Dissolved Gas Analysis (DGA) and moisture measurements 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 yearly off-line manual sampling aiding time-based maintenance strategies.
However, as the global average age of transformers continued to rise, the possibility of rapid aging and even catastrophic failure between off-line tests also increased, leading many asset owners to adopt on-line DGA monitoring to provides remote alert and multi-gas diagnostic of deteriorating transformer condition.
Online DGA is now accepted as the most effective method of assessing the condition of a transformer, it does not cover all the possible sources of issues. Sub-systems like the tap changer, the cooling system or the bushings can generate their own problems if they are left unmonitored.The DGA 900 PLUS monitoring system integrates DGA measurement, additional sensors, analysis models and data handling features to address the majority of prevalent failure modes.
The DGA 900 PLUS is a cost-effective package providing the condition assessment tools essential for the effective management and optimal utilization of this critical asset.
Available Add-on cards:
- Bushing Monitoring
- Electrical Partial Discharge
- On Line Tap Changer
- Transformer Insulating system
DGA 900 PLUS is most suited for monitoring large, mission critical transformers or compromised transformers with a view to extending their life and preventing any unexpected failure:
- GSU (Generation)
- HVDC station transformers
- Transmission transformers
- Process critical Industrial transformers