CN111244787A

CN111244787A - Distribution box

Info

Publication number: CN111244787A
Application number: CN202010041239.9A
Authority: CN
Inventors: 孙巍巍
Original assignee: Tianjin Zhongli Shendun Electronics Technology Co Ltd
Current assignee: Tianjin Zhongli Shendun Electronics Technology Co Ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-06-05

Abstract

The distribution box comprises a box body and a box door, wherein the box body is hinged with the box door; the box body comprises a multi-loop control terminal, a main branch circuit breaker, a standby branch circuit breaker, a main branch current transformer, a standby branch current transformer, a main branch contactor, a standby branch contactor and a power module; the incoming line of the box body is divided into at least two branches, namely a main branch and a standby branch, so that the reliability of the distribution box is improved; the invention can realize local and remote protection, control, monitoring and management of each part of the distribution box, can carry out intelligent control and fault alarm on a distribution system, increases a manual operation display unit to improve the safety of the distribution box, is convenient to maintain, has high structure modularization degree of each part of the distribution box, good safety, high reliability, high integration degree and intelligent degree, is convenient to assemble, maintain and monitor and control, has better controllability and expandability, and can meet the increasingly high power distribution and power control requirements of users.

Description

Distribution box

Technical Field

The invention belongs to the technical field of power distribution equipment, and relates to a distribution box.

Background

The distribution box is an important component of power management and electrical control, particularly a traditional power distribution box, equipment such as a circuit breaker, a current transformer, a contactor, a fuse and the like are usually and simply arranged in a distribution box body and can meet the requirement of a user on distribution, but some electric equipment needs a distribution system to have higher reliability and the capability of diagnosing faults in advance along with the increasing improvement of the user on the distribution requirement at present, and the traditional distribution box is not suitable for intelligent control on distribution on-off because the traditional distribution box has the problem that the traditional distribution box cannot meet the requirement of the user on distribution; on the other hand, the traditional distribution box has poor controllability and expandability, low integration level, poor reliability and low intelligent degree, and is difficult to meet the increasingly high demand of users on power distribution. Therefore, there is a need to invent a new type of distribution box to solve the above problems.

Disclosure of Invention

The invention aims to provide a distribution box, which solves the problems of the existing distribution box, enables the structures of all parts of the distribution box to be modularized, has good safety, high reliability and high integration level and intelligent degree, is convenient to assemble, maintain, monitor and control, has better controllability and expandability and meets the increasingly high distribution requirements of users.

In order to achieve the above object, an embodiment of the present invention first provides a distribution box, which includes a box body and a box door, wherein the box body and the box door are hinged; the box body comprises a multi-loop control terminal, a main branch circuit breaker, a standby branch circuit breaker, a main branch current transformer, a standby branch current transformer, a main branch contactor, a standby branch contactor and a power module; the incoming line of the box body is divided into at least two branch circuits including a main branch circuit and a standby branch circuit, the main branch circuit incoming line is connected to the main branch circuit breaker and penetrates through the main branch circuit current transformer to be connected to the main branch contactor, and the standby branch circuit incoming line is connected to the standby branch circuit breaker and penetrates through the standby branch circuit current transformer to be connected to the standby branch circuit contactor; the main branch current transformer and the standby branch current transformer acquire signals and are respectively connected to the multi-loop control terminal; the main branch circuit breaker and the standby branch circuit breaker are respectively connected to the multi-loop control terminal; normally open contacts of the main branch contactor and the standby branch contactor are connected to the multi-loop control terminal, and the multi-loop control terminal monitors, controls, protects and logically controls two branches; and the power supply module is electrically connected with the multi-loop control terminal and supplies power to the multi-loop control terminal.

Preferably, the power module output is DC 24V.

In the power distribution box provided by the invention, the box body also comprises an incoming line terminal, an incoming line breaker and an incoming line current transformer; an incoming line of the box body is connected with the incoming line circuit breaker and penetrates through the incoming line current transformer to be divided into at least two branches which are respectively connected with the main branch circuit breaker and the standby branch circuit breaker; the incoming line current transformer acquires signals and is connected to the incoming line terminal; the three-phase electric signals at the outgoing line side of the incoming line breaker are connected to the incoming line terminal and the multi-loop control terminal through cables; the inlet wire terminal monitors, controls and protects the inlet wire loop.

Optionally, the distribution box further comprises a display terminal and an expansion module; the incoming line of the power supply module is connected with the outgoing line end of the incoming line breaker, and the outgoing line of the power supply module is respectively connected with the incoming line terminal, the multi-loop control terminal and the display terminal and provides power for the equipment; the display terminal is also respectively connected with the incoming line terminal and the multi-loop control terminal and used for displaying power utilization information of the distribution box and setting human-computer interaction parameters; and the expansion module is in communication connection with the multi-loop control terminal and is used for expanding input and output quantity.

Optionally, the power distribution box provided by the invention further comprises an operation display device, wherein the operation display device comprises a main branch manual start-stop component and a standby branch manual start-stop component; through manual opening of main tributary way stops the part and realizes the inlet wire circuit breaker with the main tributary contactor is connected, through the manual opening of branch of being equipped with stops the part and realizes the inlet wire circuit breaker with be connected of branch contactor, thereby it is right to realize the main tributary contactor with be equipped with the manual on-off control of branch contactor, thereby realize external load or electric operation unit control, can also manually promptly open when the block terminal appears unusually simultaneously and stop the operation, avoid appearing the incident.

Optionally, the incoming line breaker is provided with a shunt tripping and/or an auxiliary contact, and the shunt tripping and/or the auxiliary contact of the incoming line breaker is connected to the incoming line terminal; the main branch circuit breaker and the standby branch circuit breaker are respectively provided with shunt tripping and/or auxiliary contacts, and the shunt tripping and the auxiliary contacts of the main branch circuit breaker and the standby branch circuit breaker are connected to the multi-loop control terminal. The state monitoring and control of the circuit breakers are realized by connecting shunt tripping and/or auxiliary contacts of the components such as the incoming line circuit breaker, the main branch circuit breaker, the standby branch circuit breaker and the like, so that the control and protection functions of the distribution box are realized.

Optionally, the box still includes the fuse, the fuse is established ties and is inserted inlet wire circuit breaker with between the inlet wire terminal inlet wire circuit breaker with between the multi-loop control terminal inlet wire circuit breaker with between the power module inlet wire circuit breaker with at least in the circuit between the operation display device is all the way the realization to the overcurrent protection function of block terminal, prevents the incident.

Optionally, the display terminal is externally connected with at least one of a processor, a monitoring host and an upper computer.

Optionally, the screen of the display terminal is one of a touch screen, a liquid crystal screen, an LED screen, and an OLED screen.

Optionally, the box further includes an intermediate relay, where the intermediate relay receives an external control signal and is connected to at least one of the main branch circuit breaker, the standby branch circuit breaker, the main branch contactor, and the standby branch contactor to realize on-off control of the main branch circuit breaker, the standby branch circuit breaker, the main branch contactor, and the standby branch contactor; the intermediate relay is connected with the multi-loop control terminal, and the multi-loop control terminal acquires a state signal of the intermediate relay.

Furthermore, the multi-loop control terminal comprises a protection control unit, a CPU unit, a communication unit, a switching value input and output unit, a voltage and current signal acquisition unit, a power supply unit and a contactor control unit; the CPU unit is respectively and electrically connected with the protection control unit, the communication unit, the switching value input/output unit, the voltage and current signal acquisition unit, the power supply unit and the contactor control unit for various electric signal input/output and logic calculation and judgment; the power supply unit is electrically connected with the protection control unit, the CPU unit, the communication unit, the switching value input and output unit, the voltage and current signal acquisition unit and the contactor control unit directly or through voltage conversion respectively for power supply of the units.

In the distribution box provided by the invention, the multi-loop control terminal is provided with at least one of a 485 communication interface, a CAN communication interface, a power module interface, a voltage signal interface, a switching value input/output interface, a current signal interface, a circuit breaker interface and a contactor interface.

The distribution box has the beneficial effects that: the multi-loop control terminal, the wire inlet terminal and the display terminal are added in the distribution box to monitor and control a circuit breaker, a current transformer, a contactor and the like in the box body, so that the local and remote protection, control, monitoring and management in the power control field by utilizing the distribution box are realized, and the intelligent control and fault alarm can be carried out on a distribution system; the automatic switching of the distribution box is realized through the logic judgment of the multi-loop control terminal, the digital and intelligent judgment control is realized through setting the switching conditions, and the digital control has the advantages of quick response, higher accuracy and larger application range; the reliability of the distribution box is greatly improved by adopting the design mode of the main branch and the standby branch, and the distribution box has high modularization degree of each part structure, good safety and high reliability; the manual intervention degree is increased by setting the manual operation display part, manual debugging and emergency stop can be realized, safety accidents are prevented, and the safety is higher; through the setting of auxiliary relay, can receive external input signal to realize the divide-shut brake control to contactor or circuit breaker, thereby realize complicated logic control. The distribution box is high in integration level and intelligence degree, convenient to assemble, maintain and monitor and control, better in controllability and expandability and capable of meeting the increasingly high distribution and power control requirements of users.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.

Fig. 1 is a schematic structural diagram of a distribution box according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a door of a distribution box according to a first embodiment of the present invention;

fig. 3 is a schematic block diagram of a power distribution box according to a first embodiment of the present invention;

fig. 4 is a schematic block diagram of a multi-loop control terminal according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a distribution box according to a second embodiment of the present invention;

fig. 6 is a schematic structural view of a distribution box according to a third embodiment of the present invention;

fig. 7 is a schematic structural view of a distribution box provided in the fourth embodiment of the present invention

Fig. 8 is a schematic structural view of a distribution box according to a fifth embodiment of the present invention;

fig. 9 is a schematic structural view of a distribution box according to a sixth embodiment of the present invention.

In the figure:

1. a box body; 2. mounting a plate; 3. a multi-loop control terminal; 301. a protection control unit; 302. a CPU unit; 303. a communication unit; 304. a switching value input/output unit; 305. a voltage and current signal acquisition unit; 306. a power supply unit; 307. a contactor control unit; 4. an expansion module; 5. an incoming line terminal; 6. an incoming line breaker; 7. an incoming line loop current transformer; 8. a main branch circuit breaker; 9. a backup branch circuit breaker; 10. a main branch current transformer; 11. preparing a branch current transformer; 12. a main branch contact; 13. preparing a branch contactor; 14. a power supply module; 15. a display terminal; 16. operating the display device; 17. zero ground row; 18. the main loop is connected with a cable; 19. the main branch is connected with a cable; 20. the spare branch is connected with a cable; 21. a fuse; 22. an intermediate relay; 23. a wiring terminal; 24. a box door; 25. a door lock; 26. a wire slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. In the embodiments, the positions of the described objects in the drawings, such as "upper", "lower", "left", "right", etc., are used merely to indicate relative positional relationships, and when the absolute positions of the described objects in the embodiments are changed, the relative positional relationships may also be changed accordingly.

The following describes in detail an electric distribution box according to an embodiment of the present invention with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural diagram of a distribution box according to a first embodiment of the present invention, and fig. 2 is a schematic structural diagram of a door of the distribution box according to a first embodiment of the present invention; the distribution box that this embodiment provided includes box 1 and chamber door 24, box 1 with chamber door 24 articulates, is provided with lock 25 on the chamber door 24, provides the protection to the equipment in the box 1.

In the distribution box provided by the first embodiment of the present invention, the box body 1 includes a multi-loop control terminal 3, a main branch circuit breaker 8, a standby branch circuit breaker 9, a main branch current transformer 10, a standby branch current transformer 11, a main branch contactor 12, a standby branch contactor 13, and a power module 14; the incoming line of the box body 1 is divided into at least two branches, namely a main branch and a standby branch, and the reliability of the distribution box is improved by adopting a design mode of 'one main branch and one standby branch', and fig. 3 shows a schematic diagram of a schematic block diagram of the distribution box provided by the first embodiment of the invention.

The main branch incoming line is connected to the main branch circuit breaker 8 through a main branch connecting cable 19 and passes through the main branch current transformer 10 to be connected to the main branch contactor 12, and the standby branch incoming line is connected to the standby branch circuit breaker 9 through a standby branch connecting cable 20 and passes through the standby branch current transformer 11 to be connected to the standby branch contactor 13; the signals collected by the main branch current transformer 10 and the standby branch current transformer 11 are respectively connected to the multi-loop control terminal 3, and the two paths of current signals are collected and logically judged by the multi-loop control terminal 3 to judge whether the power supply of the distribution box has an abnormal phenomenon; shunt tripping and auxiliary contacts of the main branch circuit breaker 8 and the standby branch circuit breaker 9 are connected to the multi-loop control terminal 3, and the states of the two branch circuit breakers are judged and controlled; normally open contacts of the main branch contactor 12 and the standby branch contactor 13 are connected to the multi-loop control terminal 3, and the multi-loop control terminal 3 monitors, controls, protects and logically controls the two branches; the power module 14 is electrically connected to the multi-loop control terminal 3 and provides DC24V power to the multi-loop control terminal 3.

In the distribution box provided by the first embodiment of the invention, the box body 1 further comprises an incoming line terminal 5, an incoming line breaker 6, an incoming line current transformer 7 and a fuse 21; the incoming line of the box body 1 is connected with the incoming line breaker 6 through a main loop connecting cable 18 and passes through the incoming line current transformer 7 to be divided into at least two branches which are respectively connected with the main branch breaker 8 and the standby branch breaker 9; the incoming line current transformer 7 collects signals and is connected to the incoming line terminal 5, and the current signals of the main loop are detected; the three-phase electric signals at the outgoing line side of the incoming line breaker 6 are connected with the fuse 21 through cables and then are connected to the incoming line terminal 5 and the multi-loop control terminal 3, the incoming line terminal 5 monitors and controls the state of the main loop breaker 6, the fuse 21 provides a power supply abnormity protection function for the distribution box, and shunt tripping and auxiliary contacts of the incoming line breaker 6 are connected to the incoming line terminal 5; the incoming line terminal 5 monitors, controls and protects the incoming line loop, thereby realizing the logic control of the distribution box and improving the intelligent level of the distribution box.

The distribution box provided by the first embodiment of the invention optionally further comprises a display terminal 15 and an expansion module 4; the incoming line of the power module 14 is connected with the outgoing line end of the incoming line breaker 6, and the outgoing line of the power module 14 is respectively connected with the incoming line terminal 5, the multi-loop control terminal 3 and the display terminal 15 and provides 24V power supply for the equipment; the display terminal 15 is further in communication connection with the incoming line terminal 5 and the multi-loop control terminal 3 respectively and is used for displaying power utilization information of the distribution box and setting human-computer interaction parameters, and preferably, 485 communication is adopted as a communication mode.

The expansion module 4 is in communication connection with the multi-loop control terminal 3 for expanding input and output quantity, and preferably, the communication mode is CAN bus communication; the multi-loop control terminal 3 is used for switching the expansion module and providing a 24V power supply module; the expansion module 4 transmits external input information to the multi-loop control terminal 3 through a CAN bus, and the multi-loop control terminal 3 transmits information output to the outside to the expansion module 4 through the CAN bus; when the number of the external input/output interfaces exceeds the number of the input/output interfaces configured for the multi-loop control terminal 3, the expansion module 4 is added to accept the input/output quantity which can not be accessed to the multi-loop control terminal 3, and meanwhile, the expansion module 4 also has the input/output of the analog quantity.

Optionally, the distribution box may also be configured with terminals 23 for branching and switching when the input/output is high.

Optionally, the display terminal 15 is externally connected with at least one of a processor, a monitoring host and an upper computer, and can realize local and remote protection, control, monitoring and management functions on all loops.

Optionally, the screen of the display terminal 15 is one of a touch screen, a liquid crystal screen, an LED screen, and an OLED screen.

In the distribution box provided by the first embodiment of the present invention, optionally, the box door 24 further includes an operation display device 16, and the operation display device 16 includes a main branch manual start-stop component and a standby branch manual start-stop component, and corresponds to a button, an indicator light, a knob, and the like on the distribution box. The incoming line circuit breaker 6 is connected with the main branch contactor 12 through the main branch manual starting and stopping part, and the incoming line circuit breaker 6 is connected with the standby branch contactor 13 through the standby branch manual starting and stopping part, so that manual starting and stopping control over the main branch contactor 12 and the standby branch contactor 13 is achieved. For the distribution box, a standby operation mode is added through the arrangement of the operation display device 16, the safety of the distribution box is improved, and if the inside of the distribution box breaks down or is debugged, even if the distribution box breaks down, the distribution box can be manually selected to operate or stop emergently.

In the distribution box provided in the first embodiment of the present invention, optionally, the box body 1 further includes an intermediate relay 22, where the intermediate relay 22 receives an external control signal and is connected to the main branch contactor 12 and the standby branch contactor 13 to realize on-off control of the main branch contactor 12 and the standby branch contactor 13, so as to respond to the external signal and perform corresponding control, where the main branch contactor 12 and the standby branch contactor 13 are connected to a load device.

In the distribution box provided in the first embodiment of the present invention, fig. 4 is a schematic diagram illustrating a schematic block diagram of a multi-loop control terminal provided in the first embodiment of the present invention; the multi-loop control terminal 3 comprises a protection control unit 301, a CPU unit 302, a communication unit 303, a switching value input/output unit 304, a voltage and current signal acquisition unit 305, a power supply unit 306, and a contactor control unit 307.

The CPU unit 302 is electrically connected to the protection control unit 301, the communication unit 303, the switching value input/output unit 304, the voltage/current signal acquisition unit 305, the power supply unit 306, and the contactor control unit 307, respectively, and is used for inputting and outputting various electrical signals and performing logic calculation and judgment; the protection control unit 301 is configured to collect circuit breaker auxiliary contact signals of the main branch and the standby branch and output a control signal; the communication unit 303 at least comprises a 485 communication circuit and a CAN communication circuit, and realizes data communication between related unit modules; the contactor control unit 307 is configured to collect contactor auxiliary contact signals of the main branch and the standby branch and output a control signal; the voltage and current signal acquisition unit 305 is configured to acquire voltage and current signals of the main branch and the standby branch, process the voltage and current signals, output the voltage and current signals to the CPU unit 302, determine whether power supply is abnormal, convert the input voltage signal into a mV-level voltage signal through the voltage transformer HPT225A-G, perform filtering and amplification processing, and convert the input current signal into a mV-level voltage signal through the current transformer HCT226HJZ, and perform filtering and amplification processing.

Optionally, the CPU chip used by the CPU unit 302 may be an STM32F407 chip, or an MC68HC908AP32 chip or a TMS320C32 series chip.

The power supply unit 306 is electrically connected to the protection control unit 301, the CPU unit 302, the communication unit 303, the switching value input/output unit 304, the voltage/current signal acquisition unit 305, and the contactor control unit 307, respectively, by switching or converting the 24V dc voltage input by the power module 14 to 5V and 3.3V, directly or by voltage conversion.

In the distribution box provided by the first embodiment of the present invention, the multi-loop control terminal 3 is provided with at least one of a 485 communication interface, a CAN communication interface, a power module interface, a voltage signal interface, a switching value input/output interface, a current signal interface, a circuit breaker interface, and a contactor interface.

Furthermore, the box body 1 is also provided with an installation plate 2, the installation plate 2 is fixed on the back of the box body 1, and the installation plate 2 is used for installing and fixing various components in the box body 1; one side of mounting panel 2 still is provided with at least one of wire casing 26 for holding walking of block terminal, it is regular to make the inside line of walking of box, avoids walking the line in disorder and is unfavorable for the maintenance, leads to the electric shock accident even.

Optionally, a zero ground row 17 is further disposed in the box body 1, so that branching and switching of the zero line and the ground line are facilitated.

Example two

Fig. 5 shows a schematic structural diagram of a distribution box according to a second embodiment of the present invention, where the same parts as those in the first embodiment are denoted by the same reference numerals, and only differences are described below, where when the number of external input/output interfaces does not exceed the number of input/output interfaces configured in the multi-loop control terminal 3, the distribution box according to the second embodiment of the present invention may not use the expansion module 4, and accordingly, the number of connections related to the expansion module 4 is reduced, thereby reducing the production cost.

EXAMPLE III

Fig. 6 shows a schematic structural diagram of a distribution box according to a third embodiment of the present invention, where the same parts as those in the first embodiment are denoted by the same reference numerals, and only differences are described below, where when a user does not have a requirement for a local and remote monitoring and control function, the distribution box according to the third embodiment of the present invention may not use the display terminal 15, and accordingly, connections related to the display terminal 15 are reduced, thereby reducing production costs.

Example four

Fig. 7 is a schematic structural diagram of a distribution box according to a fourth embodiment of the present invention, where the same parts as those in the first embodiment are denoted by the same reference numerals, and only differences are described below, where when a user does not have local and remote monitoring and control function requirements and the number of external input/output interfaces does not exceed the number of input/output interfaces configured in the multi-loop control terminal 3, the distribution box according to the fourth embodiment of the present invention may not use the display terminal 15 and the expansion module 4, and accordingly reduces connections related to the display terminal 15 and the expansion module 4, thereby reducing production costs.

EXAMPLE five

Fig. 8 shows a schematic structural diagram of a distribution box according to a fifth embodiment of the present invention, where the same parts as those in the first embodiment use the same reference numerals, and only differences are described below, where when a user has no requirement for intelligent monitoring of incoming loop current signals, the distribution box according to the fifth embodiment of the present invention may not use the incoming terminal 5 and the incoming current transformer 7, and accordingly reduces connections related to the incoming terminal 5 and the incoming current transformer 7, thereby reducing production costs.

EXAMPLE six

Fig. 9 is a schematic structural diagram of a distribution box according to a sixth embodiment of the present invention, where the same reference numerals are used for the same parts as those in the first embodiment, and only differences are described below, and the distribution box according to the sixth embodiment of the present invention may not use the operation display device 16 when a user has no manual control requirement on the distribution box, and accordingly, the connections related to the operation display device 16 are reduced, thereby reducing the production cost.

EXAMPLE seven

The seventh embodiment of the present invention provides a distribution box, the same parts as those in the first embodiment are provided with the same reference numerals, and only the differences are described below, a main branch can be further added in the box body 1, a design manner of "two main branches and one standby" is adopted, a circuit breaker, a current transformer and a contactor of a second main branch need to be added in the corresponding box body, and the circuit breaker, the current transformer and the contactor of the corresponding second main branch are all correspondingly connected with the multi-loop control terminal 3.

Example eight

The eighth embodiment of the invention provides a distribution box, the same parts as those in the first embodiment are provided with the same reference numerals, and only the differences are described below, a main branch and a standby branch can be further added in the box body 1, a design mode of 'two main branches and two standby branches' is adopted, a circuit breaker, a current transformer and a contactor of a second main branch and a second standby branch need to be added in the corresponding box body, and the circuit breaker, the current transformer and the contactor of the corresponding second main branch and the second standby branch are correspondingly connected with the multi-loop control terminal 3.

The distribution box provided by the embodiment of the invention can realize local and remote protection, control, monitoring and management of each component of the distribution box, can carry out intelligent control and fault alarm on a distribution system, adopts a design mode of a main branch and a standby branch, greatly improves the reliability of the distribution box, increases manual operation units, improves the safety of the distribution box, has high modularization degree of each part structure of the distribution box, good safety, high reliability, high integration degree and intelligent degree, is convenient to assemble, maintain and monitor and control, has better controllability and expandability, and can meet the increasingly high distribution requirements of users.

The following points need to be explained:

(1) in the embodiments of the present invention and the drawings, the same reference numerals refer to the same meanings unless otherwise defined.

(2) The drawings of the embodiments of the invention only relate to the structures related to the embodiments of the invention, and other structures can refer to common designs.

(3) In the drawings, which are used to describe embodiments of the invention for purposes of clarity, certain features may be exaggerated or minimized in size, i.e., the drawings are not drawn to scale.

(4) Without conflict, embodiments of the present invention and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A distribution box comprises a box body (1) and a box door (24), wherein the box body (1) is hinged with the box door (24); the box body (1) is characterized by comprising a multi-loop control terminal (3), a main branch circuit breaker (8), a standby branch circuit breaker (9), a main branch current transformer (10), a standby branch current transformer (11), a main branch contactor (12), a standby branch contactor (13) and a power module (14); the incoming line of the box body (1) is divided into at least two branch circuits including a main branch circuit and a standby branch circuit, the main branch circuit incoming line is connected to the main branch circuit breaker (8) and penetrates through the main branch circuit current transformer (10) to be connected to the main branch contactor (12), and the standby branch circuit incoming line is connected to the standby branch circuit breaker (9) and penetrates through the standby branch circuit current transformer (11) to be connected to the standby branch circuit contactor (13); signals collected by the main branch current transformer (10) and the standby branch current transformer (11) are respectively connected to the multi-loop control terminal (3); the main branch circuit breaker (8) and the standby branch circuit breaker (9) are respectively connected to the multi-loop control terminal (3); auxiliary contacts of the main branch contactor (12) and the standby branch contactor (13) are connected to the multi-loop control terminal (3), and the multi-loop control terminal (3) monitors, protects and logically controls the two branches; the power supply module (14) is electrically connected with the multi-loop control terminal (3) and supplies power to the multi-loop control terminal (3).

2. A distribution box according to claim 1, characterized in that said box body (1) further comprises an incoming terminal (5), an incoming circuit breaker (6), an incoming current transformer (7); an incoming line of the box body (1) is connected with the incoming line breaker (6) and penetrates through the incoming line current transformer (7) to be divided into at least two branches which are respectively connected with the main branch breaker (8) and the standby branch breaker (9); the incoming line current transformer (7) collects signals and is connected to the incoming line terminal (5); the three-phase electric signals at the outgoing line side of the incoming line breaker (6) are connected to the incoming line terminal (5) and the multi-loop control terminal (3) through cables; and the incoming line terminal (5) monitors, controls and protects the incoming line loop.

3. An electric box according to claim 1 or 2, characterized in that it further comprises a display terminal (15), an expansion module (4); the incoming line of the power supply module (14) is connected with the outgoing line end of the incoming line breaker (6), and the outgoing line of the power supply module (14) is respectively connected with the incoming line terminal (5), the multi-loop control terminal (3) and the display terminal (15) and provides power for the equipment; the display terminal (15) is also respectively connected with the incoming line terminal (5) and the multi-loop control terminal (3) and used for displaying power utilization information of the distribution box and setting man-machine interaction parameters; the expansion module (4) is in communication connection with the multi-loop control terminal (3) and is used for expanding input and output quantity.

4. The distribution box according to claim 1 or 2, characterized in that said box door (24) further comprises an operation display device (16), said operation display device (16) comprises a main branch manual start-stop component and a standby branch manual start-stop component; the incoming line circuit breaker (6) is connected with the main branch contactor (12) through the main branch manual starting and stopping component, the incoming line circuit breaker (6) is connected with the standby branch contactor (13) through the standby branch manual starting and stopping component, and therefore manual on-off control of the main branch contactor (12) and the standby branch contactor (13) is achieved.

5. A distribution box according to claim 1 or 2, characterized in that said incoming circuit breaker (6) is provided with shunt release and/or auxiliary contacts, said shunt release and/or auxiliary contacts of said incoming circuit breaker (6) being connected to said incoming terminal (5); the main branch circuit breaker (8) and the spare branch circuit breaker (9) are respectively provided with shunt tripping and/or auxiliary contacts, and the shunt tripping and/or the auxiliary contacts of the main branch circuit breaker (8) and the spare branch circuit breaker (9) are connected to the multi-loop control terminal (3).

6. A distribution box according to claim 4, characterized in that, the box (1) further comprises a fuse (21), the fuse (21) is connected in series between the incoming line breaker (6) and the incoming line terminal (5), between the incoming line breaker (6) and the multi-loop control terminal (3), between the incoming line breaker (6) and the power module (14), at least one of the circuits between the incoming line breaker (6) and the operation display device (16) realizes the overcurrent protection function.

7. The distribution box according to claim 3, wherein the display terminal (15) is externally connected with at least one of a processor, a monitoring host computer and an upper computer.

8. The distribution box according to claim 3, wherein the screen of the display terminal (15) is one of a touch screen, a liquid crystal screen, an LED screen and an OLED screen.

9. An electric distribution box according to any of claims 1-8, said box body (1) further comprising an intermediate relay (22), said intermediate relay (22) receiving external control signals and electrically connecting with at least one of said main branch breaker (8), said standby branch breaker (9), said main branch contactor (12) and said standby branch contactor (13) for on-off control thereof; the intermediate relay (22) is connected with the multi-loop control terminal (3), and the multi-loop control terminal (3) collects the state signal of the intermediate relay (22).

10. The distribution box according to any of claims 1-8, characterized in that said multi-loop control terminal (3) comprises a protection control unit (301), a CPU unit (302), a communication unit (303), a switching value input and output unit (304), a voltage and current signal acquisition unit (305), a power supply unit (306), a contactor control unit (307); the CPU unit (302) is respectively and electrically connected with the protection control unit (301), the communication unit (303), the switching value input and output unit (304), the voltage and current signal acquisition unit (305), the power supply unit (306) and the contactor control unit (307) for inputting and outputting various electric signals and performing logic calculation and judgment; the power supply unit (306) is electrically connected with the protection control unit (301), the CPU unit (302), the communication unit (303), the switching value input and output unit (304), the voltage and current signal acquisition unit (305) and the contactor control unit (307) directly or through voltage conversion respectively for power supply of the units.

11. The electrical distribution box according to claim 10, wherein said multi-loop control terminal (3) is provided with at least one of a 485 communication interface, a CAN communication interface, a power module interface, a voltage signal interface, a switching value input/output interface, a current signal interface, a circuit breaker interface, and a contactor interface.