Dissolved Gas Analyser / TOGA

Introduction
Some faults in the electrical transformers can result in the production of gases which remain dissolved in the transformer oil. Hydrocarbons, methane, ethane, ethylene, acetylene, H₂CO and CO₂ are the important gases which are determined along with non faulty gases such as N and O by DGA.

The Dissolved Gas Analyser (DGA) helps in the analysis of these gases dissolved in insulating oil, so as to give the earliest possible detection of an incipient fault, thereby averting a possible accident. This technique helps to detect such gases in ppm levels.

Features & Benefits:

TOGA ( D3612 Method C)

• Electric actuated 6-way injection valve (VICI).with 1 ml sample loop temperature-steadily up to 350 °C.
• Automatic samples recognition.
• Heated incubation oven for 12 samples (40°C – 200°C, in 1°C-steps) with integrated shaker.
• Carrier gas controlled direct from the GC.
• AUX gas controlled by the Head Space Sampler
• The HSS can be connected to different GC's by a flexible transfer line ( fused silica transfer line can be installed easily).
• Total automated system.
• Highly reproducible results.
• No use of mercury , glass part and vacuum system hence very rugged.
• Trace level detection of Gases.
• Heated inert Transfer line.
• Flexibility using HSS or Manual syringe Sample injection.
• High Volume Methanator.

DGA ( D3612 Method A)

• Highly reproducible results.
• Trace level detection of Gases.
• Vacuum Tested Glass Apparatus.
• Complete Package including Vacuum Pump Mercury Vacuum Gauge
• High Volume Methanator
• Software for results interpretation as per IEEE/ANSI C57.104 Guideline Rogers ratio, Key gas method ETC

Configuration

GC Trace 800 Flame Ionisation Detector (FID) Thermal Conductivity Detector (TCD) Column Switching valves Catalytic Reactor (Methaniser) Head Space Sampler (HSS) or Glass Apparatus Set Capillary or Packed set of Columns as per the method Calibration Standards Chromatography Management Software