CN218471841U

CN218471841U - ATS is with simple and easy relay interlock circuit

Info

Publication number: CN218471841U
Application number: CN202222750180.8U
Authority: CN
Inventors: 赵旺旺
Original assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Current assignee: Schneider Wingoal Tianjin Electric Equipment Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-02-10
Anticipated expiration: 2032-10-19

Abstract

The utility model provides a ATS is with simple and easy relay interlock circuit belongs to low-voltage apparatus technical field, including first drive circuit, first locking circuit, second drive circuit and second locking circuit, first drive circuit realizes the interlocking through first locking circuit and second locking circuit with the second drive circuit, and first drive circuit and first locking circuit's input is inputed respectively to first signal, and second drive circuit and second locking circuit's input is inputed respectively to the second signal. The utility model discloses a first locking circuit draws down the drive signal of second relay, and second locking circuit draws down the drive signal of first relay, can prevent that the relay from closing doubly, strengthens drive circuit's anti-interference characteristic.

Description

ATS is with simple and easy relay interlock circuit

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, especially, relate to a ATS is with simple and easy relay interlock circuit.

Background

The ATS is an automatic transfer switching device, commonly called a dual power supply, and functions as a switching device that automatically switches a load circuit from one power supply to another (backup) power supply in a power supply system to ensure continuous and reliable operation of important loads.

In an ATS switch, a relay is often needed to perform power selection operation on an upper port to supply power for a controller and a necessary action part, but when a dual power supply is in actual use, two paths of power supplies are often from different loops, and power selection can be performed at the same time with probability to further cause short circuit so that the controller is burnt.

Most solutions to the above problems in the market at present are to adopt a software logic lock for control, that is, the software logic lock does not send out two ways of electric selection commands at the same time, but such methods are limited in that the software normally runs and a single chip microcomputer normally runs to take effect, but in the actual use process, software bugs appear under certain special conditions, and the single chip microcomputer is difficult to fail for a long time under a complex electrical environment, and particularly in the product action process, the product itself can send out great interference, so that the risk of the short circuit still exists.

Disclosure of Invention

The to-be-solved problem of the utility model is to provide a prevent that relay from selecting electric circuit simultaneously, prevent to make relay actuation simultaneously cause short circuit fault's ATS to use simple and easy relay interlock circuit when software or singlechip trouble.

In order to solve the technical problem, the utility model discloses a technical scheme is: a simple relay interlocking circuit for ATS comprises a first driving circuit, a first locking circuit, a second driving circuit and a second locking circuit, wherein the first driving circuit and the second driving circuit realize interlocking through the first locking circuit and the second locking circuit,

the first signal is respectively input into the input ends of the first driving circuit and the first locking circuit, the second signal is respectively input into the input ends of the second driving circuit and the second locking circuit,

the first resistor, the first triode and the first relay of the first driving circuit are sequentially connected, and the other end of the first triode is connected with the ground;

a second resistor, a second triode and a second relay of the second driving circuit are sequentially connected, and the other end of the second triode is connected with the ground;

a sixth resistor of the first locking circuit is connected with a fourth triode, one end of the fourth triode is connected with the second driving circuit, the connecting contact is positioned between the second resistor and the second triode, and the other end of the fourth triode is connected with the ground;

and a fifth resistor of the second locking circuit is connected with a third triode, one end of the third triode is connected with the first driving circuit, the connecting contact is positioned between the first resistor and the first triode, and the other end of the third triode is connected with the ground.

Furthermore, a first diode is connected in parallel with a first relay, and a common end formed by the other end of the first relay and the cathode of the first diode is connected to a power supply working voltage; the second diode is connected in parallel with the second relay, and the common end formed by the other end of the second relay and the cathode of the second diode is connected to the working voltage of the power supply.

Furthermore, the first capacitor, the third resistor and the first triode are arranged in parallel; the second capacitor and the fourth resistor are connected in parallel with the second triode; the third capacitor is connected with the third triode in parallel; and the fourth capacitor and the fourth triode are arranged in parallel.

Since the technical scheme is used, the utility model discloses a drive signal that second relay was drawn down to first locking circuit, and drive signal that first relay was drawn down to second locking circuit can prevent that the relay from closing doubly, strengthens drive circuit's anti-interference characteristic.

Drawings

The advantages and the manner of realisation of the invention will become more apparent hereinafter by describing in detail, by way of example, with reference to the accompanying drawings, wherein the content shown in the drawings is only intended for the purpose of illustrating the invention, and does not constitute any significant limitation thereof, in which:

fig. 1 is a schematic structural diagram of a first driving circuit and a second locking circuit of the present invention;

fig. 2 is a schematic structural diagram of the second driving circuit and the first locking circuit of the present invention.

Detailed Description

As shown in fig. 1 and fig. 2, the utility model relates to a simple relay interlock circuit for ATS, including first drive circuit, first locking circuit, second drive circuit and second locking circuit, first drive circuit and second drive circuit are through first locking circuit and second locking circuit interlocking.

The first signal RL _ S1 is input to the input terminals of the first drive circuit and the first lock circuit, respectively, and the second signal RL _ S2 is input to the input terminals of the second drive circuit and the second lock circuit, respectively.

A first resistor RN1, a first triode QN1 and a first relay K1 of the first driving circuit are sequentially connected, and the other end of the first triode QN1 is connected with the ground;

a second resistor RN2, a second triode QN2 and a second relay K2 of the second driving circuit are sequentially connected, and the other end of the second triode QN2 is grounded;

a sixth resistor RN6 of the first locking circuit is connected with a fourth triode QN4, one end of the fourth triode QN4 is connected with the second driving circuit, a connecting contact is positioned between the second resistor RN2 and the second triode QN2, and the other end of the fourth triode QN4 is connected with the ground;

the fifth resistor RN5 of the second locking circuit is connected with a third triode QN3, one end of the third triode QN3 is connected with the first driving circuit, the connecting contact is positioned between the first resistor RN1 and the first triode QN1, and the other end of the third triode QN3 is connected with the ground.

The first diode DN1 and the first relay K1 are arranged in parallel, and a common end formed by the other end of the first relay K1 and the negative electrode of the first diode DN1 is connected to a power supply working voltage VCC; the second diode DN2 and the second relay K2 are connected in parallel, and the other end of the second relay K2 and a common end formed by the cathode of the second diode DN2 are connected to a power supply working voltage VCC.

The first capacitor CN1 and the third resistor RN3 are connected in parallel with the first triode QN 1; the second capacitor CN2 and the fourth resistor RN4 are connected in parallel with the second triode QN 2; the third capacitor CN3 is connected in parallel with the third triode QN 3; the fourth capacitor CN4 is connected in parallel to the fourth transistor QN 4.

The working process is as follows:

when the relay normally works, when a first signal RL _ S1 exists, the first triode QN1 corresponding to the first relay K1 is conducted due to the first resistor RN1, the first triode QN1 is normally electrified, the first relay K1 normally acts, meanwhile, the same first signal RL _ S1 also acts on the sixth resistor RN6 and the fourth triode QN4, and the other path is pulled down to obtain a control pin of the second relay K2. At this time, if the second signal RL _ S2 is interfered by an external device or obtains a driving signal from the single chip microcomputer, although the second transistor QN2 can also receive the driving signal through the second resistor RN2, at this time, the first signal RL _ S1 pulls the driving signal low, so the corresponding second relay K2 does not act.

In a similar way, when the second signal RL _ S2 is present, the second transistor QN2 corresponding to the second relay K2 is conducted by the second resistor RN2, so that the second transistor QN2 is normally powered on, the second relay K2 normally operates, and meanwhile, the same second signal RL _ S2 also acts on the fifth resistor RN5 and the third transistor QN3, so as to pull down the control pin of the other path of the first relay K1. At this time, if the first signal RL _ S1 is interfered by an external device or obtains a driving signal from the single chip microcomputer, although the first transistor QN1 can also receive the driving signal through the first resistor RN1, at this time, since the second signal RL _ S2 has pulled the driving signal low, the corresponding first relay K1 will not act.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims

1. The utility model provides a simple and easy relay interlock circuit is used to ATS which characterized in that: the interlocking circuit comprises a first driving circuit, a first locking circuit, a second driving circuit and a second locking circuit, wherein the first driving circuit and the second driving circuit are interlocked through the first locking circuit and the second locking circuit, a first signal is respectively input into input ends of the first driving circuit and the first locking circuit, and a second signal is respectively input into input ends of the second driving circuit and the second locking circuit.

2. The simplified relay interlock circuit for ATS of claim 1, wherein: the first resistor, the first triode and the first relay of the first driving circuit are sequentially connected, and the other end of the first triode is connected with the ground; and a second resistor, a second triode and a second relay of the second driving circuit are connected in sequence, and the other end of the second triode is connected with the ground.

3. The simplified relay interlock circuit for ATS of claim 2, wherein: a sixth resistor of the first locking circuit is connected with a fourth triode, one end of the fourth triode is connected with the second driving circuit, the connecting contact is positioned between the second resistor and the second triode, and the other end of the fourth triode is connected with the ground; and a fifth resistor of the second locking circuit is connected with a third triode, one end of the third triode is connected with the first driving circuit, the connecting contact is positioned between the first resistor and the first triode, and the other end of the third triode is connected with the ground.

4. The simple relay interlock circuit for ATS according to claim 2 or 3, wherein: the first diode is connected with the first relay in parallel, and the common end formed by the other end of the first relay and the cathode of the first diode is connected to the working voltage of the power supply; the second diode and the second relay are connected in parallel, and the common end formed by the other end of the second relay and the cathode of the second diode is connected to the working voltage of the power supply.

5. The simplified relay interlock circuit for ATS according to claim 4, wherein: the first capacitor and the third resistor are connected in parallel with the first triode; the second capacitor, the fourth resistor and the second triode are arranged in parallel; the third capacitor is connected with the third triode in parallel; and the fourth capacitor is connected with the fourth triode in parallel.