CN220933067U - A multi-channel current and leakage current monitoring device - Google Patents

Abstract

The utility model relates to a multi-channel current and leakage current monitoring device, which includes a shell and a circuit board arranged in the shell, the shell is composed of an upper shell component and a lower shell component, and a plurality of external current and leakage current sockets are welded on the circuit board; the top surface of the upper shell component is provided with a multi-channel current input terminal and a multi-channel leakage current input terminal, and a communication output port and an auxiliary power input terminal are also provided; an MCU chip is provided on the circuit board, and the MCU chip is respectively connected to a communication unit, a power supply unit, an LED control unit and an optical coupling isolation unit, and the optical coupling isolation unit is connected to an AC metering chip, and the AC metering chip is respectively connected to an AC current acquisition unit and an AC leakage current acquisition unit. The utility model adopts a multi-channel design, can monitor the current and leakage current of multiple channels at the same time, and is suitable for multi-channel monitoring needs.

Description

A multi-channel current and leakage current monitoring device

Technical Field

The utility model relates to the technical field of current and leakage current monitoring, and in particular to a multi-channel current and leakage current monitoring device, which can be applied to the fields of power monitoring, metering and monitoring, industrial control, vehicle and ship monitoring, etc.

Background technique

Current and leakage current monitoring devices can be used in many fields, such as:

Power system: In the power system, current needs to be monitored to ensure the normal operation of the power grid; at the same time, leakage current monitoring can be used to detect leakage in the power grid, so as to promptly discover and eliminate safety hazards.

Industrial control: In the field of industrial control, the currents of multiple devices and machines need to be monitored simultaneously to ensure the normal operation of the devices and machines. At the same time, leakage current monitoring can be used to detect leakage in these devices and machines, so as to promptly discover and eliminate safety hazards.

Automotive electronics: In automotive electronics, the current in the vehicle circuit needs to be monitored to ensure the normal operation of the vehicle circuit; at the same time, leakage current monitoring can be used to detect leakage in the vehicle circuit, so as to promptly discover and eliminate safety hazards.

At present, the current and leakage current monitoring devices on the market mainly adopt a single-channel design, that is, each device can only monitor the current or leakage current of one channel. This design has problems such as narrow monitoring range and high cost, and is not suitable for multi-channel monitoring needs. For example, Chinese patent CN202223430368.0 provides a multi-channel current monitoring device, which is large in size and not conducive to installation in application scenarios such as distribution boxes and distribution cabinets. It is inconvenient to transport and wire, and the degree of integration is not high.

Summary of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a multi-channel current and leakage current monitoring device, which adopts a multi-channel design and can realize simultaneous monitoring of currents or leakage currents of multiple channels.

The purpose of the utility model is achieved in this way:

A multi-channel current and leakage current monitoring device comprises a shell and a circuit board arranged in the shell, wherein the shell consists of an upper shell component and a lower shell component, the upper shell component and the lower shell component are connected by a snap, and a plurality of external current and leakage current sockets are welded on the circuit board; a multi-channel current input terminal and a multi-channel leakage current input terminal are arranged on the top surface of the upper shell component, and a communication output port and an auxiliary power supply input terminal are also arranged, and the bottoms of the current input terminal, the leakage current input terminal, the communication output port and the auxiliary power supply input terminal are all welded on the circuit board; an MCU chip is arranged on the circuit board, and the MCU chip is respectively connected to a communication unit, a power supply unit, an LED control unit and an optical coupling isolation unit, and the optical coupling isolation unit is connected to an AC metering chip, and the AC metering chip is respectively connected to an AC current acquisition unit and an AC leakage current acquisition unit.

Furthermore, fixing parts are respectively inserted at both ends of the bottom surface of the lower shell assembly, and the fixing parts are used for wall-mounted fixed installation.

Furthermore, guide rail locking pieces are respectively provided at both ends of the bottom surface of the lower shell assembly, and the guide rail locking pieces are plugged into the bottom surface of the lower shell assembly for guide rail installation.

Furthermore, the current input terminal is externally connected to a precision current transformer, and the transformer output terminal is divided into two wires, S1 and S2, which are respectively connected to the "+" and "-" of the current input segment to input a mA-level current signal, and the actual current data of the device can be monitored through this current signal; the leakage current input terminal is externally connected to the leakage current, and is respectively connected to the "+" and "-" of the leakage current input segment to input a mA-level leakage current signal, and the actual leakage current data of the device can be monitored through this leakage current signal; the communication output port uploads the above-mentioned current and floor current data to the upper computer software, and supports settings through the communication port; the auxiliary power input is used to power the device, and supports DC 24V voltage power supply.

Furthermore, two LCD indicator lights are provided on the top surface of the upper shell assembly.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model provides a multi-channel current and leakage current monitoring device, multi-channel design: adopting the multi-channel design, the current and leakage current of multiple channels can be monitored simultaneously, and it is suitable for multi-channel monitoring needs; independent monitoring: the monitoring module of each channel can independently monitor the current or leakage current, avoiding mutual interference between different channels; data processing: the integrated data processing unit can process and analyze the monitoring data of each channel, and output the monitoring data, thereby improving the monitoring efficiency and accuracy; low cost: compared with a single-channel monitoring device, the cost of the device is lower and it is suitable for large-scale applications; high stability: the utility model has high stability and reliability, and can work stably for a long time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a top view of the utility model.

FIG. 2 is an exploded view of the present invention.

FIG3 is a functional block diagram of the present utility model.

in:

Upper housing assembly 1, lower housing assembly 2, fixing part 3, guide rail locking part 4, circuit board 5, external current and leakage current socket 6, LCD indicator light 7, current input terminal 8, leakage current input terminal 9, communication output port 10, auxiliary power input terminal 11.

Implementation

In order to better understand the technical solution of the present invention, the following will be described in detail in conjunction with the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention, and are only implementations that can be adopted by the technical solution of the present invention. It should be noted that the description of the positional relationship of each component in this article, such as component A being located above component B, is based on the description of the relative positions of the components in the illustration, and is not intended to limit the actual positional relationship of the components.

Example 1

Referring to Figures 1-2, Figure 1 shows a schematic diagram of the structure of the utility model. As shown in the figure, the utility model relates to a multi-channel current and leakage current monitoring device, which includes a housing and a circuit board 5 arranged in the housing, the housing is composed of an upper housing component 1 and a lower housing component 2, the upper housing component 1 and the lower housing component 2 are fixedly connected by snaps and self-tapping screws, the bottom surface of the lower housing component 2 is respectively inserted with fixing parts 3, the fixing parts 3 are used for wall-mounted fixed installation; the bottom surface of the lower housing component 2 is respectively provided with guide rail locking parts 4, the guide rail locking parts 4 are plugged into the bottom surface of the lower housing component 2, and are used for guide rail installation.

The circuit board 5 is welded with a plurality of external current and leakage current sockets 6 .

The circuit board 5 is also welded with 8 current input terminals 8, 2 leakage current input terminals 9, a communication output port 10 and an auxiliary power input terminal 11, all of which are exposed on the top surface of the upper shell assembly 1; the current input terminal 8 is externally connected to a precision current transformer, and the transformer output terminal is divided into two wires, S1 and S2, which are respectively connected to the "+" and "-" of the current input segment to input a mA-level current signal, and the actual current data of the device can be monitored through this current signal; the leakage current input terminal 9 is externally connected to the leakage current, and is respectively connected to the "+" and "-" of the leakage current input segment to input a mA-level leakage current signal, and the actual leakage current data of the device can be monitored through this leakage current signal; the communication output port 10 can upload the above-mentioned current and floor current data to the upper computer software, and can also support the setting of parameters such as current transformation ratio, instrument address, baud rate, etc. through the communication port; the auxiliary power input 11 is used to power the device, and supports DC 24V voltage power supply.

The top surface of the upper housing assembly 1 is provided with two LCD indicator lights 7, which are an operation indicator light and a communication indicator light.

See Figure 3, which shows a functional block diagram of the utility model. As shown in the figure, the circuit board 5 is provided with an MCU chip, which is respectively connected to the communication unit, the power supply unit, the LED control unit and the optical coupling isolation unit, the optical coupling isolation unit is connected to the AC metering chip, and the AC metering chip is respectively connected to the AC current acquisition unit and the AC leakage current acquisition unit; wherein the MCU, the AC metering chip and the communication unit constitute a comprehensive data processing unit, which can realize the collection, reading and analysis and sending of data such as current and leakage current.

working principle:

The utility model provides a multi-channel current and leakage current monitoring device, wherein an upper shell plastic component and a lower shell plastic component are connected to form a hollow shell, wherein a circuit board, an external current and leakage current socket and an LCD indicator light are all arranged in the hollow shell; a plastic fixing part and a plastic guide rail locking part are installed at the lower part of the lower shell plastic component, wherein the plastic fixing part can support wall-mounted fixed installation, and the plastic guide rail tightening part can support card standard guide rail installation, and a variety of installation methods can be selected according to the actual situation on site of the customer, and the structure has the advantages of being simple and compact, having high assembly efficiency, being safe and reliable, etc.

The utility model includes multiple current input terminals, multiple leakage current input terminals, communication terminals, and auxiliary power input terminals. Among them, multiple current input terminals can be connected to multiple current sensors, and each channel can independently monitor the current of the load; multiple leakage current input terminals can be connected to multiple leakage current sensors, and each channel can independently monitor the leakage current of the load; the auxiliary power terminal can be connected to a DC24V power supply to power the monitoring device and realize data collection and uploading of the monitoring device; the comprehensive data processing unit includes an MCU, an AC metering chip, and a communication unit, which can collect the monitoring data of each current and leakage current channel and process and analyze the monitoring data; the communication terminal can be connected to a communication device to realize data upload and analysis.

The utility model comprises a current data acquisition unit of multiple channels, a leakage current data acquisition unit of multiple channels and a comprehensive data processing unit; wherein each channel can independently monitor the current or leakage current of the load, and the comprehensive data processing unit can collect the monitoring data of each channel and process and analyze the monitoring data, and finally output the above monitoring data through the RS485 communication port.

The utility model adopts a multi-channel design, which can realize the simultaneous monitoring of the current or leakage current of multiple channels, improving the monitoring range and efficiency; at the same time, each channel can independently monitor the current or leakage current of the monitoring load, improving the monitoring accuracy and stability. The monitoring device of the utility model supports standard rail installation, is easy to install, and has a width of no more than 10P, achieving a high degree of integration under the volume of the original instrument.

The above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the utility model.

Claims (4)

1. A multi-channel current and leakage current monitoring device, characterized in that: it comprises a shell and a circuit board (5) arranged in the shell, the shell comprising an upper shell component (1) and a lower shell component (2), the upper shell component (1) and the lower shell component (2) being connected by a snap, and a plurality of external current and leakage current sockets (6) being welded on the circuit board (5); a top surface of the upper shell component (1) is provided with a multi-channel current input terminal (8) and a multi-channel leakage current input terminal (9), and a communication output port (10) and an auxiliary power supply input terminal (11), and the bottoms of the current input terminal (8), the leakage current input terminal (9), the communication output port (10) and the auxiliary power supply input terminal (11) are all welded on the circuit board (5); an MCU chip is arranged on the circuit board (5), the MCU chip is respectively connected to a communication unit, a power supply unit, an LED control unit and an optical coupling isolation unit, the optical coupling isolation unit is connected to an AC metering chip, and the AC metering chip is respectively connected to an AC current acquisition unit and an AC leakage current acquisition unit. 2. A multi-channel current and leakage current monitoring device according to claim 1, characterized in that: fixing parts (3) are respectively inserted at both ends of the bottom surface of the lower shell component (2), and the fixing parts (3) are used for wall-mounted fixed installation. 3. A multi-channel current and leakage current monitoring device according to claim 1, characterized in that: guide rail locking pieces (4) are respectively provided at both ends of the bottom surface of the lower shell component (2), and the guide rail locking pieces (4) are plugged into the bottom surface of the lower shell component (2) for guide rail installation. 4. A multi-channel current and leakage current monitoring device according to claim 1, characterized in that two LCD indicator lights (7) are provided on the top surface of the upper housing component (1).