SF₆-Breaker-Analyser

Applications

Measurement of the SF₆-purity, moisture, and decompsition producted in SF₆-filled equipment

Special Features

• Integrated data acquisition and storage
• Automatic validation of readings (according to CIGRE, IEC, or customer specified standards)
• Fast test results (app. 7 min. total), with the ability to stop the measurement after it has passed
• High sensitivity and precision

Description

Having the full picture of what is going on inside SF₆ tanks is a must in order to ensure the operational safety of switchgear.  Since contaminents increase with each breaker operation, they can grow to a point where safe operation is impeded.  Regularly measuring the chemical composition of the gas in a circuit-breaker is needed to make sure the contaminents are within allowable tolerances.    

The SF₆-Breaker-Analyser is the most time and cost effective instrument to do this because the:

• Measurement & analysis are done using a single sample of gas
• Results are displayed within 5-7 minutes
• Unit is light weight, compact, and easy to carry  

The SF₆-Breaker-Analyser measures percentages of:

• SF₆ gas
• Humidity/moisture
• SO₂ acid

NOTE: SO₂, SOF₂, and HF acids occur in predictable ratios inside of SF₆-insulated switchgear, requiring detection of only one of them in order to know the acidity level inside the tank.  WIKA Gas Analytic equipment detects SO₂ with a cross sensitivity to SOF₂ because it allows for more accurate calibration.  SO₂ & SOF₂ react slowly over a long time period with encasing materials while HF reacts immediately with encasing materials.  This introduces error into the calibration process because a test sample of the acid is needed for calibration and this sample immediately begins to react with the encasing material so that it is no longer a pure reference.