CN209264883U - On-line residual current monitoring device - Google Patents

Abstract

The utility model relates to a residual current online monitoring device, comprising a residual current monitoring terminal and a residual current transformer; the residual current monitoring terminal comprises a housing, a circuit board arranged in the housing, a power supply connected to the circuit board and a circuit control module , the circuit board includes an acquisition module, a button input module, an LED indicator module, a storage module, and a communication module; the residual current transformer continuously collects the currently connected residual current value, and collects it through the acquisition module of the residual current monitoring terminal The residual current signal is stored through the storage module, and the residual current information is automatically reported through the communication module. The utility model realizes the function of reporting the collected data of the residual current, and sends out an alarm message when the leakage exceeds the limit, which is convenient for finding the leakage point and eliminating the leakage fault.

Description

On-line residual current monitoring device

technical field

The utility model relates to a residual current online monitoring device.

Background technique

At this stage, intelligent leakage protectors have been widely used in rural low-voltage power distribution networks. However, due to the complex situation and harsh environment of rural power distribution networks, there are still many links that urgently need to be perfected in the operation of intelligent leakage protectors.

According to the operation of leakage protectors in current practical applications, it is difficult to find the occasional leakage of user equipment and lines, which makes the actual operation of power supply lines have great potential safety hazards. Therefore, it is urgent to provide a leakage detection device for troubleshooting Leakage problems in transmission lines and users.

Utility model content

The technical problem to be solved by the utility model is to provide an on-line residual current monitoring device, which is convenient for searching user equipment and occasional leakage problems of lines.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

The residual current online monitoring device includes a residual current monitoring terminal and a residual current transformer; the residual current monitoring terminal includes a housing, a circuit board arranged in the housing, a power supply connected to the circuit board, and a circuit control circuit connected to the circuit board module, the circuit board includes an acquisition module, a button input module, an LED indicator module, a storage module, and a communication module; the residual current transformer continuously collects the currently connected residual current value, and monitors the terminal through the storage module of the residual current Realize the storage of residual current information, and automatically report the residual current information through the communication module.

By adopting the above technical scheme, the residual current monitoring terminal and the residual current transformer cooperate to monitor the safe operation of the power grid online, which is convenient for finding leakage points and eliminating leakage faults; the residual current detection terminal adopts a modular design, which is low in construction cost and difficult Small, practical, each module is relatively independent, and the modules can be debugged separately. The structure is simple, and the operation of debugging and maintenance is convenient. The module automatically reports the residual current information, so as to realize the function of collecting and reporting the residual current.

Preferably, the communication module includes a remote communication module and a local communication module.

By adopting the above-mentioned technical solution, the communication mode adopts a diversified design, so as to meet the working needs of various communication modes.

Preferably, the remote communication module includes a GPRS communication interface or a CDMA communication interface.

By adopting the above technical solution, the remote communication module adopts a modular design, which has unlimited transmission distance, low bit error rate, no need for self-organizing network, easy expansion, and convenient installation; and changing the communication mode does not need to replace the entire device, and supports thermal Plug in.

Preferably, the local communication module includes an infrared communication interface or an RS485 communication interface.

By adopting the above technical solution, the infrared communication interface realizes small angle, short distance, point-to-point direct data transmission, convenient connection and strong confidentiality; the RS485 communication interface has fast data transmission speed and good anti-noise interference.

Preferably, the residual current transformer is an open type residual current transformer.

By adopting the above technical scheme, the open-type residual current transformer is easy to install, can be operated with electricity, does not affect the normal electricity consumption of customers, saves manpower, material resources, and financial resources, improves efficiency, and has high sensitivity, good stability, and strong anti-electromagnetic Interference ability.

Preferably, the circuit control module adopts MCU processor.

By adopting the above technical solution, the MCU processor has high integration, small size, good reliability, easy to take electromagnetic shielding or sealing measures, and is suitable for working in harsh environments; and has strong control ability, easy to expand, and can be parallel or serial according to needs. Line expansion, flexible use.

Preferably, a buzzer is provided inside the housing, and an alarm module connected to the buzzer is provided on the circuit board.

By adopting the above technical solution, the terminal can judge whether the residual current value or the voltage value satisfies the alarm condition, and when the limit is detected, the buzzer will sound to realize the sound alarm of the limit and play a warning role.

Preferably, the alarm module is provided with an alarm signal input terminal, the control module is provided with an alarm signal output terminal, and the alarm signal output terminal is electrically connected to the alarm signal input terminal.

By adopting the above technical scheme, the input and output of the alarm signal are realized through the alarm signal input terminal and the alarm signal output terminal, and the signal transmission is stable and safe.

In summary, the utility model has the following advantages:

1. The residual current detection terminal adopts a modular design, each module is relatively independent, and the module can be debugged separately, the structure is simple, the operation such as debugging and maintenance is convenient, the construction cost is low, the difficulty is small, and it is implementable;

2. Realize the function of collecting and reporting the residual current. When the residual current or the power supply voltage is detected to exceed the limit, the buzzer will sound to realize the over-limit sound alarm, which is convenient for finding leakage points and eliminating leakage faults. It is very important for the safe operation of the power grid important meaning;

3. Using the GPRS communication interface to transmit data, it has the characteristics of unlimited transmission distance, low bit error rate, no need for self-organizing network, easy expansion, and convenient installation;

4. The circuit control module adopts MCU processor, with high integration, small size, good reliability, easy to take electromagnetic shielding or sealing measures, suitable for working in harsh environments; and strong control ability, easy to expand, can be parallel or serial extension.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic structural diagram of the control system of the present invention.

Reference signs:

1. Residual current monitoring terminal; 2. Residual current transformer; 3. Shell; 4. Power supply; 5. Circuit board; 6. Circuit control module; 7. Acquisition module; 8. Key input module; 9. LED indication Light module; 10. Storage module; 11. Communication module; 12. Alarm module; 13. Clock module.

Detailed ways

The residual current online monitoring device, as shown in Figure 1 and Figure 2, includes a residual current monitoring terminal 1 and a residual current transformer 2, through the cooperation of the residual current monitoring terminal 1 and the residual current transformer 2, the online monitoring of the safe operation of the power grid is carried out, which is convenient Find the leakage point to facilitate the troubleshooting of leakage faults.

Wherein, the residual current monitoring terminal 1 includes a housing 3, a circuit board 5 arranged in the housing 3, a power supply 4 connected to the circuit board 5 and a circuit control module 6, and the circuit board 5 includes an acquisition module 7 and a key input module 8 , LED indicator module 9, storage module 10 and communication module 11; residual current transformer 2 continuously collects the residual current value of current access, collects the residual current signal through the acquisition module 7 of the residual current monitoring terminal 1, and then passes through the storage module 10 realizes the storage of residual current information, and automatically reports the residual current information through the communication module 11.

Wherein, the communication module 11 includes a remote communication module and a local communication module, and the communication mode adopts a diversified design to meet the working needs of multiple different communication modes; and the remote communication module also adopts a modular design, and the remote communication module includes a GPRS communication interface or a CDMA The communication interface has unlimited transmission distance, low bit error rate, no self-organizing network, easy expansion, and convenient installation; and changing the communication mode does not need to replace the entire device, and supports hot plugging.

The local communication module includes infrared communication interface or RS485 communication interface; the infrared communication interface realizes small angle, short distance, point-to-point direct data transmission, convenient connection and strong confidentiality; RS485 communication interface has fast data transmission speed and good anti-noise interference.

The residual current transformer 2 adopts the open-type residual current transformer 2. The open-type residual current transformer 2 is easy to install and can be operated under live conditions without affecting the normal power consumption of customers, saving manpower, material resources and financial resources, improving efficiency, and has high sensitivity and stability. Good performance, strong anti-electromagnetic interference ability.

The circuit control module 6 adopts MCU processor, which has high integration, small size, good reliability, easy to take electromagnetic shielding or sealing measures, and is suitable for working in harsh environments; it has strong control ability and is easy to expand, and can be expanded according to needs Parallel or serial expansion.

The inside of the housing 3 is also provided with a buzzer, and the circuit board 5 is provided with an alarm module 12 connected to the buzzer, the alarm module 12 is provided with an alarm signal input end, and the control module is provided with an alarm signal output end, the alarm The signal output terminal is electrically connected to the alarm signal input terminal, and the signal transmission is stable and safe; through the terminal, it is judged whether the residual current value or voltage value meets the alarm condition.

In addition to the above-mentioned preferred embodiment, the utility model also has other implementation modes, those skilled in the art can make various changes and deformations according to the utility model, as long as they do not depart from the spirit of the utility model, all should belong to the appended rights of the utility model The scope defined by the requirement.

Claims (9)

1. The residual current online monitoring device is characterized in that: it includes a residual current monitoring terminal and a residual current transformer; the residual current monitoring terminal includes a housing, a circuit board arranged in the housing, a power supply connected to the circuit board, and A circuit control module connected to a circuit board, the circuit board including an acquisition module, a button input module, an LED indicator module, a storage module and a communication module; The storage module of the current monitoring terminal realizes the storage of residual current information, and automatically reports the residual current information through the communication module. 2. The online residual current monitoring device according to claim 1, wherein the communication module includes a remote communication module and a local communication module. 3. The online residual current monitoring device according to claim 2, characterized in that: the remote communication module includes a GPRS communication interface or a CDMA communication module. 4. The online residual current monitoring device according to claim 2, wherein the local communication module includes an infrared communication interface or an RS485 communication interface. 5. The online residual current monitoring device according to claim 1, characterized in that: the residual current transformer adopts an open type residual current transformer. 6. The online residual current monitoring device according to claim 1, characterized in that: said circuit control module adopts MCU processor. 7. The online residual current monitoring device according to claim 1, wherein a buzzer is provided inside the housing, and an alarm module connected to the buzzer is provided on the circuit board. 8. The residual current online monitoring device according to claim 7, characterized in that: the alarm module is provided with an alarm signal input terminal, and the control module is provided with an alarm signal output terminal, and the alarm signal output terminal is connected to the The alarm signal input end is electrically connected. 9. The online residual current monitoring device according to claim 1, wherein a clock module is provided on the circuit board.