Your Professional Partial Discharge Sensor Supplier
Founded in 1992 and formally incorporated as Wuhan Moen Intelligent Electrical Co., Ltd. on November 12, 2012, with a registered capital of RMB 36 million, we are a professional technology company specializing in the research, development, and production of high-voltage test equipment. Our 8,000 m² facility in Wuhan East Lake High-Tech Development Zone houses dedicated production lines, R&D centers, and administrative facilities. With an experienced technical and production team, Moen focuses on core products including test transformers, series resonance systems, and other high-voltage testing equipment. Backed by years of industry experience, the company is committed to reliable manufacturing, continuous technical improvement, and providing practical solutions for global power utility and industrial customers.
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![Intelligent Outdoor PD Sensor]()
Intelligent Outdoor PD SensorOptimized for outdoor ring main units with enhanced anti-vibration and anti-corrosion.Built-in intelligent algorithm reduces false alarm rate by 30% compared to basic models.Hot-swappable daisy-chain -
![TEV+AA Magnetic Daisy-Chain PD Sensor]()
TEV+AA Magnetic Daisy-Chain PD SensorTool-free magnetic installation enables 10-second live deployment without power shutdown.Single Ethernet cable handles both power and data transmission for simplified wiring.Supports up to 32 sensors -
![UHF 300-1500MHz GIS PD Sensor]()
UHF 300-1500MHz GIS PD Sensor300MHz-1500MHz UHF detection completely avoids low-frequency electromagnetic interference.Butterfly antenna design delivers ≥+5dBi gain for high-sensitivity signal capture.IP67 waterproof housing -
![3-in-1 Multi-Channel PD Sensor]()
3-in-1 Multi-Channel PD SensorIntegrates UHF, TEV and AA detection technologies for multi-dimensional signal coverage.Synchronous multi-channel acquisition with cross-validation reduces false alarm rates.Compact magnetic design -
![TEV Disc Magnetic PD Sensor]()
TEV Disc Magnetic PD SensorAdopts capacitive voltage divider principle for accurate transient earth voltage detection.Disc-shaped magnetic mount offers flexible layout on any switchgear surface.Cost-effective and reliable -
![TEV-AA 2-in-1 Dual PD Sensor]()
TEV-AA 2-in-1 Dual PD SensorCombines TEV internal discharge detection and AA surface discharge detection.Dual-channel complementary verification improves fault diagnosis accuracy by 40%.Square magnetic design fits perfectly on -
![HFCT Split-Core Cable PD Sensor]()
HFCT Split-Core Cable PD SensorBased on Rogowski coil principle for non-intrusive installation on grounding lines.Split-core ring structure allows installation without disconnecting the grounding line.IP68 protection and 96-hour -
![AA Air Ultrasonic PD Sensor]()
AA Air Ultrasonic PD SensorHigh-sensitivity 40KHz probe accurately captures insulation surface discharge signals.Omnidirectional universal bracket enables 360° adjustable detection angles.Metal shielded housing provides
Why choose us
Our Certificate
We are certified in ISO 9001 (Quality), ISO 45001 (Health & Safety), and ISO 14001 (Environment), ensuring high standards in all aspects of our operations.
Strong R&D Capability
Committed to technological breakthroughs, including investments to develop 750kV reactor solutions.
Experienced Technical Team
A growing team of 61 employees supporting product development, production, and customer service.
Complete Pre & After-Sales Service
From solution design and technical support to installation, maintenance, and fast response service.
The Smart 3-in-1 Sensor integrates three detection technologies: Ultrasonic (AA), Transient Earth Voltage (TEV), and Temperature & Humidity. It is widely used in substations, switching stations, and other electrical environments to monitor partial discharge and ambient temperature/humidity in ring main units (RMUs) and switchgear. This device enables early detection of potential insulation defects and provides critical support for the safe and stable operation of electrical equipment.
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Detection Type |
Parameter |
Value |
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UHF |
Frequency Range |
300MHz-1500MHz |
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TEV |
Bandwidth |
3MHz-100MHz |
|
AA |
Center Frequency |
40KHz |
|
Installation |
Magnetic (Equipment Inner Surface) |
|
|
Operating Temperature |
-40℃~+85℃ |
|
|
Interface |
BNC (SMA customizable) |
|
|
Housing Material |
Metal |
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Features of 3-in-1 Multi-Channel PD Sensor
The sensor combines TEV, AA, and temperature/humidity measurement into a single unit. It simultaneously collects electrical signals, mechanical vibration data, and environmental conditions. The multi-dimensional data enables comprehensive and accurate assessment of partial discharge activity and insulation health.
Equipped with advanced filtering, shielding, and noise suppression technologies, the sensor can operate reliably in complex electromagnetic environments commonly found in power systems.
Built-in smart algorithms and data analysis modules enable real-time processing of collected data. The sensor can automatically identify patterns and characteristics of partial discharge. Based on preset thresholds and rules, it performs fault diagnosis and generates early warnings, helping to prevent insulation failures.
Typically mounted using magnetic or other quick installation methods, the sensor requires no major modifications or disassembly of power equipment. It can be installed and maintained while equipment remains energized, ensuring uninterrupted power supply and equipment safety.
Type of 3-in-1 Multi-Channel PD Sensor
Fixed Installation Type (Online Monitoring Sensors)
Fixed installation 3-in-1 PD sensors are permanently installed on high-voltage equipment for continuous monitoring. They are commonly used in substations and industrial power systems.
Portable Hand-held Type (Inspection Sensors)
Portable 3-in-1 PD sensors are designed for field inspection and spot testing. They combine multiple detection modes in a compact handheld device.
Modular Multi-Sensor Type
Modular 3-in-1 PD sensors consist of separate sensing modules (ultrasonic, electromagnetic, and electrical) that are physically independent but connected to a unified processing unit.
Clamp-On Type Sensors
Clamp-on 3-in-1 PD sensors are designed to be installed without disconnecting cables or equipment. They are typically clamped onto conductors, grounding wires, or equipment surfaces.
Embedded Type Sensors
Embedded 3-in-1 PD sensors are integrated directly into electrical equipment during manufacturing or installation. They become part of the asset’s built-in monitoring system.
Wireless Smart Sensor Type
Wireless 3-in-1 PD sensors transmit data via wireless communication technologies such as Wi-Fi, Zigbee, or industrial IoT protocols.
Applications of 3-in-1 Multi-Channel PD Sensor
Gas Insulated Switchgear (GIS) Monitoring
3-in-1 PD sensors are used in GIS systems to continuously or periodically monitor insulation condition. They detect internal defects such as particle contamination, voids, and surface discharge with high sensitivity.
Cable Systems and Accessories
They are used in medium- and high-voltage cable networks to detect defects in joints, terminations, and insulation layers. HF current and electromagnetic channels enable accurate fault localization.
Renewable Energy Systems
In wind and solar power systems, the sensors monitor transformers, switchgear, and cable infrastructure. This ensures stable operation and high reliability of distributed energy assets.
Industrial Power Distribution Systems
These sensors are widely used in industrial environments such as factories and petrochemical plants. They help prevent unexpected outages by supporting early insulation fault detection and predictive maintenance.
Railway and Transportation Power Systems
In railway power systems, PD sensors monitor traction substations and high-voltage distribution networks. This ensures safe, stable, and continuous operation of electrified transport systems.
Components of 3-in-1 Multi-Channel PD Sensor
Ultrasonic Detection Module
This module captures airborne and structure-borne acoustic signals generated by partial discharge activity. It is typically equipped with a high-sensitivity piezoelectric microphone and directional probe.
Electromagnetic Detection Module
This part detects high-frequency electromagnetic emissions from PD events in enclosed or cable systems. It usually includes an antenna or RF receiver designed for HF/VHF/UHF frequency ranges.
Electrical Detection Module (TEV / HFCT)
This module measures transient electrical signals caused by partial discharge activity. TEV sensors are used for switchgear surfaces, while HFCT clamps are used for cable grounding conductors.
Signal Processing Unit
The processing unit filters, amplifies, and correlates signals from all three channels. It performs noise reduction and converts raw signals into usable diagnostic data.
Communication Interface
This interface enables data transmission to external systems via Ethernet, wireless modules, or industrial protocols such as Modbus. It supports integration with monitoring platforms.
Power Supply System
The sensor is powered by either a built-in rechargeable battery or an external DC supply. Some advanced models include power management circuits for low-energy operation.
Working Principle of 3-in-1 Multi-Channel PD Sensor
Electrical signals
High-frequency current pulses generated by PD events
Electromagnetic signals
Radiated RF energy from insulation breakdown
Acoustic signals
Ultrasonic waves produced by rapid discharge energy release
Maintenance Best Practices
Proper Storage
When not in use, the sensor should be stored in a dry, temperature-controlled environment with protective casing to prevent damage.
Correct Installation Handling
Care should be taken during installation and removal to avoid mechanical stress on probes, clamps, or connectors.
Periodic Performance Validation
Routine performance checks using known PD sources or test signals help ensure long-term reliability and diagnostic accuracy.
Certificates
FAQ
As one of the most professional partial discharge sensor manufacturers in China, we're featured by quality products and good price. Please rest assured to buy high quality partial discharge sensor in stock here and get quotation from our factory. Customized orders are welcome.
