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Partial discharges (PD) are minor, localized dielectric breakdowns of insulation in high-voltage systems. These discharges do not completely bridge the electrodes, causing insulation to deteriorate over time and ultimately leading to complete asset failures. As a result, utility engineers, OEMs, and technicians utilize PD sensors to detect partial discharges in real-time across electrical assets, including transformers, switchgear, rotating machines, power cables, and circuit breakers.
Depending on the detection mode, PD sensors are designed for various applications and insulation types. Each of these sensors has different sensitivities, equipment accessibility, and noise environments.
When a PD event occurs, which usually lasts only a few nanoseconds, it emits a specific type of wave or pulse. Rugged Monitoring’s PD sensors installed near defect sites convert these physical signals into electrical signals for real-time analysis. During signal conditioning and processing, PD sensors use bandpass filters and amplifiers to eliminate noise, detect weak signals, and retain only the relevant frequency bands. To further isolate and locate the PD source, our PD sensors send analog signals to PD monitors to digitize the waveforms. This real-time capture of analog signals with sensors enables the detection of PD inception, discharge magnitude, and repetition rate.
Rugged Monitoring offers a wide range of PD sensors designed for continuous monitoring of different PD mechanisms:
Rugged Monitoring’s PD sensors offer a wide frequency range (up to 2000 MHz), enabling reliable detection of partial discharge signals. Suitable for both online and offline measurements, our robustly engineered PD sensors enable early fault detection even in extreme and high-voltage environments (IP65-rated). Our sensors also offer superior diagnostic resolution and predictive value.
With easy installation and customizable options across diverse asset applications, Rugged Monitoring’s PD sensors enable accurate and reliable condition monitoring of PD activity.
USENS-T is our advanced Ultra High Frequency (UHF) PD sensor designed to detect and monitor PD activity inside oil-filled transformers. With a wide frequency range of 200–2000 MHz, the USENS-T enables reliable detection of partial discharge signals, making it an ideal solution for cost-effective PD monitoring and improved ROI.
The USENS-V is a cutting-edge Ultra-High-Frequency (UHF) PD sensor designed to detect and accurately monitor PD activity within transformers and oil-filled reactors. It can identify even the smallest PD signals with high sensitivity, ensuring early fault detection and improved transformer reliability.
USENS-G is our Ultra-High-Frequency (UHF) PD sensor that can detect the smallest UHF frequencies emitted during PD activity. This sensor is suitable for all types of GIS and is easily installed on the GIS flange. The IP65-rated ingress protection ensures suitable monitoring even in outdoor installations. The wide band (200-3000 MHz) frequency response and high sensitivity (up to -90dBm) enable low-cost PD monitoring and higher ROI.
The USENS-BT is a rugged Partial Discharge (PD) sensor designed for installation on transformer bushing trunks. It offers precise detection of Ultra High-Frequency (UHF) PD signals, ensuring comprehensive and accurate monitoring of insulation health. Built for performance in harsh environments, the IP65-rated sensor features integrated transient overvoltage protection to minimize electrical transients, improving reliability and extending its lifespan.
The USENS-B is a compact, high-dielectric, and highly sensitive Ultra-High Frequency (UHF) PD sensor designed for both temporary and permanent monitoring of Gas-Insulated Switchgear (GIS). It precisely detects even the smallest PD signals, ensuring superior reliability and accuracy. With its robust construction, USENS-B is ideal for installation in GIS barrier openings, busbars, and terminal boxes, offering wide frequency response and maximum GIS coverage even in the most demanding environments.
USENS-C is an advanced Ultra High Frequency (UHF) Partial Discharge (PD) sensor that delivers precise and reliable PD detection for cable terminations, joints, and cable sheath. Engineered for durability and safety, it features an IP65-rated enclosure that ensures robust performance in indoor and outdoor environments, even in harsh environments. It incorporates integrated transient overvoltage protection, safeguarding the sensor and connected PD monitoring systems for unexpected electrical surges, enhancing system reliability and longevity.
The ASENS acoustic sensor is designed to detect and localize Partial Discharge (PD) activity in electrical assets using cutting-edge acoustic emission technology. By accurately analyzing the amplitude and phase delay of acoustic waves, the ASENS system enables the precise localization of PD sources, thereby enhancing diagnostic accuracy. The strategic placement of sensors on the asset’s surface allows real-time monitoring and fault triangulation, ensuring the timely identification of insulation defects.
HSENS-H is a state-of-the-art High Frequency Current Transformer (HFCT) PD sensor engineered to deliver accurate Partial Discharge (PD) measurements. Its split-core design ensures easy installation, allowing it to be clamped around the earth shield, cable insulation, or looped back to cable shields based on the termination conditions. Built with an IP65-rated enclosure, it is highly durable and compatible with extreme environments. It is ideal for both online and offline PD testing, offering flexibility for diverse monitoring requirements.
HSENS-T is an advanced Transient Earth Voltage (TEV) PD sensor engineered to detect local and high-frequency PD pulses in metal-clad switchgear, power cable termination boxes, rotating machines, and power transformers. Combined with a High-Frequency Current Transformer (HFCT), it enhances PD diagnostics by distinguishing between internal and external partial discharge activities. The HSENS-T enables the detection of transient earth voltages (TEV) or capacitively coupled signals from metal surfaces, delivering vital insights without disrupting operations.
HSENS-CC is a compact capacitive coupler sensor designed for accurate and efficient Partial Discharge (PD) detection and monitoring. Designed to meet the needs of modern electrical systems, this sensor is suitable for a wide range of applications, including motors, switchgear, and transformers. Built with high dielectric materials, the HSENS-CC is ideal for both temporary and permanent installations, particularly in challenging environments like busbars and terminal boxes with limited space.
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