As the core equipment for overvoltage protection in power systems, the operation status of lightning arresters directly affects the reliability of the power grid. The abnormal changes in leakage current of lightning arresters are often early signals of internal moisture, valve plate aging, or insulation degradation. Launched by Liou Measurement and ControlLE-MOA-601LZThe wireless lightning arrester leakage current meter uses digital technology to achieve real-time monitoring and intelligent analysis of leakage current, providing accurate basis for the state evaluation of lightning arresters. This article will provide a detailed introduction to the application scenarios, technical advantages, and operational points of the device.

1、 Core function: high-precision monitoring and intelligent diagnosis

1. Multi parameter synchronous acquisition, comprehensively reflecting the status of lightning arresters

LE-MOA-601LZThe leakage current meter can simultaneously measure the full current of the lightning arrester（mAGrade), resistive current（μALevel) and third harmonic content, and upload the data to the monitoring platform through a wireless transmission module. For example, when the proportion of resistive current exceeds due to aging of the lightning arrester valve plate20%At this time, the system will automatically trigger an alert, prompting the operation and maintenance personnel to focus on inspection. Its measurement accuracy reaches±1%±2μASatisfyDL/T 596-2021According to the "Preventive Testing Regulations for Power Equipment".

2. Wireless transmission and remote analysis to improve operational efficiency

Device supportLoRaWireless communication technology, with a single base station coverage radius of up to1.5kmIt is easy to establish a monitoring network for substations or transmission lines. Through the accompanying upper computer software, operation and maintenance personnel can view leakage current curves, historical trends, and alarm records in real time, achieving“Condition Monitoring-data analysis-fault localization”Full process management. For example, a certain500kVAfter deploying the system in the substation, the operation and maintenance personnel used their mobile phones to access itAPPCan be remotely monitored200The operation status of the remaining lightning arresters has decreased, and the number of annual inspections has decreased60%.

2、 Technical advantage: Adapt to complex environments and ensure long-term stability

1. Anti interference design and wide temperature working range

Regarding electromagnetic interference, lightning surge, and other issues in the operating environment of outdoor lightning arrestersextremetemperatureLE-MOA-601LZAdopt the following protective measures:

Electromagnetic compatibility（EMC）Design: Isolate power frequency interference through a three-level filtering circuit to ensure stable measurement data.

IP67Protection level: Fully sealed metal shell dustproof and waterproof, suitable for-40℃to+85℃The wide temperature environment.

Self calibration function: Built in standard current source, can automatically correct sensor drift on a regular basis, reducing manual maintenance costs.

2. Easy installation and strong compatibility

The equipment adopts a puncture or magnetic installation method, without the need to disconnect the grounding wire of the lightning arrester,10Deployment can be completed within minutes. Its input range covers0.1mAto20mA, compatible with zinc oxide（MOA）Silicon carbide（SI）Waiting for various types of lightning arresters. For example, in the renovation of old substations, this equipment can directly replace traditional pointer ammeters and achieve digital upgrades.

3、 Typical application scenarios

1. Online monitoring of lightning arresters in substations

In110kVIn and above substations,LE-MOA-601LZLong term monitoring of the leakage current of the lightning arrester body and the equalizing ring, combined with environmental temperature and humidity data, to analyze the degradation trend of the valve plate. After a provincial power grid company applied the system, it successfully advanced ahead of schedule3Discovered one in a month220kVThe abnormal resistive current of the lightning arrester prevented line tripping accidents caused by lightning arrester explosions.

2. State assessment of lightning arresters for transmission lines

For line lightning arresters installed on iron towers, the equipment can be powered by solar energy+Wireless transmission solution to achieve long-term unmanned monitoring. For example, in a wind farm collection line, the system continuously monitors12After a month, accurately identify3The full current fluctuation of the lightning arrester was found to be caused by the aging of the sealing rubber ring after inspection. After replacement, the equipment returned to normal.

Conclusion: Digital empowerment drives the transformation of lightning arrester operation and maintenance

LE-MOA-601LZThe leakage current meter of the type wireless lightning arrester solves the pain points of data lag and low manual inspection efficiency in traditional monitoring methods through high-precision measurement, wireless transmission, and intelligent analysis functions. Its application not only improves the reliability of lightning arrester operation, but also facilitates state maintenance（CBM）The promotion of the model provides technical support. With the deepening of smart grid construction, this device will become an important tool to ensure the safe operation of the power system.