Online PD Coupler

Protection against partial discharges and losses in power transformers

Essential in asset management, HVEX's PD Coupler is an advanced solution for power transformer monitoring, designed to detect and assess faults in high-voltage bushings and windings. Its performs online measurements of partial discharges, capacitance, and dissipation factor in condenser bushings, providing information about insulation status and facilitating preventive maintenance management, thus avoiding forced interruptions. Keywords: Partial discharge meter, capacitive bushing tap, partial discharge monitoring, partial discharges in transformers. Standards: IEC 60270

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Protection against partial discharges and losses in power transformers

Technical Information

Applicable bushing model
ABB GOB; Trench, TSEA, RIP, GOE, BSP and others (Check compatibility)
Voltage Reading
-20 V to +20 V
Operating frequency for leakage current reading
2 MHz (point of 3 dB)
Simultaneous channels
4 (3 couplers + 1 leakage current)
Minimum storage
128 GB
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Optimize asset management with HVEX online monitoring

Power transformers are among the most important assets in the transmission and distribution networks of electrical energy. Failures in transformers are usually catastrophic and cause irreversible internal damage, as they often occur in the insulation systems of coils and bushings. The Online PD Coupler provides accurate information about the integrity of the insulation to maintenance and asset management teams, capable of measuring online partial discharges of high-voltage windings, capacitance, and dissipation factor (tan δ) of the condenser bushings of power transformers.

Optimize asset management with HVEX online monitoring
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Enjoy the benefits of Shield-X

  • Free Platform

    Maintain an event history and receive real-time alerts to ensure efficient operations with Shield-X.

  • Quick fault detection

    Stay ahead of faults with fault identification through trip current overreach or di/dt variation.

  • Fast restoration

    Keep your operations flowing efficiently and minimize impacts on circuit faults.

  • Immediate alerts

    The system identifies faults and sends real-time alerts instantly, through operational logic.

Various communication modalities

It has several communication options to provide stability and speed in data transmission. The user can change the communication mode by simply disconnecting the communication board from its terminals and replacing it with one that supports the desired communication technology.

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