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SA-30i Surge Arrester Analyzer

The SA-30i is a high-precision surge arrester analyzer designed for testing metal-oxide arresters (MOA) in distribution and transmission networks. It measures resistive leakage current, total current, harmonics, power loss, and phase angle, providing a complete condition assessment for arresters from 3 kV up to EHV class equipment.

Key Features

  • Full online MOA leakage current analysis

  • Measures resistive, total, and harmonic currents simultaneously

  • High-accuracy DSP processing for stable results

  • Automatic voltage & harmonic compensation

  • Phase angle measurement for diagnosing insulation deterioration

  • Built-in data storage & USB export

  • Designed for substation noise environments

  • Rugged, lightweight, and field-portable

Technical Specifications

Parameter Specification
Applicable Arrester Voltage 3–500 kV systems
Resistive Leakage Current 0–10 mA, accuracy ≤ ±1%
Total Leakage Current 0–10 mA, accuracy ≤ ±1%
Harmonic Analysis 1st–3rd harmonic
Phase Angle Accuracy ≤ ±1°
Display Large backlit LCD
Data Storage Internal memory + USB
Power Supply 220 V AC or internal rechargeable battery
Operating Temperature –10 °C to +50 °C
Weight Approx. 5–6 kg

Standard Accessories

  • Measurement leads

  • Clamp-on current sensor

  • USB data cable

  • Power adaptor

  • Carry case

  • User manual & certificate

Applications

  • Online monitoring of surge arresters in substations

  • Diagnosing ageing arresters, contamination, or moisture ingress

  • Field and maintenance crew testing on distribution feeders

  • MOA insulation trending for predictive maintenance

Optional Add-Ons

  • Extended HV insulated leads

  • Hard-shell protective case

  • On-site thermal printer for report output

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