The UE Systems Si2-PD Acoustic Imaging Camera is an advanced non-destructive diagnostic instrument specifically engineered for the detection, visualization, and automated classification of partial discharge (PD) faults in medium- and high-voltage electrical equipment.

Incipient electrical discharge phenomena—such as corona discharges, surface tracking, and micro-arcing—generate distinct high-frequency ultrasonic pressure waves long before they escalate into catastrophic phase-to-ground flashovers, equipment destruction, or severe arc flash incidents. The Si2-PD captures these acoustic signatures and translates them into vivid color sound heatmaps overlaid in real time onto a high-definition digital video feed, enabling reliability engineers and utility technicians to detect and pinpoint electrical insulation breakdown in daylight from safe distances up to 200 meters.

Key Engineering Features & Operational Advantages:
- 124 High-Sensitivity Digital MEMS Microphones: Arranged in an optimized circular spiral array to maximize directional acoustic gain and suppress ambient environmental clutter (such as highway traffic, wind noise, and substation transformer hum). The array captures weak acoustic transients from minute discharge sites that infrared thermal cameras and visual inspections miss completely.
- Ultra-Wide 2 kHz to 130 kHz Frequency Range: Delivers full-spectrum acoustic coverage spanning from audible sound into high ultrasonic domains. This broad dynamic range is essential for isolating distinct discharge frequency signatures from background mechanical noise.
- On-Device AI Partial Discharge Classification: Features embedded artificial intelligence algorithms that analyze the frequency and pulse characteristics of the detected discharge directly on the device. It automatically categorizes the anomaly (Corona, Surface Tracking, Arcing, or Floating Discharge), assigns a standardized severity score, and displays immediate maintenance recommendations on-screen without requiring external computer processing.
- 12 Megapixel Visual Camera with 8x Digital Zoom: Delivers clear optical imagery, allowing inspectors to zoom in smoothly on high-voltage transmission towers, overhead insulators, transformer bushings, and substation structures from ground level.
- 5-Inch Full HD Sunlight-Readable Touchscreen: Offers 1280 x 720 pixel resolution with 1000-nit luminance, providing visibility under intense direct sunlight. A 60 fps acoustic frame rate ensures smooth real-time scanning during drive-by or walk-through inspections.
- Rugged IP54 Industrial Ergonomics: Weighs approximately 1.0 kg (2.2 lbs) with an ergonomically balanced one-handed grip. Enclosed in an IP54-rated housing resistant to dust ingress and omnidirectional water splashing, ensuring dependable performance during outdoor field surveys.
- Cloud Integration & Automated Reporting: Equipped with dual-band Wi-Fi and 128 GB of internal storage, enabling instantaneous synchronization with cloud analysis platforms and rapid generation of professional inspection reports.

Typical Industrial Applications:
- Condition assessment of medium- and high-voltage electrical substations (11kV, 22kV, 110kV, 220kV, 500kV).
- Detecting internal tracking and partial discharge in metal-clad medium-voltage switchgear cabinets and ring main units (RMU).
- Inspecting high-voltage insulators, outdoor disconnect switches, busbars, and power transformer bushings.
- Testing high-voltage cable terminations, splice joints, and generator stator winding insulation integrity.

• Manufacturer/Distributor: UE Systems
• Country of Origin: USA
• Product Series: Si2 Series Acoustic Imaging Cameras
• Model Designation: Si2-PD
• Acoustic Sensor Array: 124 low-noise digital MEMS microphones
• Frequency Bandwidth: 2 kHz to 130 kHz (user-adjustable filtering)
• Detection Stand-Off Distance: 0.3 m to 200 m (1 ft to 656 ft)
• Visual Camera Resolution: 12 Megapixels color camera with autofocus
• Digital Zoom: 1x to 8x smooth digital zoom
• Acoustic Frame Rate: Up to 60 fps
• Field of View (FOV): 75° x 55°
• Display Screen: 5-inch capacitive color touchscreen (1280 x 720 pixels), 1000 cd/m² sunlight-readable
• On-Device Partial Discharge Analytics:
  - Automated PD classification: Corona, Surface Tracking, Arcing, Floating Discharge
  - Real-time fault severity rating
  - Contextual repair recommendations displayed on-screen
• On-Board Memory: Integrated 128 GB eMMC internal storage (stores thousands of images and video recordings)
• File Formats: Standard JPEG with embedded acoustic metadata; MP4 video files
• Data Connectivity: Dual-band Wi-Fi (2.4 GHz / 5 GHz) for cloud synchronization, plus USB Type-C interface
• Analysis Software: Compatible with cloud analytics and desktop automated reporting platforms
• Power Source: High-capacity rechargeable Li-Ion battery pack (field-swappable)
• Continuous Operating Time: Approx. 2.5 hours per battery (dual-battery kit included)
• Ingress Protection Rating: IP54 (dust and water splash protection)
• Operating Temperature Range: -10°C to 50°C (14°F to 122°F)
• Dimensions: Approx. 286 x 140 x 128 mm
• Unit Weight: Approximately 1.0 kg (2.2 lbs) including battery pack.