Low-voltage intelligent measurement and control device

Abstract

The utility model belongs to the technical field of low-voltage measurement and control, and discloses a low-voltage intelligent measurement and control device, which comprises a shell and a measurement and control circuit arranged in the shell, the shell comprises a first panel and a second panel, and the first panel is provided with a wire inlet cabinet and / or a compensation cabinet and an interaction module; the second panel is provided with a plurality of connection ports used for being in electric connection and / or communication connection with an external unit. The measurement and control circuit is electrically connected with the wire inlet cabinet, the compensation cabinet, the interaction module and the connection port, and is used for measuring and displaying the electric signal. The utility model provides the intelligent low-voltage measurement and control device which is simple in structure, convenient to install and complete in function, the system architecture is more simple and compact, and the problems of equipment redundancy and low space utilization rate are effectively solved; according to the modular design, the installation and wiring process is greatly simplified, the debugging efficiency is remarkably improved, and the low-voltage wire inlet cabinet and the compensation cabinet are simpler in structure, easier to produce and install and more convenient to operate and maintain in the later period.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low pressure measurement and control technical field, specifically, relate to a low pressure intelligent measurement and control device. BACKGROUND

[0002] In the existing low voltage distribution system, there are many technical problems in the measurement and control device of incoming line cabinet and compensation cabinet. The incoming line cabinet is usually configured with independent ammeter, voltmeter, voltage conversion switch and multiple sampling transformers; the compensation cabinet is provided with multiple instruments, voltage conversion switch and independent compensation controller. This traditional configuration scheme has the following technical defects: first, the system architecture is too complex, and the separate setting of each functional module leads to equipment redundancy; second, the wiring relationship between multiple devices is complicated, which increases the installation and debugging difficulty; third, the separate design causes low resource utilization and increases operation and maintenance cost; finally, when troubleshooting and system maintenance, each independent module needs to be detected one by one, which reduces the maintainability. These technical problems restrict the intelligent development of low voltage distribution system, and it is urgent to optimize the system structure and improve the overall performance through technical innovation. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model provides a low pressure intelligent measurement and control device to solve the above problems.

[0004] To solve the above technical problems, the utility model provides a low pressure intelligent measurement and control device, which comprises:

[0005] The shell and the measurement and control circuit arranged in the shell;

[0006] The shell comprises a first panel and a second panel, the first panel is provided with an incoming line cabinet and / or a compensation cabinet and an interactive module; the second panel is provided with a plurality of connection ports for electrical connection and / or communication connection with external units;

[0007] The measurement and control circuit is electrically connected with the incoming line cabinet and / or the compensation cabinet, the interactive module and the connection port respectively, and is used for measuring and displaying electrical signals.

[0008] As an optional way, the second panel is designed as hollow, used for forming a containing cavity containing the measurement and control circuit; the first panel is fixed on the opening of the second panel in a covering manner.

[0009] As an optional way, the second panel is provided with fixing buckles on both sides of the face where the connection ports are arranged, used for fixing to the cabinet body.

[0010] As an optional way, the incoming line cabinet comprises a three-phase voltage and current display area, voltage and current indicator lights; the compensation cabinet comprises a three-phase power factor and current display area, power factor and current indicator lights.

[0011] As an alternative, the interaction module comprises a display area and an operation area, the display area comprises at least one interaction indication device, and the operation area comprises at least one operation device.

[0012] As an alternative, the interaction indication device comprises a switching state indication lamp, a communication indication lamp, a fault indication lamp and a fan indication lamp; and the operation device comprises a plurality of preset logic operation buttons.

[0013] As an alternative, the first panel further comprises a liquid crystal display device.

[0014] As an alternative, the measurement and control circuit is further connected with a voltage transformer and a current transformer.

[0015] As an alternative, the measurement and control circuit is further connected with a temperature and humidity sensor, which is electrically connected with the heat dissipation device through a relay.

[0016] As an alternative, the second panel is further provided with a communication interface for collecting and controlling the running state of the circuit and / or communicating with an external unit.

[0017] The beneficial effects of the present application are as follows:

[0018] The present application provides an intelligent low-voltage measurement and control device with simple structure, convenient installation and complete functions, and the system architecture is more simple and compact, effectively solving the problems of equipment redundancy and low space utilization; the modular design greatly simplifies the installation wiring process, significantly improves the debugging efficiency, and makes the structure of the low-voltage incoming line cabinet and the compensation cabinet more simple, the production and installation easier, and the later operation and maintenance more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A shell structure schematic diagram from a perspective is provided for the embodiments of the present application;

[0020] Figure 2 Another shell structure schematic diagram from a perspective is provided for the embodiments of the present application;

[0021] Figure 3 A front view of the shell is provided for the embodiments of the present application;

[0022] Figure 4 A rear view of the shell is provided for the embodiments of the present application;

[0023] Figure 5 A measurement and control circuit structure schematic diagram is provided for the embodiments of the present application.

[0024] Corresponding relationship of reference signs:

[0025] 1 - first panel, 2 - second panel, 3 - fixed buckle, 41 - incoming line cabinet, 42 - compensation cabinet, 43 - operation button, 44 - interactive indication device, 45 - liquid crystal display device, 51 - three-phase voltage connection port, 52 - current sampling port, 53 - fan output contact, 54 - USB interface, 55 - communication interface, 56 - temperature sampling port, 57 - reserved port. DETAILED DESCRIPTION

[0026] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with specific embodiments.

[0027] The embodiment provides a low-voltage intelligent measurement and control device, which comprises a shell and a measurement and control circuit arranged in the shell; the shell comprises a first panel 1 and a second panel 2, the first panel 1 is provided with an incoming line cabinet 41 and / or a compensation cabinet 42 and an interactive module; the second panel 2 is provided with a plurality of connection ports for electrically connecting and / or communicatively connecting with external units; the measurement and control circuit is electrically connected with the incoming line cabinet 41 and / or the compensation cabinet 42, the interactive module and the connection ports respectively, and is used for measuring and displaying electric signals.

[0028] Please refer to Figures 1-4 , in the embodiment, the second panel 2 is designed to be hollow, for forming an accommodating cavity for accommodating the measurement and control circuit; the first panel 1 is fixed on the opening of the second panel 2 in a covering mode. The second panel 2 is provided with a fixed buckle 3 on the two sides of the face on which the connection ports are arranged, for being fixed to the cabinet body, as shown in Figure 1 and as shown in 2.

[0029] Please refer to Figure 3 , the incoming line cabinet 41 on the first panel 1 of the embodiment comprises a three-phase voltage and current display area and voltage and current indicator lamps; the compensation cabinet 42 comprises a three-phase power factor and current display area and power factor and current indicator lamps. The interactive module comprises a display area and an operation area, the display area comprises at least one interactive indication device 44, and the operation area comprises at least one operation device. The interactive indication device 44 can be any audible and visual prompting device, so as to facilitate an operator to understand the current running state of the device. The interactive indication device 44 provided by the embodiment comprises a switching state indicator lamp, a communication indicator lamp, a fault indicator lamp and a fan indicator lamp; the operation device comprises a plurality of operation buttons 43 with preset logic. The operation buttons 43 can be arranged and arranged in any layout, or can be arranged in an array.

[0030] In an alternative embodiment, the display panel can be provided with no less than three power distribution voltage / current displays and two display content indicators, no less than three power factor / compensation cabinet 42 current displays and two display content indicators, no less than 12 capacitor switching state indicator lights, one communication state indicator light, one device state indicator light, one fan state indicator light, no less than four keys and one liquid crystal screen for human-computer interaction. In addition, the first panel 1 further comprises a liquid crystal display device 45, which can be an LCD display screen, an OLED display screen, etc., and cooperates with a supporting terminal platform or network to perform visual display. The measurement and control circuit is further connected with a temperature and humidity sensor, which is electrically connected with the heat dissipation device through a relay.

[0031] Please refer to Figure 4 , as an alternative, the connection port provided by the embodiment includes a three-phase voltage connection port 51, a current sampling port 52, a fan output contact 53, a USB interface 54, a temperature sampling port 56, and a plurality of reserved ports 57. The measurement and control circuit is further provided with a communication interface 55 such as an RS485 network interface for collecting and controlling the running state of the circuit and / or communicating with external units.

[0032] Please refer to Figure 5 , Figure 5 The measurement and control circuit structure diagram provided by the embodiment is shown in the figure, ⑦ is the measurement and control circuit core part with microprocessor as the core; ①②③ are voltage transformers and auxiliary circuits, which convert the distribution voltage into the signal input allowed by the measurement and control circuit ⑦; realize the isolation of strong and weak electricity. ④⑤⑥ are current transformers and auxiliary circuits, which convert the secondary side current signal (0-5A) of the power grid into the signal input allowed by the measurement and control circuit ⑦; realize the isolation of strong and weak electricity. The temperature sampling module input signal is used to collect the temperature to be measured; ⑧ is the key for human-computer interaction input; ⑨ is the liquid crystal display for human-computer interaction display; ⑩ is the display, for displaying the three-phase distribution voltage or current of the cabinet; for identifying the display content; is the display, for displaying the three-phase compensation current of the compensation cabinet 42 or the system power factor; for identifying the display content; is the indicator light for indicating the capacitor switching running state and the cooling fan running state; is the relay output for controlling the start and stop of the cooling fan; RS485 interface, for controlling the compensation cabinet 42 capacitor switching and collecting capacitor state and running current data, or communicating with external devices online;

[0033] The working principle of the circuit is:

[0034] The incoming line cabinet 41 power distribution voltage measurement and display - ⑦ through ① ② ③ A / D conversion, operational amplifier, conversion, etc. Processing measured three-phase power distribution voltage, and then sent to ⑩ Display;

[0035] The incoming line cabinet 41 power distribution voltage measurement and display - ⑦ through ④ ⑤ ⑥ A / D conversion, operational amplifier, conversion, etc. Processing measured three-phase power distribution system current, and then sent to ⑩ Display;

[0036] Compensation cabinet 42 power factor measurement and display - ⑦ through ① ② ③ and ④ ⑤ ⑥ and A / D conversion, operational amplifier, conversion, etc. Processing measured three-phase power distribution power factor, and then sent to Display;

[0037] Compensation cabinet 42 compensation current measurement and display - ⑦ by collecting the operating current of the capacitor and calculating the compensation current of the compensation cabinet 42, and then sent to Display;

[0038] Control of the cooling fan - ⑦ by Or collect temperature values, through operation to achieve the set operating conditions, the control signal is sent to the relay output.

[0039] Capacitor automatic compensation control - ⑦ through ① ② ③ and ④ ⑤ ⑥ and A / D conversion, operational amplifier, conversion, etc. Processing measured three-phase power factor and reactive power value and current voltage phase, if the current phase lags behind the voltage phase, then by using the communication mode to put in the capacitor; If the current phase is ahead of the voltage phase, then by using the communication mode to remove the capacitor;

[0040] Capacitor status indication - ⑦ by collecting the capacitor state, making The corresponding capacitor indicator in ⑨ bright or extinguish;

[0041] Cooling fan status indication - ⑦ by Output control signal, making The corresponding fan indicator in ⑨ bright or extinguish;

[0042] Human-computer interaction - through ⑧ ⑦ sensing, ⑦ make corresponding action; ⑦ through ⑨ show the action results;

[0043] Online - through the online with the external device with response communication interface and communication protocol, collaborative work.

[0044] Through the scheme described in the embodiment, the system architecture is more concise and compact, effectively solving the problems of device redundancy and low space utilization; the modular design greatly simplifies the installation wiring process, significantly improves the debugging efficiency, and makes the structure of the low-voltage incoming line cabinet 41 and the compensation cabinet 42 more concise, the production and installation easier, and the later operation and maintenance more convenient.

[0045] The above are only preferred embodiments of the present application, and it should be pointed out that the above preferred embodiments should not be regarded as limiting the present application, and the protection scope of the present application should be limited by the scope defined by the claims. For ordinary skilled in the art, some improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A low-voltage intelligent measurement and control device, characterized in that, The utility model relates to a kind of electric energy metering device, including: Housing and control circuit arranged in the housing; The housing includes first panel (1) and second panel (2), the first panel (1) is provided with incoming line cabinet (41) and / or compensation cabinet (42) and interactive module;The second panel (2) is provided with a plurality of connection ports for electrical connection and / or communication connection with external units; The control circuit is electrically connected with the incoming line cabinet (41) and / or compensation cabinet (42), interactive module and connection port respectively, for measuring and displaying electrical signal.

2. The low-voltage intelligent measurement and control device according to claim 1, characterized in that The second panel (2) is designed as hollow, for forming accommodating cavity accommodating the control circuit;The first panel (1) is fixed on the opening of the second panel (2) in covering mode.

3. The low-voltage intelligent measurement and control device according to claim 1, characterized in that The second panel (2) is provided with fixing buckle (3) on both sides of the face perpendicular to the face where the connection port is arranged, for fixing the device to cabinet.

4. The low-voltage intelligent measurement and control device according to claim 1, characterized in that, The incoming line cabinet (41) includes three-phase voltage and current display area, voltage and current indicator light;The compensation cabinet (42) includes three-phase power factor and current display area, power factor and current indicator light.

5. The low-voltage intelligent measurement and control device according to claim 1, characterized in that, The interactive module includes display area and operation area, the display area includes at least one interactive indicating device (44), and the operation area includes at least one operating device.

6. The low-voltage intelligent measurement and control device according to claim 5, characterized in that The interactive indicating device (44) includes switching state indicator light, communication indicator light, fault indicator light and fan indicator light;The operating device includes a plurality of preset logic operation keys (43).

7. The low-voltage intelligent measurement and control device according to claim 1, characterized in that, The first panel (1) further includes liquid crystal display device (45).

8. The low-voltage intelligent measurement and control device of claim 1, wherein, The control circuit is further connected with voltage transformer and current transformer.

9. The low-voltage intelligent measurement and control device of claim 2, wherein, The control circuit is further connected with temperature and humidity sensor, which is electrically connected with heat dissipation device through relay.

10. The low-voltage intelligent measurement and control device of claim 1, wherein, The second panel (2) is further provided with communication interface, for collecting and controlling circuit operating state and / or communicating with external units.

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