Product Details

Metal oxide surge arrester test set SCAR 10

Adiradh offers the ISA SCAR 10 Metal Oxide Surge Arrester Test Set for checking the condition of metal oxide surge arresters in high-voltage power systems. The instrument measures leakage current while the arrester remains in service. Therefore, maintenance teams can assess arrester condition without disconnecting the equipment for this measurement. Moreover, the SCAR 10 uses third-harmonic analysis with compensation to help identify changes in arrester performance. This method supports the assessment of metal oxide surge arresters installed in transmission and distribution networks.

In addition, the instrument includes a special C 47-IS clip-on current transformer for measuring leakage current in areas with strong electric and magnetic fields. Its design helps reduce the effects of these fields on the measurement. Furthermore, the SCAR 10 follows the diagnostic approach described in IEC 60099-5 A1. Consequently, electrical utilities, substation maintenance teams, and testing contractors can use it for routine inspections and condition assessment. It supports maintenance planning by helping engineers identify surge arresters that may require further investigation.

Overview

The ISA SCAR 10 is a portable test instrument designed for the online diagnosis of metal oxide surge arresters. It measures leakage current in the arrester’s ground connection while the equipment remains in service. Moreover, it analyses the third harmonic component of the leakage current to help assess arrester condition.

The system includes a measuring instrument and a specialised C 47-IS clip-on current transformer. In addition, the instrument measures the true RMS value and peak value of the total current, the true RMS value of the third harmonic, and temperature. Therefore, engineers can examine several measurement values during field inspections.

The SCAR 10 uses compensated third-harmonic analysis in line with the diagnostic methods described in IEC 60099-5 A1. Furthermore, its automatic measurement range selection supports measurements across different current levels. The instrument is suitable for high-voltage transmission networks, distribution systems, substations, and electrical utility maintenance programs.

Datasheet for Metal oxide surge arrester test set SCAR 10

About Product

The ISA SCAR 10 Metal Oxide Surge Arrester Test Set uses a clip-on current transformer to measure leakage current flowing through the ground connection of an operating surge arrester. This method supports online diagnostics without requiring the arrester to be disconnected for the measurement. Moreover, the instrument examines the third harmonic component of the leakage current, which helps engineers assess possible changes in arrester condition.

The C 47-IS current transformer has a 1000:1 current ratio and a 47-ohm load resistance. In addition, its frequency response is specified as less than 0.5 dB attenuation from 50 Hz to 10,000 Hz. The clamp has a tightening diameter of 54 mm and a jaw opening greater than 55 mm.

The measuring instrument uses a backlit liquid crystal display with 3.5 digits. Furthermore, it indicates the selected measurement range in microamperes or milliamperes and warns users when the battery is low. These functions support practical use during field inspections.

Technology & Benefits

The SCAR 10 uses compensated third-harmonic analysis to assess the leakage current of metal oxide surge arresters. The resistive component of leakage current can increase as the arrester ages or experiences electrical and environmental stress. Therefore, measuring the third harmonic can help engineers identify changes that may need further investigation.

Moreover, the specialised clip-on current transformer supports leakage current measurement in areas with strong electric and magnetic fields. Its screened design helps reduce unwanted field effects. In addition, the signal preamplifier is located in the transformer handle, which helps limit interference picked up by the connecting cable.

The instrument automatically selects the appropriate measurement range according to the current level. Furthermore, its built-in calibration-check circuit generates a triangular waveform with known values for checking the instrument’s response. Consequently, technicians can carry out field measurements and equipment checks using the same test system. These functions support routine inspections, condition assessment, and maintenance planning for surge arresters in transmission and distribution networks.

Key Features

• Online diagnostic testing of metal oxide surge arresters.
• Third-harmonic leakage current analysis with compensation.
• Measurement approach based on IEC 60099-5 A1.
• True RMS measurement of total leakage current.
• Peak value measurement of total leakage current.
• True RMS measurement of the third harmonic.
• Temperature measurement.
• Special C 47-IS clip-on current transformer.
• Current transformer ratio of 1000:1.
• Screened current transformer design to reduce electric and magnetic field effects.
• Signal preamplifier located in the current transformer handle.
• Automatic measurement range selection.
• Backlit 3.5-digit LCD.
• LED indication of the µA or mA measurement range.
• Low-battery warning.
• Built-in calibration-check function.

Applications

• Online testing of metal oxide surge arresters.
• Surge arrester condition assessment.
• High-voltage transmission network maintenance.
• Electrical distribution network inspections.
• Substation maintenance and diagnostics.
• Leakage current measurement in surge arresters.
• Third-harmonic leakage current analysis.
• Inspection of surge arresters in service.
• Electrical utility asset maintenance.
• Condition assessment by testing contractors.
• Investigation of changes in arrester leakage current.
• Preventive maintenance planning for surge protection equipment.

Advantages

• Supports leakage current measurements while suitable surge arresters remain in service.
• Helps assess arrester condition through third-harmonic analysis.
• Reduces the need to disconnect equipment solely for this measurement.
• Uses a specialised current transformer for field measurements.
• Helps limit the effects of electric and magnetic fields on measurements.
• Provides total current, peak current, third-harmonic current, and temperature readings.
• Automatically selects the measurement range.
• Offers a backlit display for field use.
• Includes a calibration-check function.
• Supports routine inspection and maintenance planning.
• Helps engineers identify changes that may require further investigation.

Adiradh Energy offers Metal oxide surge arrester test set SCAR 10 in India; Hyderabad; Visakhapatnam; Vijayawada; Chennai; Puducherry; Trichy; Coimbatore; Hosur; Bangalore; Hubli; Mysore; Cochin; Kolkata; Pune; Goa; Mumbai; Thane; Kanpur; Jaipur; Nagpur; Delhi; Noida; Gurugam; Bh

opal; Vadodara; Ahmedabad; Chandigarh; Chandigarh; Tata Nagar; Raipur; Rudrapur; Durgapur; Kharagpur; Raigarh; Bhilai; Angul; Haldia; Jabalpur; Indore; Jamshedpur; Rajahmundry; Bokaro Steel City; Salem; Kochi; Rourkela; Ahmedabad ;Jamnagar; Bharuch; Sri City; Nashik; Haridwar; Mathura; Aurangabad; Bhubaneswar and other cities