The LE-MOA-601LZ remote transmission lightning arrester online monitor developed and produced by LIOUSENSOR has self diagnostic function and intelligent status evaluation, which can monitor leakage current in real time and record the number of lightning strikes. Adopting LoRa wireless transmission technology, supporting fault warning and remote monitoring, with measurement accuracy of up to; #177; 2%, protection level IP67, suitable for environments ranging from -40 ℃ to 85 ℃, providing a comprehensive lightning arrester intelligent monitoring solution for 10-500kV power grids.

Remote transmission lightning arrester online monitorSelf diagnostic function fault warning status evaluation for nationwide shipment of Liou measurement and control

（LE-MOA-601LZ）

Product Introduction

The LE-MOA-601LZ lightning arrester online monitor is an online monitoring instrument for lightning arresters in AC high-voltage power systems. The instrument integrates a milliampere meter and a counter, and is connected in series in the grounding circuit of the lightning arrester. The milliampere meter in the monitor is used to monitor the leakage current bee value of the operating voltage crossing the lightning arrester, which can effectively detect whether the inside of the lightning arrester is damp or whether the internal components are abnormal; The counter records the number of actions of the lightning arrester under overvoltage. The monitor is equipped with a stainless steel shielding ring and a heat shrink insulated down lead. The leakage current outside the porcelain sleeve is transmitted through the metal ring between the skirts of the monitor porcelain sleeve and into the inner middle right milliampere meter. The scale on the milliampere meter reflects the conductivity of the fouling layer in uS, taking into account the creepage distance of the porcelain sleeve used by major lightning arrester manufacturers in China and the shape of the insulator. The upper scale of the watch is suitable for ordinary porcelain skirts, and the lower scale is suitable for anti fouling porcelain skirts of different sizes.

Product Features

1. Measure the total current, resistive current, and number of lightning strikes

2. Supports both on-site display and remote monitoring modes, making it easy to use

3. Adopting LoRa wireless communication technology, it is self-contained and does not require wiring, making installation easy

4. Adopting self powered mode, ultra-low power consumption design, and long product life;

5. Adopting LCD screen display, real-time display of accurate monitoring values.

Product features

1. Real time monitoring: It can monitor key parameters such as leakage current and action frequency of lightning arresters in real time, providing real-time data support for operation and maintenance personnel.

2. Data recording: It can record the historical data of lightning arresters, including the current magnitude and time of each lightning strike, providing a basis for subsequent fault analysis and handling.

3. Remote monitoring: Through wireless communication technology, the collected data is transmitted to a remote monitoring center to achieve remote monitoring and management of lightning arrester status.

4. Fault warning: When there is an abnormal situation with the lightning arrester, the digital meter can issue a warning signal to remind the operation and maintenance personnel to handle it in a timely manner.

The emergence of digital lightning arrester meters provides strong guarantees for the safe operation and maintenance of power systems.

Remote transmission lightning arrester online monitorTechnical Specifications

Installation Instructions

LE-MOA-601LZ monitor appearance

Installation diagram of LE-MOA-601LZ lightning arrester online monitor

The installation height of the LE-MOA-601LZ monitor should be appropriate to facilitate the on duty personnel to clearly see the milliampere meter pointer and the number of actions in the monitor.

The upper end of the monitor is connected to the bottom of the lightning arrester, and the lower end of the casing is connected to the grounding wire. When the fixed clamp or metal frame is grounded, the lower end of the monitor does not need to be repeatedly grounded.

The LE-MOA-601LZ monitor is equipped with a stainless steel shielding ring and an insulated lead wire. The shielding ring is installed about 3-4cm above the porcelain base, and the shielding ring is firmly connected to the metal ring in the middle of the monitor porcelain through the provided insulated lead wire. The insulated lead wire can be fixed to the lightning arrester lead wire with insulation tape to prevent swinging when the wind blows.

Maintenance and operation

When the glass on the observation hole of the monitor is affected by dust, it can be wiped off with a cloth or paper. There should be no small water droplets inside the glass. If a large number of water droplets are found, it indicates that the sealing performance of the monitor has been damaged. You can contact our company or affiliated factories for replacement.

When checking the action counter in the monitor, a simple method is to use 110-250V AC power, place the monitor on an insulating material, touch one end of the AC power against the housing, and briefly touch the other end against the terminal on the porcelain sleeve. At this time, the counter pointer will move one by one. If the shell is grounded, it is necessary to distinguish between the fire and ground wires of the AC power, connect the ground wire to the shell, and touch the live wire to the terminal. Another method is to charge the microfarad capacitor with an insulated shaker of 1000 volts or higher, and then discharge the capacitor to the monitor. Every time the power is discharged, the counting pointer in the monitor should jump once, and after a large swing of the milliampere meter pointer, it should return to its original position.

3. When using an external leakage current measuring instrument, first unscrew the cover of the external socket in the lower right corner, and insert a regular TV plug (with a hollow core wire) into the external socket of the monitor to connect the external measuring instrument in series to the leakage current circuit. After the measurement is completed, please make sure to tighten the socket cover.

After the detector is put into operation, observe whether the milliampere meter readings in each phase monitor are basically consistent. Require inspection personnel to observe and record in a timely manner. Once abnormal changes are found in the milliampere meter indication or individual phase monitors' red light-emitting tubes light up, they should promptly report to relevant parties.

When there is a fluctuation in the operating voltage, the milliampere meter indication in the monitor will have a slight change, which is normal.

If there is a significant change in the milliampere meter reading of any individual monitor in operation, please refer to the following experience for handling:

(1) A lightning arrester composed of two or more components, in which one component has an internal defect and gradually develops, the milliampere meter indication in the monitor gradually increases. If it increases by 30% compared to the original value, it must be vigilant; If it increases by 50% compared to the original value, it needs to be retired in a timely manner, otherwise an accident may occur.

(2) If the indication of the milliampere meter decreases or even returns to zero, it may be due to a significant decrease in insulation of the insulation base or damage to the internal components of the meter head or monitor. An external leakage current measuring instrument can be connected to the monitor socket, and the indication of the measuring instrument can be used to distinguish which factor is causing it.

Application Cases

Installation effect diagram 1 of leakage current meter

Installation effect diagram 2 of leakage current meter