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IRT.5B Portable 5kV Insulation Resistance Tester

The IRT.5B is a compact, high-performance 5kV insulation resistance tester, designed for field and lab testing of electrical systems requiring high insulation integrity. Supporting five voltage ranges from 250 V to 5000 V, it provides reliable testing up to 2 TΩ of resistance.

With digital data display, USB data logging, and built-in DAR/PI analysis, the IRT.5B offers excellent versatility and convenience for maintenance, commissioning, and troubleshooting of low- and medium-voltage equipment.

Housed in a rugged IP65 case (with closed lid), the tester withstands harsh environments, making it an ideal choice for field professionals.

Key Features

  • 5 test voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V

  • Insulation resistance testing up to 2 TΩ

  • Digital LCD with real-time V/I curve display

  • Automatic DAR & PI measurement

  • Ramp testing mode (step-up voltage in 10% increments)

  • Filtered resistance test (selectable duration)

  • Measures leakage current and capacitance

  • USB data export with internal memory (up to 1000 test groups)

  • Digital filtering to reduce environmental noise

  • Automatic discharge after test

  • Dual power options: AC or lithium battery operation

Technical Specifications

Parameter Specification
Test Voltages 250 V, 500 V, 1,000 V, 2,500 V, 5,000 V
Max Insulation Resistance 2 TΩ
Short-Circuit Current 5 mA
Voltage Accuracy 100% – 110% of nominal value
Voltage Measurement Accuracy ±5% + 3 V
Current Measurement Precision ±5% + 0.2 nA
Filtered Resistance Test 10 s, 20 s, 30 s, 40 s
Timing Test Range 1 – 99,999 s
Capacitance Range 0 – 99.99 μF
Capacitance Accuracy ±10% + 10 nF
Insulation Resistance Resolution 0.01 mΩ

Power & Battery

Specification Details
AC Input Power 220 V ±10%, 50/60 Hz, 20 VA
Battery 16.8 V Lithium-ion rechargeable battery
Battery Life Up to 6 hours @ 5 kV / 100 MΩ

Environmental & Safety Standards

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

Physical Characteristics

Parameter Specification
Dimensions 32 cm × 28 cm × 13 cm
Weight 3.8 kg (Approx. 8.4 lb)

Application

  • Testing insulation in motors, cables, switchgear, generators, and transformers

  • Routine maintenance, commissioning, and compliance checks

  • Polarization index and dielectric absorption ratio evaluation

  • Electrical safety assurance in industrial and utility settings

Included Accessories

  • 2 high-voltage test leads

  • 1 GUARD terminal lead

  • AC power adapter

  • USB data cable

  • Carrying case

  • User manual

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