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