GWPD‑HMI‑14 Partial Discharge Monitoring HMI Unit
The GWPD‑HMI‑14 partial discharge monitoring HMI unit is a centralized monitoring and management host integrated with a 14‑inch industrial HMI touch screen. Equipped with a built‑in touch display, it requires no external monitor or host computer, enabling on‑site parameter configuration, sensor management, real‑time data reading and partial discharge spectrum viewing. The host supports connection of up to 200 partial discharge sensors, employing dual downstream communication modes: LoRaWAN wireless and RS485 wired. It locally analyzes and displays characteristic spectra, PRPS phase‑resolved spectra and cumulative PRPD phase‑resolved spectra, with built‑in local historical event storage. Via RS485 and RJ45 uplink interfaces, it connects to SCADA and power comprehensive monitoring platforms, enabling long‑term online partial discharge monitoring and insulation defect early warning for high‑voltage equipment such as switchgears, GIS and transformers. Supporting a wide range of AC/DC power supply in compliance with power industry standards and adopting wall‑mounted installation, it is suitable for use in substations, switching stations and industrial power distribution rooms.
Main Functions
14‑inch Industrial Touch Screen HMI
- Equipped with a built‑in 14‑inch industrial touch screen, all operations can be completed locally without an external computer. On‑site staff can perform parameter settings and sensor configuration, and view real‑time data via touch operation. The device directly displays original partial discharge waveforms, characteristic spectra and PRPD/PRPS phase‑resolved spectra locally, simplifying on‑site commissioning and inspection work.
Centralized Management of Large‑Scale Sensors
- A single host can access up to 200 partial discharge sensors, enabling centralized and unified monitoring of multi‑bay switchgears and multiple transformers. It is suitable for medium and large‑scale substation and distribution station projects, meeting the demand for synchronous monitoring of large equipment fleets.
Dual‑Mode Sensor Access (Wired/Wireless)
- The device supports both LoRaWAN wireless and RS485 wired downstream access. The wireless solution eliminates cabling construction for new projects and reduces costs; the RS485 wired transmission ensures stable communication and strong anti‑interference performance for retrofit projects and high electromagnetic interference environments, compatible with various partial discharge sensors such as TEV, ultrasonic and high‑frequency current transformer (HFCT) sensors.
Local Analysis and Display of Complete Partial Discharge Spectra
- The device independently analyzes and renders full sets of partial discharge data including characteristic spectra, PRPS phase‑resolved and cumulative PRPD phase‑resolved spectra without relying on a background system. On‑site operation and maintenance personnel can analyze equipment discharge characteristics, identify insulation defect types and evaluate insulation deterioration levels locally, while outputting standardized data for synchronous upload to the monitoring background platform.
Local Historical Event Recording and Storage
- The built‑in storage module saves up to 200 historical events and abnormal alarm records with power‑off data retention. Staff can directly query historical fault data via the local touch screen for rapid fault tracing and problem review, providing data support for equipment maintenance.
Seamless Multi‑Platform Connection via Multiple Interfaces
- Equipped with 4‑channel RS485 and 1‑channel RJ45 uplink interfaces, the device features high compatibility and stably connects to SCADA systems and power comprehensive monitoring platforms, enabling remote data transmission, remote parameter configuration and remote alarm push, adapting to smart power operation and maintenance management.
Local Alarm with Customizable Thresholds
- Users can independently set partial discharge alarm thresholds on the touch screen. When partial discharge data exceeds the limits or insulation abnormalities occur, the device triggers an on‑screen local alarm and synchronously uploads alarm information to the background platform, providing timely warning of insulation deterioration risks and avoiding potential failures of power equipment.
Wide‑Voltage Adaptation for Power Industry
- Compatible with AC85‑265V and DC110‑370V power supply standards, the device can be directly connected to conventional AC/DC operating power supplies in substations without additional power conversion devices, adapting to various complex on‑site power conditions.
Detailed Technical Parameters
| Parameter Item | Specification |
| Model | GWPD‑HMI‑14 |
| Product Name | Partial Discharge Monitoring HMI Unit |
| Display & Operation | 14‑inch industrial touch screen, local HMI interaction, local spectrum display |
| Max. Sensor Capacity | 200 sensors |
| Uplink Communication Interface | RS485×4, RJ45×1 |
| Downlink Access Mode | LoRaWAN wireless & RS485 wired dual mode |
| Spectrum Types | Characteristic Spectrum / PRPS / Cumulative PRPD |
| Local Historical Records | 200 records (power‑off retention, touch‑screen queryable) |
| Operating Voltage AC85‑265V; DC110‑370V | Power Consumption ≤5VA |
| Installation Method | Wall‑mounted |
Application Scenarios
- Online partial discharge monitoring for high‑voltage switchgears, ring main units and gas‑insulated switchgears
- Partial discharge online monitoring for GIS gas‑insulated switchgear equipment
- Insulation partial discharge online monitoring for power transformers
- Centralized insulation condition monitoring of high‑voltage equipment in substations, switching stations and industrial power distribution rooms
