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GTB/HV Series AC/DC Hi-Pot Tester

The GTB/HV Series are lightweight AC/DC high-voltage hipot testers designed for insulation performance testing of electrical equipment in power systems.
Built with advanced epoxy-resin encapsulated transformers and CD-type iron cores, the GTB/HV Series offers higher insulation strength, reduced weight, excellent anti-humidity performance, and improved reliability compared to traditional oil-immersed transformers.
These units are optimized for site testing, providing stable performance, easy transportation, and long operational life for both AC withstand and DC leakage current testing.

Model Options

Voltage Output Required

Key Features

  • Advanced epoxy-resin insulated transformers – lighter & more durable than oil-filled units

  • CD-type iron core for reduced weight & improved efficiency

  • Built for site operation – compact, rugged, easy to transport

  • Suitable for AC & DC voltage withstand tests

  • Ideal for insulation testing of electrical equipment in power systems

  • High reliability in high-humidity environments

  • Stable performance for long-duration operation

  • Recommended for: switchgear, cables, transformers, capacitors, motors, insulators, and more

Technical Specifications

General Specifications

  • Impedance voltage: 4.5%–8%

  • Surface temperature rise: Sine wave

  • Idle load loss: 0.2%–0.35%

  • Continuous operation: 2 hours

  • Interrupted operation: Continuous

  • AC/DC Output: All models available in AC-only or AC+DC configurations

Model-Specific Specifications

Model Capacity (kVA) Input Voltage (V) AC Output Voltage (kV) Output Current (mA) DC Output Voltage (kV) Dimensions (mm) Weight (kg)
GTB-3/50 3 200 (400) 50 kV 60 mA 50 kV 310×250×570 30
GTB-5/50 5 100 50 kV 60 mA 50 kV 300×310×680 46
GTB-10/50 10 200 50 kV 60 mA 50 kV 320×350×720 73
GTB-20/50 20 400 50 kV 60 mA 50 kV 360×350×720 85
GTB-30/50 30 600 50 kV 60 mA 50 kV 500×380×780 120
GTB-5/100 5 — 100 kV 50 mA 100 kV 360×350×960 80
GTB-10/100 10 100 100 kV 50 mA 100 kV 360×350×960 80
GTB-20/100 20 200 100 kV 50 mA 100 kV 500×380×880 120
GTB-30/100 30 300 100 kV 50 mA 100 kV 580×380×880 160
GTB-50/100 50 500 100 kV 50 mA 100 kV 650×460×1010 230
GTB-20/150 20 — 150 kV 300 mA 150 kV 750×465×1010 265
GTB-30/150 30 500 150 kV 300 mA 150 kV 750×465×1010 290

Note: When ordering, specify AC-only or AC + DC, and the voltage/kVA rating required.

Standard Accessories

  • High-voltage output cable

  • Earth cable

  • Power supply cable

  • User manual

  • Calibration certificate

  • Protective carry case (model dependent)

Applications

  • AC withstand voltage testing

  • DC leakage current and DC withstand testing

  • Insulation strength verification of:

    • Power cables

    • Transformers

    • Switchgear

    • Generators & motors

    • Capacitors & insulators

  • On-site commissioning and preventive maintenance

Optional Add-Ons

  • Extended HV output cables

  • External safety interlock switch

  • HV probe set

  • Warning lamp/tower kit

  • Rugged hard transport case

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