Leakage Current Analyzer for Online Condition Analysis of Metal Oxide Surge Arrestor
Description: Beacon Make Leakage Current Analyzer is a state of the art Portable On-line test system for Condition Monitoring, Residual Life Assessment and Health Check of Metal Oxide Surge / Lightning Arrestors without any interruption of service operation. The system provides immediate assessment of condition of Surge Arrestors through direct display of the 3rd harmonic resistive leakage current and total leakage current in micro-ampere.
Leakage Current Analyzer has been built for operation, analysis and data measurement in live switchyard conditions. Report generation of measured data can be easily performed by connecting to a laptop / computer. The system comes as a complete functional unit in a lightweight and rugged carrying case for easy and safe transportation.
LCA Features and Benefits
- Continuous Monitoring: : LCA can be used for continuous monitoring of one or more arresters to investigate details in leakage current changes versus time. LCA can also be provided with solution to include on-line configuration using modem communication between LCA instrument and PC software.
- Data Management: LCA is supplied complete with LCA Data Management Software for handling all your surge arrester readings. It defines individual surge arrester types including operational parameters. The Software is easy to operate and supports data representation with capability to perform evaluation on groups of surge arresters such as same type of arresters or alternatively for a region.
- Portable: Portable: LCA is one of its class battery operated instrument for inspection of surge arresters for condition assessment on a regular basis, thus providing much desired portability for maintenance engineers
- Cost effective::Cost effective: Inspection of a surge arrester takes less than 10 minutes on location and can be performed with the arrester in live operation without any disturbance of power distribution or need for any shutdown.
Principle of Operation
Leakage Current Analyzer is based upon well-proven and acknowledged monitoring technique using third-order harmonic analysis with compensation for harmonics in system voltage. The stated technique is rated in accordance with method B2 of IEC 60099-5 and is the best field monitoring technique for Metal Oxide Surge Arresters. It performs Very fast measurement through specially designed and easily mountable, low-noise clamp-on CT and field probe.
Applications
The Leakage Current Monitoring of Surge Arrestors has been used since decades to determine short term as well as long term measurements on arresters upto 765kV networks, and is today delivered to power companies and utilities across the globe.
LCA Measurements
The following parameters with Continuous Online Representation are accurately displayed with LCA in charged switchyard conditions:
- Total Leakage Current
- Third Harmonic Resistive Leakage Current
- Field Probe Current
- Corrected value of Resistive Leakage Current normalized to standard ambient temperature (+20°C) and 70 % of rated arrester voltage based on recorded temperature and operating voltage during field measurement.
- This corrected value enables the Measurements performed under different conditions can thereby easily be compared.
Technical Specifications
- Total Leakage Current : 0 to 20 mA
- Third Harmonic Resistive Leakage Current : 0 to 20 mA
- Field Probe Current : 450 mm(W) x 450 mm(D) x 400 mm(H)
- Resolution : 0.1 µA (for all above currents)
- Accuracy : +- 1% of reading
Operating Parameters:
- Display : Big LCD Screen
- Memory: 1000 Results
- Communication: USB PC connectivity for data transfer
- Printer : In-built thermal paper printer
- Mains voltage :110 to 240 VAC, 50/60 Hz (±10%)
- Battery :Rechargeable Battery
- Capacity for single charge :12 hours approx
- Operating Temperature :0 °C to +50 °C
- Storage Temperature : -10 °C to +60 °C
- Humidity : 95% RH (Non condensing)
- Weight : 6 kg approx
