CN200976334Y

CN200976334Y - Non-phase lacking AC contactor

Info

Publication number: CN200976334Y
Application number: CN 200620009357
Authority: CN
Inventors: 王明光
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-08
Filing date: 2006-11-08
Publication date: 2007-11-14
Anticipated expiration: 2016-11-08

Abstract

The utility model relates to an open-phase free AC contactor, referring in particular to AC contactor controllers for switching type three-phase electric motors, which is composed of an upper cover, a lower cover, a coil and a fuse; wherein, the upper cover is provided with an operating rod, a spring for the separation of the upper and lower contacts, a coil contact, and two moving armatures connected with the operating rod; the lower cover is provided with a separating spring, terminal boxes for double coils, and a fixed armature. The three-phase current is connected with the fuse via indirect contacts. The utility model is characterized in that: the three-phase electric motors are controlled by double coils, therefore contactor with too low voltage fails to function because of the small electromagnetic force between the coil and the armature, and the fuse of the coils fuses first under too high voltage, thus the contactor does not work to ensure the safe running of the three-phase electric motors. Therefore, the utility model has the advantages of simple structure, convenient operation, low cost, and wide application to the safety protection of three-phase power equipments.

Description

Intact cross streams contactor

Technology neck field:

The utility model relates to a kind of intact cross streams contactor, particularly switching regulator threephase motor A.C. contactor control appliance.

Background technology:

At present, the A.C. contactor of common usefulness, its defective is that contactor is controlled a certain phase contact, the back loose contact is used in long-term work, causes the phase shortage of threephase motor to burn main cause.Existing A.C. contactor can only play the effect of Switching Power Supply, is not play any effect to phase shortage, and loose contact is burnt in a certain phase contact, still send electricity to motor, causes the harm of burning of threephase motor.

Summary of the invention:

The purpose of this utility model provides a kind of intact cross streams contactor, and it is to adopt indirect type contact and the operation of twin coil control threephase motor, and the coil of the too low contactor of voltage and the electromagnetic force of fixed armature are little and do not work; The fuse of overtension contactor coil disconnects earlier, and contactor is not worked, and guarantees the safe operation of threephase motor.

The intact cross streams contactor of the utility model takes following technical scheme to realize, it is to be made of upper and lower enclosure and coil and fuse, actuating strut and upper and lower contact and contact separation spring and coil contact are set in the upper casing, connecting moves bar on two moving armatures, lower casing is provided with cut spring and twin coil and winding wiring box and fixed armature, and three-phase electricity connects fuse by the indirect type contact.

During startup, press and release the button, three-phase alternating current ABC is releasing the button by three groups of one respectively, B phase power supply flow through again after by the K2 that releases the button accordingly fuse RD and X button K0, all advance actuating coil L1 and L2 at last, moving armature G1 and F1 under the electromagnetic attracting force that coil L1 and L2 energising back and fixed armature F and G form, and each associated moving contact are to sending by power output end A1, B1, C1 with threephase motor.The fixed contact of the output that then is flexible coupling continues descending, each lead contact of coil L1 and L2 in the contact, thus behind release the button K1, K2, the K3 coil L1, L2 are powered, contactor is normally moved.

When closing, press normal open X button K0, B phase power supply is supply coil L1 no longer, L2 voltage, though power supply A, the C two-phase still is supplied to coil L1, L2 voltage, but the circuit of series connection, each coil L1, the voltage of L2 has only 1/2nd of operating voltage, the electromagnetic force that is produced also has only 1/2nd of required operational forces, moving armature G1 under the effect of return spring, the F1 return, be back in the time of to leave the coil lead contact coil L1, the A of L2, C two-phase electricity just loses voltage, and electromagnetic force disappears, moving armature G1, F1 and contact be return timely, and the assurance contactor cuts out fast.

In the three phase mains any one lacks mutually, and when perhaps any one contact in the contactor was burnt with loose contact, respective coil L1, L2 did not just work, and the voltage of another coil just can not be supplied, the contactor operation that quits work.

The effect of the intact cross streams contactor of the utility model is simple in structure, and is easy to operate, adopts the operation of twin coil control threephase motor, and the coil of the too low contactor of voltage and the electromagnetic force of fixed armature are little and do not work; The fuse of overtension contactor coil fusing earlier disconnects, and contactor is not worked, and guarantees the safe operation of threephase motor.

Attached explanation:

The intact cross streams contactor of the utility model will describe in further detail in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of the intact cross streams contactor of the utility model.

Fig. 2 is the circuit diagram of the intact cross streams contactor of the utility model.

Embodiment:

With reference to Fig. 1,2, the intact cross streams contactor of the utility model, it is to be made of upper and lower enclosure and coil and fuse, actuating strut 2 and upper and

lower contact

3,4 and contact separation spring 5 and coil contact 6 are set in the upper casing 1, connecting moves bar 2 on two moving armatures 7, lower casing 13 is provided with cut spring 9 and twin coil 11 and winding wiring box 10 and fixed armature 12, and three-phase electricity connects fuse 8 by the indirect type contact.

Claims

1, a kind of intact cross streams contactor, it is to be made of upper and lower enclosure and coil and fuse, it is characterized in that being provided with in the upper casing (1) actuating strut (2) and upper and lower contact (3), (4) and contact separation spring (9) and coil contact (6), two moving armatures (7) are gone up connecting moves bar (2), lower casing (13) is provided with cut spring (9) and twin coil (11) and winding wiring box (10) and fixed armature (12), and three-phase electricity connects fuse (8) by the indirect type contact.

2, according to the described intact cross streams contactor of claim 1, it is characterized in that adopting indirect type contact and twin coil L1, L2 control threephase motor operation, coil L1, the L2 of the too low contactor of voltage and the electromagnetic force of fixed armature G, F are little and do not work; The fuse RD of overtension contactor coil L1, L2 disconnects earlier, and contactor is not worked, and guarantees the safe operation of threephase motor.