Dual power automatic switching device

Abstract

This utility model relates to the field of power supply technology, specifically to a dual-power automatic switching device, including a mains port, a live wire port, and a neutral wire port. The dual-power automatic switching device also includes a backup power supply, a load, an intermediate relay, a first AC contactor, and a second AC contactor. The intermediate relay includes an intermediate control terminal, an intermediate normally open switch, and an intermediate normally closed switch. The first AC contactor includes a first control terminal and a first normally open switch. The second AC contactor includes a second control terminal and a second normally open switch. By setting up a backup power supply, a load, an intermediate relay, a first AC contactor, and a second AC contactor, this utility model allows for automatic switching to the backup power supply when the mains suddenly fails, without manual intervention, thus shortening the power outage time. When the mains are powered on, the system automatically connects to the mains; when the mains fail, it automatically connects to the backup power supply, prioritizing the mains power supply. This system is simple in structure, economical, and easy to implement.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, specifically to a dual power supply automatic switching device. Background Technology

[0002] In the modern social system, electricity supply is a key element for maintaining normal social operation. Hospitals, shopping malls, factories, office buildings, and other places are highly dependent on electricity supply. Once the power supply is interrupted, the medical equipment in hospitals will not be able to operate normally, threatening the lives of patients; the business activities of shopping malls will be forced to stop, causing economic losses; the production process in factories will be interrupted, affecting product delivery; and the office order in office buildings will be disrupted, reducing work efficiency.

[0003] However, natural disasters such as typhoons and earthquakes, as well as equipment failures and human error, make power outages sudden and unpredictable. Currently, power restoration after a grid outage mostly relies on manual power switching. This method is not only time-consuming and labor-intensive, requiring professionals to travel to the site, but also carries the risk of operational errors during the switching process. Furthermore, it can lead to prolonged power outages for end-users, failing to meet their demands for continuous and stable power supply. Existing power supply security technologies suffer from slow response times and low levels of automation when dealing with sudden power outages, urgently requiring improvement and refinement. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a power output circuit.

[0005] The purpose of this utility model is achieved through the following technical solution: a power output circuit, including a mains port, a live wire port and a neutral wire port; the dual power automatic switching device also includes a backup power supply, a load, an intermediate relay, a first AC contactor and a second AC contactor;

[0006] The intermediate relay includes an intermediate control terminal, an intermediate normally open switch, and an intermediate normally closed switch.

[0007] The first AC contactor includes a first control terminal and a first normally open switch;

[0008] The second AC contactor includes a second control terminal and a second normally open switch;

[0009] The two ends of the intermediate control terminal are respectively connected to the live wire port and the neutral wire port; the live wire port is connected to the neutral wire port after passing through the intermediate normally open switch and the first control terminal; the live wire port is connected to the neutral wire port after passing through the intermediate normally closed switch and the second control terminal.

[0010] The power grid port is connected to the load via a first normally open switch; the backup power supply is connected to the load via a second normally open switch.

[0011] The present invention is further configured such that a box-type transformer is connected to the power grid port; the input end of the box-type transformer is connected to the power grid port; and the output end of the box-type transformer is connected to the load through a first normally open switch.

[0012] The present invention is further configured such that a first circuit breaker is provided between the output terminal of the box-type transformer and the first normally open switch.

[0013] The present invention is further configured such that the backup power supply includes an energy storage converter; the output terminal of the energy storage converter is connected to the load via a second normally open switch.

[0014] The present invention is further configured such that a second circuit breaker is provided between the output terminal of the energy storage converter and the second normally open switch.

[0015] The present invention is further configured such that the backup power supply also includes a DC cabinet; the input terminal of the energy storage converter is connected to the DC cabinet.

[0016] The present invention is further configured such that the load is connected to a third circuit breaker.

[0017] The beneficial effects of this utility model are as follows: By setting up a backup power supply, a load, an intermediate relay, a first AC contactor, and a second AC contactor, when the power grid suddenly fails, the system automatically switches to the backup power supply without manual switching, thus shortening the power outage time; when the power grid is powered on, it automatically connects to the power grid, and when the power grid fails, it automatically connects to the backup power supply, with the power grid taking priority. The system has a simple structure, is economical, and is easy to implement. Attached Figure Description

[0018] Figure 1 This is a circuit diagram showing the backup power supply, load, intermediate relay, first AC contactor, and second AC contactor working together according to this utility model.

[0019] Figure 2 This is a circuit diagram showing the coordination of the intermediate relay, the first AC contactor, and the second AC contactor of this utility model.

[0020] Among them: 1. Grid port; 21. Live wire port; 22. Neutral wire port; 3. Intermediate control terminal; 31. Intermediate normally open switch; 32. Intermediate normally closed switch; 41. First control terminal; 42. First normally open switch; 51. Second control terminal; 52. Second normally open switch; 6. Box-type transformer; 71. Energy storage converter; 72. DC cabinet; 8. Load; 91. First circuit breaker; 92. Second circuit breaker; 93. Third circuit breaker. Detailed Implementation

[0021] The present invention will be further described in conjunction with the following embodiments.

[0022] Depend on Figures 1 to 2 As can be seen, the power output circuit described in this embodiment includes a mains port 1, a live wire port 21, and a neutral wire port 22; the dual power automatic switching device also includes a backup power supply, a load 8, an intermediate relay, a first AC contactor, and a second AC contactor.

[0023] The intermediate relay includes an intermediate control terminal 3, an intermediate normally open switch 31, and an intermediate normally closed switch 32;

[0024] The first AC contactor includes a first control terminal 41 and a first normally open switch 42;

[0025] The second AC contactor includes a second control terminal 51 and a second normally open switch 52;

[0026] The two ends of the intermediate control terminal 3 are respectively connected to the live wire port 21 and the neutral wire port 22; the live wire port 21 is connected to the neutral wire port 22 through the intermediate normally open switch 31 and the first control terminal 41; the live wire port 21 is connected to the neutral wire port 22 through the intermediate normally closed switch 32 and the second control terminal 51.

[0027] The power grid port 1 is connected to the load 8 via a first normally open switch 42; the backup power supply is connected to the load 8 via a second normally open switch 52.

[0028] Specifically, in the power output circuit described in this embodiment, when the power grid is energized, the intermediate control terminal 3 is turned on. After the intermediate control terminal 3 is turned on, the intermediate normally open switch 31 is closed and the intermediate normally closed switch 32 is opened, thereby energizing and conducting the first control terminal 41 and de-energizing the second control terminal 51, thereby turning on the first normally open switch 42 and opening the second normally open switch 52. At this time, a path is formed between the power grid port 1 and the load 8, and the load 8 is powered by the power grid.

[0029] When the power grid is without power, the intermediate control terminal 3 loses voltage, causing the normally open switch to open and the intermediate normally closed switch 32 to close. At this time, the first normally open switch 42 opens and the second normally open switch 52 closes, thus forming a circuit between the backup power supply and the load 8, and the load 8 is powered by the backup power supply.

[0030] This embodiment, by setting up a backup power supply, a load 8, an intermediate relay, a first AC contactor, and a second AC contactor, allows the system to automatically switch to the backup power supply when the power grid suddenly fails, without manual switching, thus shortening the power outage time. When the power grid is powered on, it automatically connects to the power grid; when the power grid fails, it automatically connects to the backup power supply, with the power grid taking priority. This system has a simple structure, is economical, and is easy to implement.

[0031] In this embodiment, a power output circuit is described, wherein a box-type transformer 6 is connected to the mains port 1; the input terminal of the box-type transformer 6 is connected to the mains port 1; and the output terminal of the box-type transformer 6 is connected to the load 8 via a first normally open switch 42. This configuration facilitates the conversion of the mains voltage to supply power to the load 8.

[0032] In the power output circuit described in this embodiment, a first circuit breaker 91 is provided between the output terminal of the box-type transformer 6 and the first normally open switch 42. This arrangement allows the user to directly control the on / off state of the output terminal of the box-type transformer 6.

[0033] This embodiment of the power output circuit includes a backup power supply comprising an energy storage converter 71. The output terminal of the energy storage converter 71 is connected to a load 8 via a second normally open switch 52. In this embodiment of the power output circuit, a second circuit breaker 92 is provided between the output terminal of the energy storage converter 71 and the second normally open switch 52. This arrangement allows the user to directly control the on / off state of the output terminal of the energy storage converter 71.

[0034] The power output circuit described in this embodiment includes a DC cabinet 72 as a backup power supply; the input terminal of the energy storage converter 71 is connected to the DC cabinet 72. Through the above configuration, with the cooperation of the DC cabinet 72 and the energy storage converter 71, a stable voltage can be output to the load 8.

[0035] In this embodiment, a power output circuit is described, wherein the load 8 is connected to a third circuit breaker 93. This configuration allows the user to directly control the on / off state of the load 8 input terminal.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A dual power automatic transfer device, characterized by: It includes a power grid port (1), a live wire port (21), and a neutral wire port (22); the dual power supply automatic switching device also includes a backup power supply, a load (8), an intermediate relay, a first AC contactor, and a second AC contactor; The intermediate relay includes an intermediate control terminal (3), an intermediate normally open switch (31), and an intermediate normally closed switch (32); The first AC contactor includes a first control terminal (41) and a first normally open switch (42); The second AC contactor includes a second control terminal (51) and a second normally open switch (52); The two ends of the intermediate control terminal (3) are connected to the live wire port (21) and the neutral wire port (22) respectively; the live wire port (21) is connected to the neutral wire port (22) through the intermediate normally open switch (31) and the first control terminal (41); the live wire port (21) is connected to the neutral wire port (22) through the intermediate normally closed switch (32) and the second control terminal (51); The power grid port (1) is connected to the load (8) via a first normally open switch (42); the backup power supply is connected to the load (8) via a second normally open switch (52).

2. The dual automatic transfer switch of claim 1, wherein: The power grid port (1) is connected to a box-type transformer (6); the input end of the box-type transformer (6) is connected to the power grid port (1); the output end of the box-type transformer (6) is connected to the load (8) through a first normally open switch (42).

3. A dual automatic transfer switch according to claim 2, wherein: A first circuit breaker (91) is provided between the output terminal of the box-type transformer (6) and the first normally open switch (42).

4. The dual automatic transfer switch of claim 1, wherein: The backup power supply includes an energy storage converter (71); the output terminal of the energy storage converter (71) is connected to the load (8) through a second normally open switch (52).

5. A dual automatic transfer switch according to claim 4, wherein: A second circuit breaker (92) is provided between the output terminal of the energy storage converter (71) and the second normally open switch (52).

6. A dual automatic transfer switch according to claim 4, wherein: The backup power supply also includes a DC cabinet (72); the input terminal of the energy storage converter (71) is connected to the DC cabinet (72).

7. The dual automatic transfer switch of claim 1, wherein: The load (8) is connected to a third circuit breaker (93).

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