GE TRANSFIX DGA 500 Transformer Health Monitoring & Diagnostics

Product Overview

The TRANSFIX™ DGA 500 is an on-line monitoring unit that measures individual dissolved gas and

moisture and provides both on-line monitoring and key exploratory diagnostics. It uses the now

well known PAS technology (Photo Acoustic Spectroscopy) made popular due to its accuracy,

repeatability and lack of consumable through its bigger brother the Kelman™ DGA 900.

When a transformer’s insulation system is overstressed, gases are produced that dissolve in the

transformer’s insulating oil. Dissolved Gas-in-oil Analysis (DGA) and moisture measurements are

recognized as the most important tests for condition assessment of transformers and the best early

indicators of developing faults.

All types of incipient faults are covered by the monitoring of hydrogen gas levels. Slowly eroding

paper faults can be exposed through the monitoring of carbon monoxide. Various degrees of thermal

faults, including arcing, can be detected and identified, often leading to a transformer repair rather

then a much more costly transformer rebuild.

In particular, the TRANSFIX DGA 500 enables the well known Duval’s triangle DGA diagnostic

described in Appendix B of IEC Standard 60599. It uses the value of 3 gases (Acetylene, Ethylene and

Methane) and is suitable for identifying various degrees/temperature of thermal faults as well as the

presence of high-energy electrical discharge faults.

Key Benefits

• Ability to perform Duval’s triangle DGA diagnostic

• Easily replaceable with a full nine gas unit

• Communicates data to allow remote diagnostic

• No carrier or calibration consumable gases required

• Available with AC or AC/DC power supply

Applications

Power Utilities

• Middle of the road solution for medium-criticality transformers

• Monitoring together with remote exploratory diagnostic

Industrial Plants

• Reduces the risk of process interruption due to power failure

• Minimizes costly production downtime