CN219576701U - Power distribution device and power supply system - Google Patents
Power distribution device and power supply system Download PDFInfo
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- CN219576701U CN219576701U CN202320470473.2U CN202320470473U CN219576701U CN 219576701 U CN219576701 U CN 219576701U CN 202320470473 U CN202320470473 U CN 202320470473U CN 219576701 U CN219576701 U CN 219576701U
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- frame switch
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- incoming line
- switch
- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The application relates to a power distribution device and a power supply system, comprising a first incoming line frame switch, a second incoming line frame switch, an emergency incoming line frame switch, a bus connection frame switch and a power supply interconnection frame switch. The first incoming line frame switch is connected with a first power supply, the second incoming line frame switch is connected with a second power supply, the emergency incoming line frame switch is connected with an emergency power supply, the first incoming line frame switch is connected with the second incoming line frame switch through the bus connection frame switch, and the bus connection frame switch is connected with the emergency incoming line frame switch through the power supply interconnection frame switch. When the first incoming line frame switch and the second incoming line frame switch are both opened, the emergency incoming line frame switch is closed. When one of the two switches is opened, the bus connection frame switch and the power supply interconnection frame switch are both closed, and the emergency incoming line frame switch is opened. When the two incoming line frame switches are all closed, the emergency incoming line frame switch and the bus connection frame switch are both opened, and the power supply interconnection frame switch is closed. The application can realize flexible configuration and switching of the power supply.
Description
Technical Field
The application relates to the technical field of power configuration, in particular to a power distribution device and a power supply system.
Background
With the progress of technological development, unmanned power equipment such as offshore power generation is more and more, and corresponding power distribution products such as switch cabinets that need to be highly autonomous realize switching over to the power to deal with different power supply conditions.
The power supply is now commonly controlled by a PLC (Programmable Logic Controller ) to provide power distribution, with multiple power supplies individually powering multiple loads. The control switch is connected between the power supply and the load, and the on-off of the power supply circuit is controlled through the control switch, so that the power supply of each load is switched. However, when separate switch settings are performed on the routes of each power supply and load, a plurality of switch routes need to be set, the circuit setting is complex, and the power supply mode is single.
Disclosure of Invention
In view of the above, it is desirable to provide a power distribution device and a power supply system capable of flexibly switching power supply sources.
In a first aspect, the utility model provides a power distribution device, which comprises a first incoming line frame switch, a second incoming line frame switch, an emergency incoming line frame switch, a bus connection frame switch and a power supply interconnection frame switch, wherein the first incoming line frame switch is connected with a first power supply, the second incoming line frame switch is connected with a second power supply, the emergency incoming line frame switch is connected with an emergency power supply, the first incoming line frame switch is connected with the second incoming line frame switch through the bus connection frame switch, and the bus connection frame switch is connected with the emergency incoming line frame switch through the power supply interconnection frame switch;
When the first incoming line frame switch and the second incoming line frame switch are both opened, the emergency incoming line frame switch is closed;
when one of the first incoming line frame switch and the second incoming line frame switch is disconnected, both the bus connection frame switch and the power supply interconnection frame switch are closed, and the emergency incoming line frame switch is disconnected;
when the first incoming line frame switch and the second incoming line frame switch are all closed, the emergency incoming line frame switch and the bus connection frame switch are all opened, and the power supply interconnection frame switch is closed.
In one embodiment, the power supply interconnection frame switch comprises a first interconnection frame switch and a second interconnection frame switch, one end of the first interconnection frame switch is connected with a common end of the first incoming line frame switch and the bus connection frame switch, the other end of the first interconnection frame switch is connected with the emergency incoming line frame switch, one end of the second interconnection frame switch is connected with a common end of the second incoming line frame switch and the bus connection frame switch, and the other end of the second interconnection frame switch is connected with the emergency incoming line frame switch;
when one of the first wire inlet frame switch and the second wire inlet frame switch is opened or both are closed, any one of the first contact frame switch and the second contact frame switch is closed, and the other is opened.
In one embodiment, the first contact frame switch and the second contact frame switch are identical in structure.
In one embodiment, the first interconnection frame switch includes a power switch and a start-stop switch connected in sequence.
In one embodiment, the device further comprises a controller, wherein the controller is connected with the first incoming line frame switch, the second incoming line frame switch, the emergency incoming line frame switch, the bus connection frame switch and the power supply interconnection frame switch.
In one embodiment, the system further comprises a first voltage detection circuit and a second voltage detection circuit which are connected with the controller, wherein the first voltage detection circuit is connected with the common end of the first incoming line frame switch and the first power supply and is used for detecting a first voltage and sending the first voltage to the controller; the second voltage detection circuit is connected with the common end of the second incoming line frame switch and the second power supply, and is used for detecting a second voltage and sending the second voltage to the controller.
In one embodiment, if the first voltage indicates that the first power supply supplies power normally, the controller sends a closing instruction to the first incoming line frame switch;
If the second voltage indicates that the second power supply supplies power normally, the controller sends a closing instruction to the second incoming line frame switch;
if the first voltage and the second voltage indicate that the first power supply and the second power supply are powered off, the controller sends a closing instruction to the emergency incoming line frame switch, and the controller sends a switching-off instruction to the first incoming line frame switch and the second incoming line frame switch.
In one embodiment, if the first voltage indicates that the first power supply is powered off and then resumes power supply, and/or the second voltage indicates that the second power supply is powered off and then resumes power supply, the controller delays and then sends a brake-off instruction to the emergency incoming line frame switch.
In one embodiment, the first incoming line frame switch, the second incoming line frame switch, the emergency incoming line frame switch, the bus bar frame switch, and the power supply interconnection frame switch are circuit breakers.
In a second aspect, the application further provides a power supply system, which comprises a first power supply, a second power supply, an emergency power supply and the power distribution device.
The power distribution device and the power supply system comprise a first incoming line frame switch, a second incoming line frame switch, an emergency incoming line frame switch, a bus connection frame switch and a power supply interconnection frame switch. The first incoming line frame switch is connected with a first power supply, the second incoming line frame switch is connected with a second power supply, the emergency incoming line frame switch is connected with an emergency power supply, the first incoming line frame switch is connected with the second incoming line frame switch through the bus connection frame switch, and the bus connection frame switch is connected with the emergency incoming line frame switch through the power supply interconnection frame switch. When the first incoming line frame switch and the second incoming line frame switch are both opened, the emergency incoming line frame switch is closed; when one of the first wire inlet frame switch and the second wire inlet frame switch is disconnected, both the bus connection frame switch and the power supply interconnection frame switch are closed, and the emergency wire inlet frame switch is disconnected; when the first incoming line frame switch and the second incoming line frame switch are both closed, the emergency incoming line frame switch and the bus connection frame switch are both opened, and the power supply interconnection frame switch is closed. By conducting different power supplies to supply power in different switch opening and closing states, the flexible configuration and switching of the power supply are realized.
Drawings
FIG. 1 is a diagram of an application environment for a power distribution device in one embodiment;
FIG. 2 is a schematic diagram of an electrical distribution device in one embodiment;
FIG. 3 is a schematic diagram of a power distribution apparatus according to another embodiment;
FIG. 4 is a schematic diagram of the composition of a power distribution device in one embodiment;
FIG. 5 is a schematic diagram of a first link frame switch in one embodiment;
FIG. 6 is a schematic diagram of the composition of a power distribution device in another embodiment;
FIG. 7 is a schematic view of the composition of a power distribution apparatus in yet another embodiment;
fig. 8 is a schematic diagram showing the composition of a power distribution apparatus in still another embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The power distribution device 102 provided by the embodiment of the application can be applied to an application environment as shown in fig. 1. The power distribution device 102 is connected to the first power source 104, the second power source 106 and the emergency power source 108, and a first load port, a second load port and a third load port are disposed in the power distribution device 102, and each load port may be connected to a plurality of load devices or load terminals. The third load port is connected with important equipment such as emergency equipment and/or basic equipment and the like which need to ensure power supply. The first load port and the second load port may be used to connect a work load or other various loads, such as various electrical products or equipment. The first power supply 104, the second power supply 106 and the emergency power supply 108 are used for supplying power to loads connected to each load port in the power distribution device 102, and when the first power supply 104 and the second power supply 106 are normally powered or are powered off singly (the power supply is abnormal, the voltage is 0, namely, the power is off), even if both are powered off, the power distribution device 102 performs power distribution adjustment on each power supply, configures a power supply capable of normally powering the loads, and ensures normal operation of the loads. The first power source 104 and the second power source 106 are both commercial power, i.e. power frequency alternating current outputted by a power grid, and the voltage amplitude is 220V or 380V. The emergency power supply 108 supplies power to a generator, which may further be a diesel generator.
In one embodiment, as shown in fig. 2 and 3, a power distribution device 102 is provided, including a first incoming frame switch 202, a second incoming frame switch 204, an emergency incoming frame switch 206, a bus bar frame switch 208, and a power tie frame switch 210, the first incoming frame switch 202 being connected to the first power source 104, the second incoming frame switch 204 being connected to the second power source 106, the emergency incoming frame switch 206 being connected to the emergency power source 108, the first incoming frame switch 202 being connected to the second incoming frame switch 204 through the bus bar frame switch 208, the bus bar frame switch 208 being connected to the emergency incoming frame switch 206 through the power tie frame switch 210.
When both the first and second incoming frame switches 202, 204 are open, the emergency incoming frame switch 206 is closed. When one of the first and second incoming frame switches 202, 204 is open, both the parent frame switch 208 and the power interconnection frame switch 210 are closed and the emergency incoming frame switch 206 is open. When both the first and second incoming frame switches 202, 204 are closed, both the emergency incoming frame switch 206 and the parent frame switch 208 are open and the power interconnection frame switch 210 is closed.
The common end of the first incoming line frame switch 202 and the bus connection frame switch 208 is provided with a first load port, and the common end of the second incoming line frame switch 204 and the bus connection frame switch 208 is provided with a second load port, wherein the first load port and the second load port are used for connecting various loads, such as various electrical products or equipment. The common ends of the emergency incoming line frame switch 206 and the power supply interconnection frame switch 210 are provided with a third load port for connecting emergency equipment, base equipment and other equipment with larger continuous power supply requirements, such as data caching equipment, base communication equipment and the like.
Specifically, the first incoming frame switch 202 is connected to the first power source 104, and can control the on-off of a power supply line between the first power source 104 and the first load port. The second incoming line frame switch 204 is connected to the second power source 106, and can control the on-off of the power supply line between the second power source 106 and the second load port. The emergency incoming line frame switch 206 is connected to the emergency power supply 108, and can control the on-off of a power supply line between the emergency power supply 108 and the third load port. The power interconnection frame switch 210 is connected to the bus frame switch 208 and the emergency wire inlet frame switch 206, and is configured to be closed when one of the first power source 104 and the second power source 106 can normally supply power, and to supply power to a load connected to the third load port by using the first power source 104 or the second power source 106 that can normally supply power.
Further, as shown in fig. 2, the power interconnection frame switch 210 may be connected to a common terminal of the bus frame switch 208 and the first line-in frame switch 202. Alternatively, as shown in fig. 3, the power interconnection frame switch 210 may also be connected to the common terminal of the bus frame switch 208 and the second incoming line frame switch 204.
In fig. 2-3, when the first and second incoming frame switches 202 and 204 are both open, the first and second power sources 104 and 106 are not capable of supplying power to the load connected to the power distribution device 102, and at this time, the emergency incoming frame switch 206 is closed, and the emergency power source 108 supplies power to the load connected to the third load port. Optionally, the load on the third load port is emergency equipment and/or basic equipment, and needs to be continuously powered, and when the first power supply 104 and the second power supply 106 lose power, the emergency power supply 108 supplies power to the emergency equipment and/or the basic equipment, so that normal operation of the emergency equipment and/or the basic equipment is ensured. The loads on the first and second load ports are not as demanding as the loads on the third load port, and when the first and second power sources 104, 106 are de-energized, the emergency power source 108 may simultaneously power the loads of the first and second load ports while powering the loads of the third load port. The emergency power supply 108 may also only power the load of the third load port and not the loads of the first and second load ports. Further, at this time, if the power interconnection frame switch 210 and the bus frame switch 208 are both closed, the emergency power supply 108 supplies power to the loads of the first load port and the second load port. If the power tie frame switch 210 is open, the emergency power supply 108 only powers the load of the third load port. Illustratively, when the emergency power supply 108 is a diesel generator, the loads of the first load port and the second load port are industrial equipment, heavy machinery, and various high-power equipment, because the diesel generator has limited driving load capacity, the power supply interconnection frame switch 210 is turned off in this case, and the diesel generator only supplies power to the load of the third load port.
One of the first power source 104 and the second power source 106 may be powered when one of the first and second in-line frame switches 202, 204 is open. At this point the emergency line frame switch 206 is open and the load is powered by the power source connected by the closed one of the first line frame switch 202 and the second line frame switch 204. At the same time, both the parent frame switch 208 and the power supply tie frame switch 210 are closed and the power supply being powered can simultaneously power the loads on the first, second, and third load ports.
When both the first and second inlet frame switches 202, 204 are closed, both the first and second power sources 104, 106 can be powered. At this point, the emergency incoming line frame switch 206 and the bus frame switch 208 are both off, the first power source 104 supplies power to the load connected to the first load port, and the second power source 106 supplies power to the load connected to the second load port. The power connection frame switch 210 is closed and the load on the third load port is powered by one of the first power source 104 and the second power source 106. Illustratively, when the power distribution device 102 is as shown in fig. 2, the load on the third load port is powered by the first power source 104. When the power distribution device 102 is as shown in fig. 3, the load on the third load port is powered by the second power source 106. In the case that the first power source 104 and/or the second power source 106 supply power, the emergency load connected to the third load port needs to be supplied, the power supply interconnection frame switch 210 is set to connect the third load port, and when the first power source 104 and/or the second power source 106 supply power normally, the power supply interconnection frame switch 210 can be closed, and the first power source 104 or the second power source 106 supplies power to the load of the third load port.
The power distribution device 102 includes a first incoming line frame switch 202, a second incoming line frame switch 204, an emergency incoming line frame switch 206, a bus frame switch 208, and a power interconnection frame switch 210. The first incoming line frame switch is connected with the first power supply 104, the second incoming line frame switch 204 is connected with the second power supply 106, the emergency incoming line frame switch 206 is connected with the emergency power supply 108, the first incoming line frame switch 202 is connected with the second incoming line frame switch 204 through the bus connection frame switch 208, and the bus connection frame switch 208 is connected with the emergency incoming line frame switch 206 through the power supply interconnection frame switch 210. When both the first incoming line frame switch 202 and the second incoming line frame switch 204 are open, the emergency incoming line frame switch 206 is closed; when one of the first incoming line frame switch 202 and the second incoming line frame switch 204 is open, both the parent link frame switch 208 and the power supply interconnection frame switch 210 are closed, and the emergency incoming line frame switch 206 is open; when both the first and second incoming frame switches 202, 204 are closed, both the emergency incoming frame switch 206 and the parent frame switch 208 are open and the power interconnection frame switch 210 is closed. By conducting different power supplies to supply power in different switch opening and closing states, the flexible configuration and switching of the power supply are realized.
In one embodiment, as shown in fig. 4, the power interconnection frame switch 210 includes a first interconnection frame switch 402 and a second interconnection frame switch 404, where one end of the first interconnection frame switch 402 is connected to the common end of the first incoming frame switch 202 and the parent connection frame switch 208, the other end is connected to the emergency incoming frame switch 206, one end of the second interconnection frame switch 404 is connected to the common end of the second incoming frame switch 204 and the parent connection frame switch 208, and the other end is connected to the emergency incoming frame switch 206. When one of the first and second inlet frame switches 202, 204 is open or both are closed, either of the first and second tie frame switches 402, 404 is closed and the other is open.
Specifically, power supply interconnection frame switch 210 includes a first interconnection frame switch 402 and a second interconnection frame switch 404 that enable power to be supplied to a load on a third load port from a different power source. The first interconnection frame switch 402 is used to control the connection and disconnection of the power supply line between the first power source 104 and the third load port. The second coupling frame switch 404 is used to control the connection and disconnection of the power supply line between the second power source 106 and the third load port.
When the first incoming line frame switch 202 and the second incoming line frame switch 204 are both opened, the first power source 104 and the second power source 106 cannot supply power to the load connected in the power distribution device 102, at this time, the emergency incoming line frame switch 206 is closed, and the emergency power source 108 supplies power to the load connected to the third load port. Alternatively, at this point, if both the first tie frame switch 402 and the second tie frame switch 404 are open, the emergency power supply 108 only powers the load of the third load port. If either of the first tie frame switch 402 and the second tie frame switch 404 is closed, the parent frame switch 208 is also closed; or if both the first tie frame switch 402 and the second tie frame switch 404 are closed, the parent frame switch 208 is opened. The emergency power supply 108 also powers the loads of the first load port and the second load port.
One of the first power source 104 and the second power source 106 may be powered when one of the first and second in-line frame switches 202, 204 is open. At this point the emergency line frame switch 206 is open and the load is powered by the power source connected by the closed one of the first line frame switch 202 and the second line frame switch 204. At the same time, the parent frame switch 208 is closed, one or both of the first and second tie frame switches 402, 404 are closed, and the power source being supplied may simultaneously supply the loads on the first, second, and third load ports.
When both the first and second inlet frame switches 202, 204 are closed, both the first and second power sources 104, 106 can be powered. At this point, the emergency incoming line frame switch 206 and the bus frame switch 208 are both off, the first power source 104 supplies power to the load connected to the first load port, and the second power source 106 supplies power to the load connected to the second load port. One of the first and second tie frame switches 402, 404 is closed, enabling power to be supplied to the load on the third load port by the power source to which the closed tie frame switch is correspondingly connected.
In this embodiment, by setting the first interconnection frame switch 402 and the second interconnection frame switch 404, power distribution to each load end in multiple power supply environments is achieved, and power transportation is ensured. The first and second tie frame switches 402 and 404 control the power supply of the first and second power sources 104 and 106, respectively, to the load on the third load port, increasing the stability of the control of the power distribution device 102.
In one embodiment, the first linking frame switch 402 and the second linking frame switch 404 are identical in structure.
The first interconnection frame switch 402 and the second interconnection frame switch 404 are both used to connect the parent connection frame switch 208 to the emergency incoming line frame switch 206, and when the first power source 104 and/or the second power source 106 are powered, the power supply configuration is implemented for the load on the third load port. Accordingly, the first linking frame switch 402 and the second linking frame switch 404 may be identical in structure and have the same hardware configuration.
In this embodiment, the first linking frame switch 402 and the second linking frame switch 404 have the same structure, which can reduce the requirements for the types of devices during maintenance, improve the maintenance and replacement efficiency, and further improve the practicality of the power distribution device 102.
In one embodiment, as shown in FIG. 5, the first tie frame switch 402 includes a power switch 502 and a start stop switch 504 connected in sequence.
The start-stop switch 504 is used for indicating the start-stop state of the power distribution device 102, and the start-stop switch 504 may be manually switched by a worker, or the start-stop switch 504 may be controlled by a control device or a cloud command. The power switch 502 is used to control the connection and disconnection of the circuit between the first incoming line frame switch 202 and the emergency incoming line frame switch 206 under different power supply conditions.
Specifically, the first interconnection frame switch 402 includes a power switch 502 and a start-stop switch 504, where the power switch 502 and the start-stop switch 504 are connected in sequence. When the power distribution device 102 is started, the start-stop switch 504 is controlled to be closed by a worker, a control device or a cloud end instruction, and when the power distribution device 102 is stopped from being used, the start-stop switch 504 is controlled to be opened by the worker, the control device or the cloud end instruction. The power switch 502 controls the on-off of the circuit connection between the first wire frame switch 202 and the emergency wire frame switch 206.
Alternatively, the power switch 502 and the start-stop switch 504 are not unique, and it may be that the power switch 502 is connected to the start-stop switch 504 and the bus frame switch 208, and the start-stop switch 504 is connected to the emergency incoming line frame switch 206. Alternatively, the start-stop switch 504 is connected to the power supply switch 502 and the bus frame switch 208, and the power supply switch 502 is connected to the emergency incoming line frame switch 206.
Further, if the second linking frame switch 404 is configured identically to the first linking frame switch 402, the second linking frame switch 404 includes a second power switch and a second start-stop switch that are sequentially connected, the second power switch being configured identically to the power switch 502 in the first linking frame switch 402, the second start-stop switch being configured identically to the start-stop switch 504 in the first linking frame switch 402. The second power switch and the second start-stop switch may be disposed at a position where the second power switch is connected to the second start-stop switch and the bus frame switch 208, and the second start-stop switch is connected to the emergency incoming line frame switch 206. A second start-stop switch may also be connected to the second power switch and the bus frame switch 208, the second power switch being connected to the emergency incoming line frame switch 206.
In this embodiment, the on-off switch 504 in the first interconnection frame switch 402 controls the use state of the whole power distribution device 102, and the power supply switch 502 controls the on-off of the circuit connection between the first wire inlet frame switch 202 and the emergency wire inlet frame switch 206, so as to increase the safety and practicality of the power distribution device 102.
In one embodiment, as shown in fig. 6, the power distribution device 102 further includes a controller 602, the controller 602 connecting the first incoming line frame switch 202, the second incoming line frame switch 204, the emergency incoming line frame switch 206, the bus bar frame switch 208, and the power connection frame switch 210.
Specifically, the controller 602 may output a control instruction to control the opening and closing of each switch, where the control instruction includes a switching-off instruction and a switching-on instruction, and the controller 602 may control the opening and closing states of the first incoming line frame switch 202, the second incoming line frame switch 204, the emergency incoming line frame switch 206, the bus connection frame switch 208, and the power supply interconnection frame switch 210 that are connected to each other. Typically, the opening command is used to control the switch to open, opening the circuit across the switch. The closing instruction is used for controlling the switch to be closed and conducting the circuits at the two ends of the switch.
The controller 602 may be a PLC controller or a control chip such as a single chip microcomputer. In large-scale industrial control, a PLC controller is usually selected for control. The PLC controller uses the storage logic to replace the wiring logic, so that the wiring outside the controller is greatly reduced, and the PLC controller has the advantages of short design and construction period and convenience in maintenance.
In one embodiment, as shown in fig. 7, the power distribution device 102 further includes a first voltage detection circuit 702 and a second voltage detection circuit 704 coupled to the controller 602. The first voltage detection circuit 702 is connected to the common terminal of the first incoming line frame switch 202 and the first power source 104, and is configured to detect the first voltage and send the first voltage to the controller 602. The second voltage detection circuit 704 is connected to the common terminal of the second incoming line frame switch 204 and the second power source 106, and is configured to detect the second voltage and send the second voltage to the controller 602.
Specifically, the first voltage detection circuit 702 is connected to the common terminal of the first incoming line frame switch 202 and the first power source 104, and is configured to detect the voltage of the first power source 104, i.e. the first voltage. The first voltage is sent to the controller 602, so that the controller 602 outputs a corresponding control instruction to control each switch according to the received first voltage. The second voltage detection circuit 704 is connected to the common terminal of the second incoming line frame switch 204 and the second power source 106, and is configured to detect a voltage of the second power source 106, i.e. a second voltage. The second voltage is sent to the controller 602, so that the controller 602 outputs a corresponding control instruction to control each switch according to the received second voltage.
The first voltage detection circuit 702 and the second voltage detection circuit 704 may be voltage sensors, voltage relays, and phase sequence relays, for example.
In this embodiment, by setting the corresponding voltage detection circuits to detect the states of the first power source 104 and the second power source 106, it can be accurately determined whether the first power source 104 and the second power source 106 meet the condition of supplying power to the power distribution device 102, so as to facilitate adjustment of the power distribution states of the first power source 104 and the second power source 106 in the power distribution device 102. The stability of use of the power distribution device 102 is improved.
In one embodiment, as shown in fig. 7, if the first voltage indicates that the first power source 104 is supplying power normally, the controller 602 sends a closing command to the first incoming line frame switch 202. If the second voltage indicates that the second power source 106 is supplying power normally, the controller 602 sends a closing command to the second incoming line frame switch 204. If the first voltage and the second voltage indicate that both the first power source 104 and the second power source 106 are powered off, the controller 602 sends a closing command to the emergency incoming line frame switch 206, and the controller 602 sends a breaking command to the first incoming line frame switch 202 and the second incoming line frame switch 204.
When the first voltage detected by the first voltage detecting circuit 702 is within the preset normal power supply range, the first power supply 104 is indicated to be in a normal power supply state; when the first voltage detected by the first voltage detecting circuit 702 is outside the preset normal power supply range, the first power supply 104 is indicated to be in a power-off state. When the second voltage detected by the second voltage detecting circuit 704 is within the preset normal power supply range, the second power supply 106 is indicated to be in a normal power supply state; when the second voltage detected by the second voltage detecting circuit 704 is outside the preset normal power supply range, the second power supply 106 is indicated to be in a power-off state.
When the first power supply 104 supplies power normally, the controller 602 sends a closing command to the first incoming line frame switch 202, the first incoming line frame switch 202 is closed, the first power supply 104 and the first load port are turned on, and the first power supply 104 supplies power to the load connected to the first load port. Further, the controller 602 further sends a closing command to the power supply interconnection frame switch 210 to turn on the first power supply 104 and the third load port, and the first power supply 104 further supplies power to the load connected to the third load port.
Optionally, when the first power source 104 supplies power normally, if the second power source 106 loses power, the controller 602 sends a closing command to the bus frame switch 208, and the first power source 104 supplies power to the loads on the first load port, the second load port and the third load port. On the basis of normal power supply of the first power supply 104, if the second power supply 106 supplies power normally, the controller 602 sends a switching-off command to the bus frame switch 208 to disconnect the circuit connection between the second incoming frame switch 204 and the power supply connection frame switch 210. The first power supply 104 now powers the loads on the first and third load ports and the second power supply 106 powers the loads on the second load port.
When the second power supply 106 supplies power normally, the controller 602 sends a closing command to the second incoming line frame switch 204, the second incoming line frame switch 204 is closed, the second power supply 106 is turned on to supply power to the load connected to the second load port, and the second power supply 106 supplies power to the load connected to the second load port. Further, the controller 602 further sends a closing command to the power supply interconnection frame switch 210 to turn on the second power supply 106 and the third load port, and the second power supply 106 further supplies power to the load connected to the third load port.
Optionally, when the second power supply 106 supplies power normally, if the first power supply 104 loses power, the controller 602 sends a closing command to the bus frame switch 208, and the second power supply 106 supplies power to the loads on the first load port, the second load port, and the third load port. When the second power source 106 supplies power normally, if the first power source 104 supplies power normally, the controller 602 sends a switching-off command to the bus frame switch 208 to disconnect the circuit connection between the second incoming frame switch 204 and the power supply connection frame switch 210. The first power supply 104 supplies power to the loads on the first load port and the third load port, and the second power supply 106 supplies power to the loads on the second load port.
It can be seen that in the above case, when the first power source 104 and the second power source 106 are both normally powered, the controller 602 sends a switching-off command to the bus frame switch 208, and both disconnect the circuit connection between the second incoming frame switch 204 and the power supply interconnection frame switch 210. In essence, when the connection of the power connection frame switch 210 in the power distribution device 102 is as shown in fig. 2, the load on the third load port is powered by the first power source 104 by default; when the connection of the power interconnection frame switch 210 in the power distribution device 102 is as shown in fig. 3, the load on the third load port is powered by the second power source 106 by default. When the power interconnection frame switch 210 in the power distribution device 102 includes a first interconnection frame switch 402 and a second interconnection frame switch 404, and the connection is as shown in fig. 4, the first interconnection frame switch 402 is closed by default, the second interconnection frame switch 404 is opened, and the load on the third load port is powered by the first power source 104. However, when the first linking frame switch 402 fails and cannot be closed, the controller 602 will send a closing command to the second linking frame switch 404, and the second power source 106 supplies power to the load on the third load port. If the second voltage indicates that the second power source 106 is powered off at this time, the controller 602 will also send a closing command to the bus frame switch 208.
When the controller 602 receives the power-off instructions of the first power source 104 and the second power source 106 respectively and simultaneously, a closing instruction is correspondingly sent to the emergency incoming line frame switch 206, the emergency incoming line frame switch 206 is closed, the emergency power source 108 and the third load port are conducted, and the emergency power source 108 supplies power to the load connected with the third load port.
Alternatively, the power connection frame switch 210 may be closed at this time, and the emergency power source 108 may supply power to the loads of the first load port and/or the second load port; the power tie frame switch 210 may also be turned off and the emergency power supply 108 only powers the load on the third load port. Further, to ensure operation of the emergency device and/or base device on the third load port that is more important than the normal load, the power connection frame switch 210 is turned off by default.
The first voltage detection circuit 702 and the second voltage detection circuit 704 may be voltage relays, or phase sequence relays, for example.
In this embodiment, the first voltage detection circuit 702 and the second voltage detection circuit 704, which are connected to the first power supply 104 and the second power supply 106, detect the states of the power supplies, and the controller 602 controls the on/off of each switch according to the states of each power supply, so as to adjust the power supply configuration, and ensure the operation of the emergency equipment or the basic equipment. The configuration accuracy, convenience of use, and safety of the power distribution device 102 are improved.
In one embodiment, the controller 602 delays sending a brake off command to the emergency line frame switch 206 if the first voltage indicates that the first power source 104 is powered off and/or the second voltage indicates that the second power source 106 is powered off.
Specifically, whether the first power source 104 is powered off and the second power source 106 is powered off and the two power sources are powered off simultaneously, the controller 602 sends the opening command to the emergency incoming frame switch 206 after a set delay time.
When the first power source 104 is powered off and power is restored, the controller 602 sends a closing command to the first incoming line frame switch 202 and the bus frame switch 208, and the first power source 104 supplies power to the loads on the first load port and the second load port. After the set delay time is reached, the controller 602 sends a brake-off command to the emergency incoming line frame switch 206, and simultaneously sends a brake-on command to the power supply interconnection frame switch 210, so that the first power supply 104 supplies power to the loads on the first load port, the second load port and the third load port.
When the second power supply 106 is powered off and power is restored, the controller 602 sends a closing command to the second incoming line frame switch 204 and the bus frame switch 208, and the second power supply 106 supplies power to the first load port and the load on the second load port. After the set delay time is reached, the controller 602 sends a brake-off command to the emergency incoming line frame switch 206, and simultaneously sends a brake-on command to the power supply interconnection frame switch 210, so that the second power supply 106 supplies power to the loads on the first load port, the second load port and the third load port.
When both the first power source 104 and the second power source 106 are powered off and then simultaneously resume power supply, the controller 602 sends a closing command to the first incoming line frame switch 202 and the second incoming line frame switch 204 and sends a opening command to the bus frame switch 208. The load on the first load port is powered by the first power supply 104 and the load on the second load port is powered by the second power supply 106. After the set delay time is reached, the controller 602 sends a brake-off command to the emergency incoming line frame switch 206, and simultaneously sends a brake-on command to the power supply interconnection frame switch 210, so that the normal power supply configuration is restored.
When one of the first power source 104 and the second power source 106 resumes power supply, the controller 602 sends a closing instruction to the incoming line frame switch and the bus frame switch connected to the power source that resumes power supply within a set delay time, and when the other power source resumes power supply, the controller 602 sends a closing instruction to the incoming line frame switch connected to the other power source that resumes power supply and sends a separating instruction to the bus frame switch. Illustratively, when the first power source 104 resumes power, the controller 602 sends a closing command to the first inlet frame switch 202 and the parent frame switch 208 to power the loads on the first load port and the second load port by the first power source 104. During the set time, the second power supply 106 resumes power supply, the controller 602 sends a closing command to the second incoming line frame switch 204, and sends a separating command to the bus frame switch 208, and the first power supply 104 and the second power supply 106 supply power to the loads on the first load port and the second load port, respectively.
Alternatively, the set delay time may be set arbitrarily by a worker, so that the power supply that resumes the power supply after the delay time needs to be ensured as much as possible can stably supply the power, and the energy of the emergency power supply 108 is not wasted. For example 5 minutes.
In this embodiment, the situation that power is restored after power failure is handled, and by setting a delay time and then switching to power supply of the first power supply 104 and the second power supply 106, the stability of power supply of emergency/basic equipment on the third load port is ensured, the influence on important loads on the third load port caused by unstable situations such as unstable voltage or re-power failure which may exist when the power supply just restores power supply is avoided, and stable and continuous operation of the emergency/basic equipment can be ensured.
The current and voltage input by the first power source 104 and the second power source 106 in the power distribution device 102 are large, and the on-off control of each switch should be sensitive and convenient due to the requirement of power supply configuration, so that the use performance of the power distribution device 102 is also concerned with the selection of each switch. In one embodiment, the first incoming line frame switch 202, the second incoming line frame switch 204, the emergency incoming line frame switch 206, the parent frame switch 208, and the power interconnection frame switch 210 are circuit breakers. A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions, and closing, carrying and breaking a current under abnormal circuit conditions within a prescribed time. When the circuit breaker is used, the accident load can be disconnected when the switching of the power supply configuration and the on-off control of each circuit are realized, the circuit breaker can be matched with other circuit protection devices in the circuit or safety protection devices in the load, and the protection circuit and the electricity are regulated together when the electric energy abnormality occurs in the circuit, so that the effect of protecting electric equipment or circuits is achieved.
In order to better understand the above solution, the following detailed explanation is made in connection with a specific embodiment in connection with the application scenario shown in fig. 1.
In one embodiment, the power distribution device 102 and its environment of use are shown in FIG. 8. The first power source 104 is a mains supply "1#". The first voltage detection circuit 702 is a first voltage relay. The second power supply 106 is a mains supply "2#". The second voltage detection circuit 704 is a second voltage relay. The emergency power supply 108 is labeled "G" for the lower left Fang Zifu, in this embodiment the emergency power supply 108 is a diesel generator. The power supply includes a first incoming line frame switch 202, a second incoming line frame switch 204, an emergency incoming line frame switch 206, a bus frame switch 208, and a power supply tie frame switch 210. The first incoming frame switch 202 is a circuit breaker labeled QF4 (1D-1), the second incoming frame switch 204 is a circuit breaker labeled QF2 (7D-1), the emergency incoming frame switch 206 is a circuit breaker labeled QF6 (8D-1), and the parent frame switch 208 is a circuit breaker labeled QF3 (4D). The power interconnection frame switch 210 includes a first interconnection frame switch 402 and a second interconnection frame switch 404, the first interconnection frame switch 402 includes a power switch 502 and a start-stop switch 504, the power switch 502 is a circuit breaker labeled QF1 (1D-2), and the start-stop switch 504 is a circuit breaker labeled QF8 (8D-2). The second linking frame switch 404 is identical in structure to the first linking frame switch 402, and includes a second power supply switch, which is a circuit breaker labeled QF5 (7D-2), and a second start-stop switch, which is a circuit breaker labeled QF7 (12D-1). A first load port is provided at the circuit labeled "I" to which a normal load is connected. A second load port is provided at the circuit labeled "II" to which a normal load is connected. A third load port is provided at the circuit labeled "iii" to which critical loads such as emergency equipment are connected. Wherein, first power 104 access, first voltage relay, circuit breaker QF4 (1D-1), second power 106 access, second voltage relay, circuit breaker QF2 (7D-1), circuit breaker QF3 (4D), circuit breaker QF1 (1D-2) and circuit breaker QF5 (7D-2) hardware sets up on the main switchboard, and emergency power 108 access, circuit breaker QF6 (8D-1), circuit breaker QF8 (8D-2) and circuit breaker QF7 (12D-1) set up on the emergency switchboard. The power distribution device 102 further includes a controller 602, not shown, that is a PLC controller, that connects all of the circuit breakers and two voltage detection circuits.
During the power supply, first, circuit breaker QF8 (8D-2) and circuit breaker QF7 (12D-1) are closed, indicating that the power distribution device 102 is enabled. When the commercial power '1#' and the commercial power '2#' are in normal operation, the PLC controls the breaker QF4 (1D-1), the breaker QF2 (7D-1) and the breaker QF1 (1D-2) to be closed, and the breaker QF3 (4D), the breaker QF5 (7D-2) and the breaker QF6 (8D-1) to be opened. At the moment, the loads at the positions of 'I' and 'III' are supplied by the mains supply '1#' and the loads at the position of 'II' are supplied by the mains supply '2#'. When the PLC detects that the breaker QF1 (1D-2) is closed abnormally, the breaker QF5 (7D-2) is closed, and the breaker QF1 (1D-2) is opened. At the moment, the load at the position of 'I' is powered by the commercial power '1#', and the loads at the positions of 'II' and 'III' are powered by the commercial power '2#'.
When the commercial power '1#' is powered off and the commercial power '2#' is in normal operation, the PLC controls the breaker QF2 (7D-1), the breaker QF3 (4D) and the breaker QF5 (7D-2) to be closed, and the breaker QF4 (1D-1), the breaker QF1 (1D-2) and the breaker QF6 (8D-1) to be opened. The loads at positions "I", "II" and "III" are supplied by the mains supply "2 #". When the commercial power '1#' is in normal operation and the commercial power '2#' is in power failure, the PLC controls the breaker QF4 (1D-1), the breaker QF1 (1D-2) and the breaker QF3 (4D) to be closed, and the breaker QF2 (7D-1), the breaker QF5 (7D-2) and the breaker QF6 (8D-1) to be opened. The loads at positions "I", "II" and "III" are supplied by the mains supply "1 #". When both the commercial power '1#' and the commercial power '2#' are powered off, the breaker QF6 (8D-1) is closed, and the PLC controls the breaker QF4 (1D-1), the breaker QF2 (7D-1), the breaker QF3 (4D), the breaker QF1 (1D-2) and the breaker QF5 (7D-2) to be opened. At this time, the load at the position "III" is powered by the diesel generator.
When the commercial power '1#' and the commercial power '2#' are both powered off and the commercial power '1#' is powered back, the PLC controls the breaker QF4 (1D-1) and the breaker QF3 (4D) to be closed, and the breaker QF2 (7D-1), the breaker QF5 (7D-2) and the breaker QF1 (1D-2) to be opened. At the moment, the commercial power '1#' supplies power to the loads at the 'I' and 'II', and the diesel generator supplies power to the load at the 'III'. After 5 minutes, the PLC controls the breaker QF1 (1D-2) to be closed and the breaker QF6 (8D-1) to be opened. If the breaker QF1 (1D-2) is abnormally closed, the breaker QF5 (7D-2) is closed. The loads at positions "I", "II" and "III" are supplied by the mains supply "1 #". If the commercial power '2#' is restored within 5 minutes, the PLC controls the breaker QF2 (7D-1) to be closed and the breaker QF3 (4D) to be opened. At the moment, the commercial power 1# supplies power to the load at the position of I, the commercial power 2# supplies power to the load at the position of II, and the diesel generator supplies power to the load at the position of III. After 5 minutes, the PLC controls the breaker QF1 (1D-2) to be closed and the breaker QF6 (8D-1) to be opened. If the breaker QF1 (1D-2) is abnormally closed, the breaker QF5 (7D-2) is closed. At the moment, the loads at the positions of 'I' and 'III' are supplied by the mains supply '1#' and the loads at the position of 'II' are supplied by the mains supply '2#'.
When the commercial power '1#' and the commercial power '2#' are both powered off and the commercial power '2#' is powered back, the PLC controls the breaker QF2 (7D-1) and the breaker QF3 (4D) to be closed, and the breaker QF4 (1D-1), the breaker QF5 (7D-2) and the breaker QF1 (1D-2) to be opened. At the moment, the commercial power '2#' supplies power to the loads at the 'I' and 'II', and the diesel generator supplies power to the load at the 'III'. After 5 minutes, the PLC controls the breaker QF1 (1D-2) to be closed and the breaker QF6 (8D-1) to be opened. If the breaker QF1 (1D-2) is abnormally closed, the breaker QF5 (7D-2) is closed. The loads at positions "I", "II" and "III" are supplied by the mains supply "2 #". If the commercial power '1#' is restored to supply power within 5 minutes, the PLC controls the breaker QF4 (1D-1) to be closed, and the breaker QF3 (4D) is opened. At the moment, the commercial power 1# supplies power to the load at the position of I, the commercial power 2# supplies power to the load at the position of II, and the diesel generator supplies power to the load at the position of III. After 5 minutes, the PLC controls the breaker QF1 (1D-2) to be closed and the breaker QF6 (8D-1) to be opened. If the breaker QF1 (1D-2) is abnormally closed, the breaker QF5 (7D-2) is closed. At the moment, the loads at the positions of 'I' and 'III' are supplied by the mains supply '1#' and the loads at the position of 'II' are supplied by the mains supply '2#'.
In the embodiment, the automatic switching function between the power supplies is realized through the PLC, and when the power supply fails, the automatic switching between two paths of commercial power and one path of diesel generator can be realized, so that the reliability of power supply is ensured. The power distribution device does not need a worker to conduct manual switching of the circuit breaker in the operation process, automatic switching between power supplies can be completely achieved when a common power supply fails, the possibility of misoperation of the worker is avoided, personal safety of the operator is guaranteed, and the reliability of electricity utilization is greatly improved. The power quality of the user side and the property safety of the user are ensured, and the current situation of long-time power failure caused by power failure is effectively solved.
Based on the same technical conception, the embodiment of the application also provides a power supply system for realizing the power distribution device. The implementation of the system to solve the problem is similar to that described in the above device, so the specific limitation of one or more embodiments of the power supply system provided below may be referred to the limitation of the power distribution device hereinabove, and will not be repeated here.
In one embodiment, as shown in FIG. 1, a power supply system is provided that includes a first power source 104, a second power source 106, an emergency power source 108, and a power distribution device 102 as described above. The power distribution device 102 is connected to a first power source 104, a second power source 106 and an emergency power source 108, and a first load port, a second load port and a third load port are arranged in the power distribution device 102, and each load port can be connected to a plurality of load devices or load terminals. The third load port is connected with important equipment such as emergency equipment and/or basic equipment and the like which need to ensure power supply. The first load port and the second load port may be used to connect a work load or other various loads, such as various electrical products or equipment. The first power supply 104, the second power supply 106 and the emergency power supply 108 are used for supplying power to loads connected to each load port in the power distribution device 102, and when the first power supply 104 and the second power supply 106 are normally powered or are powered off singly (the power supply is abnormal, the voltage is 0, namely, the power is off), even if both are powered off, the power distribution device 102 performs power distribution regulation on each power supply, and the power supply capable of normally supplying power is configured to ensure the normal operation of each load.
The first power source 104 and the second power source 106 are both commercial power, i.e. power frequency alternating current outputted by a power grid, and the voltage amplitude is 220V or 380V. The emergency power supply 108 is a diesel generator.
The power supply system includes a first power source 104, a second power source 106, an emergency power source 108, and a power distribution device 102, wherein the power distribution device 102 includes a first incoming line frame switch 202, a second incoming line frame switch 204, an emergency incoming line frame switch 206, a bus bar frame switch 208, and a power supply tie frame switch 210. The first incoming line frame switch is connected with the first power supply 104, the second incoming line frame switch 204 is connected with the second power supply 106, the emergency incoming line frame switch 206 is connected with the emergency power supply 108, the first incoming line frame switch 202 is connected with the second incoming line frame switch 204 through the bus connection frame switch 208, and the bus connection frame switch 208 is connected with the emergency incoming line frame switch 206 through the power supply interconnection frame switch 210. When both the first incoming line frame switch 202 and the second incoming line frame switch 204 are open, the emergency incoming line frame switch 206 is closed; when one of the first incoming line frame switch 202 and the second incoming line frame switch 204 is open, both the parent link frame switch 208 and the power supply interconnection frame switch 210 are closed, and the emergency incoming line frame switch 206 is open; when both the first and second incoming frame switches 202, 204 are closed, both the emergency incoming frame switch 206 and the parent frame switch 208 are open and the power interconnection frame switch 210 is closed. By conducting different power supplies to supply power in different switch opening and closing states, the flexible configuration and switching of the power supply are realized.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. The power distribution device is characterized by comprising a first incoming line frame switch, a second incoming line frame switch, an emergency incoming line frame switch, a bus connection frame switch and a power supply interconnection frame switch, wherein the first incoming line frame switch is connected with a first power supply, the second incoming line frame switch is connected with a second power supply, the emergency incoming line frame switch is connected with an emergency power supply, the first incoming line frame switch is connected with the second incoming line frame switch through the bus connection frame switch, and the bus connection frame switch is connected with the emergency incoming line frame switch through the power supply interconnection frame switch;
When the first incoming line frame switch and the second incoming line frame switch are both opened, the emergency incoming line frame switch is closed;
when one of the first incoming line frame switch and the second incoming line frame switch is disconnected, both the bus connection frame switch and the power supply interconnection frame switch are closed, and the emergency incoming line frame switch is disconnected;
when the first incoming line frame switch and the second incoming line frame switch are all closed, the emergency incoming line frame switch and the bus connection frame switch are all opened, and the power supply interconnection frame switch is closed.
2. The electrical distribution device of claim 1, wherein the power interconnection frame switch comprises a first interconnection frame switch and a second interconnection frame switch, one end of the first interconnection frame switch is connected to a common end of the first incoming frame switch and the parent connection frame switch, the other end is connected to the emergency incoming frame switch, one end of the second interconnection frame switch is connected to a common end of the second incoming frame switch and the parent connection frame switch, and the other end is connected to the emergency incoming frame switch;
when one of the first wire inlet frame switch and the second wire inlet frame switch is opened or both are closed, any one of the first contact frame switch and the second contact frame switch is closed, and the other is opened.
3. The electrical distribution device of claim 2, wherein the first tie frame switch and the second tie frame switch are identical in structure.
4. The electrical distribution device of claim 2, wherein the first tie frame switch comprises a power switch and a start-stop switch connected in sequence.
5. The electrical distribution device of claim 1, further comprising a controller connecting the first incoming line frame switch, the second incoming line frame switch, the emergency incoming line frame switch, the bus bar frame switch, and the power connection frame switch.
6. The electrical distribution device of claim 5, further comprising a first voltage detection circuit and a second voltage detection circuit connected to the controller, the first voltage detection circuit being connected to a common terminal of the first incoming frame switch and the first power source for detecting a first voltage and sending to the controller; the second voltage detection circuit is connected with the common end of the second incoming line frame switch and the second power supply, and is used for detecting a second voltage and sending the second voltage to the controller.
7. The electrical distribution device of claim 1, wherein the first incoming line frame switch, the second incoming line frame switch, the emergency incoming line frame switch, the bus bar frame switch, and the power connection frame switch are circuit breakers.
8. A power supply system comprising a first power source, a second power source, an emergency power source and a power distribution device as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320470473.2U CN219576701U (en) | 2023-03-13 | 2023-03-13 | Power distribution device and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320470473.2U CN219576701U (en) | 2023-03-13 | 2023-03-13 | Power distribution device and power supply system |
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| CN219576701U true CN219576701U (en) | 2023-08-22 |
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