Transfix DGA 500
The Transfix™ DGA 500 is an on-line monitoring unit that measures five individual dissolved gases and moisture, and provides both on-line monitoring and key exploratory diagnostics. It uses GE’s advanced Photo-acoustic spectroscopy (PAS) technology, made popular due to its accuracy, repeatability and lack of consumable through its bigger brother the Kelman™ Transfix.
Features
- Automated, on-line multi-gas and moisture monitoring
- Provides early identification of arcing issues before they become critical failures
- Ability to perform Duval’s triangle DGA diagnostic
- Easily replaceable with a full nine gas unit
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
Technical Specifications
Sensor
- Automated head space gas extraction
- Photo-acoustic spectroscopy(PAS)gas measurement
- Thin film capacitive moisture sensor
Measurements
- Hydrogen(H2):5-5,000ppm
- Carbon Monoxide(CO):2-50,000ppm
- Acetylene(C2H2):0.5-50,000ppm
- Ethylene(C2H4):2-50,000ppm
- Methane(CH4):2-50,000ppm
- Moisture(H2O):0-100%RS(given in ppm)
Accuracy
- Gases*:±5%or±LDL(Lower Detection Limit),which ever is greater
- Moisture:±2%RH
Frequency
- Configurable from once per hour to once
every4weeks
- Faster sampling automatically triggered upon alert level reached
Transfix DGA 900
The Kelman DGA 900 TAPTRANS is the next generation 9-gas on-line transformer multi gas DGA (Diagnostic Gas Analyzer) monitor. Built from the DGA 900 platform, the TAPTRANS extends the capability beyond measuring a single transformer main oil tank.
Features
- 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.
- Provides early identification of arcing issues before they become critical failures
- Ability to perform Duval’s triangle DGA diagnostic
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
Technical Specifications
Technology
- Automated head space gas extraction
- Photo-acoustic spectroscopy(PAS)gas measurement
- Thin film capacitive moisture sensor
- Immersed Fiber Optic Oxygen sensor
Frequency
- Configurable from once per hour to once every 4weeks
- Faster sampling automatically triggered upon alert level reached
- “Rapid Mode” provide sharp indication of the evolution of the gasses indicated below in~30 minutes
- Faster sampling automatically triggered upon alert level reached
| Details | LDL | UDL | Accuracy* | Repeatability | AvailableinRapidMode |
| Hydrogen(H₂) | 5- | 5,000ppm | ±LDLor±5% | <3% | • |
| Carb. Monox. (CO) | 1- | 50,000ppm | ±LDLor±3% | <2% | • |
| Methane(CH₄) | 2- | 50,000ppm | ±LDLor±3% | <2% | |
| Acetylene (C₂H₂) | 0.5- | 50,000ppm | ±LDLor±3% | <2% | • |
| Ethylene (C₂H₄) | 1- | 50,000ppm | ±LDLor±3% | <2% | |
| Carb.Diox.(CO₂) | 20- | 50,000ppm | ±LDLor±3% | <3% | • |
| Ethane(C₂H₆) | 1- | 50,000ppm | ±LDLor±3% | <2% | |
| Oxygen(O₂) | 100- | 50,000ppm | ±LDLor±5% | <2% | • |
| Nitrogen(N₂)** | 10,000- | 100,000 ppm | ±LDLor±15% | ||
| Moisture(H₂O) | 0- | 100%RS (in ppm) | ±3%RH | <3% | • |
