CN216794698U - Protection alarm circuit for preventing UPS direct current reverse connection - Google Patents

Abstract

The utility model discloses a protection alarm circuit for preventing UPS direct current reverse connection, which comprises a UPS device, wherein the positive electrode and the negative electrode of the UPS device are electrically connected with a positive electrode circuit and a negative electrode circuit, a rectifier diode VD is assembled between the UPS device and the positive electrode circuit, a light emitting diode VL and a resistor are assembled between the positive electrode circuit and the negative electrode circuit, and a PLC controller connected with the light emitting diode VL is also assembled in the UPS device; according to the protection alarm loop for preventing the UPS direct current reverse connection, through the arrangement of the light emitting diode VL and the resistor between the positive electrode circuit and the negative electrode circuit, when the positive electrode power supply and the negative electrode power supply of the UPS device are in reverse connection, the rectifier diode VD is cut off, the current in the light emitting diode VL circulates and emits light at the moment, and meanwhile, a corresponding signal is sent to the PLC controller and drives the horn alarm to send an alarm signal, so that the effect of protecting the reverse connection state of the UPS device is achieved.

Description

A kind of protection alarm circuit to prevent UPS DC reverse connection

technical field

The utility model relates to the technical field of UPS power supply, in particular to a protection alarm circuit for preventing the reverse connection of UPS direct current.

Background technique

The UPS power supply device is a static AC uninterrupted power supply device, which can still ensure the uninterrupted power supply of the AC power supply when the urban power grid suddenly loses power. When it is normal, the AC power of the city power grid is changed to DC through the rectifier, and the battery pack is floated. At the same time, the high-quality AC power is outputted by the inverter to supply power to important equipment. Group, use the battery energy storage link to discharge, and supply power to important equipment through the inverter.

When the existing UPS device loses power, the power supply will automatically switch to the DC power supply. If the positive and negative poles of the DC power supply are reversed, the UPS inverter cannot work normally, and an abnormal DC power supply alarm will be issued; in severe cases, the equipment may be burned out , The UPS bus loses power and the important load loses power. The detection device and alarm of the UPS DC power supply are not installed, the backup DC power supply cannot be clearly understood, and the equipment cannot be effectively protected.

Therefore, we propose a protection alarm circuit to prevent UPS DC reverse connection.

Utility model content

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the utility model provides a protection alarm circuit for preventing the reverse connection of the UPS direct current, which solves the problem that the protection effect of the reverse connection of the positive and negative electrodes of the existing UPS device is not good.

(2) Technical solutions

In order to achieve the above purpose, the present utility model is realized through the following technical solutions: a protection alarm circuit for preventing UPS direct current reverse connection, including a UPS device, the positive and negative electrodes of the UPS device are electrically connected with a positive line and a negative line, so the A rectifier diode VD is installed between the UPS device and the positive line, a light-emitting diode VL and a resistor are installed between the positive line and the negative line, and a PLC controller connected to the light-emitting diode VL is also installed in the UPS device.

Preferably, a horn alarm located outside the UPS device is fixedly connected to the outer end of the PLC controller.

Preferably, the rectifier diode VD is assembled on the positive line between the light-emitting diode VL and the UPS device, and the light-emitting diode VL and the rectifier diode VD are connected in parallel.

(3) Beneficial effects

The utility model provides a protection alarm circuit for preventing the reverse connection of UPS direct current. Has the following beneficial effects:

The protection and alarm circuit to prevent the reverse connection of UPS DC, through the setting of the LED VL and the resistance between the positive line and the negative line, when the positive and negative power sources of the UPS device are reversely connected, the rectifier diode VD is turned off, and the current in the light-emitting diode VL is at this time. It circulates and emits light, and at the same time sends corresponding signals to the PLC controller. The PLC controller drives the horn alarm to send out an alarm signal, so as to achieve the effect of protecting the reverse connection state of the UPS device. This technology is economical, safe and reliable. The expected goals are achieved during the operation process. When the equipment is put into maintenance, there is an additional layer of protection and alarm for the backup power supply to ensure the accuracy of the equipment wiring method, improve the reliability of the equipment in the standby state, and prevent the equipment from being burned out.

Description of drawings

FIG. 1 is a schematic circuit diagram of the utility model.

In the figure: 1, UPS device; 2, PLC controller; 3, positive line; 4, negative line; 5, rectifier diode VD; 6, light-emitting diode VL; 7, resistor; 8, horn alarm.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIG. 1, an embodiment of the present utility model provides a technical solution: a protection alarm circuit for preventing UPS DC reverse connection, including a UPS device 1, and the positive and negative electrodes of the UPS device 1 are electrically connected with a positive line 3 and a negative line 4. A rectifier diode VD5 is installed between the UPS device 1 and the positive line 3, a light-emitting diode VL6 and a resistor 7 are installed between the positive line 3 and the negative line 4, and the UPS device 1 is also equipped with a light-emitting diode VL6. PLC controller 2;

Among them, in this embodiment, it needs to be supplemented that, the protection alarm loop for preventing the reverse connection of the UPS DC, through the setting of the light-emitting diode VL6 and the resistor 7 between the positive line 3 and the negative line 4, when the UPS device 1 is positive or negative When the power supply is reversely connected, the rectifier diode VD5 is turned off, and the current in the light-emitting diode VL6 flows and emits light, and at the same time sends a corresponding signal to the PLC controller 2, and the PLC controller 2 drives the horn alarm 8 to issue an alarm signal, so as to achieve the UPS device. 1. The effect of protection in reverse connection state. This technology is economical, safe and reliable. It has achieved the expected goals in the process of debugging and subsequent operation. The accuracy of the wiring method improves the reliability of the equipment in the standby state and prevents the equipment from being burned out.

In this embodiment, it should be supplemented that the outer end of the PLC controller 2 is fixedly connected with a horn alarm 8 located outside the UPS device 1;

Among them, the PLC controller 2 can drive the horn alarm 8 to issue a corresponding sound effect alarm, and cooperate with the setting of the light emitted by the light-emitting diode VL6 to achieve the effect of double alarms, so as to avoid the subsequent protection operation due to the poor alarm effect of the existing device when it is reversely connected. Inadequate situation occurs.

In this embodiment, it should be added that the rectifier diode VD5 is assembled on the positive line 3 between the light-emitting diode VL6 and the UPS device 1, and the light-emitting diode VL6 and the rectifier diode VD5 are connected in parallel.

The working principle and use process of the present utility model: when the positive and negative power sources of the UPS device 1 are normally connected, the rectifier diode VD5 is normally turned on, and there is no forward current in the light-emitting diode VL6 at this time, and then the light-emitting diode VL6 and the horn alarm 8 In the disconnected state, the corresponding alarm is not issued, and when the positive and negative power sources of the UPS device 1 are reversely connected, the rectifier diode VD5 is in the off state at this time, and there is a forward conduction current in the light-emitting diode VL6. At this time, the light-emitting diode VL6 emits light. The signal is sent to the PLC controller 2, and at the same time the PLC controller 2 drives the horn alarm 8 to issue a sound effect alarm, so as to achieve the effect of alarm protection, and solve the problem that the positive and negative poles of the existing UPS device 1 have poor protection effect. .

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and does not deviate from the present invention. The present invention can be implemented in other specific forms under the condition of the spirit or basic features. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (3)

1. A protection alarm loop for preventing UPS direct current reverse connection, characterized in that it comprises a UPS device (1), and the positive and negative electrodes of the UPS device (1) are electrically connected with a positive line (3) and a negative line (4). ), a rectifier diode VD (5) is installed between the UPS device (1) and the positive line (3), and light-emitting diodes VL (6) and VL are installed between the positive line (3) and the negative line (4). Resistor (7), and the UPS device (1) is also equipped with a PLC controller (2) connected to the light-emitting diode VL (6). 2. A protection alarm circuit for preventing UPS DC reverse connection according to claim 1, characterized in that: the outer end of the PLC controller (2) is fixedly connected with a horn alarm located outside the UPS device (1) (8). 3. A protection alarm circuit for preventing UPS DC reverse connection according to claim 1, characterized in that: the rectifier diode VD (5) is assembled on the positive line (3) and is located between the light-emitting diode VL (6) and the UPS On the line between the devices (1), and the light-emitting diode VL (6) and the rectifier diode VD (5) are connected in parallel.

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