Dual-power intelligent switching equipment

Abstract

The invention discloses the technical field of power supplies, and particularly relates to dual-power-supply intelligent switching equipment, which comprises a cabinet body, and is characterized in that the cabinet body is provided with a first power supply input end, a second power supply input end, a power supply output end, a first circuit breaker, a second circuit breaker, a first contactor and a second contactor; the control module is arranged on the cabinet body, and the control module is used for controlling opening and closing between an auxiliary output contact of the first contactor and a zero line and opening and closing between an auxiliary output contact of the second contactor and the zero line so as to switch an external main power supply and an external standby power supply for supplying power to an external load; according to the dual-power-supply intelligent switching equipment, the purpose of dual-power-supply switching can be achieved, at the moment, the normally-open contact of the first contactor is closed, and therefore the first power supply input end and the power supply output end are electrically connected, and the purpose that an external main power supply supplies power to an external load is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and in particular to a dual-power supply intelligent switching device. Background Art

[0002] With the development of the economy, various types of electricity users such as governments, schools, enterprises, and businesses have an increasing demand for no or minimal power outages, and have higher and higher requirements for the recovery time after a power outage. At present, although some users have built UPS (Uninterruptible Power Supply) devices on their own, and emergency power supply vehicles can also guarantee the operation needs of important loads; however, most electricity users with secondary and general loads lack the means to meet the demand for no power outages, resulting in long power outages; therefore, there is an urgent need for an emergency dual power supply switching technology solution that can meet users' power demand for no power outages at a low cost and with simple operation. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the fact that most of the existing electricity users with secondary and general loads lack the means to ensure that the power outage demand is not met, resulting in a problem of excessively long power outages, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a dual power supply intelligent switching device.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a cabinet, on which a first power input terminal, a second power input terminal, a power output terminal, a first circuit breaker, a second circuit breaker, a first contactor and a second contactor are arranged; a control module, which is arranged on the cabinet, and the control module is used to control the opening and closing between the auxiliary output contact of the first contactor and the neutral line, and the opening and closing between the auxiliary output contact of the second contactor and the neutral line, so as to switch the external main power supply and the external backup power supply block for powering the external load.

[0007] As a preferred solution of the dual power intelligent switching device of the present invention, wherein: the first power input terminal is used to electrically connect to an external main power supply, and the second power input terminal is used to electrically connect to an external backup power supply; the first power input terminal is electrically connected to the input contact of the first circuit breaker,

[0008] The second power input terminal is electrically connected to the input contact of the second circuit breaker;

[0009] The output contact of the first circuit breaker is electrically connected to the normally open input contact of the first contactor;

[0010] The output contact of the second circuit breaker is electrically connected to the normally open input contact of the second contactor;

[0011] The normally open output contact of the first contactor is electrically connected to the power output terminal; the normally open output contact of the second contactor is electrically connected to the power output terminal;

[0012] The power output end is used to electrically connect to an external load; the auxiliary input contact of the first contactor is electrically connected to the output contact of the first circuit breaker, and the auxiliary input contact of the second contactor is electrically connected to the output contact of the second circuit breaker;.

[0013] As a preferred solution of the dual power intelligent switching device of the present invention, the control module includes a controller, a sliding arm, a first electromagnet, a second electromagnet, a battery, a copper sheet, a first contact sheet, a second contact sheet, a third contact sheet and a fourth contact sheet; the first contact sheet is electrically connected to the neutral line; the second contact sheet is electrically connected to the auxiliary output contact of the first contactor; the third contact sheet is electrically connected to the neutral line; the fourth contact sheet is electrically connected to the auxiliary output contact of the second contactor; the first contact sheet and the second contact sheet are on one side of the copper sheet; the third contact sheet and the fourth contact sheet are electrically connected to the auxiliary output contact of the second contactor; The copper sheet is located on the other side of the copper sheet; the copper sheet is connected to one end of the sliding arm through an insulating block; the battery is used to power the controller, the first electromagnet, and the second electromagnet; the controller is used to control the start and stop of the first electromagnet and the second electromagnet; the first electromagnet and the second electromagnet can respectively attract the sliding arm; when the first electromagnet attracts the sliding arm, the copper sheet is simultaneously in contact with the first contact piece and the second contact piece; when the second electromagnet attracts the sliding arm, the copper sheet is simultaneously in contact with the third contact piece and the fourth contact piece.

[0014] As a preferred solution of the dual power intelligent switching device described in the present invention, wherein: the control module also includes a first slide bar and a second slide bar; the first electromagnet and the second electromagnet are both located between the first slide bar and the second slide bar; the first slide bar and the second slide bar are parallel to each other; the slide arm is slidably mounted on the first slide bar and the second slide bar respectively; the first slide bar and the second slide bar are both perpendicular to the slide arm.

[0015] As a preferred solution of the dual power intelligent switching device described in the present invention, wherein: the control module also includes a base; the first electromagnet, the second electromagnet, the first slide bar, the second slide bar, the first contact piece, the second contact piece, the third contact piece and the fourth contact piece are all arranged on the base.

[0016] As a preferred solution of the dual power intelligent switching device of the present invention, wherein: the sliding arm is located between the first electromagnet and the second electromagnet; the first contact piece, the second contact piece, the third contact piece and the fourth contact piece are all elastic contact pieces.

[0017] As a preferred solution of the dual power intelligent switching device described in the present invention, wherein: the control module also includes a first voltage transformer; the first voltage transformer and the controller are communicatively connected; the first voltage transformer is used to detect the output voltage value of the first circuit breaker in real time and send it to the controller; the controller is also used to: when the output voltage value of the first circuit breaker is lower than a preset voltage value, control the first electromagnet to lose power, and control the second electromagnet to start.

[0018] As a preferred solution of the dual power intelligent switching device described in the present invention, wherein: the control module also includes a second voltage transformer; the second voltage transformer is communicatively connected to the controller; the second voltage transformer is used to detect the output voltage value of the second circuit breaker in real time and send it to the controller; the controller is also used to: when the output voltage value of the second circuit breaker is lower than a preset voltage value, control the second electromagnet to lose power and control the first electromagnet to start.

[0019] As a preferred solution of the dual power intelligent switching device described in the present invention, it further comprises a display screen; the display screen is communicatively connected to the controller; the cabinet body comprises a cabinet door; the display screen is arranged on the cabinet door; the controller is also used to: display the received output voltage value of the first circuit breaker on the display screen; and display the received output voltage value of the second circuit breaker on the display screen.

[0020] As a preferred solution of the dual power intelligent switching device described in the present invention, wherein: the first circuit breaker and the second circuit breaker are both four-pole circuit breakers; the first contactor and the second contactor are both four-pole contactors; and the controller is a single-chip microcomputer.

[0021] Beneficial effects of the present invention: The dual-power intelligent switching device proposed in the present invention can meet the purpose of dual-power switching, and meet the user's non-stop power demand with low cost and simple operation; under normal circumstances, the control module controls the auxiliary output contact of the first contactor and the neutral line to be closed, and at this time, the auxiliary output contact of the second contactor and the neutral line to be opened, and at this time, the normally open contact of the first contactor is closed, so that the first power input terminal and the power output terminal are electrically connected, so that the external main power supply can supply power to the external load; when the external main power supply is powered off, the first circuit breaker is powered off, so that the auxiliary output contact of the first contactor and the neutral line are electrically connected. The gate is opened between the auxiliary output contacts of the second contactor, thereby separating the normally open contacts of the first contactor, so that there is no electrical conduction between the first power input terminal and the power output terminal; at this time, the control module controls the auxiliary output contact of the second contactor to close with the neutral line, and at this time, the gate between the auxiliary output contact of the first contactor and the neutral line is opened, and at this time, the normally open contacts of the second contactor are closed, so that there is electrical conduction between the second power input terminal and the power output terminal (at this time, there is no electrical conduction between the first power input terminal and the power output terminal), thereby realizing the external backup power supply to supply power to the external load, that is, realizing dual power backup power supply; thereby meeting the user's non-stop power demand with low cost and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0023] Figure 1 It is a schematic diagram of the overall structure of the dual power intelligent switching device of the present invention.

[0024] In the figure: 100, cabinet; 110, base; 120, first slide bar; 130, second slide bar; 140, slide arm; 150, first electromagnet; 160, second electromagnet; 170, insulating block; 180, copper sheet; 190, first contact piece; 210, second contact piece; 220, third contact piece; 230, fourth contact piece. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a dual power intelligent switching device, including a cabinet 100, on which a first power input terminal, a second power input terminal, a power output terminal, a first circuit breaker, a second circuit breaker, a first contactor, and a second contactor are arranged;

[0030] Specifically, the first power input terminal is used to electrically connect to an external main power supply (such as AC power), and the second power input terminal is used to electrically connect to an external backup power supply (such as a storage power supply); the first power input terminal is electrically connected to the input contact of the first circuit breaker, and the second power input terminal is electrically connected to the input contact of the second circuit breaker; the output contact of the first circuit breaker is electrically connected to the normally open input contact of the first contactor; the output contact of the second circuit breaker is electrically connected to the normally open input contact of the second contactor; the normally open output contact of the first contactor is electrically connected to the power output terminal; the normally open output contact of the second contactor is electrically connected to the power output terminal; the power output terminal is used to electrically connect to an external load; the auxiliary input contact of the first contactor is electrically connected to the output contact of the first circuit breaker, and the auxiliary input contact of the second contactor is electrically connected to the output contact of the second circuit breaker;

[0031] Furthermore, the control module is used to control the opening and closing between the auxiliary output contact of the first contactor and the neutral line, and the opening and closing between the auxiliary output contact of the second contactor and the neutral line, so as to switch the external main power supply and the external backup power supply for powering the external load.

[0032] It should be noted that the present invention can meet the purpose of dual power supply switching and meet the user's non-stop power demand with low cost and simple operation; under normal circumstances, the control module controls the auxiliary output contact of the first contactor and the neutral line to be closed, and at this time, the auxiliary output contact of the second contactor and the neutral line to be opened. At this time, the normally open contact of the first contactor is closed, so that the first power input terminal and the power output terminal are electrically connected, so that the external main power supply can supply power to the external load; when the external main power supply is powered off, the first circuit breaker is powered off, so that the auxiliary output contact of the first contactor and the neutral line are opened, and then the normally open contact of the first contactor is closed. The normally open contacts of one contactor are separated, so that there is no electrical conduction between the first power input terminal and the power output terminal; at this time, the control module controls the auxiliary output contact of the second contactor and the neutral line to be closed, and at this time, the auxiliary output contact of the first contactor and the neutral line are opened, and at this time, the normally open contacts of the second contactor are closed, so that there is electrical conduction between the second power input terminal and the power output terminal (at this time, there is no electrical conduction between the first power input terminal and the power output terminal), so that the external backup power supply can supply power to the external load, that is, dual power backup power supply is realized; thereby, the user's power demand for non-stop power supply is met with low cost and simple operation.

[0033] In addition, when the external main power supply resumes power supply again, the control module controls the auxiliary output contact of the second contactor and the neutral line to be opened, and controls the auxiliary output contact of the first contactor and the neutral line to be closed. At this time, the normally open contact of the first contactor is closed again, so that the first power input terminal and the power output terminal are electrically connected (at this time, the second power input terminal and the power output terminal are no longer electrically connected), so that the external main power supply can supply power to the external load again.

[0034] Example 2, reference Figure 1, this embodiment is different from the first embodiment in that: the control module includes a controller (a single chip microcomputer in this embodiment), a sliding arm 140, a first electromagnet 150, a second electromagnet 160, a battery (not shown), a copper sheet 180, a first contact sheet 190, a second contact sheet 210, a third contact sheet 220 and a fourth contact sheet 230; the first contact sheet 190 is electrically connected to the neutral line; the second contact sheet 210 is electrically connected to the auxiliary output contact of the first contactor; the third contact sheet 220 is electrically connected to the neutral line; the fourth contact sheet 230 is electrically connected to the auxiliary output contact of the second contactor; the first contact sheet 190 and the second contact sheet 210 are on one side of the copper sheet 180; the third contact sheet 220 The first and second electromagnets 150 and 160 are on the other side of the copper sheet 180; the copper sheet 180 is connected to one end of the sliding arm 140 through the insulating block 170; the battery is used to power the controller, the first electromagnet 150, and the second electromagnet 160; the controller is used to control the start and stop of the first electromagnet 150 and the second electromagnet 160; the first electromagnet 150 and the second electromagnet 160 can respectively attract the sliding arm 140; when the first electromagnet 150 attracts the sliding arm 140, the copper sheet 180 is simultaneously in contact with the first contact piece 190 and the second contact piece 210; when the second electromagnet 160 attracts the sliding arm 140, the copper sheet 180 is simultaneously in contact with the third contact piece 220 and the fourth contact piece 230.

[0035] Specifically, when the copper sheet 180 is in contact with the first contact piece 190 and the second contact piece 210 at the same time, the normally open contact of the first contactor is closed, that is, the first power input terminal and the power output terminal are electrically connected; when the copper sheet 180 is in contact with the third contact piece 220 and the fourth contact piece 230 at the same time, the normally open contact of the second contactor is closed, that is, the second power input terminal and the power output terminal are electrically connected.

[0036] At the same time, the control module also includes a first slide bar 120 and a second slide bar 130; the first electromagnet 150 and the second electromagnet 160 are both located between the first slide bar 120 and the second slide bar 130; the first slide bar 120 and the second slide bar 130 are parallel to each other; the slide arm 140 is slidably mounted on the first slide bar 120 and the second slide bar 130 respectively; the first slide bar 120 and the second slide bar 130 are both perpendicular to the slide arm 140.

[0037] Specifically, the control module further includes a base 110; a first electromagnet 150, a second electromagnet 160, a first slide bar 120, a second slide bar 130, a first contact piece 190, a second contact piece 210, a third contact piece 220 and a fourth contact piece 230 are all disposed on the base 110. The slide arm 140 is located between the first electromagnet 150 and the second electromagnet 160; the first contact piece 190, the second contact piece 210, the third contact piece 220 and the fourth contact piece 230 are all elastic contact pieces.

[0038] The rest of the structure is the same as that of Example 1.

[0039] Example 3, reference Figure 1 This embodiment is different from the above embodiments in that: the control module also includes a first voltage transformer; the first voltage transformer is communicatively connected to the controller; the first voltage transformer is used to detect the output voltage value of the first circuit breaker in real time and send it to the controller; the controller is also used to: when the output voltage value of the first circuit breaker is lower than a preset voltage value (for example, % of the normal rated voltage), control the first electromagnet 150 to lose power and control the second electromagnet 160 to start.

[0040] Specifically, when the output voltage value of the first circuit breaker is lower than the preset voltage value, it indicates that the external main power supply has a power supply abnormality (such as a power outage), and it is necessary to switch to the external backup power supply.

[0041] Similarly, the control module also includes a second voltage transformer; the second voltage transformer is communicatively connected to the controller; the second voltage transformer is used to detect the output voltage value of the second circuit breaker in real time and send it to the controller; the controller is also used to: when the output voltage value of the second circuit breaker is lower than a preset voltage value, control the second electromagnet 160 to lose power and control the first electromagnet 150 to start.

[0042] Specifically, when the output voltage value of the second circuit breaker is lower than the preset voltage value, it indicates that the external backup power supply has a power supply abnormality (eg, power failure), and it is necessary to switch to the external main power supply.

[0043] In addition, the dual power intelligent switching device further includes a display screen; the display screen is communicatively connected to the controller; the cabinet 100 includes a cabinet door; the display screen is arranged on the cabinet door; the controller is further used to: display the received output voltage value of the first circuit breaker on the display screen; display the received output voltage value of the second circuit breaker on the display screen. The first circuit breaker and the second circuit breaker are both four-pole circuit breakers; the first contactor and the second contactor are both four-pole contactors.

[0044] The rest of the structure is the same as that of Example 2.

[0045] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0046] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0047] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dual power intelligent switching device, characterized in that: include, A cabinet (100), wherein the cabinet (100) is provided with a first power input terminal, a second power input terminal, a power output terminal, a first circuit breaker, a second circuit breaker, a first contactor, and a second contactor; A control module is arranged on the cabinet (100), and is used to control the opening and closing between the auxiliary output contact of the first contactor and the neutral line, and the opening and closing between the auxiliary output contact of the second contactor and the neutral line, so as to switch the external main power supply and the external backup power supply block for powering the external load.

2. The dual power intelligent switching device according to claim 1, characterized in that: The first power input terminal is used to electrically connect to an external main power supply, and the second power input terminal is used to electrically connect to an external backup power supply; the first power input terminal is electrically connected to an input contact of the first circuit breaker, The second power input terminal is electrically connected to the input contact of the second circuit breaker; The output contact of the first circuit breaker is electrically connected to the normally open input contact of the first contactor; The output contact of the second circuit breaker is electrically connected to the normally open input contact of the second contactor; The normally open output contact of the first contactor is electrically connected to the power output terminal; The normally open output contact of the second contactor is electrically connected to the power output terminal; The power output terminal is used to electrically connect to an external load; the auxiliary input contact of the first contactor is electrically connected to the output contact of the first circuit breaker, and the auxiliary input contact of the second contactor is electrically connected to the output contact of the second circuit breaker.

3. The dual power intelligent switching device according to claim 2, characterized in that: The control module comprises a controller, a sliding arm (140), a first electromagnet (150), a second electromagnet (160), a storage battery, a copper sheet (180), a first contact sheet (190), a second contact sheet (210), a third contact sheet (220) and a fourth contact sheet (230); The first contact piece (190) is electrically connected to the neutral line; the second contact piece (210) is electrically connected to the auxiliary output contact of the first contactor; the third contact piece (220) is electrically connected to the neutral line; the fourth contact piece (230) is electrically connected to the auxiliary output contact of the second contactor; The first contact piece (190) and the second contact piece (210) are located on one side of the copper sheet (180); the third contact piece (220) and the fourth contact piece (230) are located on the other side of the copper sheet (180); The copper sheet (180) is connected to one end of the sliding arm (140) through an insulating block (170); the storage battery is used to supply power to the controller, the first electromagnet (150), and the second electromagnet (160); The controller is used to control the start and stop of the first electromagnet (150) and the second electromagnet (160); the first electromagnet (150) and the second electromagnet (160) can respectively attract the sliding arm (140); when the first electromagnet (150) attracts the sliding arm (140), the copper sheet (180) is simultaneously in contact with the first contact sheet (190) and the second contact sheet (210); when the second electromagnet (160) attracts the sliding arm (140), the copper sheet (180) is simultaneously in contact with the third contact sheet (220) and the fourth contact sheet (230).

4. The dual power intelligent switching device according to claim 3, characterized in that: The control module further comprises a first slide bar (120) and a second slide bar (130); the first electromagnet (150) and the second electromagnet (160) are both located between the first slide bar (120) and the second slide bar (130); The first sliding rod (120) and the second sliding rod (130) are parallel to each other; the sliding arm (140) is slidably mounted on the first sliding rod (120) and the second sliding rod (130) respectively; the first sliding rod (120) and the second sliding rod (130) are both perpendicular to the sliding arm (140).

5. The dual power intelligent switching device according to claim 4, characterized in that: The control module also includes a base (110); the first electromagnet (150), the second electromagnet (160), the first sliding bar (120), the second sliding bar (130), the first contact piece (190), the second contact piece (210), the third contact piece (220) and the fourth contact piece (230) are all arranged on the base (110).

6. The dual power intelligent switching device according to claim 5, characterized in that: The sliding arm (140) is located between the first electromagnet (150) and the second electromagnet (160); the first contact piece (190), the second contact piece (210), the third contact piece (220) and the fourth contact piece (230) are all elastic contact pieces.

7. The dual power intelligent switching device according to claim 6, characterized in that: The control module further comprises a first voltage transformer; the first voltage transformer is communicatively connected to the controller; the first voltage transformer is used to detect the output voltage value of the first circuit breaker in real time and send it to the controller; the controller is also used to: when the output voltage value of the first circuit breaker is lower than a preset voltage value, control the first electromagnet (150) to lose power, and control the second electromagnet (160) to start.

8. The dual power intelligent switching device according to claim 7, characterized in that: The control module further comprises a second voltage transformer; the second voltage transformer is communicatively connected to the controller; the second voltage transformer is used to detect the output voltage value of the second circuit breaker in real time and send it to the controller; the controller is also used to control the second electromagnet (160) to lose power and control the first electromagnet (150) to start when the output voltage value of the second circuit breaker is lower than a preset voltage value.

9. The dual power intelligent switching device according to claim 8, characterized in that: It also includes a display screen; the display screen is communicatively connected to the controller; the cabinet (100) includes a cabinet door; the display screen is arranged on the cabinet door; the controller is also used to: display the received output voltage value of the first circuit breaker on the display screen; and display the received output voltage value of the second circuit breaker on the display screen.

10. The dual power intelligent switching device according to claim 9, characterized in that: The first circuit breaker and the second circuit breaker are both four-pole circuit breakers; the first contactor and the second contactor are both four-pole contactors; The controller is a single chip microcomputer.

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