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IRT.10B Portable 10kV Insulation Resistance Tester

The IRT.10B is a rugged, portable digital insulation resistance tester designed to perform high-voltage insulation tests up to 10 kV, measuring insulation resistance values up to 20 TΩ. With selectable voltage ranges from 250 V to 10,000 V, it is well-suited for applications such as cable testing, switchgear, high-voltage motors, and transformers.

Like its counterparts in the IRT series, it features a large LCD digital display, real-time curve plotting, automatic DAR/PI calculation, and an IP65-rated enclosure (with lid closed), providing safety and precision even in harsh environments.

Key Features

  • Test voltages: 250 V to 10,000 V (6 levels)

  • Insulation resistance measurement: Up to 20 TΩ

  • Real-time voltage/current curve display

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

  • Ramp test: Voltage ramps up in 10% increments

  • Filtered resistance test modes: 10s, 20s, 30s, 40s

  • Capacitance and leakage current measurement

  • Data storage: Up to 1000 test results

  • USB download for PC data analysis

  • Digital filtering for noise/interference rejection

  • Automatic discharge post testing

  • Timing test function: 1 – 99,999 seconds

  • Dual power: Operates on AC or battery

Technical Specifications

Test Voltage Levels

  • 250 V, 500 V, 1,000 V, 2,500 V, 5,000 V, 10,000 V

Insulation Resistance Range

  • Up to 20 TΩ

Voltage Accuracy

  • 100% – 110% of nominal value

Voltage Measurement Accuracy

  • ±5% + 3 V

Short Circuit Current

  • 5 mA

Ramp Test

  • Starts at 10% of preset voltage, increasing in 10% increments

Current Measurement

  • Precision: ±5% + 0.2 nA

Capacitance Measurement

  • Range: 0 – 99.99 μF

  • Accuracy: ±10% + 10 nF

Filtered Resistance Test Modes

  • Selectable durations: 10 s, 20 s, 30 s, 40 s

Timing Test Function

  • Range: 1 – 99,999 seconds

Power Supply

  • AC Input: 220 V ±10%, 50/60 Hz, 20 VA

  • Battery: 16.8 V Lithium-ion rechargeable battery

  • Battery Life:

    • Up to 6 hours @ 10 kV / 100 MΩ load

    • Approximately 4 hours continuous field use

Safety & Environmental Compliance

Specification Value
Safety Standard IEC 61010-1 CAT IV 600 V
EMC Compliance IEC 61326-1
Electrostatic Immunity IEC 61000-4-2
Electromagnetic Immunity IEC 61000-4-3
Ingress Protection IP65 (lid closed)

Physical Specifications

Parameter Value
Dimensions 32 cm × 28 cm × 13 cm
Weight Approx. 3.8 kg (8.4 lbs)

Application

  • High-voltage cable fault detection and diagnostics

  • Transformer & switchgear insulation assessment

  • Field testing of motors, generators, and capacitors

  • Industrial maintenance and commissioning

Included Accessories

  • 2 High-voltage test leads

  • 1 GUARD terminal lead

  • USB data cable

  • AC power adapter

  • Durable carrying case

  • Instruction manual

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