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TEST LABS

Partial Discharges (PD) And Radio Influence Voltage (RIV) Measurement System

The HVEX Partial Discharge (PD) and Radio Interference Voltage (RIV) Measurement System is a complete solution for early diagnosis and monitoring of the dielectric condition of high and extra-high voltage electrical assets. Utilizing cutting-edge technology, the system employs high-frequency sensors and dedicated software for non-invasive detection of dielectric faults in transformers, reactors, circuit breakers, capacitors, cables, and generators. Manufactured in Brazil by HVEX, the system can be fully customized according to the client's needs, serving applications from laboratory settings to field tests in substations and industrial plants. Using oil or epoxy insulated coupling capacitors, the equipment operates with phase voltages ranging from 13.8 kV up to 500 kV, offering high versatility for both indoor and outdoor environments. Typical Applications: • Partial discharge (PD) measurement in transformers, reactors, and circuit breakers. • Radio interference voltage (RIV) testing on high-voltage lines and equipment. • Preventive diagnosis of dielectric faults in insulating materials. • Condition monitoring of generators, power cables, and capacitors. • Early detection of dielectric withstand degradation. • Applications in substations, factories, and electrical testing laboratories. Technical Features: • High-frequency measurement with dedicated analysis software. • Coupling quadripole for signal separation. • PRPD (Phase Resolved Partial Discharge) pattern technique for mapping the dispersion of discharges over the sine wave cycle. • Precise indication of the type and origin of the dielectric fault. • Digital communication and detailed analysis reports. Standards Complied With: • IEC 60270 – Partial discharge measurements. • IEC 60060 – High-voltage test techniques. • IEEE Std C57.124 – Recommended practices for partial discharge measurements in transformers. • IEEE Std C57.113 – Guide for interpreting PD measurements. • IEEE Std 1434 – Partial discharge measurement in rotating electrical machines. • IEEE Std 400 – PD testing on electrical cables. • NBR 5356 – High-voltage testing for electrical equipment. Technical Advantages: • Early diagnosis of critical dielectric faults. • Non-invasive and safe equipment for field and laboratory operation. • National customization with dedicated HVEX technical support. • High reliability for applications from 13.8 kV to 500 kV. • Ideal or predictive maintenance programs and operational risk reduction.

Technical Information

Equipment tested voltage
13.8kV to 500kV
Connections
Coaxial cable and Wireless
Communication protocol
TCP/IP, Modbus
Method for partial discharge detection
Electrical (Capacitive)
Radio interference voltage measurement range
100 μV to 2,000mV

Dielectric Evaluation

Electricity handling relies on the conductive and dielectric capabilities of materials. Dielectric materials have relative insulation and can be breached by high voltages or prolonged periods of time or aging, leading to partial discharges that stress the material. The PD sensor assesses the presence and severity of these discharges by connecting to a transformer bushing via a capacitive coupler or adapting to other equipment. HVEX utilizes the capacitive electrical method to measure partial discharges, filtering and treating discrete pulses to provide results on the severity of partial discharges. Meanwhile, radio interference voltage (RIV) testing verifies whether the equipment operates without distortions in environments exposed to electromagnetic fields, evaluating the response signal by an oscilloscope after passing through filters and dividers. The PD-RIV HVEX Sensor is the ideal choice for accurate and reliable assessment of partial discharges and radio frequency interference voltage (RIV), ensuring safety and efficiency across various applications

HVEX | Dielectric Evaluation
HVEX | Benefits and Usability

Benefits and Usability

  • HVEX | Accurate Assessment
    Accurate Assessment

    Provides an accurate and reliable assessment of partial discharges (PDs) and radio frequency interference voltage (RIV) in electrical assets, ensuring the safety and integrity of equipment

  • HVEX | Wide Applicability
    Wide Applicability

    With the capability to assess generators, transformers, high-voltage conductors, reactors, circuit breakers, and capacitors, HVEX addresses a variety of needs in electrical systems

  • HVEX | Brazilian manufacturing
    Brazilian manufacturing

    HVEX stands out as the only Brazilian manufacturer of this equipment, ensuring quality, supply, and localized support for customers

  • HVEX | Early Detection
    Early Detection

    Using a non-invasive electrical method, it allows for early detection of potential dielectric failures in assets, enabling corrective actions to be taken in advance

Exclusive Features

  • HVEX | ImageOperational Flexibility
  • HVEX | ImageWide Application
  • HVEX | ImageNational Manufacturing
  • HVEX | ImagePrecision and Versatility

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