CN2196817Y

CN2196817Y - Low-voltage AC vacuum contactor

Info

Publication number: CN2196817Y
Application number: CN 94205694
Authority: CN
Inventors: 吴铁岑
Original assignee: FUXIN CITY APPLICATION TECHNOLOGY INST
Current assignee: FUXIN CITY APPLICATION TECHNOLOGY INST
Priority date: 1994-03-31
Filing date: 1994-03-31
Publication date: 1995-05-10
Anticipated expiration: 2004-03-31

Abstract

The utility model provides a low-voltage AC vacuum contactor. The utility model is characterized in that a moving arm is composed of a main body (2), and a connecting plate (19); an armature iron is fastened on the connecting plate (19). The main body (2) is an L-shaped lever whose rotating center is positioned on a supporting point. An AC control power source is offered to coils (2) by a rectifier which is composed of four diodes, and a normal closing auxiliary contact (1) of an auxiliary switch (32). The normal closing auxiliary contact (1) of the auxiliary switch (32) is switched off after main circuits are switched on, the AC control power source is offered to the coils (2) by a half-wave rectifier, and the half-wave rectifier is composed of the diodes. Holding currents are only half of attract currents, the service life is long, and the time of stopping working for repairing is reduced.

Description

Low-voltage AC vacuum contactor

The utility model relates to a kind of low-voltage alternating-current contactor, belongs to the lv contactor technical field.

The standard JB/DQ4173-86 of electrical equipment industry office of the existing mechanical Ministry of Industry " CKJ5 series AC vacuum contactor ", the rated operational current of its main circuit has only three kinds of 250A, 400A, 630A.Therefore at present at little electric current, operation is frequent, turns round continuously and the abominable occasion of environment, and rated operational current is below 250A, the main circuit rated voltage is to control alternating current motor under 380V or the 220V condition, electromagnetic starter, and in other control system, can only use various air insulation type contactors, useful life is short, change the operation that will stop production of these contactors, influence is produced, and causes economic loss.

The purpose of this utility model is to satisfy user's needs, a kind of improved low-voltage alternating-current vacuum contactor is provided, and it is strong to have breaking capacity, and the life-span is long, the responsiveness height, electric arc does not expose, and is safe and reliable, and volume is little, in light weight, the operating system power consumption is also little, and noiselessness can badly be operated long-term continuous operation under the frequent condition at environment.

The utility model proposes following technical scheme in order to achieve the above object.

A kind of low-voltage alternating-current vacuum contactor, comprise pedestal 3, coil II, yoke 9, armature 10, iron core 11, transmission screw 17, reaction spring 18, swing arm, axle 27, vacuum switch tube 31, main circuit connection plate 6, auxiliary switch 32, exchange control assembly, it is characterized in that, swing arm is connected by the moving contact of screw 17 with vacuum switch tube 31, swing arm is made up of swing arm body 2 and swing arm connecting plate 19, and armature is fastened on the swing arm connecting plate 19.

The utility model compared with prior art has following advantage, alternative rated voltage is that 380V lies prostrate or 220 volts, rated current is at a large amount of air insulation contactors that use below 250 amperes, long service life, at least one can be pushed up 10 uses, and significantly reduce maintenance and the loss that stops production, can obtain great economic benefit.

Fig. 1 is the sketch of facing of the utility model contactor embodiment;

Fig. 2 is that A among the utility model contactor Fig. 1 is to profile;

Fig. 3 is the top view of the utility model contactor Fig. 1;

Fig. 4 is the circuit diagram of the utility model contactor.

In conjunction with the accompanying drawings the utility model is elaborated below by embodiment.Fig. 4 is the circuit diagram of the utility model contactor embodiment, the control power supply is connected to input a, the b of a single-phase rectifier of being made up of four diodes and normally closed auxiliary contact I, and two contact F, G of the normally closed auxiliary contact I of its auxiliary switch are connected on two diode D3 of diode rectifier, cathode output end d, the e of D4 respectively.

Ac control power supply is given the coil II via single-phase rectifier D1, D3, D2, D4 feed that the normally closed auxiliary contact I of four diodes and auxiliary switch 32 is formed, after main circuit is connected.The normally closed auxiliary contact I of auxiliary switch 32 disconnects, the single-phase halfwave rectifier D1 that ac control power supply is given through above-mentioned diode, and the D4 feed is given the coil II.Make holding current only be half of attract current, much easier than traditional resistance step-down or two-coil method.

When ac control power supply is connected, through single-phase bridge rectifier, supply with coil II (Fig. 4), iron core 11 under the action of a magnetic field, adhesive armature 10 makes swing arm around axle 27 rotations, through transmission screw 17 vacuum switch tube 31 is connected, the swing arm other end is depressed auxiliary switch 32, make for example I disconnection of its normally closed auxiliary contact, rectifier becomes half-wave rectifying circuit, supplies with the coil II.

Fig. 2 be A among the utility model contactor Fig. 1 to profile, the swing arm of the utility model contactor is made up of swing arm body 2, swing arm connecting plate 19 trip bolts, and armature is fastened on the swing arm connecting plate 19.Swing arm body (2) is the L shaped lever of practising in the rotation on fulcrum.

Swing arm is connected by the moving contact of transmission screw (17) with vacuum switch tube (31).When reaction spring (18) when armature is backed down, switching tube (31) is off-state.When connecting the control power supply, the armature adhesive, swing arm makes the moving contact and the fixed contact closure of switch through the transmission screw, reaches the purpose of switch connection.This part transmission device designs very simply and ingenious, is big characteristics of this contactor.

Contactor has a pedestal 3(Fig. 1), and a plurality of main circuit connection plate 6(Fig. 3).

The main circuit rated operational current of the utility model contactor can be 60A, 80A, 100A, 125A, 160A, and the main circuit rated operational voltage is for exchanging 380V, 220V.Also can be deformed into other specification according to user's needs.

Claims

1, low-voltage alternating-current vacuum contactor, comprise pedestal (3), coil (II), yoke piece (9), armature (10), iron core (11), transmission screw (17), reaction spring (18), swing arm, axle (27), vacuum switch tube (31), auxiliary switch (32) exchange control assembly, it is characterized in that, swing arm is connected by the moving contact of transmission screw (17) with vacuum switch tube (31), swing arm is made up of swing arm body (2) and swing arm connecting plate (19), and armature is fastened on the swing arm connecting plate (19).

2, according to the low-voltage alternating-current vacuum contactor of claim 1, it is characterized in that, exchange control assembly, input termination ac control power supply (L, M), comprise that also (F G), is connected on the cathode output end (d, e) of two diode D3, D4 of diode rectifier respectively for two contacts of the normally closed auxiliary contact (I) of four diodes and auxiliary switch.

According to the low-voltage alternating-current vacuum contactor of claim 1, it is characterized in that 3, swing arm body (2) is the L shaped lever of a pivot on fulcrum.