UVI-41 Handheld UV Imager for HV Corona & Partial Discharge Detection

Core Test Scenarios

· Transmission & Distribution Lines: Corona discharge detection for overhead lines, broken strands, poor connections, damaged insulators, and improper grading ring installation

· Substation Equipment: Corona and partial discharge inspection for GIS, SF6 circuit breakers, transformers, CT/PT, bushings, disconnectors, and busbars

· Insulators & Arresters: Surface discharge detection for contaminated, cracked, or damaged porcelain/composite insulators, and faulty surge arresters

· Rotating Machinery: Stator winding corona and partial discharge inspection for HV generators and motors in power plants and industrial facilities

· Railway Traction Systems: Discharge detection for catenary lines, traction power supply equipment, and HV switchgear in metro and high-speed railway systems

· New Energy Projects: HV equipment inspection for wind farms, solar photovoltaic plants, and energy storage systems

Industry-Specific Usage

· Electric Power Utilities: Routine patrol inspection, preventive maintenance, and emergency fault diagnosis for transmission and distribution assets

· Electrical Equipment Manufacturers: Factory outgoing inspection, type testing, and quality control for HV switchgear, transformers, and insulators

· Industrial & Petrochemical: HV electrical system maintenance for high-reliability production facilities and hazardous area electrical equipment

· Rail Transit & Urban Infrastructure: Traction power supply system inspection for metro, high-speed railway, and urban power grid projects

· Third-Party Testing & Certification: Compliance testing, performance verification, and arbitration testing for electrical engineering projects

True 24/7 All-Weather Solar-Blind Detection

Unlike standard UV cameras that suffer from sunlight interference, the GDUVI-41’s 240–280nm full solar-blind design completely blocks solar UV radiation. It delivers stable, clear corona imaging even in direct bright daylight, enabling round-the-clock inspection without time or weather limitations.

Industry-Leading Ultra-High Sensitivity

With 2.2×10⁻¹⁸ W/cm² ultra-high sensitivity and 1pC@15m discharge detection capability, the GDUVI-41 captures extremely weak corona signals from early-stage insulation defects. This enables predictive maintenance, allowing users to address potential faults before they escalate into catastrophic equipment failures and unplanned outages.

Precise Fault Localization with Dual-Spectrum Fusion

<1mrad UV/visible overlay accuracy ensures discharge sources are precisely located on the target equipment. Operators can see exactly where the discharge occurs, eliminating guesswork and enabling targeted, efficient repairs, which drastically reduces on-site maintenance time and costs.

Non-Contact, Live-Line Safe Operation

Non-invasive, non-destructive testing technology enables inspection of energized HV equipment from a safe distance, with no need for power outages or equipment disassembly. This ensures uninterrupted power supply and maximum operator safety during inspection.

Quantitative Discharge Severity Assessment

Real-time photon counting and built-in 3-level severity classification provide objective, data-driven assessment of discharge intensity. Even non-specialist operators can quickly judge equipment insulation status and prioritize maintenance tasks, greatly reducing the technical threshold for on-site inspection.

Field-Proven Ruggedness & Reliability

IP54-rated rugged housing, wide operating temperature range, and industrial-grade components ensure stable performance in harsh outdoor environments with high dust, high humidity, and strong electromagnetic interference. Long-life zero-attenuation UV detector delivers low maintenance costs and excellent total cost of ownership.

Q: What is "full solar-blind" technology, and why is it important?

A: Full solar-blind technology refers to the detector’s exclusive sensitivity to the 240–280nm UV band, which is completely absorbed by the Earth’s ozone layer and does not reach the ground. This eliminates all interference from sunlight, enabling reliable corona detection even in direct bright daylight, 24 hours a day, 7 days a week.

Q: What types of faults can the UVI-41 detect?

A: It accurately detects corona discharge, surface arcing, and partial discharge caused by various insulation defects, including: contaminated/damaged insulators, broken conductor strands, poor connections, improper grading ring installation, internal defects in GIS/switchgear, and winding insulation degradation in generators/motors.

Q: What is the minimum discharge sensitivity of the UVI-41?

A: The minimum discharge sensitivity is 1pC @ 15m, with an ultra-high UV sensitivity of 2.2×10⁻¹⁸ W/cm², enabling it to capture extremely weak early-stage discharge signals invisible to other detection methods.

Q: Can it accurately locate the discharge source?

A: Yes. It features a dual optical path design with <1mrad UV/visible overlay accuracy, precisely overlaying the UV discharge signal on the visible light image of the target equipment, allowing operators to pinpoint the exact location of the fault.

Q: Is it suitable for daytime outdoor inspection?

A: Absolutely. Its full solar-blind design completely filters out all solar UV interference, delivering stable, reliable detection performance even in direct strong sunlight, with no false positives or missed detections.

Q: How is test data stored and exported?

A: The system has a built-in 16GB TF card, storing high-resolution images and videos with automatic timestamp and parameter overlay. Data can be exported via Mini USB for compliance documentation, maintenance reporting, and fault analysis.

Q: How long is the battery life?

A: The built-in rechargeable lithium battery pack supports 3 hours of continuous operation on a single full charge, with an intelligent power-saving mode that extends battery life for all-day on-site inspection.

Q: What international standards does the UVI-41 comply with?

A: It is fully designed and tested in accordance with IEC 61730, IEEE 1312, and DL/T 417 international and domestic standards for HV equipment UV inspection, with globally recognized test results.

Q: What is the warranty and after-sales support?

A: We provide a standard 1-year whole-machine warranty, lifetime technical support, professional calibration services, and on-site operation training through our global authorized service network. Extended warranty plans are available upon request.