Product Details

Leakage Current Monitor LCM500

Adiradh offers the Doble LCM500 Leakage Current Monitor for assessing the condition of metal-oxide surge arresters in electrical power systems. It measures total leakage current and resistive leakage current to help engineers evaluate arrester performance. Moreover, it supports in-service testing, so maintenance teams can assess suitable surge arresters without taking them out of operation. This approach helps utilities monitor equipment condition during routine inspections.

In addition, the LCM500 records measurements for later review and comparison. Its wireless sensors support field measurements, while the instrument stores up to 1,000 surge arrester IDs and associated readings. Furthermore, the LCM Viewer software helps users review, compare, and report test results. Therefore, engineers can track changes in arrester condition over time. The instrument is suitable for electrical substations, power utilities, and high-voltage maintenance teams. Consequently, it supports condition-based maintenance and helps identify surge arresters that may need further investigation.

Overview

The Doble LCM500 is a portable instrument for checking metal-oxide surge arresters during normal service. It measures total leakage current from 200 to 16,000 µA and resistive leakage current from 0 to 9,000 µA. Moreover, it uses a field probe and a wireless current probe to collect measurement data.

The instrument stores up to 1,000 arrester IDs and their associated measurements. In addition, users can transfer recorded data to a computer for analysis through LCM Viewer software. This process helps engineers compare results from different inspections. Furthermore, the software supports data review, reporting, and the comparison of multiple measurement files.

The LCM500 also supports field assessment in substations and electrical networks. Therefore, it is useful for utilities, power plants, and maintenance contractors that inspect surge arresters as part of their asset management programs.

Datasheet for Leakage Current Monitor LCM500

About Product

The Doble LCM500 Leakage Current Monitor uses third-harmonic analysis with compensation to assess metal-oxide surge arresters. This method helps evaluate the resistive component of leakage current, which can provide information about the condition of the arrester’s metal-oxide blocks. Moreover, the instrument records operating voltage and temperature during field measurements.

The system normalizes measurements to standard reference conditions using the recorded voltage and temperature. Consequently, engineers can compare results taken under different operating conditions more effectively. The total leakage current range is 200–16,000 µA, while the resistive current range is 0–9,000 µA. In addition, the specified measurement accuracy is ±5% or ±5 µA.

The LCM500 supports wireless measurement probes and computer-based data management. Furthermore, its internal battery provides approximately eight hours of operation, with a typical charging time of 1.5 hours. These functions support routine inspections and long-term monitoring of surge arrester condition.

Technology & Benefits

The Doble LCM500 uses compensated third-harmonic analysis to assess the resistive leakage current of metal-oxide surge arresters. This measurement helps engineers examine changes in arrester condition during service. Moreover, the instrument records operating voltage and temperature, allowing measurements to be normalized to reference conditions.

The wireless current probe and field antenna support data collection during field inspections. In addition, the instrument stores arrester identification details and associated readings. Therefore, maintenance teams can organize results by individual arrester and compare measurements over time.

The LCM Viewer software further supports analysis by allowing users to view, compare, save, and print measurement data. Consequently, engineers can identify changes that may require closer inspection. The instrument also supports short-term monitoring when users need to investigate changes in leakage current. These functions help utilities plan maintenance based on measured equipment condition rather than inspection schedules alone.

Key Features

• Portable, battery-operated leakage current monitor.
• Designed for in-service assessment of metal-oxide surge arresters.
• Total leakage current measurement range: 200–16,000 µA.
• Resistive leakage current measurement range: 0–9,000 µA.
• Measurement accuracy: ±5% or ±5 µA.
• Third-harmonic analysis with compensation.
• Wireless current probe and field antenna.
• Storage for up to 1,000 surge arrester IDs and associated measurements.
• Records operating voltage and temperature during field measurements.
• Automatic normalization of measurements to reference conditions.
• LCM Viewer software for measurement review and reporting.
• Data comparison and trend analysis support.
• Internal rechargeable 9.6 V, 2,600 mAh battery.
• Approximately eight hours of battery operation.
• Typical charging time of 1.5 hours.
• Operating temperature range: -10°C to +50°C.
• IP67 protection with the case closed, according to the manufacturer’s specification.

Applications

• Metal-oxide surge arrester condition assessment.
• In-service surge arrester testing.
• High-voltage substation maintenance.
• Power utility asset management.
• Power plant electrical maintenance.
• Leakage current measurement in surge arresters.
• Resistive leakage current monitoring.
• Routine inspection of surge arresters.
• Short-term monitoring of arrester performance.
• Comparison of historical test measurements.
• Condition-based maintenance programs.
• Investigation of changes in surge arrester leakage current.

Advantages

• Supports surge arrester assessment without taking suitable equipment out of service.
• Helps identify changes in resistive leakage current.
• Supports comparison of measurements taken under different conditions.
• Stores arrester identification details and associated readings.
• Reduces the need for manual record keeping during data analysis.
• Provides wireless measurement capabilities for field inspections.
• Helps engineers track arrester condition over time.
• Supports maintenance planning through measurement trends.
• Enables computer-based review and reporting.
• Supports routine inspections and further diagnostic investigation.

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