SF6 Gas Analyzer MBW 973-SF6

The 973-SF6   is an advanced SF6   gas analyzer for the measurement of humidity, SF6 purity and SO₂ concentration in SF6 gas insulated switchgears (GIS) and other high voltage equipment. With its internal gas containment and recovery system, the 973-SF6 provides a high quality and environmentally safe measurement solution within a single self-contained unit.

Pure SF6 is the standard filling within GIS, but over time gas compartments become contaminated with water vapor (H₂O) through permeation and by desorption from internal materials. Whilst water vapor and SF6 do not normally react with each other, in the presence of a high-energy discharge, hydrogen and oxygen disassociated from water vapor will react with the sulfur and fluorine from SF6 to form decomposition by-products. These include sulfur dioxide (SO₂) and hydrofluoric acid (HF) that are corrosive to the internal components of gas compartments.

SF6 with low water vapor content (low humidity) significantly reduces the potential for formation of these corrosive compounds, which is why accurate and repeatable measurement data is an invaluable part of any GIS preventative maintenance program.

The 973-SF6 is supplied as a complete set that includes:

• 973-SF6 instrument;

• Transport Peli-Case 1620;

• 6 meters stainless steel armored PTFE tubing;

• SF6 coupling DN8 with quick coupling (Rectus);

• SF6 coupling DN20 with quick coupling (Rectus);

• 90° angle for rectus-coupling;

• Serial cable DB9 3m 1:1 male/female;

• RS-232 / USB adapter;

• USB stick with 973-SF6  software and operation manuals;

• Power cable (country specific);

• Hex key for SO₂ module;

• SO₂ dummy sensor;

• Cotton swabs, sterile (10 pieces);

• Operation manual (2 pieces);

• Calibration certificate.

Features:

• Simultaneous measurement of humidity, SF6 purity and SO₂ concentration;

• Integrated gas recovery system with automatic pump back;

• Fully automated SF6 gas testing;

• Fundamental drift-free measuring principle;

• Measurement results at SF6 compartment or standard pressure;

• Intuitive color touch screen user interface;

• User verifiable calibration;

• Robust case for easy transportation.

Typical applications: