CN100358064C

CN100358064C - Quick automatic change-over switch

Info

Publication number: CN100358064C
Application number: CNB2005100141392A
Authority: CN
Inventors: 梁燕; 徐景行; 刘冬英; 李克芹
Original assignee: Tianjin Baili Electronic Co Ltd
Current assignee: Tianjin Baili Electronic Co Ltd
Priority date: 2005-06-29
Filing date: 2005-06-29
Publication date: 2007-12-26
Anticipated expiration: 2025-06-29
Also published as: CN1725400A

Abstract

The present invention relates to a quick automatic change-over switch, which comprises two AC contactors which are connected through a mechanical interlocking member, wherein one AC contactor is connected with general power supply, and the other AC contactor is connected with standby power supply. The present invention also comprises an intermediate relay and two self-locking buttons; the actuating coil of the intermediate relay is connected with the actuating coil of the AC contactor connected with the general power supply in parallel and then is connected with the general power supply through one self-locking button; the actuating coil of the AC contactor connected with the standby power supply is connected with the normally-closed contact of the intermediate relay in series and then is connected with the standby power supply through the other self-locking button. Because the present invention adopts double protection of electric interlock and mechanical interlock, the problem that two paths of power supply simultaneously supply electricity and cause phase faults is avoided. The present invention has high change-over speed, and the change-over time of two TJ40 AC contactors is only 30 to 40 ms. The present invention also has long service life, and the service life can reach 500 thousand times. The present invention has no generation of electromagnetic and electronic interference and very high price ratio, and the cost is one third to one second of that of the automatic change-over switch in markets.

Description

Quick automatic change-over switch

Affiliated technical field

The invention belongs to electric switch, particularly relate to a kind of quick automatic change-over switch.

Background technology

In that known automatic change-over ubiquity conversion speed is slow in the market, wherein slow is 1.5-4 second, fast also want 200 milliseconds, be to use the life-span short in addition, useful life is only up to 5000 times, and shortcoming such as cost an arm and a leg.

Summary of the invention

The present invention provides a kind of quick automatic change-over switch for solving the technical problem that exists in the known technology.

The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: it includes two A.C. contactors that link together by mechanical interlock mechanism quick automatic change-over switch, an A.C. contactor connects power supply commonly used and is used for connection and disjunction power supply commonly used, another A.C. contactor connects stand-by power supply and is used for connecting and the disjunction stand-by power supply, it also includes an auxiliary relay and two locking press buttons, the actuation coil of described auxiliary relay with after the actuation coil of the described A.C. contactor that connects power supply commonly used is in parallel by connecing power supply commonly used behind the described locking press button; The described actuation coil that connects the A.C. contactor of stand-by power supply is connected the back by connecing stand-by power supply behind described another locking press button with the normally-closed contact of described auxiliary relay.

The present invention can also adopt following technical measures:

Described mechanical interlock mechanism is the mechanical interlock mechanism that has two normally-closed contacts; The series circuit of the actuation coil of the described A.C. contactor that connects power supply commonly used and a normally-closed contact series connection of described mechanical interlock mechanism with after the actuation coil of described auxiliary relay is in parallel again by connecing power supply commonly used behind the locking press button; The actuation coil of the described A.C. contactor that connects stand-by power supply with connect stand-by power supply after another normally-closed contact of the normally-closed contact of described auxiliary relay, described mechanical interlock mechanism and described another locking press button are connected.

Advantage and good effect that the present invention has are: because the present invention has adopted electrical interlock and mechanical interlocking duplicate protection, can dually avoid the two-way power supply to power simultaneously, produce phase fault; Conversion speed is fast, and only be 30～40ms the change-over time of two A.C. contactors.And long service life, can reach useful life 500,000 times.No electromagnetism electronic jamming produces, and cost performance is high, cost be on the market automatic change-over 1/3～1/2.

Description of drawings

Fig. 1 is one of circuit theory winding diagram of the present invention;

Fig. 2 is two of a circuit theory winding diagram of the present invention.

Embodiment

For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

See also Fig. 1, the series circuit of often opening auxiliary contact and relay indicating light d1 of A.C. contactor KM1 and power supply U commonly used _NTwo ends join, the series circuit of often opening auxiliary contact and relay indicating light d1 of A.C. contactor KM1 is by in parallel with the actuation coil of intermediate relay ZJ behind the locking press button SB1 simultaneously, in parallel with the actuation coil of A.C. contactor KM1 again, in addition, the series circuit of often opening auxiliary contact and relay indicating light d1 of A.C. contactor KM1 is also in parallel with power supply indicator D1.The series circuit of often opening auxiliary contact and relay indicating light d2 of A.C. contactor KM2 and the two ends of stand-by power supply UR join, simultaneously A.C. contactor KM2's often leaves auxiliary contact and relay indicating light d2 series circuit by in parallel with the series circuit of the normally-closed contact of intermediate relay ZJ and A.C. contactor KM2 actuation coil behind the locking press button SB2, in addition, A.C. contactor KM2 often to drive auxiliary contact also in parallel with power supply indicator D2 with the series circuit of relay indicating light d2.

See also Fig. 2 in addition, go back the series circuit of often opening auxiliary contact and relay indicating light d1 and the power supply U commonly used of A.C. contactor KM1 _NTwo ends join, simultaneously the series circuit of often opening auxiliary contact and relay indicating light d1 of A.C. contactor KM1 is by in parallel with the actuation coil of intermediate relay ZJ behind the locking press button SB1, again with the actuation coil of A.C. contactor KM1 and series circuit parallel connection after a moving contact MI2 of mechanical interlock mechanism connects.In addition, the series circuit of often opening auxiliary contact and relay indicating light d1 of A.C. contactor KM1 is also in parallel with power supply indicator D1.The series circuit of often opening auxiliary contact and relay indicating light d2 of A.C. contactor KM2 and the two ends of stand-by power supply UR join, simultaneously A.C. contactor KM2 often open auxiliary contact and relay indicating light d2 series connection, with circuit after the connecting of another normally-closed contact MI1 of the normally-closed contact of intermediate relay ZJ, mechanical interlock mechanism and A.C. contactor KM2 actuation coil three by in parallel behind the locking press button SB2.In addition, A.C. contactor KM2 often to drive auxiliary contact also in parallel with power supply indicator D2 with the series circuit of relay indicating light d2.

When working, the present invention can use commonly used or stand-by power supply U _NOr U _RDuring normal power supply, A.C. contactor KM1 adhesive, the energising of intermediate relay ZJ actuation coil, power supply major loop commonly used is connected, and power supply commonly used begins power supply.When power control loop commonly used breaks down, stand-by power supply just often, A.C. contactor KM1 opens, the outage of intermediate relay ZJ actuation coil, intermediate relay ZJ normally-closed contact closure, the actuation coil closure of A.C. contactor KM2, the stand-by power supply major loop is connected, and stand-by power supply begins power supply.When power up commonly used just often, intermediate relay ZJ actuation coil energising, the intermediate relay ZJ normally-closed contact often becomes to be opened, A.C. contactor KM2 opens, A.C. contactor KM1 adhesive, power supply major loop commonly used is connected, power supply commonly used begins power supply.

Also during normal power supply, A.C. contactor KM1 adhesive, the energising of intermediate relay ZJ actuation coil, power supply major loop commonly used is connected, and power supply commonly used begins power supply; The normally-closed contact MI2 closure that mechanical interlock mechanism is connected with A.C. contactor KM1 actuation coil, the normally-closed contact MI1 that another of mechanical interlock mechanism connected with the KM2 actuation coil opens.When power supply commonly used breaks down, stand-by power supply just often, A.C. contactor KM1 opens, the outage of intermediate relay ZJ actuation coil, intermediate relay ZJ normally-closed contact closure, mechanical interlock mechanism MI1 closure, the actuation coil electric current of A.C. contactor KM2 normally-closed contact and the normally-closed contact MI1 of mechanical interlock mechanism and closure by intermediate relay ZJ, stand-by power supply is powered; When power up commonly used just often, intermediate relay ZJ actuation coil energising, the intermediate relay ZJ normally-closed contact is opened, A.C. contactor KM2 opens, mechanical interlock mechanism MI2 closure, MI1 open, A.C. contactor KM1 adhesive, power supply power supply commonly used.

Claims

1. quick automatic change-over switch, it includes two A.C. contactors that link together by mechanical interlock mechanism, an A.C. contactor connects power supply commonly used, another A.C. contactor connects stand-by power supply, it is characterized in that: further comprising has an auxiliary relay and two locking press buttons, the actuation coil of described auxiliary relay with after the actuation coil of the described A.C. contactor that connects power supply commonly used is in parallel by connecing power supply commonly used behind the described locking press button; The described actuation coil that connects the A.C. contactor of stand-by power supply is connected the back by connecing stand-by power supply behind described another locking press button with the normally-closed contact of described auxiliary relay.

2. quick automatic change-over switch according to claim 1 is characterized in that described mechanical interlock mechanism is the mechanical interlock mechanism that has two normally-closed contacts; The series circuit of the actuation coil of the described A.C. contactor that connects power supply commonly used and a normally-closed contact series connection of described mechanical interlock mechanism with after the actuation coil of described auxiliary relay is in parallel again by connecing power supply commonly used behind the locking press button; The actuation coil of the described A.C. contactor that connects stand-by power supply with connect stand-by power supply after another normally-closed contact of the normally-closed contact of described auxiliary relay, described mechanical interlock mechanism and described another locking press button are connected.