Brochure · EN — Siemens Energy Transmission Service brochure (© 2021, 3 pages) for Assetguard PDM, a highly accurate online condition monitoring system for gas-insulated switchgear. It detects and analyzes partial discharges via emitted UHF signals — the method of choice for GIS failure detection — with a built-in neural network for pattern recognition, and is compliant with IEC TS 62478. The modular system covers all sizes and manufacturers of GIS substation, runs with internal or external UHF sensors (retrofit or new switchgear, indoor or outdoor), and integrates via the Assetguard Gateway with IEC 61850, DNP3, volt-free contact and API connectivity, a web-based user interface, and a minimum of 2 years of data storage.
Most failures at GIS are in coincidence with partial discharge from an early stage of the particular failure. Detecting and analyzing those partial discharges via the emitted UHF signals is the method of choice for failure detection in gas-insulated switchgear.
Siemens Energy Assetguard PDM is a highly accurate online condition monitoring system for GIS, analyzing the UHF signals for severity and type of fault, providing a comprehensive early warning system for GIS failures. It is compliant with "IEC TS 62478: High Voltage Test Techniques – Measurements of partial discharges by electromagnetic and acoustic methods".
Assetguard PDM is a modular system to cover all sizes and manufacturers of GIS substation. It can be operated with internal and external UHF sensors, and has superior qualities regarding environmental, electro-magnetic and ingress protection — so it is perfect for retrofit or new switchgear, indoor or outdoor installation.
Assetguard PDM performs the UHF signal analysis in terms of observing the intensity as well as providing diagnostic results regarding the source of partial discharge by usage of the built-in neural network for pattern recognition.
Besides alarming using state-of-the-art communication protocols, an individual and interactive single-line diagram allows to quickly localize and qualify those alarms. Furthermore, the alarms are easily forwarded to Siemens Energy Customer Support Center for expert involvement.
The web-based user interface presents its information, including live data and diagnostic results, simultaneously for various users on different locations, even on mobile devices.
Partial discharge experts can use the built-in user interface features to assess historical data. This data can also be exported and provided to a remote expert from Siemens Energy for asset condition reports or on-site condition assessments.
The brochure lists six benefits verbatim: early warning in case of evolving dielectric failure; an expert system that gives diagnostic of the reason for partial discharge sources; avoidance of unplanned outages and support of maintenance planning; facilitated integration (e.g., in SCADA systems or asset management platforms) and usability in current utilities networks; easy involvement of Siemens Energy Customer Support; and seamless combination with Assetguard products for gas density and circuit breaker monitoring.
The delivered scope comprises: optional external UHF sensors for retrofit installations; Assetguard PDM field devices for signal acquisition; the Assetguard Gateway to integrate the data from the PDM field devices and optional gas density or circuit breaker field devices; the web-based user interface; and a central cubicle containing the Assetguard Gateway and further needed network and communication components.
The architecture diagram (page 2) shows the Assetguard Gateway connected through a LAN switch and FO Ethernet to up to 50 Assetguard PDM field devices. Field device versions exist for 3 or 6 sensors: each field device connects 3x or 6x internal or external UHF sensors over coaxial cable of <= 10 m, plus 1x noise antenna per field device.
Acquisition block of the specification table (page 3), verbatim as printed:
| Parameter | Value |
|---|---|
| UHF Detection Sensitivity | -85dBm |
| Dynamic Range | 60dBm typical |
| Frequency Response | 145 to 1700 MHz, selection Gain and Filter Bands |
| Acquisition | 12-bit A/D @ 5kS/s |
| PD Expert Analysis | Neural Network with pattern recognition |
| Noise Management | Noise cancellation and Noise Pattern recognition |
Field device block of the specification table (page 3), verbatim as printed. Note: the environmental lower bound is printed "25 °C" with no sign in the PDF — reproduced as printed.
| Parameter | Value |
|---|---|
| Input Channels | 3 or 6 PD UHF channels plus 1 noise detection input |
| Enclosure Dimensions | 400 x 300 x 225 mm |
| Environmental Conditions | 25 °C to +55 °C, 93% RH |
| Shock Resistance | Vibration (1g) Shock (15g) |
| EMC Standards | IEC 61000-6-5 |
| Ingress Protection Rating | IP54 or higher |
The Gateway block of the specification table is a single line, verbatim: "IEC 61850, DNP3, Volt-Free Contact, API, Min. 2year data storage, Web based UI".
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