High-Voltage Digital Insulation Resistance Tester – 250V to 2500V, 1MΩ to 200GΩ
Professional high-voltage insulation resistance tester (megohmmeter) designed for testing transformers, motors, generators, power cables, and electrical equipment. Supports selectable test voltages up to 2500V, a wide resistance range to 200GΩ, automatic discharge, and a clear digital display for safe, accurate diagnostics.
This digital insulation resistance tester is a specialised electrical instrument used to assess the condition and safety of insulation in industrial, commercial, and utility-grade electrical systems. It is ideal for preventive maintenance, commissioning, fault diagnosis, and compliance testing.
With a measurement range from 1MΩ up to 200GΩ, the tester is suitable for evaluating insulation on large transformers, generators, high-voltage motors, power capacitors, cables, switchgear, and surge arresters. The unit supports selectable high test voltages (250V, 500V, 1000V, 2000V, and 2500V), enabling accurate testing across a wide variety of equipment ratings.
An automatic discharge function safely releases residual voltage after testing, reducing risk to the operator and connected equipment. The high-visibility digital display with bar graph provides fast interpretation of results, even in challenging field conditions. Battery operation ensures portability for use in substations, plant rooms, workshops, and remote locations.
Key Features
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Insulation resistance measurement from 1MΩ to 200GΩ
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Selectable test voltages: 250V / 500V / 1000V / 2000V / 2500V
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Automatic discharge of test voltage after measurement
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Digital display with 2000-count resolution and bar graph
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High-voltage warning indication
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Low battery voltage indication
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Battery-powered, portable operation
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Designed for professional electrical testing and maintenance
Typical Applications
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Power transformers and generators
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High-voltage electric motors
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Power and control cables
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Switchgear and electrical panels
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Surge arresters and capacitors
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Electrical maintenance and commissioning
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Industrial and utility inspections