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IRT.20A Portable 20kV Insulation Resistance Tester

The IRT.20A is a digital, high-voltage insulation resistance tester capable of testing up to 20 kV and measuring insulation resistances up to 20 TΩ. With 8 selectable test voltages, real-time display of measurements, and automatic PI/DAR calculation, the IRT.20A is a robust and feature-rich tool for professional insulation diagnostics.

Built for demanding environments, this tester is IP65 rated, compliant with IEC safety and EMC standards, and includes advanced features like data logging, USB download, leakage current measurement, capacitance testing, and digital filtering for noise mitigation.

Key Features

  • Insulation resistance up to 20 TΩ @ 20 kV

  • 8 test voltages: 250V, 500V, 1kV, 2.5kV, 5kV, 10kV, 15kV, 20kV

  • Real-time LCD display of voltage & current curves

  • Automatic calculation of PI (Polarization Index) and DAR (Dielectric Absorption Ratio)

  • Capacitance & leakage current measurement

  • Adjustable short circuit current (max 6 mA)

  • USB storage and data download (up to 1000 test records)

  • Digital filtering for interference suppression

  • Automatic discharge and timed tests (1 to 99,999 sec)

  • Overload & fuse protection

  • Rechargeable lithium-ion battery for 4+ hours of 20kV testing

Technical Specifications

Test Voltage Range

  • Selectable: 250 V, 500 V, 1,000 V, 2,500 V, 5,000 V, 10,000 V, 15,000 V, 20,000 V

Insulation Resistance Range

  • Up to 20 TΩ

Test Voltage Accuracy

  • 100% to 110% of nominal

Voltage Measurement Accuracy

  • ±5% + 3 V

Short Circuit Current

  • Adjustable, up to 6 mA
    (Rated default: 5 mA)

Current Measurement

  • Range: Up to 10 mA

  • Accuracy: ±5% + 0.2 nA

Capacitance Measurement

  • Range: 0 – 20 μF

  • Accuracy: ±10% + 10 nF

Power Supply

  • 220V ±10%, 50/60 Hz, 20 VA (AC)

  • 16.8 V Lithium-ion rechargeable battery

Battery Life

  • Up to 4 hours at 20 kV / 100 MΩ load

Data Storage & Output

  • Internal memory: Up to 1000 test records

  • USB port for data download & analysis

Timing Function

  • Test duration: 1 – 99,999 seconds

Display

  • Digital LCD with real-time voltage/current curve

Safety Standards

  • IEC 61010-1 CAT IV 600V

  • IEC 61326-1 (EMC compliance)

  • IP65 protection (lid closed)

Physical Characteristics

Specification Value
Dimensions 37 cm × 27 cm × 17 cm
Weight Approx. 3.8 kg (8.4 lbs)

 

 

Application

  • High-voltage cable testing (overhead & underground)

  • Generators, transformers, motors

  • Substation equipment

  • Industrial electrical maintenance

  • Research & development

Included Accessories

  • High-voltage test leads

  • Guard terminal lead

  • USB cable

  • Power adapter

  • Carrying case

  • Operating instructions manual

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