The LE-MOA-601LZ passive wireless lightning arrester monitor developed and produced by LIOUSENSOR adopts innovative energy harvesting technology to achieve real-time monitoring of full current and discharge times, with automatic report generation and threshold adaptive adjustment functions. Supports LoRa/2.4G wireless transmission, complies with State Grid standards, has a protection level of IP67, and is suitable for environments ranging from -40 ℃ to 85 ℃. It provides a maintenance free lightning arrester status monitoring solution for smart substations.

Passive wireless lightning arrester monitorAutomatic report generation threshold, adaptive adjustment of data storage, sufficient supply of goods, Liou measurement and control

（LE-MOA-601LZ）

Product Introduction

The construction of smart substations is an important part of State Grid Corporation of China's modern equipment management system, an important measure to improve the level of equipment intelligence and the quality and efficiency of substation operation and inspection, and an important foundation for the digital transformation of the substation profession. At present, in the process of promoting the construction of smart substations, four new technologies and applications, including digital remote transmission meters, one key operation control, comprehensive monitoring of main and auxiliary equipment, and remote intelligent inspection, are relatively mature and particularly recognized by grassroots. Digital remote transmission of meters is one of them. From the perspective of operation and maintenance performance, manually copying meter values on site is a complex, inefficient, and repetitive labor. Through digital remote transmission, the digital collection and transmission of instrument data from the main equipment of the entire station will be achieved, which will greatly reduce the daily operation and maintenance workload, effectively reduce the workload of operation and maintenance personnel, and significantly improve operation and inspection performance. From the perspective of lean operation and maintenance, it is possible to achieve continuous monitoring of equipment, realize trend perception and sudden variable monitoring of data, which is conducive to lean operation and maintenance of equipment and will more effectively ensure equipment safety. The digital meter of lightning arrester has the product characteristics of accurate data perception, safe and efficient transmission, stable and reliable operation, and convenient maintenance.Passive wireless lightning arrester monitorIt can monitor the full current and discharge times in real time, with pointer meter display and electromagnetic counter functions, and has data remote transmission, alarm, and data storage functions. The installation method of this product is the same as that of traditional electromechanical leakage current monitoring devices, which is easy to install and maintenance free.

Device structure

Figure 1 External dimensions

The device casing adopts a corrosion-resistant cast aluminum structure, and non-metallic components are made of anti-aging materials.

Product features

Passive mode makes energy harvesting more convenient;

Using a pointer meter to display the full current ensures data stability and improves measurement accuracy;

No voltage signal required: high-speed sampling, using harmonic analysis method to calculate the resistive current of lightning arrester;

Passive working mode: using the leakage current of the lightning arrester itself to obtain energy, without the need to lay cables;

Secure and fast access, faster and more standardized transmission

Wireless transmission: Communication adopts State Grid standard low-power communication modules or Lora/2.4G modules, which comply with the construction specifications of the power Internet of Things;

Meets the information security requirements of State Grid Corporation of China and can quickly access various data management platforms;

Using CSS physical layer chips, supporting the protocol standards of State Grid's "Wireless Networking Protocol for IoT Node Equipment of Power Transmission and Transformation Equipment", "Communication Protocol for Micro Power Wireless Network of Power Transmission and Transformation Equipment IoT", and "Data Specification for IoT Sensor of Power Transmission and Transformation Equipment";

Adopting high-precision technology in the industry to provide more solutions for lightning arrester monitoring scenarios.

Using high-precision transformers, the amplification factor is automatically selected based on the magnitude of the measured current to achieve high-precision measurement;

Adopting dynamic phasor compensation algorithm to achieve high-precision measurement signal analysis;

Simple configuration, complete supporting facilities, 24-hour online work.

Adopting digital filtering algorithms to eliminate the "zero drift problem" caused by analog filters; Easy installation, flexible configuration, and the main equipment can be implemented without power outage;

The whole machine is designed with micro power, and the product can achieve 24-hour online operation;

Installation method

When installing the device, the inclination angle between the plane where the monitoring device panel is located and the horizontal plane should be less than 85 ° to avoid water accumulation affecting observation. At the same time, it can ensure that the observer has a good LCD viewing angle when observing on the ground. Fix the metal shell base onto the metal bracket with M10 screws and pass it through

Grounding through the grounding busbar (the monitoring device base can also be used as a grounding busbar), the other end is connected to the low voltage end of the lightning arrester through an electrode connected to the top of the insulator using a wire (or aluminum strip). Be sure to install firmly and ensure reliable contact.

Features

1. Automatic monitoring function: It can periodically automatically monitor the full current, number of actions, and action time of the lightning arrester.

Wireless communication function. This function is mainly for the LoRa wireless communication function of the lightning arrester monitoring device. Upload the characteristic data of the lightning arrester to the station aggregation node device through LoRa communication, and complete the data upload every 5 minutes.

The LoRa communication of the device complies with the "Q/GDW 12020-2019 Transmission and Transformation Equipment IoT Micro Power Wireless Network Communication Protocol" and can be directly connected to the perception layer of the transmission and transformation IoT without the need for other configurations.

2. Local display function: The lightning arrester action count is displayed using a 3-digit electromagnetic counter. The full current is displayed on a scale (the scale range can be configured). The scale has a normal area (green), a caution area (yellow), and an alarm area (red).

3. Automatic monitoring function: It can periodically automatically monitor the full current, number of actions, and action time of the lightning arrester.

4. Wireless communication function: This function is mainly the LoRa wireless communication function of the lightning arrester monitoring device. Upload the characteristic data of the lightning arrester to the station aggregation node device through LoRa communication, and complete the data upload every 5 minutes. The LoRa communication of the device complies with the "Q/GDW 12020-2019 Transmission and Transformation Equipment IoT Micro Power Wireless Network Communication Protocol" and can be directly connected to the perception layer of the transmission and transformation IoT without the need for other configurations.

5. Local display function: The lightning arrester action count is displayed using a 3-digit electromagnetic counter. The full current is displayed on a scale (the scale range can be configured). The scale has a normal area (green), a caution area (yellow), and an alarm area (red).

6. Alarm function: It has an abnormal alarm function. When the monitoring data exceeds the standard or the monitoring function fails, it will give a real-time alarm. The alarm settings can be modified, and the alarm information can be uploaded in real time.

7. Meter style appearance: The device adopts a meter style appearance structure, which is consistent with the installation size of traditional lightning arrester monitors and can be directly replaced for installation.

Technical Specifications

Installation requirements

The digital meter of DC lightning arrester should avoid strong vibration and impact during installation. This is because vibration and impact may cause damage to the mechanical structure and electronic components of the meter, thereby affecting its stability and accuracy. In order to ensure the long-term stable operation of the meter, necessary shock absorption and fixing measures should be taken during installation. The digital meter of DC lightning arrester should ensure good grounding and lightning protection measures during installation. Grounding is the key to ensuring the safe and stable operation of meters. It can effectively introduce lightning strikes and overvoltages into the ground, thereby protecting meters and power equipment from damage. At the same time, lightning protection measures are also essential, as they can further reduce the threat of lightning to meters and power equipment. During installation, grounding and lightning protection treatment should be strictly carried out in accordance with relevant standards and specifications.

Application Cases