Secure your grid against outages and stay informed regarding the condition of your switchgear at all times.
OTEM - detects and localizes partial discharges in gas-insulated switchgear
Detection of partial discharges with optoelectronic sensors
Detecting partial discharges in gas insulated switchgear is the primary purpose of the optical partial discharge system. As a result, considerable damage up to the worst-case scenario, the so-called "blackout", can be avoided. The optical partial discharge system also eliminates the need for time-consuming localization efforts by precisely identifying the affected gas compartment within the switchgear. As such, our optical systems can be a valuable addition to your existing monitoring systems.
The OTEM partial discharge monitoring system reliably monitors the condition of your GIS and enables you to take preventive action. This allows affected components to be replaced or repaired at an early stage without causing a failure or major damage (e.g. due to the development of an arc fault) to the system.
OTEM is particularly suitable if your GIS already is equipped with light sensors. In this case, the switchgear can be upgraded cost-effectively and efficiently.
For systems without a dedicated light sensor, the system can be installed on standard glass windows (e.g. available on the disconnectors) . This makes the system suitable for new and existing installations, particularly in the high-voltage sector.
- Testing / commissioning of the GIS/GIL
- Monitoring of the GIS/GIL
- Maintenance / repair of the GIS/GIL
All optoelectronic sensors are connected to the local control cabinet
The test can be performed at any time
| Precise detection down to the individual gas compartment |
| Exact diagnosis of the specific fault |
| Suitable for DC and AC voltage systems |
| Insensitivity to electromagnetic interference from various sources (e.g. UHF signals, radio/TV, mobile radio, electrical machines) |
| Diagnostics also possible during operation (especially during switching operations) |
| Specifically engineered for switchgear in high-voltage environments |
| Easy installation and operation |
Signal recording and visualization
Due to the virtually interference-free signal recording, no further filtering of the signals by the operator is required.
Individual inspection and test solutions for your switchgear
Permanent monitoring of the condition of the GIS
As a permanently installed solution, server for the OTEM can be installed in standardized racks or as a standalone solution in order to save space. The unit is robust and resistant to external influences. In particular, the entire system is insensitive to electromagnetic interference. The modular system also allows for additional gas compartments to be installed at any time without interfering with the existing system in operation. In summary, the fixed installation of our OTEM system for monitoring partial discharges is the best option for accurately assessing the condition of your GIS at any time.
Mobile testing for partial discharges
As an alternative to the fixed installation, the testing of your GIS for partial discharge can also be carried out at intervals as a mobile test. The test itself is carried out by our qualified personnel. After completion of the switchgear´s test, you will receive an insightful test report, which you can use to accurately assess the condition of the high-voltage system. The mobile test method is also carried out independently of electromagnetic interference signals (e.g. from cellphones, radio traffic, electrical devices, etc.). The result is always accurate and precise.
