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TEST LABS

Repetitive Impulse Generator

The HVEX Impulse Generator represents the state of the art in high-voltage testing, custom-designed to precisely meet the requirements for dielectric withstand tests against lightning impulse and switching impulse surges. Its advanced technology allows for the validation of various electrical equipment performance under high-energy transients, ensuring safety and reliability for electrical power systems. Featuring a powerful data acquisition system, the HVEX impulse generator is equipped with 12-bit and 16-bit digitizers, operating at 2.5 Giga samples per second (2.5 GSa/s). This ensures extremely high temporal resolution and accuracy in capturing impulse waveforms. Its optically-isolated control system guarantees operational safety and immunity to interference during testing. Operation is managed through intuitive, Windows-compatible software, enabling easy configuration of test parameters, result storage, and automatic calculation of the oscillation coefficient, fully meeting international normative requirements. Key Applications: Lightning impulse tests on power transformers Switching impulse tests on high-voltage equipment Testing of surge arresters and spark gaps Dielectric withstand tests on insulators, cables, and substation equipment Validation of lightning protection systems Standards Complied With: IEC 60060-1 – High-voltage test techniques: General requirements IEC 60060-2 – High-voltage test techniques: Impulse measuring systems NBR 5356-1 – Electrical tests on high-voltage equipment IEC 60076-11 – Transformers: Special dielectric tests IEEE Std C57.12.01 – Tests for power transformers Technical Benefits: Precision and stability in impulse testing Ultra-high-speed and high-resolution data acquisition Secure control with optical isolation Easy-to-operate software, with automatic result analysis Modular, robust, and safe design for laboratory or field use

Technical Information

Front resistor
300 Ω with taps at 30 Ω and every 45 Ω
Tail resistor
10, 50, 70, 115, 500, 300, 400, 500, and 600 Ω
Voltage class of the High Voltage Source
70 kV in HV and 220 V in LV
Divider voltage
100 kV in HV and 40 V in LV
Voltage class of the diode
100 kV (DC)

Confidential Evaluation of Electrical Equipment

HVEX Portable Impulse Generator is an essential element for evaluating the withstandability of electrical equipment to dielectric stresses caused by atmospheric and switching voltage surges in the electrical system. As the only national manufacturer, our generators are designed according to the needs of each customer, complying with IEC 60060, NBR 61083, NBR 6939, NBR 5356, and NBR 5440 standards. They can be applied to transformers, isolators, cables, circuit breakers, capacitors, lightning arresters, SPDs, surge protectors, among others.

HVEX | Confidential Evaluation of Electrical Equipment
HVEX | Benefits and Usability

Benefits and Usability

  • HVEX | Customized Test Modules
    Customized Test Modules

    Includes variable source, elevator, rectifier diode, automatic grounding system, and more.

  • HVEX | Automated Security
    Automated Security

    Remote functions, audible alarms, protection relays, and automatic grounding ensure operator safety.

  • HVEX | Waveform Adjustment
    Waveform Adjustment

    Resistor for waveform adjustment (front and tail) and resistive divider for voltage measurement.

  • HVEX | Custom Grounding Design
    Custom Grounding Design

    Adapted according to the customer's installation.

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Enjoy the benefits of LIAS

  • Data storage

    With the solutions, it is possible to have a database and all the records of tests performed for later queries.

  • Complete analysis

    Automatically analyzes front times, half-wave, maximum value, oscillation coefficient, residual voltage, and maximum current.

  • Automatic reports

    Through HVEX LIAS, it is also possible to automatically generate custom technical reports in .pdf and .doc formats.

  • Specialized support

    Have unlimited access to national software support, in addition to constant platform updates.

Exclusive Features

  • HVEX | ImageGuaranteed portability
  • HVEX | ImageHigh robustness
  • HVEX | ImageHigh accuracy
  • HVEX | ImageEmbedded automation

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