CN1477664A

CN1477664A - Four-position integrated A.C. contactor push-button

Info

Publication number: CN1477664A
Application number: CNA031426050A
Authority: CN
Inventors: 媛孟; 孟媛
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-06
Filing date: 2003-06-06
Publication date: 2004-02-25

Abstract

The present invention relates to an AC contactor button integrating four functions of starting, stopping, starting signal light and stopping signal light into one body for controlling AC contactor and displaying its make or break. Said invented AC contactor button includes four-function button head, two discolor light-emitting diodes, common button, power supply circuit, control circuit and relay.

Description

Quaternity A.C. contactor button

The invention belongs to electronic technology, be used for control, demonstration and the o-volt protection of A.C. contactor, can be used for also that equipment makes to have the decompression defencive function with incoming call and connect the single-phase electrical equipment of luminous Presentation Function and the small power electric source switch of three-phase electric apparatus uses.

The control system of present A.C. contactor, be a start button and a stop button, four devices of an enabling signal lamp and a stop light are connected the back with lead and form, press the adhesive of start button A.C. contactor and connect main circuit, the enabling signal lamp is bright, and when pressing stop button again, A.C. contactor discharges, the enabling signal lamp goes out, and stop light is bright.Starting the light on and off with enabling signal lamp and stop light kept of back A.C. contactor attracting state, and the o-volt protection after the power failure, also to control with the conversion of three groups of contacts in the A.C. contactor.

The shortcoming of prior art is that the device of usefulness is many, and it is big to take up space, and four devices and three groups of contacts are coupled together the circuit complexity with electric wire.

The objective of the invention is to overcome above shortcoming, design a kind of button that start button, stop button, enabling signal lamp, stop light four are positioned at one that collects, and three groups of contacts of saving A.C. contactor, when in equipment, controlling the power supply of small-power electrical equipment, can also save A.C. contactor.

Feature of the present invention is that four function heads 1 are arranged, and variable color light-

emitting diode

2 and 3 starts and stop shared button 4, power circuit 5, and control circuit 6, relay 7,

Fig. 1 is a pictorial diagram;

Fig. 2 is a circuit diagram.

Four function heads 1 are the inside at screw thread mouth among Fig. 1, post by the side makes startup and stops shared button 4 closures when pressing, openhanded this button of opening discharges, variable color light-

emitting diode

2 and 3 is two light-emitting diodes that can send different colours light respectively, select for use as variable color light-emitting diode 2 and to glow, variable color light-emitting diode 3 can be selected green light for use, variable color light-emitting diode 2 luminous demonstration release condition, go out variable color light-emitting diode 3 of variable color light-emitting diode 2 shows on-state when bright, because variable color light-emitting diode 3 and at variable color light-emitting diode 2 back sides by the dress, the variable color light-emitting diode 2 so this figure only draws, change 90 ° again and draw a figure, just can see variable color light-emitting diode 3, need press it when four functions that four function heads 1 have are startup, also need press it when stopping, it is made with colourless transparent material, it promptly is to glow to show the lampshade that stops, and also is that green light shows the lampshade of connecting.Therefore the luminous demonstration through and off of variable color on lampshade claim variable color light-emitting

diode

2 and 3,5th, power circuit, the 6th, control circuit, the 7th, relay.

Input 01 and 02 connects AC power among Fig. 2, and C1 and R1, R2 form power circuit 5, C1, R2 step-down, and R1 is that discharge is used.The positive half wave electric current is through D1 and R3, negative half-wave current is charged to the voltage stabilizing value of D6 to C2 through D4, the 2 luminous demonstrations of variable color light-emitting diode stop, when press start and stop shared turning round 4 after, electric current on the C2 makes relay 7 adhesives through D7, the contact of relay 7 makes output 03 and 04 output voltage, this terminates on the coil of A.C. contactor, the contactor adhesive, in openhanded unlatching moving and when stopping shared button 4 the positive half wave electric current flow through the coil and the D3 of relay 7, negative half-wave current flows through T1, T2, R3, R4, R5, D2, D4, D5, and the tele-release on the C2 is fallen, variable color light-emitting diode 2 goes out, the another kind of state of variable color light-emitting diode 3 bright demonstrations, and the effect of capacitor C 3 is adhesives of stable relay 7, use the same method again press start and stop shared button 4 after, because give capacitor C 2 chargings, relay 7 discharges, output 03 and 04 decompression discharge A.C. contactor.After the power failure, sharedly turn round 4 not according to starting and stopping, relay 7 can adhesive, has just had the o-volt protection function.This knob discharges and recharges control with electric capacity C2, and reliability is very high.Other symbol description is referring to Fig. 1 among Fig. 2.

If the single line of control ac contactor coil, relay 7 can not wanted to the contact and the output 03 of output 03.Learn from circuit, just need not to add A.C. contactor if control low power alternating current circuit, directly with this knob control just, it is exactly a mains switch that the decompression defencive function is arranged.Relay 7 as just can control three-phase electric apparatus with three groups of normally opened contacts, if one of three-phase electric apparatus is not controlled mutually, only control two-phase, two groups of normally opened contacts of relay 7 usefulness are the may command three-phase electric apparatus, at this moment this knob is exactly a five in one, and promptly collection starts knob, stops knob, enabling signal lamp, stop light, A.C. contactor five in one.When directly controlling low power motor with this knob; the protection of motor can directly be gone here and there on input 01 with the contact of thermal relay; this knob is just cut off the electricity supply when the thermal relay overcurrent protection; when with the bigger motor of the direct power controlling of this knob; because the capacity of thermal relay contact is not enough; can on relay 7 coils, draw two terminals and be connected on the contact of thermal relay, remove to disconnect main circuit with this button when controlling over current of motor.If power circuit 5 usefulness current-limiting resistances replace, just can be used for doing under the direct current push switch and use.If a mistake wiring end is arranged again, when overvoltage, overcurrent, give a signal, make relay 7 open circuits, make 2 flickers of variable color light-emitting diode by flashing circuit again, so just more than again the fault Presentation Function.

Claims

A kind of quaternity A.C. contactor knob is characterized in that having four function heads 1, and variable color light-emitting diode 2 and 3 starts and stop shared button 4, power circuit 5, control circuit 6, relay 7.