core of main coil links to each other with housing by spring, main coil is enclosed within on its static iron core, main contact moving contact and often open the moving iron core of auxiliary contact moving contact and main coil and link to each other, main contact fixed contact reach often to be opened the auxiliary contact fixed contact and is fixed on the housing; The secondary coil iron core includes static iron core and moving iron core, the secondary coil static iron core is fixed on the housing, and the moving iron core of secondary coil links to each other with housing by spring, and secondary coil is enclosed within on its static iron core, the normally open contact moving contact links to each other with the moving iron core of secondary coil, and the normally open contact fixed contact is fixed on the housing.

Technique effect of the present utility model is: it has the advantage that control circuit when being used for the three phase electric machine open-phase protection is simple, easy to connect, save the space, does not need to be provided with auxiliary relay and is connected with elements such as A.C. contactor and control buttons.

Description of drawings

Accompanying drawing is the utility model example structure schematic diagram.

Embodiment

As shown in the figure, it includes housing 1, is provided with main coil 2, main coil iron core 3, main contact 4 in the housing 1, often opens auxiliary contact 5, secondary coil 6, secondary coil iron core 7 and normally open contact 8; Main coil iron core 3 includes static iron core 31 and moving iron core 32, main coil static iron core 31 is fixed on the housing 1, the moving iron core 32 of main coil links to each other with housing 1 by spring 9, main coil 2 is enclosed within on its static iron core 31, main contact moving contact 41 and often open auxiliary contact moving contact 51 and link to each other with the moving iron core 32 of main coil, main contact fixed contact 42 reach often to be opened auxiliary contact fixed contact 52 and is fixed on the housing 1; Secondary coil iron core 7 includes static iron core 71 and moving iron core 72, secondary coil static iron core 71 is fixed on the housing 1, the moving iron core 72 of secondary coil links to each other with housing 1 by spring 10, secondary coil 6 is enclosed within on its static iron core 71, normally open contact moving contact 81 links to each other with the moving iron core 72 of secondary coil, and normally open contact fixed contact 82 is fixed on the housing 1.

Claims

The open-phase protection A.C. contactor, it includes housing (1), it is characterized in that: be provided with main coil (2), main coil iron core (3), main contact (4) in the housing (1), often open auxiliary contact (5), secondary coil (6), secondary coil iron core (7) and normally open contact (8); Main coil iron core (3) includes static iron core (31) and moving iron core (32), main coil static iron core (31) is fixed on the housing (1), main coil moves iron core (32) and links to each other with housing (1) by spring (9), main coil (2) is enclosed within on its static iron core (31), main contact moving contact (41) and often open the moving iron core (32) of auxiliary contact moving contact (51) and main coil and link to each other, main contact fixed contact (42) reach often to be opened auxiliary contact fixed contact (52) and is fixed on the housing (1); Secondary coil iron core (7) includes static iron core (71) and moving iron core (72), secondary coil static iron core (71) is fixed on the housing (1), secondary coil moves iron core (72) and links to each other with housing (1) by spring (10), secondary coil (6) is enclosed within on its static iron core (71), normally open contact moving contact (81) links to each other with the moving iron core (72) of secondary coil, and normally open contact fixed contact (82) is fixed on the housing (1).