Partial Discharge & Passive Wireless Temperature Monitoring System

MOEORW-W5080PF Partial Discharge & Passive Wireless Temperature Monitoring System is an integrated complete set of power online monitoring equipment developed for high-voltage switchgears, ring main units and cable distribution boxes. It comprehensively solves two core hidden dangers of power safety, namely overheating of internal contacts and busbars and partial discharge of cable joints, fully covering B-end engineering scenarios including power distribution stations, industrial & commercial power rooms, rail transit power distribution rooms, wind power and photovoltaic box transformers.

The system adopts a three-layer standardized architecture: Perception Layer (passive temperature sensors + three-in-one partial discharge sensors), Relay Layer (10-inch industrial monitoring terminal), Application Layer (PC background/cloud platform). All devices adopt unified 433MHz wireless communication without on-site wiring renovation, suitable for two types of mass projects: existing cabinet renovation and new power distribution projects. The whole set of equipment supports standard protocols, uploading data to background via RS485, Ethernet port and 4G, and can connect to self-owned power monitoring platforms of State Grid and industrial & mining enterprises. Wholesale customers can deliver projects directly without additional secondary development.

The complete system consists of three types of core hardware, all fully tested through high-low temperature aging, EMC, waterproof and dustproof tests before delivery. All parameters are calibrated by actual measurement, and third-party test reports can be provided for all values, adapting to harsh working conditions such as outdoor areas, basements and high-temperature power rooms:
 

1.Passive Wireless Temperature Sensor

• Passive self-powered design: Energy harvested from electromagnetic field without batteries, with a service life of 10 years, eliminating operation and maintenance costs of mass battery replacement in later stage.
• Wide temperature operating range: Temperature measurement range -40℃~125℃, operating environment -40~125℃ with relative humidity ≤95%RH, stable operation for outdoor projects in high-temperature southern areas and low-temperature northern areas.
• High-precision temperature measurement: Measurement accuracy ±1℃. The data upload interval dynamically adjusts from 6s to 180s (shorter interval at higher temperature), capturing overheating faults within milliseconds to avoid missing temperature rise alarms.
• Wireless transmission: 433MHz frequency band with 300m line-of-sight transmission distance. The stable transmission distance reaches 120m under actual conditions with multiple cabinets blocking in factory zones and power rooms. A single terminal can connect up to 360 temperature measuring points, meeting mass monitoring demands of large power distribution rooms.
• Strapped installation: Suitable for busbars, moving/static contacts and cable inlet/outlet. Installation without power cut greatly shortens project construction cycle and reduces labor cost for mass construction.
   

2.Three-in-One Partial Discharge Sensor (Simultaneous detection of TEV, Ultrasonic and UHF three channels)

• Triple partial discharge detection principles: Transient Earth Voltage (3MHz~100MHz), Ultrasonic (20K~200KHz), UHF (500MHz~1500MHz). Single detection method is prone to missing detection, while synchronous collection of three channels greatly improves the detection rate of partial discharge faults.
• Dual power supply options: 3.7V lithium battery with 2-year endurance or external AC220V power supply, adapting to different projects with non-powered cabinets and active cabinets. Two versions can be matched as required for mass supply.
• IP54 protection grade, stable operation at -40℃~85℃. Magnetic adsorption installation without drilling to damage cabinets. Optional national secret SM1/SM7 hardware encryption to meet mandatory bidding requirements of power grid confidential projects.
• 433MHz wireless transmission distance ≥300m, sampling cycle 3s, real-time collection of partial discharge volume and discharge times, automatic upload of alarm data when exceeding standard, sensitivity 5dBm capable of identifying weak partial discharge signals.
   

3.10-inch Intelligent Online Monitoring Terminal (Core hub of the whole system)

• Industrial-grade 10-inch touch screen with ARM embedded architecture, overall power consumption only 6W, low energy consumption for long-term 24-hour continuous operation and lower power loss for mass projects.
• Strong point compatibility: A single terminal supports maximum 40 switchgears, 360 temperature measuring points and 80 partial discharge sensors. Only a small number of terminals are required for full coverage of large substations, reducing procurement quantity.
• Multi-communication expansion: Standard 1-channel RS485 and 1 Ethernet port, expandable second RS485 channel and optional 4G remote transmission module, supporting dual modes of local monitoring and remote cloud platform to adapt to different intelligent renovation standards of Party A.
• Dual installation modes: Embedded panel opening / wall-mounted. Two installation specifications are uniformly standardized, so engineering merchants do not need to distinguish models for mass stocking. Built-in 16GB local storage, historical temperature and partial discharge alarm data will not be lost after power failure, providing evidence for fault tracing.
• Multi-level alarm output: 1 standard relay alarm channel expandable to 3 channels, matched with terminal sound and light alarm. Over-temperature and partial discharge abnormalities trigger pop-up windows, buzzer and dry contact output simultaneously, complying with fire protection and power safety linkage specifications.

1.Integrated complete set supply to reduce customers' comprehensive procurement cost Most manufacturers in the market produce temperature measuring and partial discharge equipment separately, requiring customers to dock two suppliers with long procurement cycle and vague division of after-sales responsibilities. Our factory independently develops and produces the whole set of equipment, with natively matched communication protocols between sensors and terminals without compatibility faults. The wholesale bundled purchase price is 15%-25% lower than separate purchase, and additional stepped price negotiation is available for mass engineering orders to improve dealers' project profit margin.

2.Passive maintenance-free design to drastically reduce after-sales complaints from end customers Temperature sensors have no batteries with a service life of 10 years, and the battery version of partial discharge sensors has a 2-year endurance. Compared with similar products requiring battery replacement every 1-3 years on the market, almost no on-site operation and maintenance is needed within 5-10 years after project delivery. Dealers' after-sales labor cost is reduced by 70% after undertaking projects, cutting complaints from Party A and facilitating long-term repeat purchases of dealers.

3.Standardized general hardware and software for faster inventory turnover All sensors and terminal hardware adopt unified models, with self-adaptive ID mapping function built in software, no customized equipment required according to switchgear models. Dealers can stock in bulk regardless of project types with low risk of overstock. Visual configuration on terminal touch screen completes all point settings of a single cabinet within 10 minutes on site, improving construction efficiency by 60%.

4.Comply with power grid bidding qualification requirements to help customers win projects The equipment supports national secret encryption, with third-party type test reports, high-low temperature/EMC test certificates and IP protection certifications available. Full set of bidding qualification documents are delivered together with goods. Small and medium manufacturers of similar products lack encryption and authoritative test qualifications, so this product forms differentiated competitive advantage for customers during bidding and significantly improves bid winning rate.

5.Wireless wiring-free renovation with exclusive advantages for existing cabinet renovation projects Traditional wired temperature measuring equipment requires power cut and wiring with long renovation cycle and high construction safety risks. This system adopts 433MHz wireless communication, sensors are directly installed by adsorption or binding without drilling and wiring. No power cut is needed for renovation of existing power rooms, construction time for a single cabinet is shortened to 15 minutes, enabling dealers to undertake more incremental projects of old cabinet renovation.

The terminal is equipped with 6 built-in visual operation interfaces with full touch screen Chinese operation, operable without professional electricians. Matching PC background management software meets the digital operation and maintenance demands of Party A's power department:
1.Real-time data interface: Synchronously display three-phase temperature of A/B/C and three-channel partial discharge values (TEV/Ultrasonic/UHF) in table form, with fault points highlighted in red for intuitive hidden danger positioning. A single terminal supports unified display of up to 360 points, so operation and maintenance staff do not need to inspect each cabinet one by one.

2.ID mapping configuration interface: Visually bind sensor IDs with switchgears and contact positions. The installation position of equipment is directly displayed during fault alarm, eliminating the need to search sensors one by one for after-sales maintenance and shortening fault handling time.

3.Historical curve & alarm record module: Automatically store full-cycle temperature and partial discharge data, support Excel report export, complying with power industry safety file archiving standards. Fault data of the past year can be traced back to provide data support for equipment maintenance and preventive tests.

4.Customizable system parameters: Warning/alarm temperature, communication baud rate, 4G remote IP and relay alarm logic can all be customized via touch screen, adapting to different power room management standards of Party A without factory return for program modification and cutting after-sales debugging cost.

5.Clock calibration & local program upgrade: Local firmware upgrade via SD card without on-site computer wiring, more convenient for dealers' mass remote maintenance. Automatic clock calibration ensures unified data timestamps to meet regulatory data traceability requirements.

6.Multiple remote transmission modes: Optional RS485 local MODBUS, Ethernet TCP/IP and 4G wireless remote transmission, compatible with power monitoring platforms, energy management systems and building BA systems, adapting to intelligent platform docking demands of industrial & commercial, power grid and rail transit Party A customers.

1.Delivery Capacity of Production: Delivery cycle guarantee for mass orders, monthly output, stocking inventory and urgent production channel in peak seasons. Customers worry about delayed delivery for rush projects.
 

2.Integrated R&D & Production: Independent R&D of PCB boards, sensors and complete terminal machines without outsourced OEM, controllable quality consistency to avoid project debugging faults caused by parameter deviation of equipment in different batches.
 

3.Full-process Quality Control & Testing: Incoming material inspection, SMT chip mounting, semi-finished product aging, complete machine high-low temperature test and full EMC inspection before delivery. Whether the factory holds third-party laboratory qualification and the control level of product defect rate.
 

4.Qualification & Certification Reserve: Type test reports, power grid network access certification, national secret encryption qualification, ISO9001 production system, export CE/FCC certification. Bidding customers need full set of qualification documents.
 

5.Custom Development Capacity: Support for interface modification, MODBUS protocol adjustment, additional 4G/encryption modules and customized neutral OEM packaging, adapting to dealers' own brand distribution.
 

6.Mass After-sales Service: On-site technical support for bulk orders, warranty period, spare parts inventory, remote debugging technical team and rapid replacement policy for mass faulty products.
 

7.Supply Chain Stability: Long-term locked-price supply of core components, no risk of supply interruption for chips, batteries and display screens. No arbitrary price hike when raw material prices fluctuate to ensure stable profit of dealers.