CN2084655U

CN2084655U - Electricity saving ac contactor

Info

Publication number: CN2084655U
Application number: CN 90225654
Authority: CN
Inventors: 雷凯
Original assignee: ENERGY SAVING TECHNIQUE INST NANCHANG CITY
Current assignee: ENERGY SAVING TECHNIQUE INST NANCHANG CITY
Priority date: 1990-12-05
Filing date: 1990-12-05
Publication date: 1991-09-11

Abstract

The utility model relates to an electricity saving alternating current contactor whose main structure is that special normally-closed auxiliary contacts arranged in the alternating current contactor are symmetrically distributed at both sides of the central line and installed in the casing and the support in the middle of the contactor, comprising lower terminal contact components and upper terminal contact components. The lower terminal contact components comprise a lower terminal socket, conical pressing springs and a movable contact; the upper terminal contact components comprise a static contact and an upper terminal socket.

Description

Electricity saving ac contactor

The utility model relates to the low-voltage electrical apparatus switch, relates in particular to a kind of electricity-saving type A.C. contactor.

A.C. contactor is a modern industry, widely used a kind of Electric Traction device for switching in the industries such as agricultural and mine.The A.C. contactor of various series from small to large, consumed power does not wait from tens volt-amperes to volt-ampere up to a hundred, the power consumption that the whole nation is used for A.C. contactor self every year is equivalent to tens0000 kilovolt-amperes of power plants of capacity energy output of the whole year approximately.In the past ten years, the domestic electricity-saving type A.C. contactor that has many units to develop various models in succession, wherein the A.C. contactor of noiseless DC operation is a kind of more advanced, but owing to all many-sides, fails to promote widely.Its main shortcoming is that electricity-saving appliance and contactor adopt discrete, and many lines are arranged therebetween, and inconvenience is installed in actual use.

The purpose of this utility model is to propose a kind of novel electricity-saving type A.C. contactor, make electricity-saving appliance and A.C. contactor integrated, simultaneously, to the A.C. contactor internal structure, make corresponding improvement, with the normally closed special-purpose auxiliary contact of the normally closed interlock on the electricity-saving appliance as A.C. contactor, portion sets within it, alleviate the burden of the normally closed interlock of A.C. contactor itself, help promoting the use of of it.

The utility model power savings is more than 90%, have safe and reliable, temperature rise is low, noiseless, the long characteristics of with low cost, coil electric life, also has mode of connection variation (disconnected direct current, the stream of breaking off a friendship) and profile installation dimension and the identical characteristics of old product simultaneously.

The utility model has following accompanying drawing:

Fig. 1 is this schematic diagram of device;

Fig. 2 is the position view of special-purpose normally closed auxiliary contact at A.C. contactor;

Fig. 3 is the partial enlarged drawing of special-purpose normally closed auxiliary contact in A.C. contactor.

Below the contrast accompanying drawing is illustrated in conjunction with the embodiments.

Referring to Fig. 1, this electricity-saving appliance is by the adhesive loop and keep the loop to form.The adhesive loop is formed by current-limiting resistance R, halfwave rectifier diode D1, the special-purpose normally closed auxiliary contact J2, the contactor coil J that are arranged on A.C. contactor inside, stop button TA with by start button QA and normally open contact J1 parallel circuits.When the sinusoidal alternating current of A, B end loading, electric current constitutes the loop through current-limiting resistance R, halfwave rectifier diode D1, special-purpose normally closed auxiliary contact J2, coil J, stop button TA and start button QA.In a cycle, just can in coil J, produce pulsating direct current and make the contactor adhesive, after the adhesive, special-purpose normally closed auxiliary contact J2 automatic disconnection, system just changes over to and keeps the loop, in keeping the loop, decompression capacitor C provides coil J required electric current, and the electric current sustained diode 2 of flowing through is made halfwave rectifier, and when another half-wave and coil J constitute continuous current circuit, obtain the pulsating direct current with adhesive loop equidirectional, guarantee the contactor operate as normal.Piezo-resistance Ru is used for overvoltage in the absorption circuit, with the electric spark that prevents that sustained diode 2 from puncturing and stop button TA produces.

Referring to Fig. 2,3, a pair of normally closed interlock J2 of electricity-saving appliance was arranged on a pair of normally closed interlock of A.C. contactor itself in the past, had so just reduced the A.C. contactor function of use, and the utility model is provided with special-purpose normally closed auxiliary contact J2 in A.C. contactor inside.Should be to normally closed auxiliary contact J2 symmetrical distribution center line both sides (only drawing among Fig. 2 on one side).Be installed in middle support 2 of contactor and the shell 6, comprise lower end contact assembly and upper end contact assembly.The lower end contact assembly is made up of lower end base 1, taper stage clip 3, moving contact 4, and the upper end contact assembly is made up of fixed contact 5, upper end base 7.This has delay function to normally closed interlock, helps contacting normal startup.Other part of contactor comprises that decompression capacitor C, diode D1, D2 and piezo-resistance Ru are installed in the inside of contactor.

Claims

1, the incorporate electricity-saving type A.C. contactor of a kind of electricity-saving appliance and A.C. contactor, comprise electromagnet, contact, coil, electric capacity, diode and piezo-resistance, support and shell etc., it is characterized in that being provided with special-purpose normally closed auxiliary contact in A.C. contactor inside, its symmetrical distribution center line both sides, be installed in middle support of contactor and the shell, comprise lower end contact assembly and upper end contact assembly, the lower end contact assembly is made up of lower end base, taper stage clip and moving contact, and the upper end contact assembly is made up of fixed contact and upper end base.