GE Kelman DGA 900 | Next generation on-line multi-gas DGA
Dissolved Gas Analysis (DGA) and moisture measurement of insulating fluids are recognized as the most important tests for condition assessment of transformers. In previous years, multi-gas DGA was traditionally confined to a laboratory environment, with infrequent off-line manual sampling forming part of time-based maintenance strategies. However, as the global average age of transformers continued to rise, the possibility of rapid ageing, unplanned outages and even catastrophic failure between off-line tests also increased, leading many asset owners to adopt on-line DGA monitoring strategies to increase network reliability.
The Kelman™ DGA 900 is an 9-gas on-line transformer DGA monitoring unit. Using our 4th generation of advanced photo-acoustic detection technology, the DGA 900 measures all significant fault gases (in ppm) as outlined by international standards as well as moisture in oil (%RH & ppm). The measurement of these gases allows the user to detect and diagnose a complete range of transformer faults.
Benefits
- Provides remote alert and multi-gas diagnostic of deteriorating transformer condition
- Expedites operational decisions without needing to go to site for manual oil sampling
- Issues can be detected in their infancy, avoiding unexpected failures and facilitating planned outages
- Anchors condition based maintenance and asset replacement strategies on hard data
- No need for consumables or frequent recalibration to operate at optimum performance
- New "Rapid Mode" provides near real time insight on fast developing faults
- Enhanced computing power, highly scalable I/Os and integrated HMI combine to provide a powerful highly flexible transformer monitoring solution
- Compatible with mineral insulating oils and newer ester based fluids (natural and synthetic)
Features
- DGA & Water – Nine gases (hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, nitrogen and oxygen) plus moisture
- Inputs/Outputs for additional sensors including load and oil temperature
- Full DGA results down to once per hour and new "Rapid Mode" for critical gases in just 30 minutes
- Integrated 7" colour LCD screen for simplified local user interaction and visualisation of data
- Innovative two enclosure design enables adjacent or separated installation arrangements to better accommodate varied site conditions
- Communication Options – Extensive local and remote communications options
Applications
The Kelman DGA 900 is an invaluable foundational tool for implementing Asset PerformanceManagement (APM) across electrical generation, transmission and industry, enabling a conditionbased asset replacement strategy and delivering improvements in system reliability and availability.
A DS-Agile™ and Grid APM ready device, the DGA 900's wide range of communication methods andprotocols enables connection to those platforms and integration with GE's Perception™ transformerfleet management software as well as other software, historian and SCADA systems.
