| PDtect®4 Mobile | PDtect® X6 | PDtect® Zone |
|---|---|---|
| Relocatable, trailer-mounted radiometric PD detection and location system suitable for air-insulated substations. Bespoke ultra-high-speed recording unit records and logs PD events. GPRS/3G mobile phone communications used to transfer data to Elimpus web server for user results. Powered from 230 Vac. | Radiometric PD detection and location system suitable for AIS, GIS, transformer and cable sealing end PD monitoring. Continuously monitors HV assets for PD. Results are communicated to a server where PD can be analysed and located remotely by the user. | Radiometric PD detection and location system suitable for air-insulated substations. Permanently fixed monitoring equipment in the high-voltage compound continuously monitors for PD. The results are communicated to a server where the PD locations can be accessed and viewed by the user. This is overlaid onto a map of the substation with the zones determined by the antenna locations. |
| PDtect4 system fitted into a road-legal (EU) trailer. | Securely installed to existing steelwork in minutes. Stainless steel. Easy to relocate. | Permanently installed multi-channel antenna array fixed in, or close, to the high-voltage compound. |
| Trailer can be located in, or close, to the high-voltage compound. | Connects to multiple sensor types including bespoke antennas, GIS internal/external sensors, transformer UHF probes, HFCTs etc. | Large array dimensions – typically > 5 m – give good location resolution. |
| Four antenna array is located underneath the dielectric roof of the trailer. | On-site recording hardware monitors for PD 24 hours a day, 365 days a year. | Wideband slim antennas give high sensitivity to PD impulses and easy mounting options. |
| Simple and rapid deployment of the trailer. | Ultra-fast FPGA sampling at 1.5Gs/s allows for very accurate location of PD. | On-site recording hardware monitors for PD 24 hours a day, 365 days a year. |
| Wideband diskcone antennas give high sensitivity to PD impulses. | NServer web software collects site recorded data and processes PD positions. | NServer web software collects site recorded data and processes PD positions. |
| On-site recording hardware monitors for PD 24 hours a day, 365 days a year. | Site recorded data uploaded to NServer every 90 seconds for near real-time PD display. | Site recorded data uploaded to NServer every 90 seconds for near real-time PD display. |
| NServer web software collects site recorded data and processes PD positions. | Ability to set alerts for PD rate of emission and amplitudes metric. | Ability to set alerts for PD rate of emission and amplitudes metric. |
| Site recorded data uploaded to NServer every 90 seconds for near real-time PD display. | ||
| Ability to set alerts for PD rate of emission and amplitudes metrics. |
Radiometric partial discharge monitoring (PDM) surveys are a rapid, safe and cost-effective way to monitor high-voltage equipment. Partial discharge monitoring surveys utilise PD location and data acquisition equipment, installed in a trailer, that can be located around a substation, surveying all of the high-voltage equipment.
Monitoring can be conducted for a few hours or over extended periods where ongoing condition assessment is important or safety is critical. For example, during maintenance works, temporary trailer placement makes an important contribution to on-site safety when risk is higher and impact at its highest. Similarly, assets planned for replacement should be subjected to partial discharge monitoring, allowing flexibility in prioritisation of works and capital expenditures.
For permanent installations, the PDtect® Zone system fulfils a similar role but against a different set of circumstances. Typically, where a site is pivotal to network function or ongoing safety is a concern, such as proximity to the public or regular staff presence, areas (zones) to be avoided or investigated are clearly identified.
Data is recorded and transferred to the cloud server and monitored with alarms.
